tl7705a 芯片说明

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AD7705中文资料

ad7706,ad7705中文资料,工作原理，C语言接口程序，引脚图，管脚工作原理：AD7705/06以及AD7707是比较典型的一种16位A/D转换芯片。

AD7705/06芯片是带有自校正功能的Σ-Δ于A/D转换器。

其内部由多路模拟开关、缓冲器、可编程增益放大器（PGA）、Σ-Δ调制器、数字滤波器、基准电压输入、时钟电路及串行接口组成。

其中串行接口包括寄存器组，它由通讯寄存器、设置寄存器、时钟寄存器、数据输出寄存器、零点校正寄存器和满程校正寄存器等组成。

该芯片还包括2通道差分输入（AD7705）和3种伪差分通道输入（AD7706）。

AD7705/06的PGA可通过指令设定，对不同幅度的输入信号实现1、2、4、8、16、32、64和128倍的放大，因此AD7705/ 06芯片既可接受从传感器送来的低电平输入信号，亦可接受高电平（10V）信号，它运用Σ―Δ技术实现16位无误码性能；它的输出速度同样可由指令设定，范围由20Hz到500Hz；它能够通过指令设定对零点和满程进行校正；AD7705/06与微处理器的数据传送通过串行方式进行，采用了节省端口线的通讯方式，最少只占用控制机的两条端口线。

AD7705引脚图（管脚图）：AD7706引脚图（管脚图）：AD7705与68HC系列单片机的C语言接口程序：/* This program has read and write routines for the 68 HC11 to interface to the AD7705 and the sample progra m sets the variousregisters and then reads 1000 samples from one chann el. */#include <math.h>#include <io6811.h>#define NUM_SAMPLES 1000 /* change the number of data samples */#define MAX_REG_LENGTH 2 /* this says that the max length of a register is 2 bytes */Writetoreg (int);Read (int,char);char *datapointer = store;char store[NUM_SAMPLES*MAX_REG_LENGTH + 30]; void main(){/* the only pin that is programmed here from the 68HC 11 is the /CS and this is why the PC2 bit of PORTC is made asan output */char a;DDRC = 0x04; /* PC2 is an output the rest of the port bits are inputs */PORTC | = 0x04; /* make the /CS line high */ Writetoreg(0x20); /* Active Channel is Ain1(+)/Ain1(-), next operation as write to the clock register */Writetoreg(0x0C); /* master clock enabled, 4.9512MHzClock, set output rate to 50Hz*/Writetoreg(0x10); /* Active Channel is Ain1(+)/Ain1(-),next operation as write to the setup register */ Writetoreg(0x40); /* gain = 1, bipolar mode, buffer off, clear FSYNC and perform a Self Calibration*/while(PORTC & 0x10); /* wait for /DRDY to go low */for(a=0;a<NUM_SAMPLES;a++);{Writetoreg(0x38); /*set the next operation for 16 bit read from the data register */Read(NUM_SAMPES,2);}}Writetoreg(int byteword);{int q;SPCR = 0x3f;SPCR = 0X7f; /* this sets the WiredOR mode(DWOM= 1), Master mode(MSTR=1), SCK idles high(CPOL=1), /S S can be lowalways (CPHA=1), lowest clock speed(slowest speed which is master clock /32 */DDRD = 0x18; /* SCK, MOSI outputs */q = SPSR;q = SPDR; /* the read of the staus register and of thedata register is needed to clear the interrupt which tells the user that thedata transfer is complete */PORTC &= 0xfb; /* /CS is low */SPDR = byteword; /* put the byte into data register */while(!(SPSR & 0x80)); /* wait for /DRDY to go low */ PORTC |= 0x4; /* /CS high */}Read(int amount, int reglength){int q;SPCR = 0x3f;SPCR = 0x7f; /* clear the interupt */DDRD = 0x10; /* MOSI output, MISO input, SCK outpu t */while(PORTC & 0x10); /* wait for /DRDY to go low */ PORTC & 0xfb ; /* /CS is low */for(b=0;b<reglength;b++){SPDR = 0;while(!(SPSR & 0x80)); /* wait until port ready before r eading */*datapointer++=SPDR; /* read SPDR into store array vi a datapointer */}PORTC|=4; /* /CS is high */}。

TL7705

TL7700A SeriesAugust 1996SUPPLY VOLTAGE SUPERVISORS.POWER-ON RESET GENERATOR.AUTOMATIC RESET GENERATION AFTER VOLTAGEDROP.WIDE SUPPLY VOLTAGE RANGE ...3V TO 18V.PRECISION VOLTAGE SENSOR.TEMPERATURE-COMPENSATED VOLTAGE REFERENCE.TRUE AND COMPLEMENT RESET OUTPUTS .EXTERNALLY ADJUSTABLE PULSE WIDTHN MinidipDESCRIPTIONThe TL7700Aseriesaremonolithicintegratedcircuit supplyvoltagesupervisorsspecificallydesi-gnedfor use as reset controllers in microcomputer and mi-croprocessor systems.During power-up the device tests the supply voltage and keeps the RESET and RESET outputs active (high and low,respectively)as long as the supply voltage has not reached its nominal voltage value.Taking RESIN low has the same effect.To ensurethatthe microcomputersys-tem hasreset,theTL7700Athen initiatesaninternal time delaythat delays the returnof the reset outputs to theirinactivestates.Since the timedelay for most microcomputersandmicroprocessorsis in theorder of several machine cycles,the device internal time delay is determined by an external time delay is de-termined by an external capacitor connected to the C T input (pin 3).t d =1.3x 104x C TWhere :C T is in farads (F)and t d in seconds (s).In addition,when the supply voltage drops below the nominal value,the outputs will be active until the supply voltage returns to the nominal value.An ex-ternalcapacitor(typically0.1µF)mustbe connected to the REF output (pin 1)to reduce the influence of fast transients in the supply voltage.The TL7700AI series is characterized for operation from –25o C to 85o C ;the TL7700AC series is char-acterized from 0o C to 70o C.D SO8ORDERING NUMBERSTemperature RangeMinidip S080to 70o C TL77XXACP TL77XXACD -25to 85o CTL77XXAIPTL77XXAIDPIN CONNECTION (top view)1/7*TL7702A R1=0Ω,R2=open;TL7705A R1=7.8KΩ,R2=10kΩ;TL7709A R1=19.7KΩ,R2=10kΩ;TL7712A R1=32.7kΩ,R2=10kΩ;TL7715A R1=43.4KΩ,R2=10kΩ.BLOCK DIAGRAMABSOLUTE MAXIMUM RATINGSSymbol Parameter Value Unit V S Supply Voltage,V CC-(see note1)20V V i Input Voltage Range at RESIN-0.3to20VV i Input Voltage at SENSE:TL7702A(see note2)TL7705ATL7709ATL7712ATL7715A-0.3to6-0.3to10-0.3to15-0.3to20-0.3to20VI OH High-level Output Current at RESET-30mA I OL Low-level Output Current at RESET30mAT amb Operating Free-air Temperature Range:TL77XXAITL77XXAC -25to850to70o CT stg Storage Temperature Range-65to150o C Notes: 1.All voltage values are with respect to the network groun d terminal2.For the TL7700A,the voltage applied to the SENSE terminal must never exceed V s.THERMAL DATASymbol Parameter Value Unit R th j-amb Thermal Resistance Junction-ambient Max.120o C/WRECOMMENDED OPERATING CONDITIONSSymbol Parameter Min.Max.Unit V S Supply Voltage 3.618V V IH High-level Input Voltage at RESIN2V V IL Low-level Input Voltage at RESIN0.6VV i Voltage at Sense Input TL7702ATL7705ATL7709ATL7712ATL7715A 0See note310152020VI OH High-level Output Current at RESET-16mA I OL Low-level Output Current at RESET16mAT amb Operating Free-air Temperature Range TL77-AITL77-AC -258570o CNote: 3.For proper operation of the TL7702A,the voltage applied to the SENSE terminal should not exceed V s-1V or6V,which ever is less. TL7700A Series2/7ELECTRICAL CHARACTERISTICS t hese specifications unless otherwise specified,apply for:T amb=–25to85o C(TLXXAI),T amb=0to70o C(TL77XXAC)Symbol Parameter Test Conditions(1)Min.Typ.Max.Unit V OH High-level Output Voltage at RESET I OH=–16mA V s-1.5V V OL Low-Level Output Voltage at RESET I OL=16mA0.4V V ref Reference Voltage T amb=25o C 2.48 2.53 2.58VV T Threshold Voltage at SENSE Input TL7702ATL7705ATL7709ATL7712ATL7715A V s=3.6V to18VT amb=25o C2.484.57.510.613.22.534.557.610.813.52.584.67.71113.8VV T Threshold Voltage at SENSE Inpu TL7702ATL7705ATL7709ATL7712ATL7715At V s=3.6V to18V 2.454.457.410.4132.534.557.610.813.52.584.67.71113.8VV T+,V T–Hysteresis(2)at SENSE Input TL7702ATL7705ATL7709ATL7712ATL7715A V s=3.6V to18VT amb=25o C1015203545mVI I Input Current at RESIN Input V i=2.4V to V SV i=0.4V20-100µAI I Input Current at SENSE Input TL7702A V ref<V i<V s-1.5V0.52µAI OH High-level Output Current at RESET V O=18V50µAI OL Low-level Output Current at RESET V O=0V-50µAI S Supply Current All Inputs and out.open1.8 3.3mANotes: 1.All characteristics are measur ed with C=0.1µF from Pin1to GND,and with C=0.1µF from Pin3to GND.2.Hysteresis is the difference between the positive going input threshold voltage.V T+,and the negative going input thresholdvoltage,V T-.SWITCHING CHARACTERISTICSSymbol Parameter Test Conditions Min.Typ.Max.Unit t pi Pulse Width at SENSE Input V ih=V ityp+0.04x V iV iL=V ityp–0.04x V i0.9µst pi Pulse Width at RESIN Input0.4µs t po Pulse Width at Output C T=0.1µF0.65 1.3 2.6ms t pdHL Propagation Delay Time from RESINto RESETC L=100pF,V s=5V,R L=4.7kΩ1µst r/f Rise/Falltime at RESET and RESET C L=10pF,V s=5V,R L=4.7kΩ1µsTL7700A Series3/7TL7700A SeriesFigure1:Multiple Power Supply System Reset Generation Figure2:Reset Controller forµP4/7TL7700A Series SO8PACKAGE MECHANICAL DATAmm inch DIM.MIN.TYP.MAX.MIN.TYP.MAX.A 1.750.069a10.10.250.0040.010a2 1.650.065a30.650.850.0260.033b0.350.480.0140.019b10.190.250.0070.010C0.250.50.0100.020c145°(typ.)D 4.8 5.00.1890.197E 5.8 6.20.2280.244e 1.270.050e3 3.810.150F 3.8 4.00.150.157L0.4 1.270.0160.050M0.60.024S8°(max.)5/7TL7700A SeriesMINIDIP PACKAGE MECHANICAL DATAmm inch DIM.MIN.TYP.MAX.MIN.TYP.MAX.A 3.320.131a10.510.020B 1.15 1.650.0450.065b0.3560.550.0140.022 b10.2040.3040.0080.012 D10.920.430 E7.959.750.3130.384e 2.540.100e37.620.300e47.620.300F 6.60.260I 5.080.200L 3.18 3.810.1250.150 Z 1.520.0606/7TL7700A Series Information furnished is believed to be accurate and reliable.However,SGS-THOMSON Microelectronics assumes no responsibility for the consequence s of use of such information nor for any infringement of patents or other rights of third parties which may result from its use.No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.Specification mentioned in this publication are subject to change without notice.This publication supersedes and replaces all information previouslysupplied.SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systemswithout express written approval of SGS-THOMSON Microelectronics.©1996SGS-THOMSON Microelectronics–Printed in Italy–All Rights ReservedSGS-THOMSON Microelectronics GROUP OF COMPANIESAustralia-Brazil-Canada-China-France-Germany-Hong Kong-Italy-Japan-Korea-Malaysia-Malta-Morocco-The Nether-lands-Singapore-Spain-Sweden-Switzerland-Taiwan-Thailand-United Kingdom-U.S.A.7/7。

SM7015 AC DC PWM 功率开关说明书

SM7015内部功能框图HVDDEN管脚说明订购信息极限参数（注1）若无特殊说明，T A=25°C。

注1：最大输出功率受限于芯片结温，最大极限值是指超出该工作范围，芯片有可能损坏。

在极限参数范围内工作，器件功能正常，但并不完全保证满足个别性能指标。

注2：RθJA在T A=25°C自然对流下根据JEDEC JESD51热测量标准在单层导热试验板上测量。

注3：温度升高最大功耗一定会减小，这也是由T JMAX，RθJA和环境温度T A所决定的。

最大允许功耗为P D = (T JMAX-T A)/ RθJA或是极限范围给出的数值中比较低的那个值。

电气工作参数（注4、5）若无特殊说明，T A=25°C。

注4：电气工作参数定义了器件在工作范围内并且在保证特定性能指标的测试条件下的直流和交流电参数。

对于未给定上下限值的参数，该规范不予保证其精度，但其典型值合理反映了器件性能。

注5：规格书的最小、最大参数范围由测试保证，典型值由设计、测试或统计分析保证。

注6：过温保护温度为芯片内部设定温度145°C。

功能表述◆ 电路图说明上图为典型的BUCK-BOOST 电路，其中C1、C2、L1组成π型滤波，有益于改善EMI 特性，R1电阻为浪涌抑制元件，D1、D2为整流二极管，构成半波整流电路。

