ME2804(世微)中文

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几种运算放大器型号选择

OPA342 OPA343 OPA344 OPA345 OPA347 OPA348 OPA349 OPA350 OPA353 OPA354 OPA355 OPA356 OPA357 OPA358 OPA363 OPA364 OPA365 OPA37 OPA373 OPA374 OPA379 OPA380 OPA381 OPA445 OPA452 OPA453 OPA541 OPA544
OPA547 OPA548 OPA549 OPA551 OPA552 OPA561 OPA567 OPA569 OPA602 OPA606 OPA683 OPA684 OPA690 OPA691 OPA692 OPA694 OPA703 OPA704 OPA705 OPA725 OPA726 OPA727 OPA728 OPA734 OPA735 OPA743 OPA820
精密放大器精密放大器精密放大器精密放大器精密放大器精密放大器精密放大器精密放大器精密放大器精密放大器高速放大器（大于等于 50MHz）高速放大器（大于等于 50MHz）高速放大器（大于等于 50MHz）高速放大器（大于等于 50MHz）视频功能高速放大器（大于等于 50MHz）精密放大器精密放大器精密放大器精密放大器精密放大器精密放大器精密放大器精密放大器精密放大器精密放大器高速放大器（大于等于 50MHz）
高速放大器（大于等于 50MHz）高速放大器（大于等于 50MHz）运算放大器运算放大器运算放大器运算放大器运算放大器运算放大器运算放大器运算放大器高速放大器（大于等于 50MHz）高速放大器（大于等于 50MHz）高速放大器（大于等于 50MHz）高速放大器（大于等于 50MHz）

北京四方-280系列数字式保护(测控)装置说明书(0SF.451.069)_V2.0

2.7
输出触点容量............................................................................................................................ 4
2.8
装置主要技术参数.................................................................................................................... 4
3.2
装置功能组件概述.............................ห้องสมุดไป่ตู้...................................................................................... 6
3.3
交流插件（AC） ...................................................................................................................... 7
2.5
热性能（过载能力）................................................................................................................ 4
2.6
功率消耗 ................................................................................................................................... 4

MWP-T80-4的说明书

MWP-T80-4的说明书
支持热电偶、热电阻、电压、电流及二线制变送器输入；适合温度、压力、液位、长度等多种物理的测量与显示；可对各种非线性信号进行高精度的线性较正。

采用高亮度LED数码显示，同时采用高精度40线光柱显示，清晰直观。

的显示测量值。

支持多达四路报警功能，包括两路上限及两路下限报警，可独立报警
采用先进的无跳线技术，可自由更改分度号。

具有多种标准串行双向通讯功能（RS232C，RS485，RS422等）。

配智能数据采集器和基于WindowsXP平台的组态软件，可实现与上位机的联网。

面板说明
①指示灯：AHH--上上限报警
AH--上限报警AL--下限报警
ALL--下下限报警
②40段光柱：直观显示PV值的比例
③PV窗口：显示测量值，在参数设定状态下，显示参数符号或设定值
④设置键：用于进入参数设定状态，确认参数修改等
⑥数据增加键
⑦数据移位键。

SiP2804中文资料

APPLICATIONS
D D D D D Efficiency-Enhanced DC/DC Converter Modules Low Quiescent Current Standby Power Supplies Offline (AC/DC) Power Supplies Universal Input Power Supplies Buck, Boost, and Buck-Boost Converters
100% 50% 100% 100% 50% 50%
The SiP280X family controllers are available in both standard and lead (Pb)-free, SO-8 and TSSOP-8 packages, and are rated for operation over the industrial temperature range of --40 to 85 _C.
2
Document Number: 72660 S-41623—Rev.C, 30-Aug-04
元器件交易网
SiP2800/01/02/03/04/05
New Product
SPECIFICATIONS
Test Conditions Unless Specified Parameter
New Product
Currents are positive into, negative out of the specificed terminal.
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 in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ME2804最新中文版(2014版)

VIN (V)
3、DETECT, RELEASE VOLTAGE VS. AMBIENT TEMPERATURE
4、N-ch OUTPUT CURRENT VS. INPUT VOLTAGE
VDS=0.5V -VDET=1.1V -VDET=1.1V
VDET VS TEMP 1.25 1.2 1.15 1.1 1.05 1 -15 7 20 30 40 50 60 70 80 90 100 110 120 TEMP (℃ )
Max.
-VDET(S) ×1.02 -VDET(S) ×1.01 0.1 1 1 2 2 2 --
Units
-VDET -VDET（S）>2.2V VHYS VIN=2V (1.0V-1.5V)
V
V
VIN =3.5V (1.6V-2.5V) Supply Current ISS VIN=4.5V (2.6V-3.9V) VIN =6V VIN=7V Output Current Operating voltage Responding time Temperature characteristics Iout N-ch VIN
Functional Description：
1、 When input voltage (VIN) rises above detect voltage (–VDET), output voltage (VOUT) will be equal to VIN. 2、 When input voltage (VIN) falls below detect voltage (–VDET), output voltage (VOUT) will be equal to the ground voltage (VSS) level. 3、 When input voltage (VIN) falls to a level below that of the minimum operating voltage (VMIN), output will become unstable. In this condition, V IN will equal the pulled-up output (should output be pulled-up.) 4、 When input voltage (VIN) rises above the ground voltage (VSS) level, output will be unstable at levels below the minimum operating voltage (VMIN). Between the VMIN and detect release voltage (+VDET) levels, the ground voltage (VSS) level will be maintained. 5、 When input voltage (VIN) rises above detect release voltage (+VDET), output voltage (VOUT) will be equal to VIN. 6、 The difference between +VDET and –VDET represents the hysteresis range.

