ADS8381

SLAS364D − APRIL 2002 − REVISED FEBRUARY 2005

18BIT, 580kHz, UNIPOLAR INPUT, MICRO POWER SAMPLING

ANALOGTODIGITAL CONVERTER WITH PARALLEL INTERFACE

FEATURES

Clock

APPLICATIONS

DESCRIPTION

The ADS8381 is an 18-bit, 580 kHz A/D converter. The

device includes a 18-bit capacitor-based SAR A/D

converter with inherent sample and hold. The ADS8381

offers a full 18-bit interface, a 16-bit option where data is

read using two read cycles, or an 8-bit bus option using

three read cycles.

The ADS8381 is available in a 48-lead TQFP package and

is characterized over the industrial −40

°C to 85°C

temperature range.

CDAC

_

+

Output

Latches

and

3-State

Drivers

BUS 18/16

BYTE

18-/16-/8-Bit

Parallel DATA

Output Bus

SAR

Conversion

and

Control Logic

Comparator

Clock

+IN

−IN

REFIN

CONVST

BUSY

CS

RD

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.

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.

Copyright

 2002−2005, Texas Instruments Incorporated