输出部分L2为储能电感，D3为HVDD 供电二极管，D4为续流二极管，在芯片关断期间提供输出电流通路：HVDD 4D _F 3D _F HVDD OUT V V V V V ≈-+=◆ HVDD 电压当开关电源启动后，C2电容上的电压会通过芯片内部的高压启动MOS 管向芯片HVDD 电容C3充电，当C3电容电压达到11.5V ，内部高压启动MOS 管关闭，同时PWM 开启，系统开始工作。

当C3电容电压下降到9V 以下，关闭PWM 信号，同时芯片将会产生复位信号，使系统重新启动，即是欠压保护。

控制部分通过高压MOS 的电流I D 分成两个部分，其中一部分为I S ，这部分电流为芯片采样电流。

tl7705a原理

tl7705a原理
TL7705A是一种用于电源管理的集成电路，可以广泛应用于电子设备中。

本文将从原理的角度来介绍TL7705A的工作原理和应用。

TL7705A是一种电源管理IC，它主要用于监测和控制电源电压，并提供过电流和过温度保护。

它可以在电源电压超出设定范围时进行报警或自动断电，以保护电子设备的安全运行。

TL7705A的工作原理基于反馈控制的思想。

它通过对电源电压进行采样和比较，根据比较结果来控制输出电路。

当电源电压低于设定值时，TL7705A会通过比较器产生一个低电平信号，从而触发控制电路，使输出电路断开。

当电源电压恢复到设定值以上时，TL7705A会停止产生低电平信号，输出电路恢复正常工作。

TL7705A还具有过电流和过温度保护功能。

当电流超出设定范围或温度超过限定值时，TL7705A会发出警报信号或自动断开电路，以防止电子设备损坏或发生故障。

TL7705A的应用非常广泛。

它可以用于电源管理系统中的电压监测和控制，保证电源的稳定输出。

它还可以用于电池管理系统，监测和控制电池的电压，防止电池过放或过充。

此外，TL7705A还可以用于电源逆变器和开关电源中，提供电源保护和控制。

TL7705A是一种功能强大的电源管理IC，具有电压监测、过电流保
护和过温度保护等功能。

它的工作原理基于反馈控制，可以有效地保护电子设备的安全运行。

同时，它的应用范围广泛，可以用于各种电源管理系统和电子设备中。

通过使用TL7705A，可以提高电子设备的可靠性和稳定性。

TL7705中文资料

Supply voltage SupervisorTL77xx SeriesAuthor: Eilhard HaseloffLiterature Number: SLVAE04March 1997iIMPORTANT NOTICETexas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current.TI warrants performance of its semiconductor products and related software to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements.Certain applications using semiconductor products may involve potential risks of death, personal injury, or severe property or environmental damage (“Critical Applications”).TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. Inclusion of TI products in such applications is understood to be fully at the risk of the customer. Use of TI products in such applications requires the written approval of an appropriate TI officer. Questions concerning potential risk applications should be directed to TI through a local SC sales office.In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards should be provided by the customer to minimize inherent or procedural hazards.TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Nor does TI warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used.Copyright ©1982, 1997, Texas Instruments IncorporatedContents1. Introduction (1)2. Circuit Description (2)3. Application examples (5)4. Design Tips (12)5. Summary (14)List of Figures1 Reset circuit (1)2 Functional Diagram (3)3 Diagram for Calculation of Ct (3)4 Timing diagram (4)5 TL7705A in 5 Volt Microcomputer Applications (6)6 Voltage Supervision of a multiple power supply (6)7 Typical Trigger Sensitivity at the SENSE input of the voltage monitor TL7705A (7)8 Circuit for Reduced Trigger Sensitivity (8)9 Modified Output Circuit (9)10 Circuit Diagram for Data Protection in a battery buffered memory (10)11 Typical Variation of the Reference Voltage Vref versus supply Voltage Variations (10)12 Typical Variation of the Reference Voltage Vref versus Ambient Temperature Variations (11)13 Buffered Circuit for the Reference Voltage (12)14 Printed Circuit Layout for the supply voltage supervisor (13)15 Series Resistor at the Ctinput of the TL770xB (14)Supply voltage Supervisor TL77xx Series iiiivLiterature Number: SLVAE04Supply Voltage Supervisor TL77xx SeriesABSTRACTAfter power-on a digital system must be forced into a definite initial state. For microcomputers and microprocessors a Reset input is provided to which, in simple applications, an R/C network is connected. After power-on, this circuitry maintains the logic level at this input high (or low), until the supply voltage has reached its nominal value, and the internal logic of the microcomputer has executed the Reset. However, this simple circuit does not work well under all conditions, or during short drops of the supply voltage. This applications report describes the operation and the application of the supply voltage supervisor circuits series TL77xx, which has been specially designed to solve these applications problems.1. IntroductionAfter power-on a digital system must normally be forced into a definite initial state. For microcomputers and microprocessors a reset input is provided to which, in simple applications, an R/C network is connected. After power-on, this circuitry maintains the logic level at this input high (or low), until the supply voltage has reached its nominal value, and the internal logic of the microcomputer has executed the initialization of the system.Supply voltage Supervisor TL77xx Series1Circuit Description2Literature Number: SLVAE04In larger computers several features are provided to prevent such errors: a power-fail interrupt signals dangerous conditions in time, the content of the memory is protected by a battery back-up, and so on. In small microcomputer systems this amount of effort is too expensive, and in most applications also not required. It is usually sufficient if, after a serious voltage drop, the microcomputer is forced into a defined initial condition. To implement this function, whilst preventing the problems mentioned above, the following circuit features are required:− Accurate detection of a serious voltage drop.− Generation of a reset signal while as the supply voltage is not in the operationalrange, to prevent undefined operations of the microcomputer.− Maintenance of the reset signal for a certain time after the supply voltage hasreturned to its nominal value, to ensure proper initialization of the circuit.For these applications, Texas Instruments has developed a series of integrated circuits which, with a minimum of external components and without additional adjustment, will fulfill the requirements described above.2. Circuit DescriptionThe main part of this circuit is a reference voltage source, which consists of a very stable, temperature-compensated band gap reference. An external capacitor (typ. 0.1 µF) must be connected to the voltage output V ref , to reduce the influence of fast transients in the supply voltage. The voltage at the SENSE input is divided by a resistor divider and compared with the reference voltage by a comparator. To achieve high accuracy, this divider is adjusted at wafer probe. When the input voltage is sensed to be lower than the threshold voltage, the thyristor is triggered, which discharges the timing capacitor C t . It is also possible to fire the thyristor via the RESIN input by a logic level (TTL level, active low). The thyristor is turned off again when either the voltage at the SENSE input (or RESIN input) increases beyond the threshold, or - during short supply voltage drops - the discharge current of the capacitor becomes lower than the hold current of the thyristor.Thereafter, the capacitor is recharged by a current source 100 µA, the charge time being calculated as follows:t C d t =⋅⋅13104. C t in F, t in sThe magnitude of charge current and therefore also the delay t d time is determined by the tolerance of the resistors in the integrated circuit. These tolerances, caused by the semiconductor manufacturing process,are not negligible. Therefore the delay time may vary -50 % to +100 %. However, for the applications discussed here this will not be a restriction. The diagram in figure 3 shows the typical delay time t d versus the capacitance of the external capacitor C t .Circuit DescriptionSupply voltage Supervisor TL77xx Series3 Note:R1typR2typTL77020∞TL77059.0 kΩ10.0 kΩTL770920.4 kΩ10.0 kΩTL771235.6 kΩ10.0 kΩTL771546.8 kΩ10.0 kΩFigure 2. Functional DiagramFigure 3. Diagram for Calculation of CtCircuit Description4Literature Number: SLVAE04An additional comparator compares the voltage at the capacitor with the reference voltage and forces the outputs into the active state as long as the voltage at the capacitor is lower than the reference voltage.Figure 4 shows the timing of the various signals. In this example the SENSE input is connected to the supply voltage V cc as in typical applications of this device. The minimum supply voltage for which the function of this device is guaranteed is 3.6 V. After power-on the outputs are undefined until the minimum supply voltage V res is reached. For the TL77xxA the minimum supply voltage is V res = 3.0 V (typical 2.5 V),for the TL77xxB is V res = 1.0 V. Also, when using the TL77xxB it has to be noted, that with such low supply voltages the function of the reset input of the following circuit may not be guaranteed.Beyond the voltage V res the capacitor C t is first kept discharged, and the outputs stay in the active state(RESET = High, RESET = Low). When the input voltage becomes higher than the threshold voltage V t , the thyristor is turned off and the capacitor is charged. After a delay, t d , the voltage at the capacitor passes the trigger level of the output comparator and the outputs become inactive. The circuit to beinitialized is now set to a defined state and starts the correct operation.Application examplesSupply voltage Supervisor TL77xx Series 5power-on, short voltage fluctuations do not repetitively reset the system. Delay times of 10 to 20 ms or even up to 500 ms will usually avoid these problems. Owing to an internal limitation of discharge current of the timing capacitor C t , there is no upper limit for the size of this capacitor.3. Application examplesFive versions of this circuit are available:− TL7705A, TL7705B (V t = 4.55 V): Application in TTL-systems and micro-computer systems which require a 5 volt supply (e.g. TMS7000)− TL7709A (V t = 7.6 V): Application in microcomputer systems using the TMS1XXXNLL.− TL7712A (V t = 10.8 V): Application in CMOS, microprocessor, and memory circuits with a 12 volt supply.− TL7715A (V t = 13.5 V): Application in circuits which operate with a supply voltage of 15 V, as is found often in analog circuits.− TL7702A, TL7702B (V t = 2.5 V): Application in systems where other supply voltages are used. The required trigger level my be adjusted with an externalresistor divider at the SENSE input.Since for most applications the circuits are already adjusted to the appropriate voltage levels, these devices are easy to use. Figure 5 shows the initialization circuit diagrams for TMS7000 microcomputer system with supply voltage V cc = 5 V. The external components required are the decoupling capacitor C ref for the reference voltage and the timing capacitor C t . The outputs of the TL77xx are open collector outputs.In figure 5 therefore a pull-up resistor is shown at the RESET output to ensure the correct High level.Application examples6Literature Number: SLVAE04Figure 6. Voltage Supervision of a multiple power supplyIn larger systems, where several supply voltages are required, it is necessary to supervise all supplyvoltages which may cause dangerous conditions in case of power failure. In the circuit diagram of figure 6, two TL7712A's are used to monitor the positive and the negative 12 volt supplies. Their outputs are fed to the RESIN input of the TL7705A, which monitors the 5 volt supply. The output of this device provides a reset signal, which becomes active whenever any one of the three supply voltages fails. A reset signal can be generated manually via a switch which is connected to the voltage monitor of the positive 12 V supply. When designing a supply voltage monitor the designer has to take care, that when only one of the supply voltages becomes marginal or fails, a defined reset signal is generated (at least if the main supply voltage 5 V is still available). Therefore the circuit which monitors the 12 V supply voltage is supplied by the 5 V supply. The reset signal of the circuit which monitors the negative supply is fed via a resistor divider to the base of the transistor BC546, which controls the RESIN input of the TL7705A. The voltage divider is designed so that a reset is generated even if the negative supply fails totally.The capacitor which determines the delay of the two circuits which monitors the both 12 v supplies, can be chosen short (in the example shown here it is 0.01µF). The output of these circuits has only to trigger the third monitor TL7705A. The final duration of the reset signal will be determined by the capacitor Ctof the last mentioned circuit.These supply voltage supervisor circuits were designed to detect supply voltage drops as short as>300 ns. In figure 7 the minimum pulse width td minat the SENSE input is shown versus the amplitude of theApplication examplessupply voltage drop ∆V cc which is required to trigger the voltage monitor. The sensitivity of the other circuits (TL7702, TL7712 etc.) can be calculated as proportional to the trigger voltage ratio.-2 V-1,8 V-1,6 V-1,4 V-1,2 V-1 V-0,8 V-0,6 V-0,4 V-0,2 VFigure 7. Typical Trigger Sensitivity at the SENSE input of thevoltage monitor TL7705AApplication examplesIn applications where this performance is not required, sensitivity can be reduced by placing an R-C filter infront of SENSE input. To avoid a unacceptable change of the threshold voltage of circuits with a fixed threshold voltage (TL7705, TL7709, TL7712, TL7715) the value of the resistor should be a few 10Ω only. In application like this it may be better to use the TL7702A. With this circuit the threshold voltage can beset to the desired value by a high impedance voltage monitor. A small filter capacitor Cfat the SENSEinput reduces the trigger sensitivity (figure 8).In some applications it is necessary to keep the output of the reset circuit active even if no supply voltageis applied. Under normal conditions the output transistor of the TL77xxA is turned off (inactive state), whenthe supply voltage is lower than 3 V (Vcc> 1 V for the TL77xxB). In figure 9 a P-channel field effecttransistor is connected to the RESET output. This transistor conducts when the supply voltage drops below3 V i.e. at a gate source voltage of -3 V or less. To ensure that the transistor is switched off when thesupply voltage has reached the nominal value, the gate has to be at least 6 V more positive than thesource (or the required high level e.g. 2.4 V). In figure 9 therefore the voltage monitor is supplied by supplyvoltage of 12 V. Since the requirements for th is supply voltage in terms of stability are not high, this supplyvoltage for example can be taken from the filter capacitor in front of the voltage regulator in the powersupply.Figure 9. Modified Output CircuitA further application for these integrated circuits is in battery-buffered memory systems. When the linevoltage fails, the content of the memory must not be corrupted by a random write operation of themicrocomputer. These uncontrolled write operations may take place at low supply voltage even if a resetsignal is applied to the processor. Generally, it is sufficient to switch the chip select line into the inactivestate (some memories require that the write line also be disabled). A switch, which consists of transistor Q1 and diode D1, is inserted into the chip select line of the memory. Under normal operation (line voltagepresent) the output of the TL7705B is turned off (high); the transistor Q1draws its base current fromtransistor Q2 and resistor R1. When the chip select line is switched from high to low by the supervisingmicroprocessor, the transistor conducts and the CS input of the memory goes low and the memory is enabled. Because of the small DC load of the resistor R2, the saturation voltage of the transistor (andApplication examples therefore the shift of the low level at the CS input) is very small (typ. 40 mV). When the chip select line isis turned off (the influence of the inverse current switched high again by the processor, the transistor Q1conducts and charges the circuit capacitance. In the case of a power-gain is negligible); the diode D1failure the TL7705B is triggered and its RESET output becomes low. The base of transistor Qcan no1longer draw current. Thus the CS input of the memory is separated from the chip select line.Application examplesFigure 11. Typical Variation of the Reference Voltage V ref versus supply Voltage VariationsAs has already been mentioned the supply voltage supervisors of the series TL77xxA incorporate extremely stable reference voltage source which can be accessed at the V ref terminal. This voltage source can also be used when in other applications a constant voltage source is required. As shown in picture 11,the reference voltage V ref varies less than 10 mV, when the supply voltage is changed from 3.5 … 18 V.The same stability of the reference voltage is maintained, when the ambient temperature is changed.Figure 12 shows the typical characteristic. The references voltage varies only 16 mV, when the ambient temperature is changed from -40 … 85 °C.2,506 V2,508 V2,51 V2,512 V2,514 V2,516 V2,518 V2,52 V2,522 V-40-20020406080100V refT a /°CFigure 12. Typical Variation of the Reference Voltage V ref versus Ambient Temperature VariationsWhen using the integrated reference voltage to supply other circuits, the designer has to consider that maximum current available from this voltage source is in the order of 100 µA only. With higher loads, the stability of the reference voltage suffers. For higher currents a buffer in the form of an operational amplifier connected as an emitter follower is recommended (figure 13). If the voltage monitor section of the circuit is not used in this application, the capacitor C t is not required. This terminal may then be left open. The inputs SENSE and RESIN are connected to ground.Design TipsDesign TipsSummary。