PAM2804-Rev1.0

PAM2804
1A Step-Down Constant Current, High Efficiency LED Driver
Features
Efficiency up to 93% n n 180 μ A(TYP.) Quiescent Current n Output Current: Up to 1A n Internal Synchronous Rectifier n 1.5MHz Switching Frequency n Soft Start n Under-Voltage Lockout n Short LED Protection n Open LED Protection n Thermal Shutdown n 5-pin Small SOT23-5 Packages n Pb-Free Package
Power Analog Microelectronics , Inc
10/2010 Rev1.0
2
PAM2804
1A Step-Down Constant Current, High Efficiency LED Driver
Absolute Maximum Ratings
T A=25 °C , V IN=4.2V, Real WLED load, C IN=10µF, C O=10µF, L=4.7µH, unless otherwise noted.
PARAMETER Input Voltage Range Regulated Feedback Voltage Peak Inductor Current Quiescent Current Shutdown Current Oscillator Frequency Drain-Source On-State Resistance SW Leakage Current High Efficiency EN Threshold High EN Threshold Low EN Leakage Current Over Temperature Protection OTP Hysteresis SYMBOL VIN V FB IPK IQ ISD fOSC RDS(O N) ILSW η VEH VEL IEN OTP OTH ±0.01 150 30 1.5 0.3 VIN=5V No load VEN = 0V VO = 100% IDS=100mA P MOSFET N MOSFET 1.2 1.5 0.3 0.35 ±0.01 93 Test Conditions MIN 2.5 0.095 0.1 1.5 180 1 1.8 0.45 0.5 1 TYP MAX 6.0 0.105 UNITS V V A µA µA MHz Ω Ω µA % V V µA °C °C

SL2804数据手册

In MillimeterDsimensions
Min
Max
1.400
1.600
0.320
0.520
0.400
0.580
0.350
0.440
4.400
4.600
1.550 REF
2.300
2.600
3.940
4.250
1.500 TYP
3.000 TYP
0.900
1.200
Dimensions In Inches
Min
Max
0.055
0.063
0.013
0.197
0.016
0.023
0.014
0.017
0.173
0.181
0.061 REF
0.091
0.102
0.155
0.167
0.060TYP
0.118TYP
0.035
0.047
７ｏｆ７
特性：
最高效率:95% 最高工作频率:300KHz 低静态电流：15uA 输出电压:2.5V～5.0V（步进 0.1V）输出精度:±2.5% 输入电压：0.9V～5.0V 低纹波，低噪声
管脚功能：
SL2804
SL2804
SL2804 SL2804
VOUT 3
SL2804 (SOT-23-3)
1
2
GND
5.0
V
0.8
V
V
%
90
94
%
800
1000
mA
15
uA
L
VIN Cin +-
47uH 100uF
VOUT
LX

P2804ND5G中文资料

1 2
N-Ch P-Ch N-Ch P-Ch N-Ch P-Ch 42 55 30 52
1.2 -1.2
V
nS
Qrr
nC
Pulse test : Pulse Width ≤ 300 µsec, Duty Cycle ≤ 2%. Independent of operating temperature. 3 Pulse width limited by maximum junction temperature. REMARK: THE PRODUCT MARKED WITH “P2804ND5G”, DATE CODE or LOT # Orders for parts with Lead-Free plating can be placed using the PXXXXXXG parts name.
790 690 175 310 65 75 16 14 2.5 2.2 2.1 1.9
988 863 245 430 98 113 pF
Output Capacitance
Coss
Reverse Transfer Capacitance Total Gate Charge2 Gate-Source Charge2 Gate-Drain Charge2
TO-252-5 (DPAK) MECHANICAL DATA
mm Dimension Min. A B C D E F G 9.0 2.1 0.4 1.1 0.4 0.00 5.3 5.5 Typ. 9.5 2.3 0.5 1.2 0.5 Max. 10.0 2.5 0.6 1.3 0.6 0.3 5.7 H I J K L M N Dimension Min. 1.3 6.3 4.8 0.8 0.3 1.1 Typ. 1.5 6.5 5.0 1.3 0.5 1.3 Max. 1.7 6.7 5.2 1.8 0.7 1.5 mm

