AD7524M中文资料

合集下载

AD7520中文资料

AD7520中文资料

数模(D/A)转换器基础知识在电子技术中,模拟量和数字量的相互转换非常重要。

例如,用电子计算机对生产过程进行控制时,必须先将模拟量转换成数字量,才能送到计算机中去进行运算和处理;然后又要将处理得出的数字量转换为模拟量,才能对被控制的模拟量进行控制。

另外,在数字仪表中,也必须将被测的模拟量转换为数字量才能实现数字显示。

能将模拟量转换为数字量的电路称为模数转换器,简称A/D转换器或ADC;能将数字量转换为模拟量的电路称为数模转换器,简称D/A转换器或DAC。

因此,模数转换器和数模转换器是沟通模拟电路和数字电路的桥梁,也可称之为两者之间的接口。

实际上,在数据传输系统、自动测试设备、医疗信息处理、电视信号的数字化、图像信号的处理和识别、数字通信和语音信息处理等方面都离不开模数转换器和数模转换器。

数模转换器是将一组输入的二进制数转换成相应数量的模拟电压或电流输出的电路。

因为数字量是用二进制代码按数位组合起来表示的,对于有权码,每位代码都有一定的权。

所以,为了将数字量转换成模拟量,必须将每一位的代码按其权的大小转换成相应的模拟量,然后将代表各位的模拟量相加,所得的总模拟量就与数字量成正比,这样便实现了从数字量到模拟量的转换。

这就是组成数模转换器的基本指导思想。

数模转换器根据工作原理基本上可以分为二进制权电阻网络数模转换器和T形电阻网络数模转换器(包括倒T形电阻网络数模转换器)两大类。

权电阻网络数模转换器的优点是电路结构简单,可适用于各种有权码。

缺点是电阻阻值范围太宽,品种较多。

要在很宽的阻值范围内保证每个电阻都有很高的精度是极其困难的。

因此,在集成数模转换器中很少采用权电阻网络。

一、倒T形电阻网络数模转换器图11-1所示的是一个四位二进制数倒T形电阻网络数模转换器的原理图。

由图11-1可以看出,这种数模转换器是由倒T形电阻转换网络、模拟电子开关及运算放大器组成。

倒T形电阻网络也是由R和2R两种阻值的电阻构成的。

AD7524中文资料

AD7524中文资料

500
350
AC Feedthrough3 at OUT1 at OUT2
0.25
0.25
0.5
0.5
0.25
0.25
0.5
0.5
ns max
% FSR max % FSR max
OUT1 Load = 100 Ω, CEXT = 13 pF; WR, CS = 0 V; DB0–DB7 = 0 V to VDD to 0 V.
Data Setup Time
tDS AD7524J, K, L, A, B, C
135
60
170
AD7524S, T, U
135
60
170
Data Hold Time
tDH All Grades
10
10
10
120 30 30 120
+13.5 +1.5 ± 10 5 20
130 150
0
130 150
Parameter
Limit, TA = +25؇C
Limit, TMIN, TMAX1
VDD = +5 V VDD = +15 V VDD = 5 V VDD = +15 V Units
Test Conditions/Comments
STATIC PERFORMANCE Resolution Relative Accuracy J, A, S Versions K, B, T Versions L, C, U Versions Monotonicity Gain Error2 Average Gain TC3
VREF = ± 10 V, 100 kHz Sine Wave; DB0–DB7 = 0 V; WR, CS = 0 V

