16-Bit, 8-Channel Serial Output Sampling

ANALOG-TO-DIGITAL CONVERTER

FEATURES

q BIPOLAR INPUT RANGE

q PIN-FOR-PIN COMPATIBLE WITH THE

ADS7844 AND ADS8344

q SINGLE SUPPLY: 2.7V to 5V

q 8-CHANNEL SINGLE-ENDED OR

4-CHANNEL DIFFERENTIAL INPUT

q UP TO 100kHz CONVERSION RATE

q 85dB SINAD

q SERIAL INTERFACE

q QSOP-20 AND SSOP-20 PACKAGES

DESCRIPTION

The ADS8345 is an 8-channel, 16-bit, sampling

Analog-to-Digital (A/D) converter with a synchronous serial

interface. Typical power dissipation is 8mW at a 100kHz

throughput rate and a +5V supply. The reference voltage

corresponding input voltage range of

±V

includes a shutdown mode which reduces power dissipation

to under 15

µW. The ADS8345 is ensured down to 2.7V

operation.

Low-power, high-speed, and an onboard multiplexer make

the ADS8345 ideal for battery-operated systems such as

personal digital assistants, portable multi-channel data log-

gers, and measurement equipment. The serial interface also

provides low-cost isolation for remote data acquisition. The

ADS8345 is available in a QSOP-20 or SSOP-20 package

and is ensured over the –40

°C to +85°C temperature range.

CDAC

SAR

Comparator

8-Channel

Multiplexer

Serial

Interface

and

Control

CH4

CH5

CH6

CH7

COM

V

REF

CS

SHDN

D

IN

D

OUT

BUSY

DCLK

CH0

CH1

CH2

CH3

®

ADS8

345

®

ADS8345

ADS8345

SBAS177C – FEBRUARY 2001 – REVISED APRIL 2003

www.ti.com

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.

Copyright © 2001-2003, 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.

APPLICATIONS

q DATA ACQUISITION

q TEST AND MEASUREMENT EQUIPMENT

q INDUSTRIAL PROCESS CONTROL

q PERSONAL DIGITAL ASSISTANTS

q BATTERY-POWERED SYSTEMS