2804中文

功率与温度曲线
集电极最大电流与占空比曲线
输入电流与输入电压曲线 ULN2802A
输入电流与输入电压曲线 ULN2803A
输入电流与输入电压曲线 ULN2804A
输入电流与输入电压曲线 ULN2805A
0 0
C C
电参数(Tmb=250C除非另有说明)
符号
参数含义
测试条件 VCE = 50V Tamb = 70°C, VCE = 50V
最典最小型大值值值
50 100
单位
μA
ICEX
漏电流输出
符号
参数含义
测试条件 Tamb = 70°C 对于ULN2802A VCE = 50V Vi=6V Tamb = 70°C 对于ULN2804A VCE = 50V Vi=1V
最典最小型大值值值
500
单位
ICEX
漏电流输出
μA 500
符号
参数含义
测试条件 IC = 100mA IB = 250µA IC = 200mA IB = 350µA IC = 350mA IB = 500µA ULN2801A VCE=2V IC = 350mA
最小值
典最型大值值
0.9 1.1 1.3 1.1 1.3 1.6
单位
VCE(sat)
集电极发射极饱和电压
V
hFE
1000
符号
参数含义
测试条件 ULN2802A Vi=17V ULN2803AVi=3.85V
最典小型值值
最大值
单位
0.82 1.25 0.93 1.35 0.35 1 1.5 0.5 1.45 2.4 mA

威世 2805 4 象限 pwm 运动控制器用户手册说明书

4-Quadrant PWMFor combination with:Brushless DC-ServomotorsMotion ControllerGeneral information 1) Can be changed over the RS232 port (factory setting: command velocity is analog).2)Preset value. Can be changed over the RS232 port.Note: The Motion Controller is supplied with detailed operating instruction manual for easy installation and start-up.The MCBL 2805 was designed for Faulhaber brushless DC-Servomotors with linear hall sensors. This means that, even without an external encoder, low speed and positioning with a resolution up to 1/1000th of a revolution is possible. The motion controller is based on a power-ful 16-Bit micro controller with excellent ﬁ ltering quality. Maximum Power:Velocity Control: High performance speed synchronization andthe lowest possible torque variance even in the most demanding of applications. A PI-controller makes sure that the command position is accurately achieved. Velocity Proﬁ les: Ramping, triangular, trapezoidal, and more complex combined motion proﬁ les are available to the user.Positioning Mode: Positioning with high resolution including limit switches and zero referencing.Additional Modes: For example, Stepper Motor Mode, to synchro-nize multiple motors.Torque Controlling: Achieved through current limiting. Saving and Running Program Sequences: For stand-alonep ositioning applications and to relieve the host PC.Modern Technology in Miniature Format:High efﬁ ciency Ampliﬁ er with high range PWM frequencies Power MOSFETS with low input resistanceUnique temperature supervision of the power MOSFETS Powerful 16-bit micro controller RS232 InterfaceOn-board memory (EEPROM)Inputs and Outputs:Command Value Input: For inputing command speed values in digital or analog form. This input can also interpret a reference mark signal. Depending on the mode, a frequency signal or an incremental encoder can be connected at this input.Fault Output (Open Collector): This output can also be programmed as a direction of rotation input, a digital input, or a reference mark input. RS232 Interface: For connecting a host PC and controlling program sequences.An additional digital input.The inputs are suitable for controlling program sequences.Speciﬁ cations subject to change without notice1628 T 012 B K11551628 T 024 B K11552036 U 024 B K11552444 S 024 B K11553056 K 012 B K11553056 K 024 B K11553564 K 024 B K1155OptionsFaulhaber offers the optional Multiplexer Board to operate mul-tiple motion controllers from one host PC.To accomodate the customers specialized needs we offer factory preconﬁ guring of modes and parameters to ﬁ t the application. The Faulhaber Motion Manager is available for download from the internet at or upon request.Adapters for IE2 – xx Encoders allow for simple attatchment to mounting railings.Ordering informationThis Motion Controller is exclusively d esigned for the control of the following motors and can be ordered with motor or on its own.K1155 indicates motor with linear Hall sensors for implementation with MCBL 2805.Note: the no-load speed is approx. 20% lower when used in combination with the MCBL 2805.ProgrammingA complete ASCII command set is available for programming and operating the motion controllers. All that is necessary is a terminal program such as the ‘hyperterminal’ provided with the Windows operating system. The Faulhaber Motion Manager program is available for users of Windows 95/98/ME and NT, 2000, XP . This program makes conﬁ guration and operation easy and allows the user to perform an online graphic analysis of the performance of the drive.Additional Modes Stepper Motor Mode Gearing ModeAnalog Voltage Positioning Mode External EncoderVoltage Regulator ModeSpeciﬁ cations subject to change without notice。

mp2984中文规格书

mp2984中文规格书英文回答：MP2984 Data Sheet (Chinese Version)。

The MP2984 is a low-power, step-down, switching regulator with an integrated inductor. It is ideal for battery-powered applications due to its high efficiency and compact size. The MP2984 is available in a variety of package options, including a 5-pin SOT-23 package and a 6-pin SOT-23 package.The MP2984 has a wide input voltage range of 2.3V to 6.5V, and it can deliver an output voltage as low as 0.6V. The MP2984 is also highly efficient, with a typical efficiency of over 90%.The MP2984 is easy to use, and it requires only a few external components. The MP2984 is a great choice for battery-powered applications where size, efficiency, andease of use are important.Features:Input voltage range: 2.3V to 6.5V.Output voltage range: 0.6V to VIN.Output current: up to 1A.High efficiency: up to 94%。