AD元器件英文对照

AD元器件英文对照

AD元器件英文对照1.电阻固定电阻:RES半导体电阻:RESSEMT电位计;POT变电阻;RV AR可调电阻;res12.电容定值无极性电容;CAP定值有极性电容;CAP半导体电容:CAPSEMI可调电容:CAPV AR3.电感:INDUCTOR4.二极管:DIODE.LIB发光二极管:LED5.三极管:NPN16.结型场效应管:JFET.lib7.MOS场效应管8.MES场效应管9.继电器:PELAY. LIB10.灯泡:LAMP 11.运放:OPAMP12.数码管:DPY_7-SEG_DP (MISCELLANEOUS DEVICES.LIB)13.开关;sw_pb原理图常用库文件:Miscellaneous Devices.ddbDallas Microprocessor.ddbIntel Databooks.ddbProtel DOS Schematic Libraries.ddbPCB元件常用库:Advpcb.ddbGeneral IC.ddbMiscellaneous.ddb部分分立元件库元件名称及中英对照AND 与门初学protel DXP 碰到最多的问题就是:不知道元件放在哪个库中。

这里我收集了DXP2004常用元件库下常见的元件。

使用时,只需在libary中选择相应的元件库后,输入英文的前几个字母就可看到相应的元件了。

通过添加通配符*,可以扩大选择范围。

下面这些库元件都是DXP 2004自带的不用下载。

########### DXP2004下Miscellaneous Devices.Intlib元件库中常用元件有:电阻系列(res*)排组(res pack*)电感(inductor*)电容(cap*,capacitor*)二极管系列(diode*,d*))IGBT*,jfet*,MESFET*,MOSFET*,mos*,pnp*,npn*三极管系列(.运算放大器系列(op*)继电器(relay*)8位数码显示管(dpy*)电桥(bri*bridge)光电耦合器( opto* ,optoisolator )光电二极管、三极管(photo*)模数转换、数模转换器(adc-8,dac-8)晶振(xtal)电源(battery)喇叭(speaker)麦克风(mic*)小灯泡(lamp*)响铃(bell)天线(antenna)保险丝(fuse*)开关系列(sw*)跳线(jumper*)变压器系列(trans*)(tube*)(scr)(neon)(buzzer)(coax)晶振(crystal oscillator)的元件库名称是Miscellaneous Devices.Intlib, 在search 栏中输入*soc即可。

AD5754资料

AD5754资料
APPLICATIONS
Industrial automation Closed-loop servo control, process control Automotive test and measurement Programmable logic controllers
GENERAL DESCRIPTION
元器件交易网
AD5724/AD5734/AD5754
TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3

AD9244中文资料

AD9244中文资料

AVDD
REFT REFB
DRVDD
AD9244
SHA
TEN
STAGE
PIPELINE
ADC
14
DFS
TIMING
OUTPUT REGISTER
OTR
REFERENCE
D13–D0 14
OEB
AGND CML VR VREF SENSE REF GND
DGND
GENERAL DESCRIPTION The AD9244 is a monolithic, single 5 V supply, 14-bit, 40 MSPS/65 MSPS analog-to-digital converter with an on-chip, high performance sample-and-hold amplifier and voltage reference. The AD9244 uses a multistage differential pipelined architecture with output error correction logic to provide 14-bit accuracy at 40 MSPS/65 MSPS data rates and guarantees no missing codes over the full operating temperature range.
PRODUCT HIGHLIGHTS Low Power—The AD9244, at 550 mW, consumes a fraction of the power of presently available ADCs in existing high speed solutions.