电源监控芯片TL7705AIDR_PDF_C53106_2015-07-13

ProductFolderSample &BuyTechnical Documents Tools &SoftwareSupport &CommunityTL7702A,TL7705A,TL7709A,TL7712A,TL7715ASLVS028J –APRIL 1983–REVISED JANUARY 2015TL77xxA Supply-Voltage Supervisors1Features3DescriptionThe TL77xxA family of integrated-circuit supply-•Power-On Reset Generatorvoltage supervisors is designed specifically for use as •Automatic Reset Generation After Voltage Drop reset controllers in microcomputer and •Wide Supply-Voltage Range microprocessor systems.The supply-voltage supervisor monitors the supply for undervoltage •Precision Voltage Sensorconditions at the SENSE input.During power up,the •Temperature-Compensated Voltage Reference output becomes active (low)when V CC •Externally Adjustable Pulse Durationattains a value approaching 3.6V.At this point (assuming that SENSE is above V IT+),the delay timer 2Applicationsfunction activates a time delay,after which outputs and RESET go inactive (high and low,•Computers respectively).When an undervoltage condition occurs •Tabletsduring normal operation,and RESET go •Smart Phones active.•ServersDevice Information (1)•Music PlayersPART NUMBER PACKAGE BODY SIZE (NOM)SOIC (8) 4.90mm ×3.91mm TL77xxAPDIP (8)9.81mm ×6.35mm(1)For all available packages,see the orderable addendum atthe end of the datasheet.4Three-Supply MonitoringTL7702A,TL7705A,TL7709A,TL7712A,TL7715ASLVS028J–APRIL1983–REVISED Table of Contents9.2Functional Block Diagram (8)1Features (1)9.3Feature Description (9)2Applications (1)9.4Device Functional Modes (9)3Description (1)10Application and Implementation (10)4Three-Supply Monitoring (1)10.1Application Information (10)5Revision History (2)10.2Typical Application (10)6Pin Configuration and Functions (3)10.3System Examples (12)7Specifications (4)11Power Supply Recommendations (14)7.1Absolute Maximum Ratings (4)12Layout (14)7.2ESD Ratings (4)12.1Layout Guidelines (14)7.3Recommended Operating Conditions (4)12.2Layout Example (14)7.4Thermal Information (5)13Device and Documentation Support (15)7.5Electrical Characteristics (5)13.1Related Links (15)7.6Switching Characteristics (6)13.2Trademarks (15)7.7Typical Characteristics (6)13.3Electrostatic Discharge Caution (15)8Parameter Measurement Information (7)13.4Glossary (15)9Detailed Description (8)14Mechanical,Packaging,and Orderable9.1Overview (8)Information (16)5Revision HistoryChanges from Revision I(July2009)to Revision J Page •Added Applications,Device Information table,Pin Functions table,ESD Ratings table,Thermal Information table, Typical Characteristics,Feature Description section,Device Functional Modes,Application and Implementationsection,Power Supply Recommendations section,Layout section,Device and Documentation Support section,and Mechanical,Packaging,and Orderable Information section (1)•Deleted Ordering Information table (1)2Submit Documentation Feedback Copyright©1983–2015,Texas Instruments IncorporatedTL7702A,TL7705A,TL7709A,TL7712A,TL7715A SLVS028J–APRIL1983–REVISED JANUARY20156Pin Configuration and FunctionsPin FunctionsPINTYPE DESCRIPTIONNAME NO.CT3I/O External timing-capacitor pinGND4—Device groundREF1O Voltage reference outputRESET6O Supervisor reset signal outputRESET5O Supervisor reset signal output(inverted)RESIN2I Reset inputSENSE7I Sense inputV CC8—Power SupplyCopyright©1983–2015,Texas Instruments Incorporated Submit Documentation Feedback3TL7702A,TL7705A,TL7709A,TL7712A,TL7715ASLVS028J–APRIL1983–REVISED 7Specifications7.1Absolute Maximum Ratingsover operating free-air temperature range(unless otherwise noted)(1)MIN MAX UNITV CC Supply Voltage(2)20VV I Input Voltage Range,RESIN–0.320VTL7702A(3)–0.36VTL7705A–0.320VV I Input Voltage Range SENSETL7709A–0.320VTL7712A,TL7715A–0.320VI OH High-level output current,I OH,RESET–30mAI OL Low-level output current,I OL,RESET30mAT J Operating virtual junction temperature150°CT stg Storage temperature range–65150°C(1)Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.These are stress ratingsonly,which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions.Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.(2)For proper operation of the TL7702A,the voltage applied to the SENSE terminal should not exceed V CC−1V or6V,whichever is less(3)All voltage values are with respect to GND.7.2ESD RatingsVALUE UNITHuman body model(HBM),per ANSI/ESDA/JEDEC JS-001,all pins(1)1000V(ESD)Electrostatic discharge VCharged device model(CDM),per JEDEC specification JESD22-C101,1000all pins(2)(1)JEDEC document JEP155states that500-V HBM allows safe manufacturing with a standard ESD control process.(2)JEDEC document JEP157states that250-V CDM allows safe manufacturing with a standard ESD control process.7.3Recommended Operating Conditionsover operating free-air temperature range(unless otherwise noted)MIN MAX UNITV CC Supply Voltage 3.518VV IH High-level input voltage at RESIN2VV IL Low-level input voltage at RESIN0.6VTL7702A0See(1)TL7705A010V I Input voltage,SENSE TL7709A015VTL7712A020TL7715A020I OH High-level output current,RESET–16mAI OL Low-level output current,RESET16mATL77xxAC070T A Operating free-air temperature°CTL77xxAI–4085(1)For proper operation of the TL7702A,the voltage applied to the SENSE terminal should not exceed V CC−1V or6V,whichever is less. 4Submit Documentation Feedback Copyright©1983–2015,Texas Instruments IncorporatedTL7702A,TL7705A,TL7709A,TL7712A,TL7715A SLVS028J–APRIL1983–REVISED JANUARY20157.4Thermal InformationTL77xxATHERMAL METRIC(1)D P PS UNIT8PINS8PINS8PINSRθJA Junction-to-ambient thermal resistance978595°C/W (1)For more information about traditional and new thermal metrics,see the IC Package Thermal Metrics application report,SPRA953.7.5Electrical Characteristicsover operating free-air temperature range(unless otherwise noted)TL77xxACTL77xxAIPARAMETER TEST CONDITIONS(1)UNITMIN TYP MAXV OH High-level output voltage,RESET I OH=–16mA V CC–1.5VV OL Low-level output voltage,RESET I OL=16mA0.4VV ref Reference Voltage T A=25°C 2.48 2.53 2.58VTL7702A 2.48 2.53 2.58TL7705A 4.5 4.55 4.6Negative-going inputV IT–TL7709A T A=25°C7.57.67.7V threshold voltage,SENSETL7712A10.610.811TL7715A13.213.513.8TL7702A10TL7705A15Hysteresis,SENS(V IT+–V hys TL7709A T A=25°C20mV V IT–)TL7712A35TL7715A45V I=2.4V to V CC20RESINI I Input current V I=0.4V–100µASENSE TL7702A V ref<V I<V CC–1.5V0.52I OH High-level output current,RESET V O=18V50µAI OL Low-level output current,RESET V O=0–50µAI CC Supply current All inputs and outputs open 1.83mA(1)All electrical characteristics are measured with0.1-µF capacitors connected at REF,CT,and V CC to GND. Array Figure1.Timing DiagramCopyright©1983–2015,Texas Instruments Incorporated Submit Documentation Feedback5TL7702A,TL7705A,TL7709A,TL7712A,TL7715ASLVS028J–APRIL1983–REVISED 7.6Switching Characteristicsover operating free-air temperature range(unless otherwise noted)TL77xxACTL77xxAIPARAMETER TEST CONDITIONS(1)UNITMIN TYP MAX Output pulse duration CT=0.1µF0.65 1.2 2.6msecInput pulse duration at RESIN0.4µsPulse duration at sense input to switch V IH=V IT−+200mV,V IL=V IT−−200t w(S)2µs outputs mVt pd propagation delay time,RESIN to RESET V CC=5V1µsRESET0.2t r Rise time V CC=5V(2)µsRESET 3.5RESET 3.5t f Fall time V CC=5V(2)µsRESET0.2(1)All switching characteristics are measured with0.1-µF capacitors connected at REF and V CC to GND.(2)The rise and fall times are measured with a4.7-kΩload resistor at RESET and7.7Typical Characteristics6Submit Documentation Feedback Copyright©1983–2015,Texas Instruments IncorporatedTL7702A,TL7705A,TL7709A,TL7712A,TL7715A SLVS028J–APRIL1983–REVISED JANUARY20158Parameter Measurement InformationFigure6.Voltage WaveformCopyright©1983–2015,Texas Instruments Incorporated Submit Documentation Feedback7TL7702A,TL7705A,TL7709A,TL7712A,TL7715ASLVS028J–APRIL1983–REVISED 9Detailed Description9.1OverviewThe TL77xxA family of integrated-circuit supply-voltage supervisors is designed specifically for use as reset controllers in microcomputer and microprocessor systems.The supply-voltage supervisor monitors the supply for undervoltage conditions at the SENSE input.During power up,the output becomes active(low)when V CC attains a value approaching3.6V.At this point(assuming that SENSE is above V IT+),the delay timer function activates a time delay,after which outputs and RESET go inactive(high and low,respectively). When an undervoltage condition occurs during normal operation,RESET and RESET go active.To ensure that a complete reset occurs,the reset outputs remain active for a time delay after the voltage at the SENSE input exceeds the positive-going threshold value.During power down and when SENSE is below V IT−,the outputs remain active until V CC falls below2V.After this,the outputs are undefined.An external capacitor(typically0.1μF)must be connected to REF to reduce the influence of fast transients in the supply voltage.Five versions of this circuit are available:•TL7705A(Vt=4.55V):Application in TTL-systems and microcomputer systems which require a5volt supply(e.g.TMS7000)•TL7709A(Vt=7.6V):Application in microcomputer systems using the TMS1XXXNLL•TL7712A(Vt=10.8V):Application in CMOS,microprocessor,and memory circuits with a12volt supply.•TL7715A(Vt=13.5V):Application in circuits which operate with a supply voltage of15V,as is found often in analog circuits.•TL7702A(Vt=2.5V):Application in systems where other supply voltages are used.The required trigger level my be adjusted with an external resistor divider at the SENSE input.9.2Functional Block DiagramThe functional block diagram is shown for illustrative purposes only;the actual circuit includes a trimming network to adjust the reference voltage and sense-comparator trip point.A.TL7702A:R1=0Ω,R2=openTL7705A:R1=7.8kΩ,R2=10kΩTL7709A:R1=19.7kΩ,R2=10kΩTL7712A:R1=32.7kΩ,R2=10kΩTL7715A:R1=43.4kΩ,R2=10kΩB.Resistor values shown are nominal.8Submit Documentation Feedback Copyright©1983–2015,Texas Instruments IncorporatedTL7702A,TL7705A,TL7709A,TL7712A,TL7715A SLVS028J–APRIL1983–REVISED JANUARY20159.3Feature Description9.3.1Wide Supply-Voltage RangeTh TL77xxA family operates of a wide supply voltage range of3.5V to18V.9.3.2Externally Adjustable Pulse DurationThe time delay is determined by the value of the external capacitor C T:t d=1.3×104×C T,where C T is in farads(F)and t d is in seconds(s).9.3.3Temperature-Compensated Voltage ReferenceThe series TL77xxA incorporates an extremely stable reference voltage source.This voltage source can also be used in applications where a constant voltage source is required.The reference voltage varies less than10mV over the supply voltage range of3.5V to18V.The same stability of the reference voltage is maintained,when the ambient temperature is changed.The reference's voltage varies only16mV when the ambient temperature is changed from-40°C to85°C.9.4Device Functional ModesFigure7shows the timing of the various signals.In this example the SENSE input is connected to the supply voltage V CC as in typical applications of this device.The minimum supply voltage for which the function of this device is guaranteed is3.6V.After power-on,the outputs are undefined until the minimum supply voltage V res is reached.For the TL77xxA the minimum supply voltage is Vres=3.0V(typical2.5V).Beyond the voltage V res the capacitor C T is first kept discharged,and the outputs stay in the active state(RESET=High,=Low). When the input voltage becomes higher than the threshold voltage V t,the thyristor is turned off and the capacitor is charged.After a delay,t d,the voltage at the capacitor passes the trigger level of the output comparator and the outputs become inactive.The circuit to be initialized is now set to a defined state and starts the correct operation.A.Note:SENSE Input connected to V CCFigure7.Timing DiagramCopyright©1983–2015,Texas Instruments Incorporated Submit Documentation Feedback9=TL7702A,TL7705A,TL7709A,TL7712A,TL7715ASLVS028J –APRIL 1983–REVISED JANUARY 201510Application and ImplementationNOTEInformation in the following applications sections is not part of the TI component specification,and TI does not warrant its accuracy or completeness.TI’s customers are responsible for determining suitability of components for their purposes.Customers should validate and test their design implementation to confirm system functionality.10.1Application InformationThis application shows the initialization circuit diagrams for a microprocessor system with supply voltage Vcc =5V.The external components required are the decoupling capacitor C ref for the reference voltage and the timing capacitor C T .The outputs of the TL77xxA are open collector outputs.In Figure 8therefore a pull-up resistor is shown at the output to ensure the correct HIGH level.10.2Typical ApplicationFigure 8.Reset Controller Schematic for a Microprocessor10.2.1Design Requirements•5-V microprocessor supply voltage •t d =1.3ms10.2.2Detailed Design Procedure•Select reasonable values for pull-up/pull-down resistors for RESET and RESET.This design will use 10k Ω.•Choose C T =0.1µF to achieve t d =1.3ms•This design will use only the active-low reset output because the example microcontroller resets when the input is Low.10Submit Documentation Feedback Copyright ©1983–2015,Texas Instruments IncorporatedTL7702A,TL7705A,TL7709A,TL7712A,TL7715A SLVS028J–APRIL1983–REVISED JANUARY2015Typical Application(continued)10.2.3Application CurvesCopyright©1983–2015,Texas Instruments Incorporated Submit Documentation Feedback11TL7702A,TL7705A,TL7709A,TL7712A,TL7715ASLVS028J–APRIL1983–REVISED 10.3System ExamplesFigure13.Multi Power-Supply System Reset Generation SchematicFigure14.Eliminating Undefined States Using a P-Channel JFET Schematic12Submit Documentation Feedback Copyright©1983–2015,Texas Instruments IncorporatedTL7702A,TL7705A,TL7709A,TL7712A,TL7715A SLVS028J–APRIL1983–REVISED JANUARY2015System Examples(continued)Figure15.Eliminating Undefined States Using PNP Transistor SchematicCopyright©1983–2015,Texas Instruments Incorporated Submit Documentation Feedback131 2 3 48 7 6 5TL7702A,TL7705A,TL7709A,TL7712A,TL7715ASLVS028J–APRIL1983–REVISED 11Power Supply RecommendationsThe TL77xxA devices will operate within the above specifications between3.5V and18V.These devices will risk being damaged when powered by more than20V.12Layout12.1Layout GuidelinesThe voltage monitor should be placed on the printed circuit board,where there are no neighboring circuits in the which switch high currents(like bus interface circuits and power switches).When laying out the layout of the printed circuit board special care should taken with the interconnects which carry analog signals.Beside the SENSE input these are the C T and V ref terminals.Noise coupled into the C T input will lead to a reduction of the output pulse width.Noise coupled into the V ref input or into the filter capacitor at this input may lead to undesired triggering of the circuit and by this to an undesired RESET pulse.Practice shows,that this malfunction when high currents flow over the interconnects of these capacitors to the GND terminal of the voltage monitor.To avoid these effects,the GND terminals of these capacitors must be connected by the shortest way to the GND terminal of the voltage monitor in so that no currents caused by other circuits flow over these wires.Figure16show a layout proposal for the printed circuit board.Furthermore the resistors of the voltage divider at the SENSE input of the TL7702(R2and R3in Figure16)have to be placed in so,that no noise may be coupled into this circuit. 12.2Layout ExampleFigure16.Printed Circuit Layout for the Supply Voltage Supervisor14Submit Documentation Feedback Copyright©1983–2015,Texas Instruments IncorporatedTL7702A,TL7705A,TL7709A,TL7712A,TL7715A SLVS028J–APRIL1983–REVISED JANUARY201513Device and Documentation Support13.1Related LinksThe table below lists quick access links.Categories include technical documents,support and community resources,tools and software,and quick access to sample or buy.Table1.Related LinksTECHNICAL TOOLS&SUPPORT& PARTS PRODUCT FOLDER SAMPLE&BUYDOCUMENTS SOFTWARE COMMUNITY TL7702A Click here Click here Click here Click here Click here TL7705A Click here Click here Click here Click here Click here TL7709A Click here Click here Click here Click here Click here TL7712A Click here Click here Click here Click here Click here TL7715A Click here Click here Click here Click here Click here 13.2TrademarksAll trademarks are the property of their respective owners.13.3Electrostatic Discharge CautionThese devices have limited built-in ESD protection.The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.13.4GlossarySLYZ022—TI Glossary.This glossary lists and explains terms,acronyms,and definitions.Copyright©1983–2015,Texas Instruments Incorporated Submit Documentation Feedback15TL7702A,TL7705A,TL7709A,TL7712A,TL7715ASLVS028J–APRIL1983–REVISED 14Mechanical,Packaging,and Orderable InformationThe following pages include mechanical,packaging,and orderable information.This information is the most current data available for the designated devices.This data is subject to change without notice and revision of this document.For browser-based versions of this data sheet,refer to the left-hand navigation.16Submit Documentation Feedback Copyright©1983–2015,Texas Instruments IncorporatedPACKAGING INFORMATIONAddendum-Page 1Addendum-Page 2Addendum-Page 3(1) The marketing status values are defined as follows:ACTIVE: Product device recommended for new designs.LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.PREVIEW: Device has been announced but is not in production. Samples may or may not be available.OBSOLETE: TI has discontinued the production of the device.(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check /productcontent for the latest availability information and additional product content details.TBD: The Pb-Free/Green conversion plan has not been defined.Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device.(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width.Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.Addendum-Page 4PACKAGE OPTION ADDENDUM28-Oct-2014 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.Addendum-Page 5TAPE AND REELINFORMATION *All dimensionsare nominal Device Package Type Package DrawingPinsSPQ Reel Diameter (mm)Reel Width W1(mm)A0(mm)B0(mm)K0(mm)P1(mm)W (mm)Pin1Quadrant TL7702ACDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7702ACDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7702AIDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7705ACDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7705ACPSR SOPS 82000330.016.48.2 6.6 2.512.016.0Q1TL7705AIDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7709ACDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7712ACDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7712AIDR SOIC D 82500330.012.4 6.4 5.2 28-Oct-2014*Alldimensions are nominal DevicePackage Type Package Drawing Pins SPQ Length (mm)Width (mm)Height (mm)TL7702ACDRSOIC D 82500340.5338.120.6TL7702ACDRSOIC D 82500367.0367.035.0TL7702AIDRSOIC D 82500340.5338.120.6TL7705ACDRSOIC D 82500340.5338.120.6TL7705ACPSRSO PS 82000367.0367.038.0TL7705AIDRSOIC D 82500340.5338.120.6TL7709ACDRSOIC D 82500340.5338.120.6TL7712ACDRSOIC D 82500340.5338.120.6TL7712AIDR SOIC D 82500340.5338.120.6 28-Oct-2014IMPORTANT NOTICETexas Instruments Incorporated and its subsidiaries(TI)reserve the right to make corrections,enhancements,improvements and other changes to its semiconductor products and services per JESD46,latest issue,and to discontinue any product or service per JESD48,latest issue.Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.All semiconductor products(also referred to herein as“components”)are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.TI warrants performance of its components to the specifications applicable at the time of sale,in accordance with the warranty in TI’s terms and conditions of sale of semiconductor products.Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty.Except where mandated by applicable law,testing of all parameters of each component is not necessarily performed.TI assumes no liability for applications assistance or the design of Buyers’products.Buyers are responsible for their products and applications using TI components.To minimize the risks associated with Buyers’products and applications,Buyers should provide adequate design and operating safeguards.TI does not warrant or represent that any license,either express or implied,is granted under any patent right,copyright,mask work right,or other intellectual property right relating to any combination,machine,or process in which TI components or services are rmation published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or endorsement e of such information may require a license from a third party under the patents or other intellectual property of the third party,or a license from TI under the patents or other intellectual property of TI.Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties,conditions,limitations,and notices.TI is not responsible or liable for such altered rmation of third parties may be subject to additional restrictions.Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice. 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复位芯片7705ac