VersaMax 28-点微型PLC说明书

6.11IC200UDR01028-Point Micro PLC, (16) 24Vdc In, (1) 24Vdc Out, (11) Relay Out, 24Vdc PSIC200UDR22828-Point Micro PLC, (16) 24 VC In, (1) 24Vdc Out, (11) Relay Out, 12/24Vdc PSVersaMax Micro PLCs IC200UDR010 and IC200UDR228 accept sixteen DC inputs and provide one DC output and eleven normally-open 2 Amp relay outputs. The only differences between these modules are their power supplies and the output current rating of their Q1 DC output. Micro-28 IC200UDR010 uses +24Vdc nominal input power, and provides a 450mA, 24Vdc output. Micro-28 IC200UDR228 uses +12/24Vdc nominal input power, and provides a 100mA, 24Vdc output.6.11.1DC PowerThe DC power supply requires more current at startup voltage (approximately 4Vdc) than at rated input voltage. A minimum of 2.0 A is required to start up the DC power supply.If configured to disable power-up diagnostics, the PLC begins logic solution 100ms after the voltage level of the power supply input reaches and maintains nominal DC power. The power source for the PLC must have enough transient current capability to support the inrush current of the power supply and to maintain an adequateVdc voltage level (see specifications for inrush requirements).6.11.2DC InputsThe sixteen configurable DC inputs can be used as positive or negative logic standard inputs or up to three High-Speed Counter inputs. Inputs are compatible with a wide range of input devices, such as pushbuttons, limit switches, and electronic proximity switches.The Micro PLC’s +24Vdc supply can be used for input devices and to power the DC input circuits at about 7.5 mA per input. The combination of input circuit current and external device current must not exceed 200 mA.6.11.3DC Output (Q1)The DC output circuit (Q1) can be configured to be a standard, High-Speed Counter, pulse train, or PWM output.6.11.4Relay Outputs (Q2 – Q12)Eleven Form A relay outputs (SPST-single pole single throw) can control a wide range of load devices such as motor starters, solenoids, and indicators. The switching capacity of each of these circuits is 2 amps. An external source of AC or DC power must be supplied to operate field devices. Relay outputs cannot be used as Pulse Train or PWM outputs.6.11.5Micro PLC IC200UDR010, IC200UDR228 SpecificationsWeight 500 grams (1.10 lbs.)Inputs Sixteen 24Vdc positive/negative logic input circuitsOutputs Eleven normally-open 2 amp relay circuits and One DC Output (Q1)High-Speed Counters Up to four Type A or one Type A and one Type B+24Vdc Output Power Supply 200mA maximum (for input circuits and user devices)Thermal Derating IC200UDR010: none. IC200UDR228: no derating to 45 degrees C. Above 45degrees C, number of points on at the same time must not exceed 50%. DC Power SpecificationsRange IC200UDR010: 24Vdc -20%, +25%IC200UDR228: 9.2 to 30VdcHold-up IC200UDR010: 10ms at 19.2VdcIC200UDR028: 5msInrush Current IC200UDR010: 1 Amp maximum at 30VdcIC200UDR228: 13 Amps at 12Vdc, 27 Amps at 24VdcInrush Time 10mS for 1 AInput Current IC200UDR010: 0.30 Amp typical at 24VdcIC200URD228: 1.1 Amp typical at 12Vdc; 0.55 Amp typical at 24VdcInput Power Supply Rating 8WDC Input SpecificationsNumber of Inputs 16Rated Input Voltage 24 volts DCInput Voltage Range 0 to 30 volts DCInput Current 7.5mA typicalInput Resistance 2.8 kΩInput Threshold Voltage ON: 15Vdc minimum, OFF: 5Vdc maximumInput Threshold Current ON: 4.5mA maximum, OFF: 1.5mA minimumResponse Time 0.5 to 20ms configurable as regular input; 100µs as HSC inputIsolation Voltage 1500V RMS field side to logic side, 500V RMS between groupsDC Output SpecificationsOutput logic Positive LogicOperating Voltage IC200UDR010: 24Vdc / 12Vdc / 5Vdc; IC200UDR228: 24Vdc / 12Vdc Voltage Range IC200UDR010: 24Vdc, +20%, -80%; IC200UDR228: 23.5 - 24.5Vdc Output Current IC200UDR010: 450mA; IC200UDR228: 100mA Maximum UL Pilot Duty Rating 0.75A at 24VdcMaximum Resistive Load Rating 0.75A at 24Vdc; 0.5A at 12Vdc; 0.25A at 5VdcOutput Voltage Drop 0.3Vdc maximumResponse ON: 0.1ms maximum (24Vdc, 0.2A), OFF: 0.1ms maximum (24Vdc, 0.2A) OFF state leakage 0.1mA maximumIsolation 1500Vac between field side and logic side, 500Vac between groups Fuse Output should be fused externally. Otherwise, a load short can damage themodule output transistor, which is not user replaceable.Relay Output Specifications Operating Voltage 5 to 30Vdc or 5 to 250VacIsolation 1500 V RMS between field side and logic side, 500 V RMS between groups Leakage Current15 mA at 240Vac maximum Maximum UL Pilot Duty Rating 2 amps at 24Vdc and 240Vac Maximum Resistive Load Rating 2 amps at 24Vdc and 240Vac Minimum Load 1 mAMaximum Inrush 5 amps per half cycleResponse TimeON: 15 ms maximum, OFF: 15 ms maximum Contact Life: Mechanical 20 x 106 mechanical operationsContact Life: Electrical Voltage 240Vac, 120Vac, 24VdcCurrent: Resistive 2A Current: Lamp and Solenoid0.6ATypical Operations200,000High-Speed Counter Input / PWM and Pulse-Train Output Specifications Maximum Counter Frequency 10kHzInput Voltage ON: 15V, OFF: 5VCount Pulse Width 20% to 80% duty cycle at 10kHz Count Registers 16bitsOutputs Load VoltageQ1: IC200UDR010 = 5/12/24V; IC200UDR228 = 12/24V Q2-Q4: See Relay output specificationsMaximum Pulse/PWM Frequency (Q1 only) 5kHz Types availableUp to four HSC outputs or three HSC outputs plus one PT/PWM output.6.11.6 Wiring Diagram IC200UDR010, IC200UDR228SourceUDR228 12/24VDCPower Source。