SG3844M中文资料

SG3844M中文资料

K E Y F E AT U R E S
s OPTIMIZED FOR OFF-LINE CONTROL s LOW START-UP CURRENT (<1mA) s AUTOMATIC FEED FORWARD COMPENSATION s TRIMMED OSCILLATOR DISCHARGE CURRENT s PULSE-BY-PULSE CURRENT LIMITING s ENHANCED LOAD RESPONSE CHARACTERISTICS s UNDER-VOLTAGE LOCKOUT WITH 6V HYSTERESIS (SG1844 only) s DOUBLE PULSE SUPPRESSION s HIGH-CURRENT TOTEM-POLE OUTPUT s INTERNALLY TRIMMED BANDGAP REFERENCE s 500kHz OPERATION s UNDERVOLTAGE LOCKOUT SG1844 - 16 volts SG1845 - 8.4 volts s LOW SHOOT-THROUGH CURRENT <75mA OVER TEMPERATURE
P
R O D U C T I O N
D
A T A
S
H E E T
A B S O L U T E M A X I M U M R AT I N G S
(Notes 1 & 2)
PACKAGE PIN OUTS
COM VFB ISENSE RT/CT
1 2 3 4 8 7 6 5
Supply Voltage (ICC < 30mA) ............................................................... Self Limiting Supply Voltage (Low Impedance Source) ........................................................ 30V Output Current (Peak) ....................................................................................... ±1A Output Current (Continuous) ....................................................................... 350mA Output Energy (Capacitive Load) ....................................................................... 5µJ Analog Inputs (Pins 2, 3) ................................................................. -0.3V to +6.3V Error Amp Output Sink Current ..................................................................... 10mA Operating Junction Temperature Hermetic (J, Y, F, L Packages) ................................................................... 150°C Plastic (N, M, D, DM Packages) ................................................................ 150°C Storage Temperature Range .......................................................... -65°C to +150°C Lead Temperature (Soldering, 10 Seconds) .................................................. 300°C

IRF7524D1GTRPBF;中文规格书,Datasheet资料

IRF7524D1GTRPBF;中文规格书,Datasheet资料

10
-I D , Drain-to-Source Current (A)
-I D , Drain-to-Source Current (A)
VGS -7.50V -5.00V -4.00V -3.50V -3.00V -2.50V -2.00V BOTTOM -1.50V TOP
1
1
0.1
0.1
-1.50V
PD -96176
IRF7524D1GPbF
l l l l l l l
Co-packaged HEXFET® Power MOSFET and Schottky Diode P-Channel HEXFET Low VF Schottky Rectifier Generation 5 Technology Micro8TM Footprint Lead-Free Halogen-Free
FETKYTM MOSFET & Schottky Diode
A A S G
1 2 3 4 8 7 6 5
K K D D
VDSS = -20V RDS(on) = 0.27Ω Schottky Vf = 0.39V
Top View
Description
The FETKYTM family of co-packaged HEXFETs and Schottky diodes offer the designer an innovative board space saving solution for switching regulator applications. Generation 5 HEXFETs utilize advanced processing techniques to achieve extremely low on-resistance per silicon area. Combining this technology with International Rectifier's low forward drop Schottky rectifiers results in an extremely efficient device suitable for use in a wide variety of portable electronics applications like cell phone, PDA, etc. The new Micro8 package, with half the footprint area of the standard SO-8, provides TM the smallest footprint available in an SOIC outline. This makes the Micro8 an ideal device for applications where printed circuit board space is at a premium. The low TM profile (<1.1mm) of the Micro8 will allow it to fit easily into extremely thin application environments such as portable electronics and PCMCIA cards.

ADGM1004 集成驱动器的0 Hz DC至13 GHz、 2.5 kV HBM ESD、SP

ADGM1004  集成驱动器的0 Hz DC至13 GHz、  2.5 kV HBM ESD、SP

Rev. DDocument FeedbackInformation furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks andregistered trademarks are the property of their respective owners.One Technology Way, P .O. Box 9106, Norwood, M A 02062-9106, U.S.A.Tel: 781.329.4700 © 2017–2019 Analog Devices, Inc. All rights reserved. Technical Support /cnADI 中文版数据手册是英文版数据手册的译文,敬请谅解翻译中可能存在的语言组织或翻译错误,ADI 不对翻译中存在的差异或由此产生的错误负责。