PACKAGING INFORMATIONOrderable Device Status(1)PackageType PackageDrawingPins PackageQtyEco Plan(2)Lead/Ball Finish MSL Peak Temp(3)5962-88685012A OBSOLETE LCCC FK20TBD Call TI Call TI TL7702ACD ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702ACDE4ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702ACDG4ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702ACDR ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702ACDRE4ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702ACDRG4ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702ACP ACTIVE PDIP P850Pb-Free(RoHS)CU NIPDAU N/A for Pkg TypeTL7702ACPE4ACTIVE PDIP P850Pb-Free(RoHS)CU NIPDAU N/A for Pkg TypeTL7702AID ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702AIDE4ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702AIDG4ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702AIDR ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702AIDRE4ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702AIDRG4ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7702AIP ACTIVE PDIP P850Pb-Free(RoHS)CU NIPDAU N/A for Pkg TypeTL7702AIPE4ACTIVE PDIP P850Pb-Free(RoHS)CU NIPDAU N/A for Pkg Type TL7702AMFKB OBSOLETE LCCC FK20TBD Call TI Call TITL7702AMJG OBSOLETE CDIP JG8TBD Call TI Call TITL7702AMJGB OBSOLETE CDIP JG8TBD Call TI Call TITL7705ACD ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705ACDE4ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705ACDG4ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705ACDR ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705ACDRE4ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705ACDRG4ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705ACP ACTIVE PDIP P850Pb-Free CU NIPDAU N/A for Pkg TypeOrderable Device Status(1)PackageType PackageDrawingPins PackageQtyEco Plan(2)Lead/Ball Finish MSL Peak Temp(3)(RoHS)TL7705ACPE4ACTIVE PDIP P850Pb-Free(RoHS)CU NIPDAU N/A for Pkg TypeTL7705ACPSLE OBSOLETE SO PS8TBD Call TI Call TITL7705ACPSR ACTIVE SO PS82000Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705ACPSRE4ACTIVE SO PS82000Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705AID ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705AIDE4ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705AIDG4ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705AIDR ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705AIDRE4ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705AIDRG4ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7705AIP ACTIVE PDIP P850Pb-Free(RoHS)CU NIPDAU N/A for Pkg TypeTL7705AIPE4ACTIVE PDIP P850Pb-Free(RoHS)CU NIPDAU N/A for Pkg Type TL7705AMFKB OBSOLETE LCCC FK20TBD Call TI Call TITL7705AMJG OBSOLETE CDIP JG8TBD Call TI Call TITL7705AMJGB OBSOLETE CDIP JG8TBD Call TI Call TITL7709ACD ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7709ACDE4ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7709ACDR ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7709ACDRE4ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7709ACP ACTIVE PDIP P850Pb-Free(RoHS)CU NIPDAU N/A for Pkg TypeTL7709ACPE4ACTIVE PDIP P850Pb-Free(RoHS)CU NIPDAU N/A for Pkg Type TL7709AID OBSOLETE SOIC D8TBD Call TI Call TITL7709AIP OBSOLETE PDIP P8TBD Call TI Call TITL7712ACD ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7712ACDE4ACTIVE SOIC D875Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7712ACDR ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIMTL7712ACDRE4ACTIVE SOIC D82500Green(RoHS&no Sb/Br)CU NIPDAU Level-1-260C-UNLIM TL7712ACP ACTIVE PDIP P850Pb-Free CU NIPDAU N/A for Pkg TypeOrderable Device Status (1)PackageTypePackage Drawing Pins Package Qty Eco Plan (2)Lead/Ball Finish MSL Peak Temp (3)(RoHS)TL7712ACPE4ACTIVE PDIPP 850Pb-Free (RoHS)CU NIPDAU N /A for Pkg Type TL7712AID OBSOLETE SOICD 8TBD Call TI Call TI TL7712AIP OBSOLETE PDIPP 8TBD Call TI Call TI TL7715ACD ACTIVE SOICD 875Green (RoHS &no Sb/Br)CU NIPDAU Level-1-260C-UNLIM TL7715ACDE4ACTIVE SOICD 875Green (RoHS &no Sb/Br)CU NIPDAU Level-1-260C-UNLIM TL7715ACP ACTIVE PDIPP 850Pb-Free (RoHS)CU NIPDAU N /A for Pkg Type TL7715ACPE4ACTIVE PDIPP 850Pb-Free (RoHS)CU NIPDAU N /A for Pkg Type TL7715AID OBSOLETE SOICD 8TBD Call TI Call TI TL7715AIPOBSOLETE PDIP P 8TBD Call TI Call TI (1)The marketing status values are defined as follows:ACTIVE:Product device recommended for new designs.LIFEBUY:TI has announced that the device will be discontinued,and a lifetime-buy period is in effect.NRND:Not recommended for new designs.Device is in production to support existing customers,but TI does not recommend using this part in a new design.PREVIEW:Device has been announced but is not in production.Samples may or may not be available.OBSOLETE:TI has discontinued the production of the device.(2)Eco Plan -The planned eco-friendly classification:Pb-Free (RoHS),Pb-Free (RoHS Exempt),or Green (RoHS &no Sb/Br)-please check /productcontent for the latest availability information and additional product content details.TBD:The Pb-Free/Green conversion plan has not been defined.Pb-Free (RoHS):TI's terms "Lead-Free"or "Pb-Free"mean semiconductor products that are compatible with the current RoHS requirements for all 6substances,including the requirement that lead not exceed 0.1%by weight in homogeneous materials.Where designed to be soldered at high temperatures,TI Pb-Free products are suitable for use in specified lead-free processes.Pb-Free (RoHS Exempt):This component has a RoHS exemption for either 1)lead-based flip-chip solderbumps used between the die and package,or 2)lead-based die adhesive used between the die and leadframe.The component is otherwise considered Pb-Free (RoHS compatible)as defined above.Green (RoHS &no Sb/Br):TI defines "Green"to mean Pb-Free (RoHS compatible),and free of Bromine (Br)and Antimony (Sb)based flame retardants (Br or Sb do not exceed 0.1%by weight in homogeneous material)(3)MSL,Peak Temp.--The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications,and peak solder temperature.Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.TI bases its knowledge and belief on information provided by third parties,and makes no representation or warranty as to the accuracy of such information.Efforts are underway to better integrate information from third parties.TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.TI and TI suppliers consider certain information to be proprietary,and thus CAS numbers and other limited information may not be available for release.In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s)at issue in this document sold by TI to Customer on an annual basis.PACKAGE OPTION ADDENDUM 31-Oct-2006Addendum-Page 3IMPORTANT NOTICETexas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. T esting and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed.TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. T o minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards.TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI.Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation.Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. 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TM7705

