ADS1250

更新时间： 2024-11-12 22:47:39

品牌	Logo	应用领域
BB		转换器
页数	文件大小	规格书
20页	197K
描述
20-Bit Data Acquisition System ANALOG-TO-DIGITAL CONVERTER

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ADS1250 数据手册

ADS1250

For most current data sheet and other product

information, visit www.burr-brown.com

20-Bit Data Acquisition System

ANALOG-TO-DIGITAL CONVERTER

DESCRIPTION

FEATURES

The ADS1250 is a precision, wide dynamic range,

delta-sigma, analog-to-digital converter with 20-bit

resolution operating from a single +5V supply. The

delta-sigma architecture is used for wide dynamic

range and to guarantee 20 bits of no missing code

performance. An effective resolution of 18 bits (2.8ppm

of rms noise) is achieved for conversion rates up to

25kHz. The dynamic range of the converter is further

increased by providing a low-noise Programmable

Gain Amplifier (PGA) with gain stages of 1, 2, 4, or

8 for low level input signals.

● 20 BITS NO MISSING CODES

● 18 BITS EFFECTIVE RESOLUTION UP TO

25kHz DATA RATE

● LOW NOISE: 2.8ppm at PGA = 1

● DIFFERENTIAL INPUTS

● INL: 0.002% (MAX)

● PROGRAMMABLE FULL SCALE

● I/O CONTROLLED PGA: 1, 2, 4, 8

● EXTERNAL REFERENCE

The ADS1250 is designed for high-resolution mea-

surement applications in cardiac diagnostics, smart

transmitters, industrial process control, weigh scales,

chromatography and portable instrumentation. The

converter includes a flexible synchronous serial inter-

face and offers a three-wire control mode for low-cost

isolation.

APPLICATIONS

● CARDIAC DIAGNOSTICS

● DIRECT THERMOCOUPLE INTERFACE

● BLOOD ANALYSIS

The ADS1250 is a single-channel converter and is

offered in an SOL-16 package.

● INFRARED PYROMETER

● LIQUID/GAS CHROMATOGRAPHY

● PRECISION PROCESS CONTROL

V_REF

CLK

SCLK

+V_IN

4th-Order

∆Σ

Modulator

Digital

Filter

Serial

Output

DRDY

PGA

–V_IN

–

DOUT

+V_S

AGND

DSYNC

Control

+V_D

DGND

ADS1250

International Airport Industrial Park

•

Mailing Address: PO Box 11400, Tucson, AZ 85734

•

Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706

• Tel: (520) 746-1111

Twx: 910-952-1111

•

Internet: http://www.burr-brown.com/

•

Cable: BBRCORP Telex: 066-6491

•

FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132

•

PDS-1520B

Printed in U.S.A. December, 1999

12 3 4 5 6 7...20

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