如需确认任何词语的准确性,请参考ADI 提供的最集成驱动器的0 Hz/DC 至13 GHz 、 2.5 kV HBM ESD 、SP4T MEMS 开关数据手册ADGM1004产品特性全性能工作频率低至0 Hz/dc 导通电阻:2.9 Ω(最大值) 关断泄漏:0.5 nA (最大值) −3 dB 带宽RF1、RF4为10.8 GHz (典型值) RF2、RF3为13 GHz (典型值) RF 性能特性插入损耗:0.45 dB (典型值,2.5 GHz ) 隔离度:24 dB (典型值,2.5 GHz ) IP3:67 dBm (典型值)RF 输入功率:32 dBm (最大值) 驱动寿命:10亿周期(最小值) 密封开关触点开关导通时间:75 μs (最大值) ESD HBM 额定值5 kV (对于RF1至RF4和RFC 引脚) 2.5 kV (对于所有其他引脚) 集成驱动器,无需外部驱动器 电源电压:3.0 V 至3.6 V CMOS/LVTTL 兼容 并行和SPI 接口 独立控制开关没有电源时,开关处于开路状态要求所有RF 引脚上避免出现浮空节点(参见“浮空节点”部分) 5 mm × 4 mm × 1.45 mm 、24引脚LFCSP 工作温度范围:0°C 至+85°C应用继电器替代方案自动测试设备(ATE):RF 、数字和混合信号 负载和探针板:RF 、数字和混合信号 RF 测试仪表可重复配置型滤波器和衰减器 高性能RF 开关概述ADGM1004是一款宽带、单刀四掷(SP4T)开关,采用ADI 公司的微型机电系统(MEMS)开关技术制造而成。

TDA7564BH中文资料

TDA7564BH中文资料

5.1 Faults availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6
Thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
14.4V, 1KHz, 10% THD, 4x50W max, power ■ Max. output power 4x72W/2Ω ■ Full I2C bus driving:
– St-by – Independent front/rear soft play/mute – Selectable gain (for low noise line output
4.2 Permanent diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3 Output DC offset detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4
Diagnostics functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Turn-on diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

LM2904M中文资料

LM2904M中文资料

-
0.8 2.0
-
0.8 2.0
-
0.8 2.0 mA
RL = ∞, VCC = 5V
- 0.5 1.2 - 0.5 1.2 - 0.5 1.2 mA
Large Signal Voltage Gain
VCC = 15V,
GV RL= 2kΩ
50 100 - 25 100 - 25 100 - V/mV
元器件交易网

LM2904,LM358/LM358A,LM258/ LM258A
Dual Operational Amplifier
Features
• Internally Frequency Compensated for Unity Gain • Large DC Voltage Gain: 100dB • Wide Power Supply Range:
Differential Input Voltage
VI(DIFF)
-
- - VCC - - VCC -
- VCC V
Note: 1. This parameter, although guaranteed, is not 100% tested in production.
3
元器件交易网
- - 7.0 - - 9.0 - - 10.0 mV
Input Offset Voltage Drift
∆VIO/∆T RS = 0Ω
- 7.0 - - 7.0 - - 7.0 - µV/°C
Input Offset
IIO
Current
-
- - 100 - - 150 - 45 200 nA
Input Offset Current Drift

液晶模块12864M中文资料

液晶模块12864M中文资料

12864M中文字库一、液晶显示模块概述12864M汉字图形点阵液晶显示模块,可显示汉字及图形,内置8192个中文汉字(16X16点阵)、128个字符(8X16点阵)及64X256点阵显示RAM(GDRAM)。

