Datasheet > AD7703SQ/883B

AD7703SQ/883B

更新时间： 2024-09-16 19:49:19

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
16页	413K
描述
IC 1-CH 20-BIT DELTA-SIGMA ADC, SERIAL ACCESS, CDIP20, CERDIP-20, Analog to Digital Converter

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AD7703SQ/883B 数据手册

LC²MOS

20-Bit A/D Converter

AD7703

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Monolithic 16-Bit ADC

0.0015% Linearity Error

SC1

SC2

On-Chip Self-Calibration Circuitry

Programmable Low-Pass Filter

0.1 Hz to 10 Hz Corner Frequency

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

4 kSPS Output Data Rate

Flexible Serial Interface

AD7703

CALIBRATION

MICROCONTROLLER

CALIBRATION

SRAM

CAL

Ultralow Power

20-BIT CHARGE BALANCE A/D

CONVERTER

12 BP/UP

11 SLEEP

APPLICATIONS

Industrial Process Control

Weigh Scales

Portable Instrumentation

Remote Data Acquisition

6-POLE GAUSSIAN

ANALOG

REF

AGND

DGND

LOW-PASS

DIGITAL FILTER

MODULATOR

SDATA

SCLK

CLOCK

SERIAL INTERFACE

GENERATOR

LOGIC

MODE

CLKIN CLKOUT

DRDY

GENERAL DESCRIPTION

PRODUCT HIGHLIGHTS

The AD7703 is a 20-bit ADC that uses a S-D conversion tech-

nique. The analog input is continuously sampled by an analog

modulator whose mean output duty cycle is proportional to the

input signal. The modulator output is processed by an on-chip

digital filter with a six-pole Gaussian response, which updates the

output data register with 16-bit binary words at word rates up to

4 kHz. The sampling rate, filter corner frequency, and output

word rate are set by a master clock input that may be supplied

externally, or by a crystal controlled on-chip clock oscillator.

1. The 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. The 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.

The inherent linearity of the ADC is excellent and endpoint accu-

racy is ensured by self-calibration of zero and full scale, which

may be initiated at any time. The self-calibration scheme can

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

channel.

4. Flexible synchronous/asynchronous interface 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.

The output data is accessed through a flexible serial port, which

has an asynchronous mode compatible with UARTs and 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 µW.

REV. E

Information furnished by Analog Devices is believed to be accurate and

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

use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective companies.

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

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

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与AD7703SQ/883B相关器件

型号	品牌	获取价格	描述	数据表
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
AD7705BR	ROCHESTER	获取价格	2-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, 0.300 INCH, MS-013AA, SOIC-16
AD7705BR-REEL	ADI	获取价格	3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs
AD7705BR-REEL7	ADI	获取价格	3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs

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