四维测试仪280SI系列产品说明书

Automatic4D_280SI_brochure_rev1.4.pptModel 280SIFOUR DIMENSIONS INC.Four-Point Probe Model 280I Series280PI This is the most basic model in this series. It can automatically measure 1, 5, and 9 sites and then print the measured data, mean, and range on a 2 1/4inch tape. The measurement range is 1m Ω/sq. to 800 k Ω/sq.It has the function of 280PI plus ability to display in V/I, ohm-cm, and standard deviation. It stores up to 15 user-defined measurement programs and comes with a small external computer with keypad and LCD display.This model is PC controlled with Windows based powerful software which includes operation administration, recipe set-up, Librarian data storage, increased storage capacity, contour and 3D mapping, trend charts, P-N type detection, SECS-II, diagnostics, and many other convenient features.It has the same function as 280SI plus temperature compensation.It has the same function as 280TSI, in addition, it has Statistical Process Control (SPC)It has the same function as 280SI, but with an extended measurement range up to 8E9 Ω/sq., or 8E11 Ω/sq..It has the same function as 280TCI plus an easily controllable hot chuck and high temperature chamber.280PCI 280SI 280TSI 280TCI 280DI 280HCIOther Four-Point Probe Series:120 Series………Manual Four-Point Probe forWafers, Ingots and Slugs233AC……..…...Four-Point Probe System for up to 200mmWafers with C2C Handling Capability300 Series………Including Models 300, 333A, 333ACand 333AF for Mapping and/or C2C Handling of 300mm Wafers680I Series……..Sheet Resistivity Mapping Systemfor Compound Semiconductors such as GaAs and SiC1100I Series……Sheet Resistivity Mapping for Flat PanelsModel 233AC•Tests High-Resistivity thick Si Substrate •Tests Wafer Within 0.3ºC of RoomTemperature (Temperature compensation option available for the case of unstable room temperatures.)•Measure Resistivity in wide Temperature range, Features Room Temperature to 100 ºC within 0.5ºC Temperature Uniformity •SECS II Communication •Statistical Process Control•Adopting Solar Cell Sized WafersSystems installed worldwide exceeding MTBF of 5,000 hours•Convenience of Windows •Friendly User-Interface•Data Storage for Millions of Data Sets •Librarian Data Searching Program for Quick and Easy Retrieval•LAN, Excel & Many Other Great Features !•Individual Site Multiplier•Measurement Unit Conversion from the stored data•Site Dependent Geometric Correction •Detecting P-N Type•Cartesian-Arrayed Mapping •Polar Coordinated Mapping •Diameter Scan •Custom Test Sites•Automatic Thickness Compensation •Thin Metal Film Corrections •Personalized Recipe Options•Capable of Making Measurements without Computer•Standard Resistor Network and Firmware Allowing Easy and Quick Electronic Calibration•Assembled with Easily Replaceable Modules•Optional Trouble Shooting Kits Available for Quick and Easy On-Site Trouble Shooting•Diagnostic Program Available for Hardware and Software•Low Price Precision Durable Probe HeadA probe stage for Model 120。