主要技术参数和显示特性:电源:VDD 3.3V~+5V(内置升压电路,无需负压);显示内容:128列× 64行显示颜色:黄绿显示角度:6:00钟直视LCD类型:STN与MCU接口:8位或4位并行/3位串行配置LED背光多种软件功能:光标显示、画面移位、自定义字符、睡眠模式等二、外形尺寸外观尺寸:93×70×12.5mm 视域尺寸:73×39mm外形尺寸图外形尺寸二、模块引脚说明逻辑工作电压(VDD):4.5~5.5V电源地(GND):0V工作温度(Ta):0~60℃(常温) / -20~75℃(宽温)三、接口时序模块有并行和串行两种连接方法(时序如下):8位并行连接时序图MPU写资料到模块MPU从模块读出资料2、串行连接时序图串行数据传送共分三个字节完成:第一字节:串口控制—格式 11111ABCA为数据传送方向控制:H表示数据从LCD到MCU,L表示数据从MCU到LCDB为数据类型选择:H表示数据是显示数据,L表示数据是控制指令C固定为0第二字节:(并行)8位数据的高4位—格式 DDDD0000第三字节:(并行)8位数据的低4位—格式 0000DDDD串行接口时序参数:(测试条件:T=25℃ VDD=4.5V)1、指令表1:(RE=0:基本指令集)指令表—2:(RE=1:扩充指令集)备注:1、当模块在接受指令前,微处理顺必须先确认模块内部处于非忙碌状态,即读取BF标志时BF需为0,方可接受新的指令;如果在送出一个指令前并不检查BF标志,那么在前一个指令和这个指令中间必须延迟一段较长的时间,即是等待前一个指令确实执行完成,指令执行的时间请参考指令表中的个别指令说明。

AD9954芯片资料中文版

AD9954芯片资料中文版

AD9954- Direct Digital Synthesizer400 MSPS 14-Bit, 1.8 V CMOS功能: (2)应用 (2)概述 (2)AD9954电气特性 (3)最大操作范围 (4)Table 2. (4)管脚定义 (4)管脚功能描述 (4)典型的性能特性 (6)原理 (7)器件块 (7)控制寄存器位描述 (10)Other Register Descriptions 其他寄存器描述 (14)Programming AD9954 Features-- AD9954编程特性 (18)SERIAL PORT OPERATION串口操作 (19)INSTRUCTION BYTE指令字节 (20)SERIAL INTERFACE PORT PIN DESCRIPTION串行接口管脚描述 (20)MSB/LSB TRANSFERS (20)RAM I/O VIA SERIAL PORT (21)Power-Down Functions of the AD9954 AD9954省电功能 (21)功能:400MSPS 内部时钟 集成14位DAC可编程相位/幅度抖动 32位控制字相位噪声小于等于-120dbc/Hz@1kHz(DAC 输出)出色的动态性能>80db SFDR@160MHz (偏离100KHz ) 串行I/O 口控制 超高速模拟比较器 自动线性和非线性扫频能力 4种频率/相位偏移坡面 1.8v 电压供电软件或者硬件控制休眠内部集成1024字节*32位RAM 大多数输入口支持5v 电平PLL REFCLK 乘法器(4倍-20倍) 单晶振驱动内部时钟 相位调制能力 多芯片同步 应用敏捷LO 频率输出 可编程的时钟发生器雷达和扫频系统中的FM 啁啾源自动雷达测试和测量设备 声光设备驱动概述AD9954具有一个14位DAC 最高达400 MSPS 的DDS 。

AD9954使用了先进的DDS 技术,内部集成高速,高性能的DAC 形成数字可编程,完整的高频合成器,能产生高达200MHz 模拟正弦波的能力。

AD7924中文资料

AD7924中文资料
VIN3
T/H
I/P MUX
8-/10-/12-BIT SUCCESSIVE APPROXIMATION
ADC
SHale Waihona Puke QUENCERCONTROL LOGIC
AD7904/AD7914/AD7924
GND
SCLK DOUT DIN CS
VDRIVE
PRODUCT HIGHLIGHTS 1. High Throughput with Low Power Consumption.
The AD7904/AD7914/AD7924 use advanced design techniques to achieve very low power dissipation at maximum throughput rates. At maximum throughput rates, the AD7904/AD7914/AD7924 consume 2 mA maximum with 3 V supplies; with 5 V supplies, the current consumption is 2.7 mA maximum.
元器件交易网
a
4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP
AD7904/AD7914/AD7924
FEATURES Fast Throughput Rate: 1 MSPS Specified for VDD of 2.7 V to 5.25 V Low Power:
The conversion time for the AD7904/AD7914/AD7924 is determined by the SCLK frequency, as this is also used as the master clock to control the conversion.

