Texas Instruments ADS7841 Handleiding

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12-Bit, 4-Channel Serial Output Sampling

ANALOG-TO-DIGITAL CONVERTER

FEATURES

●SINGLE SUPPLY: 2.7V to 5V

●4-CHANNEL SINGLE-ENDED OR

2-CHANNEL DIFFERENTIAL INPUT

●UP TO 200kHz CONVERSION RATE

●±1LSB MAX INL AND DNL

●NO MISSING CODES

●72dB SINAD

●SERIAL INTERFACE

●DIP-16 OR SSOP-16 PACKAGE

●ALTERNATE SOURCE FOR MAX1247

●ADS7841ES: +125°C Version

DESCRIPTION

The ADS7841 is a 4-channel, 12-bit sampling Analog-to-

Digital Converter (ADC) with a synchronous serial inter-

face. The resolution is programmable to either 8 bits or 12

bits. Typical power dissipation is 2mW at a 200kHz through-

put rate and a +5V supply. The reference voltage (V

REF

) can

be varied between 100mV and V

CC

, providing a correspond-

ing input voltage range of 0V to V

REF

. The device includes

a shutdown mode which reduces power dissipation to under

15µW. The ADS7841 is tested down to 2.7V operation.

Low power, high speed, and on-board multiplexer make the

ADS7841 ideal for battery-operated systems such as per-

sonal digital assistants, portable multi-channel data loggers,

and measurement equipment. The serial interface also pro-

vides low-cost isolation for remote data acquisition. The

ADS7841 is available in a DIP-16 or a SSOP-16 package

and is specified over the –40°C to +125°C

(1)

temperature

range.

NOTE: (1) ES grade only.

CDAC

SAR

Comparator

Four

Channel

Multiplexer

Serial

Interface

and

Control

CH0

CH1

CH2

CH3

COM

V

REF

CS

SHDN

DIN

DOUT

MODE

BUSY

DCLK

ADS7841

ADS7841

APPLICATIONS

●DATA ACQUISITION

●TEST AND MEASUREMENT

●INDUSTRIAL PROCESS CONTROL

●PERSONAL DIGITAL ASSISTANTS

●BATTERY-POWERED SYSTEMS

ADS7841

SBAS084B – JULY 2001

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Copyright © 2000, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Product specificaties