华为LTE CPE eA280-204产品说明书

HUAWEI LTE CPE eA280-204 Product DescriptionIssue V1.2Date 2017-08-28Copyright © Huawei Technologies Co., Ltd. 2017. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.Trademarks and Permissionsand other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders.NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.HUAWEI TECHNOLOGIES CO., LTD.Address:HQ of HuaweiBantian, Longgang District Shenzhen 518129 People's Republic of ChinaWebsite: Email:******************Product Description ContentsContents1 Overview (4)2 Application Scenarios (6)3 Technical Specifications (8)3.1 Hardware (8)3.2 Antenna (10)3.3 Software (10)3.4 Accessories and software (13)3.4.1 LTE antenna： (13)3.4.2 WiFi antenna： (13)3.4.3 Power Adapter： (13)3.4.4 Software version： (13)4 Services and Applications (14)5 Reference Standards (15)6 Packing List (16)7 Acronyms and Abbreviations (17)1 OverviewIntroductionHuawei eA280-204 CPE is the wireless gateway of LTE. The eA280-204 can be deployedindoors to provide services such as data collection and video surveillance. CPE is short forcustomer premises equipment.The eA280-204 supports 3GPP R11/R12. The eA280-204 provides the following functions:●Data service●V oice service●Security service●Local and remote maintenance and management●Data routingHighlightsThe eA280-204 supports the following specifications:●LTE Band 31（452.5~457.5MHz，462.5~467.5MHz）●1T2R configuration●Internal LTE antenna●WLAN 2.4 GHz (802.11b/g/n) for an internal Wi-Fi antenna●WPS 2.0●2x2 MIMO●LTE DL Category 6 and UL Category 5●Two Ethernet ports●V oIP services●Dynamic Host Configuration Protocol (DHCP) and Network Address Translation (NAT)●Routing Behind MS●VxLAN●L2VPN over GRE●L2TP●Two APNs (one for voice services and the other for data services)●UE direct connecting●Soft SIM cards●Frequency lock●Firewall●IE, Firefox, Chrome, and Safari●Management on the Web UI●Device management complying with TR-069●LED indicatorsExteriorFigure 1-1 shows the exterior of the eA280-204.Figure 1-1eA280-204 exterior2 Application Scenarios The eA280-204 is designed to provide users with wireless broadband data access services in the wISP market.The eA280-204 provides LTE wireless routing and exchanges data between LTE wireless networks and wired Ethernet networks.SOHO users can set up either wired or wireless connections to the eA280-204 to achievehigh-speed services.The eA280-204 allows 32 Wi-Fi devices (2.4 GHz) to provide wireless network connections and connects to hubs and switches to form a local area network (LAN).Figure 2-1eA280-204 connected to multiple devicesThe eA280-204 provides one port for connecting a telephone to perform basic voice services.Figure 2-2eA280-204 connected to a telephone3 Technical Specifications3.1 HardwareTable 3-1 lists the hardware specifications of the eA280-204.Table 3-1Hardware specificationsIt is recommended that the eA280-204 be deployed on the live network within three months after delivery or be stored in the following environment:●Temperature: –10°C to 35°C●Relative humidity: 30% RH to 85% RHThe storage environment should be equipped with temperature, humidity, and dehumidification devicesto monitor and adjust the temperature and humidity.3.2 AntennaTable 3-2Specifications of an internal LTE antennaTable 3-3Specifications of an internal Wi-Fi antenna3.3 SoftwareTable 3-4 lists the software specifications of the eA280-204.Table 3-4Software specifications3.4 Accessories and software3.4.1 LTE antenna：3.4.2 WiFi antenna：3.4.3 Power Adapter：3.4.4 Software version：eA280-204 software version is V100R001.Product Description 4 Services and Applications4 Services and ApplicationsData ServiceThe eA280-204 provides access to LTE wireless broadband networks with high-speed dataservices.Voice ServiceThe eA280-204 can provide high-quality V oIP services by connecting to a common telephone.It can also provide supplementary services enabled on the operator side, such as call waiting,call holding, and call transferring.Security ServiceThe eA280-204 provides firewall functions which enable users to protect their computerswhen accessing the Internet.FirewallThe following firewall functions are provided:●Firewall switch: Enable or disable the firewall.●LAN MAC address filtering: Prevent devices with specified MAC addresses on a LANfrom accessing the network.●LAN IP address filtering: Prevent devices with specified IP addresses from accessingcomputers on the LAN.●URL filtering: Prevent computers on the LAN from visiting specified URLs.Local Management and MaintenanceThe eA280-204 supports local configuration to manage devices, configure networkparameters, and help ensure that the device functions properly and stably.Remote Management and MaintenanceThe eA280-204 allows users to remotely manage connected devices complying with TR-069on the Web UI.Product Description 5 Reference Standards5 Reference StandardsCommunication StandardsTable 5-1 lists the communication standards that the eA280-204 complies with.Table 5-1eA280-204 communication standardsWireless Interface ProtocolsAs to the Uu interface, the eA280-204 complies with 3GPP R11/R12.Product Description 6 Packing List6 Packing ListTable 6-1 describes the packing list for the eA280-204.Table 6-1eA280-204 packing list7 Acronyms and Abbreviations This chapter lists the acronyms and abbreviations related to the eA280-204.Table 7-1Acronyms and abbreviations。