AD9854中文数据手册

AD9854中文数据手册

AD9854特征·300M内部时钟频率·可进行频移键控(FSK),二元相移键控(BPSK),相移键控(PSK),脉冲调频(CHIRP),振幅调制(AM)操作·正交的双通道12位D/A转换器·超高速比较器,3皮秒有效抖动偏差·外部动态特性:80 dB无杂散动态范围(SFDR)@ 100 MHz (±1 MHz) A OUT·4倍到20倍可编程基准时钟乘法器·两个48位可编程频率寄存器·两个14位可编程相位补偿寄存器·12位振幅调制和可编程的通断整形键控功能·单引脚FSK和BPSK数据输入接口·PSK功能可由I/O接口实现·具有线性和非线性的脉冲调频(FM CHIRP)功能,带有引脚可控暂停功能·具有过渡FSK功能·在时钟发生器模式下,有小于25 ps RMS抖动偏差·可自动进行双向频率扫描·能够对信号进行sin(x)/x校正·简易的控制接口:可配置为10MHZ串行接口,2线或3线SPI兼容接口或100MHZ 8位并行可编程接口·3.3V单电源供电·具有多路低功耗功能·单输入或差分输入时钟·小型80脚LQFP 封装应用·便携式频率特性分析仪·可编程时钟发生器·应用于雷达和扫频系统的脉冲调频信号源·测试和测量设备·商业和业余的射频(RF)发射机概述AD9854数字合成器是高集成度的器件,它采用先进的DDS技术,片内整合了两路高速、高性能正交D/A转换器通过数字化编程可以输出I、Q两路合成信号。

在高稳定度时钟的驱动下,AD9854将产生一高稳定的频率、相位、幅度可编程的正弦和余弦信号,作为本振用于通信,雷达等方面。

AD9854的DDS核具有48位的频率分辨率(在300M系统时钟下,频率分辨率可达1uHZ)。

2P4M中文资料(nec)中文数据手册「EasyDatasheet - 矽搜」

2P4M中文资料(nec)中文数据手册「EasyDatasheet - 矽搜」

DRM,
Tj = 125°C

Tj = 25°C

Tj = 125°C

dV D/dt Tj = 125°C, V DM = 2/3 V DRM
10

VTM ITM = 4 A

IGT VDM = 6 V, R L = 100 Ω,

栅极触发电压
Note
VGT VDM = 6 V, R L = 100 Ω,
1985, 2006
The revised points can be easily searched by copying an "现场:修订部分可以通过在 PDF文件中复制一个 “R”,并在 “查找内容 ”指定它可以很容易地搜索 .
芯片中文手册,看全文,戳
2P4M,2P6M
最大额定值
Note
IH VDM = 24 V, I TM = 4 A

1
3
mA 参照图9
电路改判关断时间
tq
Tj = 125°C, I TM = 500毫安,

30

μs

diR / DT = 15 A /μs, V R ≥ 25 V,
VDM = 2/3 V DRM ,DV D / dt的= 10V μ/ s
特性
符号
非重复性峰值反向电压 非重复性峰值断态电压 重复峰值反向电压 重复峰值断态电压
Note Note Note Note
VRSM VDSM VRRM VDRM
通态电流
IT (AV)
有效的通态电流 浪涌不重复通态电流 熔断电流
IT (RMS)
IT S M

i2

TLC7524中文资料

TLC7524中文资料

IMPORTANT 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 © 1995, Texas Instruments Incorporated。