一、概述TM7705是应用于低频测量的2/3通道的模拟前端。

该器件可以接受直接来自传感器的低电平的输入信号，然后产生串行的数字输出。

利用Σ-∆转换技术实现了16位无丢失代码性能。

选定的输入信号被送到一个基于模拟调制器的增益可编程专用前端。

片内数字滤波器处理调制器的输出信号。

通过片内控制寄存器可调节滤波器的截止点和输出更新速率，从而对数字滤波器的第一个陷波进行编程。

TM7705只需2.7~3.3V或4.75~5.25V单电源。

TM7705是双通道全差分模拟输入，带有一个差分基准输入。

当电源电压为5V、基准电压为2.5V时，该器件都可将输入信号范围从0~+20mV到0~+2.5V的信号进行处理。

还可处理±20mV~±2.5V的双极性输入信号，对于TM7705是以AIN（-）输入端为参考点。

当电源电压为3V、基准电压为1.225V时，可处理0~+10mV到0~+1.225V的单极性输入信号，它的双极性输入信号范围是±10mV到±1.225V。

因此，TM7705可以实现2/3通道系统所有信号的调理和转换。

TM7705是用于智能系统、微控制器系统和基于DSP系统的理想产品。

其串行接口可配置为三线接口。

增益值、信号极性以及更新速率的选择可用串行输入口由软件来配置。

该器件还包括自校准和系统校准选项，以消除器件本身或系统的增益和偏移误差。

CMOS结构确保器件具有极低功耗，掉电模式减少等待时的功耗至20µW （典型值）。

TM7705采用16脚塑料双列直插（DIP）和16脚宽体（0.3英寸）SOIC封装和16脚TSSOP封装。

二、特点z TM7705：2个全差分输入通道的ADC16位无丢失代码0.003%非线性z可编程增益前端增益：1～128z三线串行接口z有对模拟输入缓冲的能力z 2.7～3.3V或4.75～5.25V工作电压z 3V电压时，最大功耗为1mWz等待电流的最大值为8µAz 16脚DIP、SOIC和TSSOP封装三、功能方框图四、引脚排列与功能TM7705的引脚排列TM7705五、引脚功能此端输出。

模数转换器AD7705及其接口电路

模数转换器AD7705及其接口电路
彭珊
【期刊名称】《国外电子测量技术》
【年(卷),期】2001()2
【摘要】本文介绍了串行16位的ADC芯片AD7705的基本特点及其Σ-Δ工作原理,还阐述了该芯片与单片机8051的接口方法。

【总页数】3页(P26-28)
【关键词】AD7705;模数转换器;接口电路
【作者】彭珊
【作者单位】北京军医学院
【正文语种】中文
【中图分类】TP335.1
【相关文献】
1.可编程逻辑器件与模数转换器接口电路设计 [J], 吴继侠;郝庆妮;张姣
2.模数转换器AD1674接口电路的改进 [J], 董琰婷;张杰
3.C6201 EVM与数模/模数转换器接口电路设计 [J], 王昕
4.模数转换器AD7705在蓄电池质量检测中的应用 [J], 王勇军;韩宏阁
5.流水线模数转换器的接口电路 [J], 常春波;廖述建;李晓芳
因版权原因，仅展示原文概要，查看原文内容请购买。

AD转换芯片7705

AD7705 性价比比较高的 16位 ad 使用比较简单用做单通道的时候基本不怎么需要设置做双通道的时候，发现的点问题，而这几点问题在网上的前辈那也没有特别说明这里提出来供用的着 AD7705 的参考下1. 关于时钟寄存器 AD7705 只有一个时钟寄存器而不是两个。

2.4576MHZ 是标准频率，如果用 4.9152MHZ的时候，要将 CLKDIV位置位也就是 2 分频到 2.4576 具体设置看手册2. 关于数据寄存器 AD7705 也只有一个数据寄存器，一段时间内只能对一路 AD输入做数据转换。

数据转换范围单极性 0 -- V ref/Gain 对应 0 -- 0xffff(65535)双极性 -V ref/Gain -- 0 对应 0 -- 0x8000(32768) 0 - V ref/Gain 对应 0x8000(32768) -- 0xffff(65535)3. 关于设置寄存器同样也只有一个，要用哪个通道就要先设置这个通道对应的寄存器值4. 校准寄存器虽然有 4对但只是对应外部校准的所以在用自校准，通道切换的时候也要重新自校准一下，校准的时候 DRDY为高电平，校准完后为低电平校准完后第一次读的数据不怎么准应该读第二次转换出来的数据。

下边是我单通道切换转换的程序：#include <iom16v.h>//SPI 引脚定义 PB 口#define CS_DRDY 3#define CS_CS 4#define CS_MOSI 5#define CS_MISO 6#define CS_SCK 7extern void SpiInit(void); // SPI 初始化 M16extern void InitAD7705(void); // AD7705 初始化extern unsigned int ReadDataCH1(void); //读取转换数据extern unsigned int ReadDataCH2(void); //读取转换数据#include "AD7705.H"//定义位操作#define SET_BIT(x,y) ((x) |= (0x0001 << (y)))#define CLR_BIT(x,y) ((x) &= ~(0x0001 <<(y)))#define CPL_BIT(x,y) ((x) ^= (0x0001 << (y)))#define GET_BIT(x,y) (((x) & (1 << (y))) == 0? 0:1)#define LET_BIT(x,y,z) ((x) = (x) & (~(1 << (y))) | ((z) << (y)))//**********************短延时程序50us**************************//void delay50us(unsigned int t){unsigned int j;for(;t>0;t--)for(j=0;j<70;j++);}// SPI 初始化 M16void SpiInit(void){//cs 置为输出方可不影响 SPI 总线DDRB|=(1<<CS_MOSI)|(1<<CS_SCK)|(1<<CS_CS);//使能 spi 设置为主机时钟极性为空闲时高平上升沿采样下降沿设置分频系数为128分频SPCR|=(1<<SPE)|(1<<MSTR)|(1<<SPR0);SPSR = 0x00; //setup SPISET_BIT(PORTB,CS_DRDY); //设置 REDY信号输入端口上拉电阻使能SET_BIT(PORTB,CS_MISO); //设置 MISO 信号输入端口上拉电阻使能}// SPI 发送接收数据unsigned char TransmitterSpi(unsigned char cData){SPDR = cData;while(!(SPSR&(1<<SPIF)));return SPDR;}//复位 AD7705void ResetAD(void){unsigned char i ;for(i = 10;i>0;i--) //持续DIN高电平写操作，恢复AD7705接口{TransmitterSpi(0xff);}}// AD7705 初始化void InitAD7705(void){CLR_BIT(PORTB,CS_CS); //CS置为输出低电平，使能 AD7705ResetAD() ;TransmitterSpi(0x20); //通讯寄存器 //通道 1，下一个写时钟寄存器自校准TransmitterSpi(0x00); //时钟寄存器 //写时钟寄存器设置 2.459Mhz更新速率为20hz TransmitterSpi(0x10); //通讯寄存器 //通道 1，下一个写设置寄存器TransmitterSpi(0x48); //设置寄存器 //自校准,增益 1,双极 ,缓冲delay50us(100); //延时TransmitterSpi(0x21); //通讯寄存器 //通道 2，下一个写时钟寄存器自校准TransmitterSpi(0x00); //时钟寄存器 //写时钟寄存器设置 2.459Mhz更新速率为20hz TransmitterSpi(0x11); //通讯寄存器 //通道 2，下一个写设置寄存器TransmitterSpi(0x48); //设置寄存器 //自校准,增益 1,双极,缓冲delay50us(100);}//*************************** 按照通道 1 读取 ****************************// unsigned int ReadDataCH1(void){unsigned int getData = 0;unsigned char bufR[5];TransmitterSpi(0x10); //通讯寄存器 //通道 1，下一个写设置寄存器TransmitterSpi(0x48); //设置寄存器 //自校准,增益 1,双极 ,缓冲while(PINB&(1<<CS_DRDY)); //等待校准完成 READY信号变为低电平TransmitterSpi(0x38); //发送 0x38 读取 CH1 数据寄存器while(PINB&(1<<CS_DRDY)); //等待 READY信号变为低电平bufR[0]=TransmitterSpi(0xff); //转换结果高位bufR[1]=TransmitterSpi(0xff); //转换结果低位getData=(bufR[0]<<8)|bufR[1]; //获得数据 16 位return getData ; //返回数据}//***************************按照通道 2 读取****************************// unsigned int ReadDataCH2(void){unsigned int getData = 0;unsigned char bufR[5];TransmitterSpi(0x11); //通讯寄存器 //通道 1，下一个写设置寄存器TransmitterSpi(0x48); //设置寄存器 //自校准,增益 1,双极 ,缓冲while(PINB&(1<<CS_DRDY)); //等待校准完成 READY信号变为低电平TransmitterSpi(0x39); //发送 0x01 读取 AD7705 数据寄存器while(PINB&(1<<CS_DRDY)); //等待 READY信号变为低电平bufR[0]=TransmitterSpi(0xff); //转换结果高位bufR[1]=TransmitterSpi(0xff); //转换结果低位getData=(bufR[0]<<8)|bufR[1]; //读取数据前 16 位return getData ;}void main(void){unsigned char adi ;unsigned int getData,getData2;SpiInit();InitAD7705();while(1){if(adi++ >=1) adi = 0;if(adi == 0) getData = ReadDataCH1();if(adi == 1) getData2 = ReadDataCH2();}}。

tl7705a原理

tl7705a原理TL7705A是一款用于监控和保护电源系统的集成电路。

它集成了电源检测、过压保护、欠压保护、保持重置以及系统控制等功能，广泛应用于计算机、服务器、通讯设备、工控设备等领域。

本文将详细解析TL7705A的工作原理，并以条理清晰的方式进行阐述。

一、TL7705A的电源监控功能TL7705A主要用于监控电源电压的高低，并通过RESET引脚发送重置信号。

其工作原理如下：1.供电电压（VCC）输入：TL7705A根据VCC引脚输入的电压来监控供电系统。

2.过压保护功能：当VCC高于设定的阈值（通常为4.65V）时，TL7705A会将RESET引脚拉低并断开电源，从而保护后续电路不受损害。

3.欠压保护功能：当VCC低于设定的阈值（通常为4.3V）时，TL7705A会将RESET引脚拉低并断开电源，以防止系统不正常工作。

4.时间延迟功能：由于电源系统在启动时可能有瞬间的波动，TL7705A还具有时间延迟功能，可以防止过早或过晚地发送重置信号。

二、TL7705A的保持重置功能除了电源监控外，TL7705A还具备保持重置功能。

该功能能够保持RESET引脚在一定时间内保持低电平输出信号。

1.保持重置电路：TL7705A内部嵌入了一个充电电容和一个放电电阻组成的电路。

当VCC电压低于复位阀值时，这个电路开始运行。

2.重置时间：TL7705A允许用户通过外部电阻来调整重置时间。

当VCC重新达到阈值时，放电电阻会将充电电容快速放电，从而结束重置状态。

三、TL7705A的系统控制功能TL7705A还具备一些系统控制功能，用于实现更灵活的应用：1. POWER ON RESET（POR）：一般情况下，当VCC上升到阈值以上时，TL7705A会发送一个短暂的RESET脉冲来复位目标系统。

