AD7703CR

更新时间： 2024-11-22 22:39:03

品牌	Logo	应用领域
亚德诺 - ADI		转换器模数转换器光电二极管
页数	文件大小	规格书
16页	253K
描述
LC2MOS 20-Bit A/D Converter

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中文翻译

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数据手册
替代型号

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AD7703CR 数据手册

LC MOS

20-Bit A/D Converter

AD7703

FEATURES

FUNCTIO NAL BLO CK D IAGRAM

Monolithic 20-Bit ADC

0.0003% Linearity Error

AV_SS

DV_SS

SC1

SC2

20-Bit No Missed Codes

On-Chip Self-Calibration Circuitry

Program m able Low -Pass Filter

0.1 Hz to 10 Hz Corner Frequency

0 to +2.5 V or +2.5 V Analog Input Range

4 kSPS Output Data Rate

Flexible Serial Interface

Ultralow Pow er

AD7703

DV_DD

AV_DD

CALIBRATION

MICROCONTROLLER

CALIBRATION

SRAM

CAL

20-BIT CHARGE BALANCE A/D

CONVERTER

A_IN

BP/UP

SLEEP

6-POLE GAUSSIAN

ANALOG

MODULATOR

V_REF

LOW-PASS

DIGITAL FILTER

APPLICATIONS

Industrial Process Control

Weigh Scales

Portable Instrum entation

Rem ote Data Acquisition

AGND

DGND

20 SDATA

CLOCK

SERIAL INTERFACE

GENERATOR

LOGIC

SCLK

MODE

CLKIN CLKOUT

DRDY

GENERAL D ESCRIP TIO N

P RO D UCT H IGH LIGH TS

T he AD7703 is a 20-bit ADC which uses a sigma delta conver-

sion technique. T he analog input is continuously sampled by an

analog modulator whose mean output duty cycle is proportional

to the input signal. T he modulator output is processed by an

on-chip digital filter with a six-pole Gaussian response, which

updates the output data register with 20-bit binary words at

word rates up to 4 kHz. T he sampling rate, filter corner fre-

quency and output word rate are set by a master clock input

that may be supplied externally, or by an on-chip gate oscillator.

1. T he AD7703 offers 20-bit resolution coupled with

outstanding 0.0003% accuracy.

2. No missing codes ensures true, usable, 20-bit dynamic range,

removing the need for programmable gain and level-setting

circuitry.

3. T he effects of temperature drift are eliminated by on-chip

self-calibration, which removes zero and gain error. External

circuits can also be included in the calibration loop to remove

system offsets and gain errors.

T he inherent linearity of the ADC is excellent, and endpoint

accuracy is ensured by self-calibration of zero and full scale

which may be initiated at any time. T he self-calibration scheme

can also be extended to null system offset and gain errors in the

input channel.

4. A flexible synchronization allows the AD7703 to interface

directly to the serial ports of industry standard

microcontrollers and DSP processors.

5. Low operating power consumption and an ultralow power

standby mode make the AD7703 ideal for loop powered

remote sensing applications, or battery-powered portable

instruments.

T he output data is accessed through a serial port, which has two

synchronous modes suitable for interfacing to shift registers or

the serial ports of industry standard microcontrollers.

CMOS construction ensures low power dissipation, and a power

down mode reduces the idle power consumption to only 10 ␮W.

REV. D

Inform ation furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assum ed by Analog Devices for its

use, nor for any infringem ents of patents or other rights of third parties

which m ay result from its use. No license is granted by im plication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.

Tel: 617/ 329-4700

Fax: 617/ 326-8703

12 3 4 5 6 7...16

中文翻译

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AD7703CR 替代型号

型号	品牌	替代类型	描述	数据表
AD7703BRZ	ADI	完全替代	20-Bit A/D Converter

与AD7703CR相关器件

型号	品牌	获取价格	描述	数据表
AD7703CR-REEL	ADI	获取价格	1-CH 20-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO20, SOIC-20
AD7703SQ	ADI	获取价格	LC2MOS 20-Bit A/D Converter
AD7703SQ/883B	ADI	获取价格	IC 1-CH 20-BIT DELTA-SIGMA ADC, SERIAL ACCESS, CDIP20, CERDIP-20, Analog to Digital Conver
AD7705	ADI	获取价格	3 V/5 V, 1 mW 2-/3-Channel 16-Bit, Sigma-Delta ADCs
AD7705_06	ADI	获取价格	3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs
AD7705_15	ADI	获取价格	3 V/5 V, 1 mW, 2-/3-Channel
AD7705BN	ADI	获取价格	3 V/5 V, 1 mW 2-/3-Channel 16-Bit, Sigma-Delta ADCs
AD7705BNZ1	ADI	获取价格	3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs
AD7705BR	ADI	获取价格	3 V/5 V, 1 mW 2-/3-Channel 16-Bit, Sigma-Delta ADCs
AD7705BR	AMD	获取价格	3V/5V，1mW 2-/3-Channel 16-Bit,Sigma-Delta ADC

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