AD974

更新时间： 2024-09-24 22:50:03

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
20页	205K
描述
4-Channel, 16-Bit, 200 kSPS Data Acquisition System

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中文翻译

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数据手册

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AD974 数据手册

4-Channel, 16-Bit, 200 kSPS

Data Acquisition System

AD974

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Fast 16-Bit ADC with 200 kSPS Throughput

Four Single-Ended Analog Input Channels

Single +5 V Supply Operation

Input Ranges: 0 V to +4 V, 0 V to +5 V and ؎10 V

120 mW Max Power Dissipation

Power-Down Mode 50 ␮W

Choice of External or Internal 2.5 V Reference

On-Chip Clock

Power-Down Mode

REF

PWRD

CAP

DIG

ANA

BIP

REF

BUFF

2.5V

REFERENCE

V1A

V1B

RESISTIVE

NETWORK

AD974

EXT/INT

DATACLK

DATA

V2A

V2B

RESISTIVE

NETWORK

SWITCHED

CAP ADC

4 TO 1

MUX

SERIAL

INTERFACE

R/C

V3A

V3B

RESISTIVE

NETWORK

LATCH

CLOCK

SYNC

V4A

V4B

RESISTIVE

NETWORK

CONTROL LOGIC

CALIBRATION CIRCUITRY

GENERAL DESCRIPTION

The AD974 is a four-channel, data acquisition system with a

serial interface. The part contains an input multiplexer, a high-

speed 16-bit sampling ADC and a +2.5 V reference. All of this

operates from a single +5 V power supply that also has a power-

down mode. The part will accommodate 0 V to +4 V, 0 V to

+5 V or ±10 V analog input ranges.

A0 A1

BUSY

AGND1 AGND2

WR1

WR2

DGND

PRODUCT HIGHLIGHTS

1. The AD974 is a complete data acquisition system combining

a four-channel multiplexer, a 16-bit sampling ADC and a

+2.5 V reference on a single chip.

The interface is designed for an efficient transfer of data while

requiring a low number of interconnects.

The AD974 is comprehensively tested for ac parameters such as

SNR and THD, as well as the more traditional parameters of

offset, gain and linearity.

2. The part operates from a single +5 V supply and also has a

power-down feature.

3. Interfacing to the AD974 is simple with a low number of

interconnect signals.

The AD974 is fabricated on Analog Devices’ BiCMOS process,

which has high performance bipolar devices along with CMOS

transistors.

4. The AD974 is comprehensively specified for ac parameters

such as SNR and THD, as well as dc parameters such as

linearity and offset and gain errors.

The AD974 is available in 28-lead DIP, SOIC and SSOP

packages.

REV. A

Information 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

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

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

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