2.外部复位或手动复位：通过RESET引脚上的外部复位脉冲或手动复位按钮，可以随时启动复位操作。

3.低功耗模式（LP）：TL7705A可以通过控制输入引脚（LP引脚）进入低功耗模式，以降低功耗并延长电池寿命。

单片机控制系统的硬件抗干扰设计

单片机控制系统的硬件抗干扰设计朱顺华王成春邹逢兴摘要：在讨论了单片机控制系统中干扰的途径和影响的基础上，从供电系统、空间电磁场、输入输出通道方面介绍了抗干扰的硬件设计方法。

关键词：单片机；硬件；抗干扰；ICTL7705；电磁场Hardware Anti- interference designFor Microcontroller Controlling SystemZhu Shunhua Wang Chengchun Zou FengxingAbstract：Based on discussing the paths and effects of interference in microcontroller controlling system, the design methods of hardware anti- interference for the system of electricity, space electromagnetic field and the access of input or output are introduced.Keywords：Microcontroller；Hardware； Anti-interference；ICTL7705；electromagnetic field中图分类号：TP202文献标识码：B1 引言单片机在工业自动化领域有着广泛的应用，但是单片机控制系统工作时往往会受到来自系统内部和外部的干扰，对系统的正常应用将带来不良的影响。

为了保证和提高中系统的可靠性和安全性，通过对系统干扰源及干扰的传播途径的研究总结出几种实践中常用且有效的干扰抑制技术。

2 干扰的途径和影响单片机控制系统在工业现场工作时都会或多或少的受到周围电磁环境的干扰。

干扰可以通过3种途径影响系统的正常工作，即供电系统干扰、空间电磁场干扰和信号传输通道干扰。

干扰对单片机控制系统的作用及后果也分为3个部位：一是系统的前向通道，干扰叠加在输入信号上，使数据采集误差增大，在传感器小电压信号输入时，此现象尤为突出；二是系统的后向通道，干扰耦合在输出信号上使输出信号混乱，导致误操作，并有可能引发严重事故；三是控制系统的内核，干扰使微处理器内核三总线上的数字信号出错，程序指针PC发生错误，导致程序“跑飞”，干扰也可能窜改存储器RAM中的数据，导致死机、系统崩溃或误操作等严重后果。

智能电表的抗干扰设计

智能电表的抗干扰设计The Design for Anti-Interference of Intelligent Electric Meter天津轻工业学院96信箱(天津　300222)　严新忠 [摘要]本文通过智能电表受电网干扰的实例,解决的方法,揭示了单片机受干扰的机理,介绍了如何验证各种抗干扰措施的效果,给出了智能电表有效的抗干扰方案。

[关键词]智能电表　单片机　抗干扰Abstract:Through an example of intelligent electric meter disturbed by electric-network and its solu2 tion,this paper reveals the reason why the single-chip was disturbed.It also introduces the effect of different anti-interference,and gives the effective anti-interference solution.K eyw ords:Intelligent electric meter　Single-chip　Anti-interference1　引言智能电表要求长年连续的挂网运行,运行中出现的任何异常现象(比如数据乱、死机等)均要求智能电表能自动恢复正常工作,其抗干扰要求很高。

在智能电表的研制初期,我们发现这么一种现象:电表带上电感性负载(比如电扇)时,在电扇快速插拔的瞬间,容易导致智能电表单片机系统数据丢失和死机。

电扇仅是普通家电,电网连接着千家万户,如果从设计上不能把智能电表的抗干扰问题解决好,后果会很严重。

2　硬件上的抗干扰措施电感性负载的快速切换为什么会导致单片机数据乱和死机?又如何加以解决?2.1分析受干扰时的电源电压波形在电感性负载快速切换的同时,观察电源电压各点的波形包括变压器次极、整流后电压和稳压后电压波形。

AD7705中文资料_数据手册_参数

片上寄存器AD7705/AD7706包含8个片上寄存器，可以通过部件的串口访问。第一个是通信寄存器，它控制信道选择，决定下一个操作是读操作还是写操作，还决定下一个读操作或写操作访问哪个寄存器。对部件的所有通信都必须从通信寄存器的写操作开始。开机或复位后，设备期望对其通信寄存器进行写操作。写入到该寄存器的数据决定部件的下一个操作是读操作还是写操作，还决定发生该读操作或写操作的寄存器。因此，对部分上任何其他寄存器的写访问都是从对通信寄存器的写操作开始，然后是对所选寄存器的写操作。从部分上的任何其他寄存器(包括通信寄存器本身和输出数据寄存器)开始的读操作从对通信寄存器的写操作开始，然后从所选寄存器开始的读操作。通信寄存器还控制备用模式和通道的选择，并且还可以通过从通信寄存器读取数据来获得drdy状态。第二寄存器是aSetup寄存器，它决定校准模式、增益设置、双极/单极操作和缓冲模式。第三个寄存器标记为时钟寄存器，并包含筛选器选择位和时钟控制位。第四个寄存器是数据寄存器，从该寄存器可以访问部件的输出数据。最后的寄存器是存储通道校准数据的校准寄存器。下面几节将更详细地讨论寄存器。通信寄存器(RS2, RS1, RS0 = 0,0,0)通信寄存器是一个8位寄存器，可以从中读取数据，也可以从中写入数据。对部件的所有通信都必须从通信寄存器的写操作开始。写入通信登记程序的数据决定下一个操作是读操作还是写操作，以及该操作发生在哪个寄存器。对所选寄存器的后续读或写操作完成后，接口返回到它期望对通信寄存器执行写操作的位置。这是接口的默认状态，在启动或设置之后，AD7705/AD7706处于此默认状态，等待通信寄存器的写操作。在接口序列丢失的情况下，如果使用 DIN high执行足够长时间的写操作(至少包含32个串行时钟周期)，AD7705将返回到这个默认状态。表V概述了通信寄存器的位名称。表 V.通信寄存器0/DRDY (0)RS2 (0)RS1 (0)RS0 (0)R/W (0)STBY (0)CH0 (0)如果将“1”写入该位，则该部分将不计时到寄存器中的后续位。它将保持在这个位的位置，直到一个“0”被写到这个位。一旦将“0”写入该位，接下来的7位将加载到通信寄存器。对于读取操作，此位提供来自部分的drdy标志的状态。该位的状态与drdy输出引脚相同。RS2-RS0Register选择位。这三个位选择下一个读或写操作发生在8个片上寄存器中的哪一个，如表VI所示，同时选择寄存器大小。当对受连接寄存器的读或写操作完成时，该部分返回到它正在等待对CommunicationsRegister的写操作的位置。它不处于将继续访问寄存器的状态。

微处理器电源监视集成电路TL7705AC

微处理器电源监视集成电路TL7705AC
陆晓
【期刊名称】《水利水文自动化》
【年(卷),期】1992(000)003
【摘要】一、前言每一个微处理器系统都需要一个复位电路,以保证上电时,整个系统处于—个正确的初始状态。

通常使用RC电路作为上电复位电路,但此电路存在着不少无法避免的缺点。

为了克服这些缺点,提高系统的可靠性,美国德州仪器公司(TT)推出了一系列的电源电路,它们都能在电源上电时产生复位信号,平时监视电源电压,当电源掉电或降低时,产生复位信号,直至电源恢复正常。

在这一系列集成电路中,TL7705AC具有外围元件最少,温度范围最宽,驱动能力最强等特点。

【总页数】3页(P36-38)
【作者】陆晓
【作者单位】无
【正文语种】中文
【中图分类】TP368.103
【相关文献】
1.一种实用的微处理器电源监视器 [J], 孟志强
2.一种微处理器电源监视器的设计与实现 [J], 周鸣争
3.电源电压监视用集成电路TL7705CP芯片的应用 [J], 李琦;申军
4.微处理器电源集成电路 [J], 过玉清
5.新一代微处理器的电子电源——稳压电源模块(VRM) [J], 蔡宣三
因版权原因，仅展示原文概要，查看原文内容请购买。

7705芯片

利用ADD7705采样数据，与51单片机通讯，硬件连接是：P3.1提供数据脉冲，与AD7705的SCLK管脚连接，P3.0与DOUT，DIN相连，并接上拉电阻，利用51串口方式1工作，程序如下：#include<stc89c58.h>#include<intrins.h>sbit AD7705_DATA=P3^0; // AD7705 input & output datasbit AD7705_CLK=P3^1; // AD7705 CLKsbit AD7705_DRDY=P2^7; // AD7705 data readysbit DIS= P4^1;unsigned int data_out;unsigned char rearrange(unsigned char a){unsigned char i,b;b=a&0x01;for(i=1; i<8; i++){b=b<<1;a=a>>1;b=b+(a&0x01);}return(b);}/*******************************************************/void Delayms(unsigned char ms)// relay ms{ unsigned char i;while(ms--){for(i=0; i<124; i++);}}/****************************************************************/void WriteToReg_ADC(unsigned char a){SBUF=a;while(!TI);TI=0;}/*************************************************************/void AD7705_Init(){WriteToReg_ADC(0x04); //write 0x20 to communication register to choose channel 0//and clock register for the next one to writeWriteToReg_ADC(0x20); //0x04 to CLR，2.4576MHz,50Hz.WriteToReg_ADC(0x08); //write 0x10 to communication register to choose channel 0//and setup register for the next one to writeWriteToReg_ADC(0x62); //0x44，1, buffer off, FSYNC=0, and self-calibration}/*************************************************************/unsigned int ReadWord(){unsigned char high8,low8;unsigned int out;while(AD7705_DRDY);SCON=0x10;while(!RI);high8=SBUF;RI=0;while(!RI);low8=SBUF;REN=0;out=rearrange(high8);out=out<<8;out=out+rearrange(low8);return(out);}main(){AD7705_Init();while(1){DIS=0;Delayms(80);DIS=1;Delayms(80);WriteToReg_ADC(0x1c);data_out=ReadWord();}}问题是，AD7705好象没有工作，管脚DRDY一直处于高电平，希望高手指点先谢谢了！问题补充：串口方式是采用方式0，是我打错了，这个程序是最先的现在改为AD7705的复位引脚和片选引脚都用I/O口控制，采用模拟时钟，不过结果还是那样，DRDY没有低电平，AD7705似乎没有工作：我来帮他解答满意回答检举| 2008-11-14 19:171.51串口方式1有停止位，每次发送一个字节，将产生至少九个时钟脉冲。

TL7705 芯片手册

AD7705_最好的中文资料

—— ——
CS
择，或在与 AD7705/7706 通信时，CS可用作帧同步信号复位输入。低电平有效的输入，将器件的控制逻辑、接口逻辑、校准系 5 RESET 数、数字滤波器和模拟调制器复位至上电状态对于 AD7705，差分模拟输入通道 2 的正输入端。对于 AD7706，模拟输入 6 AIN2(+)[AIN1] 通道 1 的输入端对于 AD7705，差分模拟输入通道 1 的正输入端；对于 AD7706，模拟输入 7 AIN1(+)[AIN2] 通道 2 的输入端对于 AD7705，差分模拟输入通道 1 的负输入端；对于 AD7706，COMMON 输 8 AIN1(-)[COMMON] 入端，模拟通道 1、2、3 的输入以此输入端为基准基准输入端。AD7705/7706 差分基准输入的正输入端。基准输入是差分 9 REFIN(+) 的，并规定 REFIN(+)必须大于 REFIN(-)。REFIN(+)可以取 VDD 和 GND 之间的任何值基准输入端。AD7705/7706 差分基准输入的负输入端。REFIN(-)可以取 10 REFIN(-) VDD 和 GND 之间的任何值，且满足 REFIN(+)大于 REFIN(-) 对于 AD7705，差分模拟输入通道 2 的负输入端。对于 AD7706，模拟输入 11 AIN2(-)[AIN3] 通道 3 输入端逻辑输出。这个输出端上的逻辑低电平表示可从 AD7705/7706 的数据寄存器获取新的输出字。完成对一个完全的输出字的读操作后， DRDY引脚立即回到高电平。如果在两次输出更新之间，不发生数据读出， DRDY将在下一 12
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DOUT
14 15 16