MEMORY存储芯片TMS320F28034PNT中文规格书

DMA 132TMS320C6745,TMS320C6747SPRS377F –SEPTEMBER 2008–REVISED JUNE 2014Submit Documentation FeedbackProduct Folder Links:TMS320C6745TMS320C6747Peripheral Information and Electrical Specifications Copyright ©2008–2014,Texas Instruments Incorporated6.17Serial Peripheral Interface Ports (SPI0,SPI1)Figure 6-36is a block diagram of the SPI module,which is a simple shift register and buffer plus control logic.Data is written to the shift register before transmission occurs and is read from the buffer at the end of transmission.The SPI can operate either as a master,in which case,it initiates a transfer and drives the SPIx_CLK pin,or as a slave.Four clock phase and polarity options are supported as well as many data formatting options.Figure 6-36.Block Diagram of SPI ModuleThe SPI supports 3-,4-,and 5-pin operation with three basic pins (SPIx_CLK,SPIx_SIMO,and SPIx_SOMI)and two optional pins (SPIx_SCS,SPIx_ENA).The optional SPIx_SCS (Slave Chip Select)pin is most useful to enable in slave mode when there are other slave devices on the same SPI port.The C6745/6747will only shift data and drive the SPIx_SOMI pin when SPIx_SCS is held low.In slave mode,SPIx_ENA is an optional output.The SPIx_ENA output provides the status of the internal transmit buffer (SPIDAT0/1registers).In four-pin mode with the enable option,SPIx_ENA is asserted only when the transmit buffer is full,indicating that the slave is ready to begin another transfer.In five-pin mode,the SPIx_ENA is additionally qualified by SPIx_SCS being asserted.This allows a single handshake line to be shared by multiple slaves on the same SPI bus.In master mode,the SPIx_ENA pin is an optional input and the master can be configured to delay the start of the next transfer until the slave asserts SPIx_ENA.The addition of this handshake signal simplifies SPI communications and,on average,increases SPI bus throughput since the master does not need to delay each transfer long enough to allow for the worst-case latency of the slave device.Instead,each transfer can begin as soon as both the master and slave have actually serviced the previous SPI transfer.Although the SPI module supports two interrupt outputs,SPIx_INT1is the only interrupt connected on this device.138TMS320C6745,TMS320C6747SPRS377F –SEPTEMBER 2008–REVISED JUNE 2014Submit Documentation FeedbackProduct Folder Links:TMS320C6745TMS320C6747Peripheral Information and Electrical Specifications Copyright ©2008–2014,Texas Instruments Incorporated(1)These parameters are in addition to the general timings for SPI master modes (Table 6-55).(2)P =SYSCLK2period (3)Figure shows only Polarity =0,Phase =0as an example.Table gives parameters for all four master clocking modes.(4)In the case where the master SPI is ready with new data before SPI0_ENA deassertion.(5)Except for modes when SPIDAT1.CSHOLD is enabled and there is additional data to transmit.In this case,SPI0_SCS will remainasserted.(6)This delay can be increased under software control by the register bit field SPIDELAY.T2CDELAY[4:0].(7)If SPI0_ENA is asserted immediately such that the transmission is not delayed by SPI0_ENA.(8)In the case where the master SPI is ready with new data before SPI0_SCS assertion.(9)This delay can be increased under software control by the register bit field SPIDELAY.C2TDELAY[4:0].(10)If SPI0_ENA was initially deasserted high and SPI0_CLK is delayed.Table 6-58.Additional (1)SPI0Master Timings,5-Pin Option (2)(3)No.PARAMATERMIN MAX UNIT 18t d(SPC_ENA)M Max delay for slave todeassert SPI0_ENA after finalSPI0_CLK edge to ensuremaster does not begin thenext transfer.(4)Polarity =0,Phase =0,from SPI0_CLK falling0.5t c(SPC)M +P +5ns Polarity =0,Phase =1,from SPI0_CLK falling P +5Polarity =1,Phase =0,from SPI0_CLK rising0.5t c(SPC)M +P +5Polarity =1,Phase =1,from SPI0_CLK risingP +520t d(SPC_SCS)M Delay from final SPI0_CLKedge tomaster deassertingSPI0_SCS (5)(6)Polarity =0,Phase =0,from SPI0_CLK falling0.5t c(SPC)M +P -3ns Polarity =0,Phase =1,from SPI0_CLK falling P -3Polarity =1,Phase =0,from SPI0_CLK rising0.5t c(SPC)M +P -3Polarity =1,Phase =1,from SPI0_CLK risingP -321t d(SCSL_ENAL)M Max delay for slave SPI to drive SPI0_ENA valid after master asserts SPI0_SCS to delay themaster from beginning the next transfer,C2TDELAY +P ns 22t d(SCS_SPC)M Delay from SPI0_SCS activeto first SPI0_CLK (7)(8)(9)Polarity =0,Phase =0,to SPI0_CLK rising2P -5ns Polarity =0,Phase =1,to SPI0_CLK rising 0.5t c(SPC)M +2P -5Polarity =1,Phase =0,to SPI0_CLK falling2P -5Polarity =1,Phase =1,to SPI0_CLK falling0.5t c(SPC)M +2P -523t d(ENA_SPC)M Delay from assertion ofSPI0_ENA low to firstSPI0_CLK edge.(10)Polarity =0,Phase =0,to SPI0_CLK rising3P +3.6ns Polarity =0,Phase =1,to SPI0_CLK rising 0.5t c(SPC)M +3P +3.6Polarity =1,Phase =0,to SPI0_CLK falling3P +3.6Polarity =1,Phase =1,to SPI0_CLK falling0.5t c(SPC)M +3P +3.6。