DA转换器AD7520中文资料

DA转换器AD7520中文资料

AD7520 是十位 CMOS 数模转换器,采用倒 T 形电阻网络。

模开关是CMOS 型的,也同时集成在芯片上,但运算放大器是外接的。

管脚说明AD7520 共有 16 个引脚,各引脚的功能如下。

1 为模拟电流输出端,接到运算放大器的反相输入端。

管脚图2 为模拟电流输出端,一般接“ 地” 。

3 为接“ 地” 端。

4 ~ 13 为十位数字量的输入端。

14 为 CMOS 模拟开关的 +UDD 电源接线端。

15 为参考电压电源接线端,可为正值或负值。

16 为芯片内部一个电阻 R 的引出端,该电阻作为运算放大器的反馈电阻,它的另一端在芯片内部接端。

主要技术指标1 .分辨率分辨率用输入二进制数的有效位数表示。

在分辨率为位的数模转换器中,输出电压能区分个不同的输入二进制代码状态,能给出个不同等级的输出模拟电压。

分辨率也可以用数模转换器的最小输出电压 ( 对应的输入二进制数只有最低位为 1) 与最大输出电压 ( 对应的输入二进制数的所有位全为 1) 的比值来表示。

2 .转换精度数模转换器的转换精度是指输出模拟电压的实际值与理想值之差,即最大静态转换误差。

这误差是由于参考电压偏离标准值、运算放大器的零点漂移、模拟开关的压降以及电阻阻值的偏差等原因所引起的。

3 .输出建立时间从输入数字信号开始,到输出电压或输出电流到达稳定值时所需要的时间,称为输出建立时间。

目前,在不包含参考电压源和运算放大器的单片集成数模转换器中,建立时间一般不超过 1 。

4 .线性度通常用非线性误差的大小表示数模转换器的线性度。

产生非线性误差有两种原因:一是各位模拟开关的压降不一定相等,而且接和接地时的压降也未必相等;二是各个电阻阻值的偏差不可能做到完全相等,而且不同位置上的电阻阻值的偏差对输出模拟电压的影响又不一样。

此外还有电源抑制比、功率消耗、温度系数以及输入高、低逻辑电平的数值等技术指标。

慕课第10章拓展

慕课第10章拓展

集成DAC和集成ADC一、集成DAC1.集成DAC AD7524AD7524是采用R-2R倒T形电阻网络的8位CMOS DAC集成芯片,其功耗只有20mW,供电电压V可在+5~+15V范围内选择,基准电压可正、可负。

该电压的极性改变时,输出电压极性也相应改变。

DD该集成片的转换非线性误差不大于±0.05%。

图10-1(a)所示为AD7524的内部结构和引出端子。

片内含有能够寄存数据的8D锁存器、8个模拟电子开关、8位倒T形电阻网络和运算放大器的反馈电阻F R,且使F R R。

图10-19(b)虚线框内所示的电路是一个CMOS模拟电子开关(S i),当输入D i为1时,NMOS管VT1导通,VT2截止,使2R支路的电流流向OUT1端;D i为0时,VT1截止,VT2导通,2R支路的电流流向OUT2端。

图10-1集成DAC AD7524该片的主要引出端有:DDV(基准电源端);F R(反馈电阻端);V(供电电源正端);GND(地端);REFD7~D0(数据输入端);OUT1、OUT2(R-2R电阻网络的电流输出端);CS(片选端);WR(写输入控制端)。

当CS=WR=0时,输入数据D7~D0可以存入8D锁存器;CS和WR不同时为0时,不能写入数据,锁存器保持原存数据不变。

2R支路的电流经模拟电子开关流向电流输出端OUT1、OUT2。

OUT1通常外接运算放大器的反相输入端,OUT2接运放的同相输入端再接地。

该芯片的应用很广泛,除了用作数模转换(包括微机的数模转换接口)的典型应用外,还可用它构成数控电压或电流源、数字衰减器、数控增益放大器、频率合成器、可编程有源滤波器、数控频率波形发生器等。

例如,用做数模转换。

选用AD7524和运算放大器μA741接成图10-2所示的电路,图中电位器R P1、R P2、R P3用于电路校准。

使CS和WR同时为0,即可从D7~D0端输入数据。

有缘学习交流+V星ygd3076或关注桃报:奉献教育(店铺)图10-2用AD7524构成DAC当输入最小数字量00000000时,输出的电压模拟量应为0,若不为0,可调节调零电位器R P3,使输出为0,这一调节过程称为零点校准。

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