7705 SAR产品文档说明书

3HE 11020 AAAC TQZZA Edition 01September 2017Documentation Suite Overview7705Service Aggregation Router , Release 8.0IntroductionThis document describes the following for the 7705Service Aggregation Router , Release 8.0:•7705SAR platforms•software documents in this documentation suite •hardware documents in this documentation suite •quick reference cards in this documentation suite •accessing and searching the documentation •contact information7705SAR PlatformsSAR-8SAR-18SAR-ASAR-Ax SAR-HSAR-HcSAR-MSAR-OSAR-WSAR-WxSAR-XSoftware documents in this documentation suiteThe following table describes the software documents in this documentation suite and the intended audience.Intended audience legend:•A —Network architects and designers•B —Installers and hardware maintenance technicians•C —Network technicians, administrators, operators, and service providersDocumentDescriptionIntended Audience AB C 7705SAR Basic System Configuration GuideThis guide describes CLI and file system concepts and provides configuration explanations andexamples to configure the 7705SAR boot option file (BOF) and perform system and file management functions.YYY7705SAR Interface Configuration GuideThis guide describes card, module, and port features and provides configuration examples to configure CSM cards, adapter cards, modules and ports for the 7705SAR.YY7705SAR MPLS GuideThis guide describes how to configure Multiprotocol Label Switching (MPLS), Resource Reservation Protocol for Traffic Engineering (RSVP-TE), and Label Distribution Protocol (LDP).YY7705SAR OAM and Diagnostics GuideThis guide describes Operations, Administration and Management (OAM) and diagnostic tools provided by the 7705SAR and presents examples to configure and implement various tests.YY7705SAR Quality of Service Guide This guide describes the Quality of Service (QoS) functionality provided by the 7705SAR and presents configuration and implementation examples.YY7705SAR Router Configuration GuideThis guide describes logical IP routing interfaces, filtering, and routing policy support provided by the 7705SAR and presents configuration and implementation examples.YY7705SAR Routing Protocols Guide This guide provides an overview of dynamic routing concepts and describes how to configure them.Y Y 7705SAR Services GuideThis guide describes how to configure serviceparameters such as service access points (SAPs), service destination points (SDPs), customer information, and user services.YY7705SAR System Management GuideThis guide describes router security, user accessibility, SNMP features, and event and accounting logs, and provides configuration information and examples.YYHardware documents in this documentation suiteThe intended audience for the hardware documents in this documentation suite are network architects and designers, installers, and hardware maintenance technicians.•7705SAR 2-port 10GigE (Ethernet) Adapter Card/Module Installation Guide •7705SAR 4-port SAR-H Fast Ethernet Module Installation Guide•7705SAR 4-port T1/E1 and RS-232 Combination Module Installation Guide •7705SAR 6-port E&M Adapter Card Installation Guide •7705SAR 6-port FXS Adapter Card Installation Guide •7705SAR 6-port SAR-M Ethernet Module Installation Guide •7705SAR 8-port FXO Adapter Card Installation Guide•7705SAR 8-port Voice & Teleprotection Card Installation Guide•7705SAR 10-port 1GigE/1-port 10GigE X-Adapter Card Installation Guide •7705SAR Auxiliary Alarm Card Installation Guide•7705SAR CWDM OADM Adapter Card/Module Installation Guide •7705SAR DS3/E3 Adapter Card Installation Guide •7705SAR DSL Module Installation Guide•7705SAR Ethernet/Gigabit Ethernet Adapter Card Installation Guide •7705SAR GNSS Receiver Card Installation Guide •7705SAR GPON Module Installation Guide •7705SAR GPS Receiver Module Installation Guide •7705SAR Integrated Services Card Installation Guide •7705SAR SONET/SDH Adapter Card Installation Guide •7705SAR Packet Microwave Adapter Card Installation Guide •7705SAR Power Injector Card Installation Guide •7705SAR-8 Chassis Installation Guide •7705SAR-18 Chassis Installation Guide •7705SAR-A Chassis Installation Guide •7705SAR-Ax Chassis Installation Guide •7705SAR-H Chassis Installation Guide •7705SAR-Hc Chassis Installation Guide •7705SAR-M Chassis Installation Guide •7705SAR-O Chassis Installation Guide •7705SAR-W Chassis Installation Guide •7705SAR-Wx Chassis Installation Guide •7705SAR-X Chassis Installation Guide•7705SAR Serial Data Interface Card Installation Guide •7705SAR T1/E1 ASAP Adapter Card Installation GuideThe documentation set also includes the 9500 Microwave Packet Radio, MPT Craft Terminal User Manual for Single NE Mode with 7705SAR. The manual provides information about using the 9500 MPR MPT Craft Terminal interface with an MPT radio in Single NE Mode with the 7705SAR.Using the Documentation Center to access 7705SAR documentation1.Open a browser and navigate to:Customer Documentation Welcome PageThe Documentation Center appears. By default, the products are listed by the most accessed.a)To list products alphabetically, click All Products (A-Z).b) To list products by product category, click Product Category, and select a category from thelist that appears on the right. The associated products appear in the product list.2.Click on 7705SAR (Service Aggregation Router) in the list. The documentation webpage forthat product appears. The most recent documents are listed by default.3.To search for specific title words or document numbers on the documentation webpage, enter asearch term in the “Search for:” field and choose one of the following from the drop-down menu:•Title (default)•Doc Number (in format 3HE xxxxx NNNN)Click Search. The list of documents that meet your search criteria appears on the right.Note: You can click Reset All to remove the search filter.4.To filter or sort the documents on the documentation webpage, choose an option for one ormore of the following:•Release—filters listed documents by the release number•Model—filters listed documents by the 7705SAR model•Content Type—filters listed documents by content type: All Types, Manuals and Guides, or Release Information•Category—filters listed documents by documentation category: All Categories, Administration, Alarm, Configuration, Installation, Maintenance, Planning, Provisioning,Safety, Security, Troubleshooting, or User Guide•Format—filters listed documents by document format: All Formats, PDF, HTML, or Zip Collection•Sort—sorts listed documents by Issue Date, Title (A-Z), Doc Number, or Most Accessed (A-Z)The list of documents that meet your filtering and sorting criteria appears on the right. You can choose additional options to reduce the number of results.Note: You can click Reset All to remove any filtering or sorting.5.Select a document by clicking the associated icon:•PDF icon—the PDF appears•HTML icon—the document in HTML appears•Zip Collection icon—a Save As window appears. Navigate to a location on your computer and click Save.Note: If the document is restricted, a key is displayed beside the part number. This means that you must log in to OLCS and enter your user name and password. If you cannot access the document after logging in, your account does not have permission to access the document.Contact your Nokia technical support representative.If you do not have a username and password, you can request one from the Documentation Center webpage. A link is also available to provide feedback about the Documentation Center webpage.Searching the Documentation Center for specific text in the 7705SAR documentationThis procedure only searches for text in PDF files.1.Open a browser and navigate to:The Documentation Center appears. By default, the products are listed by the most accessed.a) To list products alphabetically, click All Products (A-Z).b) To list products by product category, click Product Category, and select a category from the listthat appears on the right. The associated products appear in the product list.2.Click on 7705SAR (Service Aggregation Router) in the list. The documentation webpage for thatproduct appears. The most recent documents are listed by default.3.Enter a search term and choose Full Text from the “Search for:” drop-down menu.Note: To search for phrases, type the phrase within quotation marks; for example, “synchronousEthernet”.4.Click Search. The Search Results webpage appears.5.To filter the results from Full Text searches, choose one of the following from the Refine Bysidebar on the Search Results webpage:•Language•Dates6.To sort the results from Full Text searches, choose one of the following from the Sort By drop-down menu on the Search Results webpage:•Relevance (default)•Title•Date7.Click a document title. The PDF appears.Multiple PDF file searchYou can use Adobe Reader, Release 6.0 or later, to search multiple PDF files for a term. AdobeReader displays the results in a display panel. The results are grouped by PDF file. You can expandthe entry for each file.Note: The PDF files that you search must be in the same folder.1.Open Adobe Reader.2.Choose Edit→Search from the Adobe Reader main menu. The Search panel appears.3.Enter the term to search for.4.Select “All PDF Documents in”.5.Choose the folder in which to search using the drop-down menu.6.Select the following search criteria, if required:•Whole words only•Case-Sensitive•Include Bookmarks•Include Comments7.Click Search.Adobe Reader displays the search results. You can expand the entries for each file by clicking onthe + symbol.8.Click on a search result to go directly to that location in the selected file.Proximity searchUse Adobe Reader proximity searches to reduce the number of results for a search.Note: Proximity searches can only be performed on multiple PDFs.1.Open Adobe Reader.2.Choose Edit→Preferences from the main menu. The Preferences window appears.3.Choose Search in the Categories window. The Search preferences appear.4.Enter a number (for example, 25) in the “Range of words for Proximity searches” field.Note: A lower number improves the proximity search.5.Click OK to save the changes and close the Preferences window.6.Choose Edit→Search from the main menu.7.Click the “Use Advanced Search Options” link at the bottom of the Search window. TheAdvanced Search window opens.8.In the Look In drop-down menu, choose the folder in which to search.9.Enter the terms for the proximity search in the “What word or phrase would you like to searchfor?” field. Do not use any text or punctuation (such as commas, quotation marks, “and”, “or”) toseparate search terms.10.Choose Match All of the words from the “Return results containing” field. The Proximity checkbox is now selectable.11.Select the Proximity check box.12.Click Search. If the number of search results is too high or low, repeat steps 2 to 5 to decrease orincrease the value in the “Range of words for Proximity searches” field.Documentation supportIf you have questions or comments about this documentation suite, contact:Customer Documentation FeedbackTechnical supportCustomer support representatives are available to assist you 24 hours a day, 7 days a week. For a listof regional contact telephone and fax numbers, go to:Product Support PortalNokia is a registered trademark of Nokia Corporation. Other products and company names mentionedherein may be trademarks or tradenames of their respective owners. The information presented issubject to change without notice. No responsibility is assumed for inaccuracies contained herein.Copyright © 2016-2017 Nokia. All rights reserved.。