IRF2804中文资料

VGS(th)
Gate Threshold Voltage
40 ––– ––– ––– 0.031 ––– ––– 1.5 2.0 ––– 1.8 2.3 2.0 ––– 4.0
V VGS = 0V, ID = 250µA V/°C Reference to 25°C, ID = 1mA
f mΩ VGS = 10V, ID = 75A f VGS = 10V, ID = 75A
Coss
Output Capacitance
Coss
Output Capacitance
Coss eff.
Effective Output Capacitance
Diode Characteristics
Parameter
IS
Continuous Source Current
––– 6450 ––– ––– 1690 ––– ––– 840 ––– ––– 5350 ––– ––– 1520 ––– ––– 2210 –––
and center of die contact
S
pF VGS = 0V
VDS = 25V
ƒ = 1.0MHz, See Fig. 5
VGS = 0V, VDS = 1.0V, ƒ = 1.0MHz VGS = 0V, VDS = 32V, ƒ = 1.0MHz VGS = 0V, VDS = 0V to 32V
RθJC RθCS RθJA RθJA
Junction-to-Case Case-to-Sink, Flat, Greased Surface
Junction-to-Ambient
j Junction-to-Ambient (PCB Mount, steady state)

PAM2804应用方案

内部资料内部资料DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P .A.M2. PAM2804 性能介绍PAM2804是降压型LED 驱动器，当输入电压低于LED 正向压降时，PAM2804会工作于LDO 模式。

PAM2804的工作电压从2.5V 到6V ，可以使用单节锂电池，3AA 或4AA 电池， USB 或其他一些电源模式。

反馈电压仅0.1V ，可以得到更高的效率。

PAM2804内建同步功率器件可以减少周边元器件并实现高效率。

在关闭模式下，输出与输入断开，输入电流小于1uA 。

另外芯片有欠压保护，有助于防止锂电池额深度放电。

3. 特色1. 效率高达93%2. 180uA 静态工作电流3. 最大1A 恒流输出电流4. 内部同步开关5. 1.5MHz 工作频率6. 软启动7. 欠压保护8. LED 短路保护9. LED 开路保护 10. 热保护11. SOT23-5小型封装 12. 无铅封装4. 应用范围3AA 或4AA 电池供电手电筒内部资料内部资料考虑到整个温度及电压范围内的稳定性，电容的材质要使用X7R， X5R，或其它更好的材质。

Y5V的电容材质会导致工作稳定性不佳要尽量避免使用。

(3)电感的选择PAM2804通常使用的感量为4.7uH。

电感必须尽可能的靠近芯片并且保证到SW引脚的引线阻抗足够小。

电感的饱和电流必须大于流过的峰值电流，额定电流必须大于最大输出的平均电流。

由于电感一般都是外购，必须关注的几个问题：电感量，体积尺寸，额定电流，饱和电流。

在尺寸确定的情况下感量越大额定电流就会越小。

关于饱和电流，一般厂商定义其为电感量下降10%-30%左右的电流，因此其饱和电流值必须大于流过的峰值电流10%-30%以上，以确保工作的稳定性。

(4)LED短路保护当LED短路时，由于电流检测电阻的存在，PAM2804 会工作于低频开关状态，此时不会损坏开关管。

bmp280指标 -回复

bmp280指标-回复bmp280是一种数字气压传感器，具有高精度和低功耗的特点。

它广泛应用于气象、工业自动化、室内外环境监测等领域。

本文将从什么是bmp280、其工作原理、主要指标、应用领域和未来发展趋势等方面逐步介绍bmp280。

什么是bmp280？bmp280是一种数字气压传感器，由德国博世公司研发。

它利用微机电系统（MEMS）技术实现了高精度的气压测量。

该传感器内置了温度补偿功能，能够输出修正后的气压数据。

它采用标准的I2C 和SPI接口，非常方便与各种主机进行通信。

同时，它还具有低功耗的特点，使其成为许多电池供电和便携设备的理想选择。

bmp280的工作原理是什么？bmp280采用了压阻测量原理。

它通过测量多个绘制在晶圆上的微小压阻传感器的电阻值，来获取大气压力的变化。

其中，温度补偿是非常重要的。

bmp280通过同时测量温度和压力，利用校正算法对压力数据进行补偿。

这种温度补偿可以解决由于温度变化引起的气压读数误差，使传感器的测量结果更加准确和可靠。

bmp280的主要指标有哪些？主要的指标包括测量范围、分辨率、精度、工作电压和功耗。

其中，测量范围是指bmp280能够测量的气压范围。

通常为从300到1100 hPa。

分辨率是指bmp280能够分辨的最小气压变化。

通常为0.01 hPa。

精度是指bmp280测量结果与实际值之间的偏差，通常为±1 hPa。

工作电压是指bmp280正常工作所需的电压范围。

通常为1.8V到3.6V。

功耗是指bmp280在不同工作模式下的能耗。

通常为2.7 μA到3.6 μA。

bmp280的应用广泛，可以在许多领域发挥作用。

首先，它可以用于气象领域，用于气压的监测和预测。

气压的变化与天气的变化有着密切关系，bmp280可以提供准确的气压数据，为天气预报提供依据。

其次，bmp280可以用于工业自动化领域，用于检测和控制气体压力。

在一些特定的工业过程中，对气压的监测和控制非常重要，bmp280可以帮助实现这一目标。