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1POST OFFICE BOX 655303 •DALLAS, TEXAS 75265DExternally Adjustable Pulse Durationdescription/ordering informationORDERING INFORMATION {T APACKAGE }ORDERABLEPART NUMBER TOP-SIDE MARKING PDIP (P)Tube of 50TL7702ACP TL7702ACP SOIC (D)Tube of 75TL7702ACD SOIC (D)Reel of 2500TL7702ACDR 7702AC PDIP (P)Tube of 50TL7705ACP TL7705ACP SOIC (D)Tube of 75TL7705ACD SOIC (D)Reel of 2500TL7705ACDR 7705AC SOP (PS)Reel of 2000TL7705ACPSR T7705A °°PDIP (P)Tube of 50TL7709ACP TL7709ACP 0C to 70CSOIC (D)Tube of 75TL7709ACD SOIC (D)Reel of 2500TL7709ACDR 7709AC PDIP (P)Tube of 50TL7712ACP TL7709ACP SOIC (D)Tube of 75TL7712ACD SOIC (D)Reel of 2500TL7712ACDR 7712AC PDIP (P)Tube of 50TL7715ACP TL7715ACP SOIC (D)Tube of 75TL7715ACD 7715AC PDIP (P)Tube of 50TL7702AIP TL7702AIP SOIC (D)Tube of 75TL7702AID SOIC (D)Reel of 2500TL7702AIDR 7702AI −40°C to 85°PDIP (P)Tube of 50TL7705AIP TL7705AIP 40CSOIC (D)Tube of 75TL7705AID SOIC (D)Reel of 2500TL7705AIDR 7705AI SOIC (D)Reel of 2500TL7712AIDR7712AI†For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at .‡Package drawings, thermal data, and symbolization are available at /packaging.PRODUCTION DATA in ormation is current as o publication date.Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.TL7702A, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORSSLVS028I − APRIL 1983 − REVISED JULY 20092POST OFFICE BOX 655303 •DALLAS, TEXAS 75265description/ordering information (continued)The TL77xxA family of integrated-circuit supply-voltage supervisors is designed specifically for use as reset controllers in microcomputer and microprocessor systems. The supply-voltage supervisor monitors the supply for undervoltage conditions at the SENSE input. During power up, the RESET output becomes active (low)when V CC attains a value approaching 3.6 V. At this point (assuming that SENSE is above V IT+), the delay timer function activates a time delay, after which outputs RESET and RESET go inactive (high and low, respectively).When an undervoltage condition occurs during normal operation, RESET and RESET go active. T o ensure that a complete reset occurs, the reset outputs remain active for a time delay after the voltage at the SENSE input exceeds the positive-going threshold value. The time delay is determined by the value of the external capacitor C T : t d = 1.3 × 104 × C T , where C T is in farads (F) and t d is in seconds (s).During power down and when SENSE is below V IT−, the outputs remain active until V CC falls below 2 V. After this, the outputs are undefined.An external capacitor (typically 0.1 µF) must be connected to REF to reduce the influence of fast transients in the supply voltage.functional block diagramThe functional block diagram is shown for illustrative purposes only; the actual circuit includes a trimming network to adjust the reference voltage and sense-comparator trip point.RESINSENSEGNDV CCCT REFNOTES: A.TL7702A: R1 = 0 Ω, R2 = openTL7705A: R1 = 7.8 k Ω, R2 = 10 k ΩTL7709A: R1 = 19.7 k Ω, R2 = 10 k ΩTL7712A: R1 = 32.7 k Ω, R2 = 10 k ΩTL7715A: R1 = 43.4 k Ω, R2 = 10 k ΩB.Resistor values shown are nominal.RESETRESETTL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORSSLVS028I − APRIL 1983 − REVISED JULY 20093POST OFFICE BOX 655303 •DALLAS, TEXAS 75265timing diagramOutput UndefinedV CC and SENSEV CC ≈CC ≈ 2 Vabsolute maximum ratings over operating free-air temperature range (unless otherwise noted)†Supply voltage, V CC (see Note 1) 20 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range, V I , RESIN −0.3 V to 20 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range, V I , SENSE:TL7702A (see Note 2) −0.3 V to 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TL7705A −0.3 V to 20 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TL7709A −0.3 V to 20 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TL7712A, TL7715A −0.3 V to 20 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High-level output current, I OH , RESET −30 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Low-level output current, I OL , RESET 30 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Package thermal impedance, θJA (see Notes 3 and 4):D package 97°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . P package 85°C/W . . . . . . . . . . . . . . . . . . . . . . . . . . . . PS package 95°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . Operating virtual junction temperature, T J 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, T stg −65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . †Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.NOTES: 1.All voltage values are with respect to GND.2.For proper operation of the TL7702A, the voltage applied to the SENSE terminal should not exceed V CC − 1 V or 6 V, whicheveris less.3.Maximum power dissipation is a function of T J (max), θJA , and T A . The maximum allowable power dissipation at any allowableambient temperature is P D = (T J (max) − T A )/θJA . Operating at the absolute maximum T J of 150°C can affect reliability.4.The package thermal impedance is calculated in accordance with JESD 51-7.TL7702A, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORSSLVS028I − APRIL 1983 − REVISED JULY 20094POST OFFICE BOX 655303 •DALLAS, TEXAS 75265recommended operating conditionsMINMAX UNIT V CC Supply voltage3.518V V IH High-level input voltage at RESIN 2V V ILLow-level input voltage at RESIN0.6VTL7702A 0See Note 2TL7705A010V Input voltage, SENSE TL7709A 015VIp gTL7712A 020TL7715A020I OH High-level output current, RESET −16mA I OL Low-level output current, RESET 16mA Operating free air temperature range TL77xxAC 070T AOperating free-air temperature rangeTL77xxAI−4085°C NOTE 2:For proper operation of the TL7702A, the voltage applied to the SENSE terminal should not exceed V CC − 1 V or 6 V , whichever is less.electrical characteristics over recommended operating conditions (unless otherwise noted)TEST CONDITIONS TL77xxACTL77xxAI PARAMETER†MIN TYPMAXUNIT V OH High-level output voltage, RESET I OH = −16 mA V CC −1.5V V OL Low-level output voltage, RESET I OL = 16 mA 0.4V V refReference voltageT A = 25°C2.48 2.53 2.58VTL7702A 2.48 2.53 2.58N ti i i t th h ld lt TL7705A4.54.55 4.6Negative-going input threshold voltage,TL7709A = 25°7.57.67.7V IT−SENSETL7712A T A 25C10.610.811VTL7715A 13.213.513.8TL7702A 10TL7705A15− V TL7709A = 25°20V hysHysteresis, SENSE (V IT+ V IT−)TL7712A T A 25C35mVTL7715A45RESIN V I = 2.4 V to V CC 20V I = 0.4 V−100I I Input currentSENSETL7702AV ref < V I < V CC − 1.5 V 0.52µAI OH High-level output current, RESET V O = 18 V 50µA I OL Low-level output current, RESET V O = 0−50µA I CCSupply currentAll inputs and outputs open1.83mA †All electrical characteristics are measured with 0.1-µF capacitors connected at REF, CT, and V CC to GND.TL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORSSLVS028I − APRIL 1983 − REVISED JULY 20095POST OFFICE BOX 655303 •DALLAS, TEXAS 75265switching characteristics over recommended operating conditions (unless otherwise noted)TEST CONDITIONS TL77xxAC TL77xxAI PARAMETER†MIN TYP MAX UNIT Output pulse duration C T = 0.1 µF0.65 1.22.6msec Input pulse duration at RESIN0.4µs t w(S)Pulse durationat SENSE input to switch outputs V IH = V IT− + 200 mV,V IL = V IT− − 200 mV2µs t pd Propagation delay time, RESIN to RESET V CC = 5 V 1µs Rise time RESET 5V See Note 50.2t r Rise timeRESET V CC = 5 V,See Note 53.5µs Fall time RESET 5VSee Note 5 3.5t fFall time RESETV CC = 5 V,See Note 50.2µs†All switching characteristics are measured with 0.1-µF capacitors connected at REF and V CC to GND.NOTE 5:The rise and fall times are measured with a 4.7-k Ω load resistor at RESET and RESET.PARAMETER MEASUREMENT INFORMATION0 V V IHV ILSENSERESETRESINRESETV OH(RESET)V OL(RESET)Figure 1. Voltage WaveformsTL7702A, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORSSLVS028I − APRIL 1983 − REVISED JULY 20096POST OFFICE BOX 655303 •DALLAS, TEXAS 75265TYPICAL CHARACTERISTICS †Figure 2302622182463438ASSERTION TIMEvsLOAD RESISTANCE42810t − A s s e r t i o n T i m e − n sR L − Load Resistance − k ΩFigure 343210246t − D e a s s e r t i o n T i m e −56DEASSERTION TIMEvsLOAD RESISTANCE7810sµR L − Load Resistance − kΩFigure 43228242002550751001253640ASSERTION TIMEvsLOAD CAPACITANCE44150175200t − A s s e r t i o n T i m e − n sC L − Load Capacitance − pFFigure 52.421.61.22.83.2DEASSERTION TIMEvsLOAD CAPACITANCE3.60255075100125150175200C L − Load Capacitance − pF0.8t − D e a s s e r t i o n T i m e −sµ†For proper operation, both RESET and RESET should be terminated with resistors of similar value. Failure to do so may cause unwanted plateauing in either output waveform during switching.TL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORSSLVS028I − APRIL 1983 − REVISED JULY 20097POST OFFICE BOX 655303 •DALLAS, TEXAS 75265APPLICATION INFORMATIONSystem ResetΩ5 V 12 V−12 VGNDΩFigure 6. Multiple Power-Supply System Reset Generation5 VGNDC T (F )+t d (s )1.3 104Figure 7. Reset Controller for TMS7000 SystemTL7702A, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORSSLVS028I − APRIL 1983 − REVISED JULY 20098POST OFFICE BOX 655303 •DALLAS, TEXAS 75265APPLICATION INFORMATION5 VSystem RESETInputFigure 8. Eliminating Undefined States Using a P-Channel JFETSystem RESETV CCSENSE InputFigure 9. Eliminating Undefined States Using a pnp TransistorPACKAGING INFORMATIONOrderable Device Status (1)Package Type PackageDrawing Pins Package Qty Eco Plan (2)Lead/Ball FinishMSL Peak Temp (3)Samples(Requires Login)TL7702ACD ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7702ACDE4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7702ACDG4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7702ACDR ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7702ACDRE4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7702ACDRG4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7702ACP ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales Office TL7702ACPE4ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales Office TL7702AID ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7702AIDE4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7702AIDG4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7702AIDR ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7702AIDRE4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7702AIDRG4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7702AIP ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales OfficeTL7702AIPE4ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales OfficeTL7702AMFKB OBSOLETE LCCC FK20TBD Call TI Call TI Samples Not Available TL7702AMJG OBSOLETE CDIP JG8TBD Call TI Call TI Samples Not AvailableAddendum-Page 1Orderable Device Status (1)Package Type PackageDrawing Pins Package Qty Eco Plan (2)Lead/Ball FinishMSL Peak Temp (3)Samples(Requires Login)TL7702AMJGB OBSOLETE CDIP JG8TBD Call TI Call TI Samples Not AvailableTL7705ACD ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7705ACDE4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7705ACDG4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7705ACDR ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7705ACDRE4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7705ACDRG4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7705ACP ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales OfficeTL7705ACPE4ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales OfficeTL7705ACPSLE OBSOLETE SO PS8TBD Call TI Call TI Replaced by TL7705ACPSRTL7705ACPSR ACTIVE SO PS82000Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7705ACPSRE4ACTIVE SO PS82000Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7705ACPSRG4ACTIVE SO PS82000Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7705AID ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7705AIDE4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7705AIDG4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7705AIDR ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7705AIDRE4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7705AIDRG4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeAddendum-Page 29-Jul-2010Orderable Device Status (1)Package Type PackageDrawing Pins Package Qty Eco Plan (2)Lead/Ball FinishMSL Peak Temp (3)Samples(Requires Login)TL7705AIP ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales Office TL7705AIPE4ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales OfficeTL7709ACD ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7709ACDE4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7709ACDG4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7709ACDR ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7709ACDRE4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7709ACDRG4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7709ACP ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales OfficeTL7709ACPE4ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales Office TL7709AID OBSOLETE SOIC D8TBD Call TI Call TI Samples Not Available TL7709AIP OBSOLETE PDIP P8TBD Call TI Call TI Samples Not Available TL7712ACD ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7712ACDE4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7712ACDG4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase SamplesTL7712ACDR ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7712ACDRE4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7712ACDRG4ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7712ACP ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales Office9-Jul-2010Orderable Device Status (1)Package Type PackageDrawing Pins Package Qty Eco Plan (2)Lead/Ball FinishMSL Peak Temp (3)Samples(Requires Login)TL7712ACPE4ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales OfficeTL7712AID OBSOLETE SOIC D8TBD Call TI Call TI Replaced by TL7712ACD TL7712AIDR ACTIVE SOIC D82500Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Purchase Samples TL7712AIP OBSOLETE PDIP P8TBD Call TI Call TI Replaced by TL7712ACPTL7715ACD ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7715ACDE4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7715ACDG4ACTIVE SOIC D875Green (RoHS& no Sb/Br)CU NIPDAU Level-1-260C-UNLIM Contact TI Distributoror Sales OfficeTL7715ACP ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales Office TL7715ACPE4ACTIVE PDIP P850Pb-Free (RoHS)CU NIPDAU N / A for Pkg Type Contact TI Distributoror Sales Office TL7715AID OBSOLETE SOIC D8TBD Call TI Call TI Samples Not Available TL7715AIP OBSOLETE PDIP P8TBD Call TI Call TI Samples Not Available(1) The marketing status values are defined as follows:ACTIVE: Product device recommended for new designs.LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.PREVIEW: Device has been announced but is not in production. Samples may or may not be available.OBSOLETE: TI has discontinued the production of the device.(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check /productcontent for the latest availability information and additional product content details.TBD: The Pb-Free/Green conversion plan has not been defined.Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.9-Jul-2010 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.TAPE AND REELINFORMATION *All dimensionsare nominal Device Package Type Package DrawingPinsSPQ Reel Diameter (mm)Reel Width W1(mm)A0(mm)B0(mm)K0(mm)P1(mm)W (mm)Pin1Quadrant TL7702ACDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7702AIDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7705ACDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7705ACPSR SOPS 82000330.016.48.2 6.6 2.512.016.0Q1TL7705AIDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7709ACDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7712ACDR SOICD 82500330.012.4 6.4 5.2 2.18.012.0Q1TL7712AIDR SOIC D 82500330.012.4 6.4 5.2 8-Jul-2011*All dimensionsare nominal DevicePackage Type Package Drawing Pins SPQ Length (mm)Width (mm)Height (mm)TL7702ACDRSOIC D 82500346.0346.029.0TL7702AIDRSOIC D 82500340.5338.120.6TL7705ACDRSOIC D 82500340.5338.120.6TL7705ACPSRSO PS 82000346.0346.033.0TL7705AIDRSOIC D 82500340.5338.120.6TL7709ACDRSOIC D 82500340.5338.120.6TL7712ACDRSOIC D 82500340.5338.120.6TL7712AIDR SOIC D 82500340.5338.120.6 8-Jul-2011IMPORTANT NOTICETexas Instruments Incorporated and its subsidiaries(TI)reserve the right to make corrections,modifications,enhancements,improvements, and other changes to its products and services at any time and to discontinue any product or service without notice.Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty.Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty.Except where mandated by government requirements,testing of all parameters of each product is not necessarily performed.TI assumes no liability for applications assistance or customer product design.Customers are responsible for their products and applications using TI components.To minimize the risks associated with customer products and applications,customers should provide adequate design and operating safeguards.TI does not warrant or represent that any license,either express or implied,is granted under any TI patent right,copyright,mask work right, or other TI intellectual property right relating to any combination,machine,or process in which TI products or services are rmation published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement e of such information may require a license from a third party under the patents or other intellectual property of the third party,or a license from TI under the patents or other intellectual property of TI.Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties,conditions,limitations,and notices.Reproduction of this information with alteration is an unfair and deceptive business practice.TI is not responsible or liable for such altered rmation of third parties may be subject to additional restrictions.Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice.TI is not responsible or liable for any such statements.TI products are not authorized for use in safety-critical applications(such as life support)where a 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TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are designated by TI as compliant with ISO/TS16949requirements.Buyers acknowledge and agree that,if they use any non-designated products in automotive applications,TI will not be responsible for any failure to meet such requirements.Following are URLs where you can obtain information on other Texas Instruments products and application solutions:Products ApplicationsAudio /audio Communications and Telecom /communicationsAmplifiers Computers and Peripherals /computersData Converters Consumer Electronics /consumer-appsDLP®Products Energy and Lighting /energyDSP Industrial /industrialClocks and Timers /clocks Medical /medicalInterface Security /securityLogic Space,Avionics and Defense /space-avionics-defense Power Mgmt Transportation and /automotiveAutomotiveMicrocontrollers Video and Imaging /videoRFID Wireless /wireless-appsRF/IF and ZigBee®Solutions /lprfTI E2E Community Home Page Mailing Address:Texas Instruments,Post Office Box655303,Dallas,Texas75265Copyright©2011,Texas Instruments Incorporated。

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