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FEATURES

DESCRIPTION

APPLICATIONS

_

+

SAR

Output

Latches

and

3-State

Drivers

BYTE

12/8-Bit Parallel

Data Output Bus

Conversion

and

Control Logic

CONVST

BUSY

CS

RD

A_PWD

PWD/RST

CDAC

Comparator

CLOCK

2.5 V

Internal

Reference

+IN

−IN

REFIN

REFOUT

ADS7882

12-BIT, 3-MSPS

LOW POWER SAR ANALOG-TO-DIGITAL CONVERTER

• 3-MHz Sample Rate, 12-Bit Resolution

• Zero Latency

The ADS7882 is a 12-bit 3-MSPS A-to-D converter

with 2.5-V internal reference. The device includes a

• Unipolar, Pseudo Differential Input, Range:

capacitor based SAR A/D converter with inherent

–

0 V to 2.5 V

sample and hold. The device offers a 12-bit parallel

• High-Speed Parallel Interface

interface with an additional byte mode that provides

easy interface with 8-bit processors. The device has

• 69.5 dB SNR at 100 kHz I/P

a pseudo-differential input stage.

• Power Dissipation 85 mW at 3 MSPS

The –IN swing of ±200 mV is useful to compensate

• Nap Mode (10 mW Power Dissipation)

for ground voltage mismatch between the ADC and

• Power Down (10 µW)

sensor and also to cancel common-mode noise. With

• Internal Reference

nap mode enabled, the device operates at lower

power when used at lower conversion rates. The

• Internal Reference Buffer

device is available in 48-pin TQFP package.

• 48-Pin TQFP Package

• Optical Networking (DWDM, MEMS Based

Switching)

• Spectrum Analyzers

• High Speed Data Acquisition Systems

• High Speed Close-Loop Systems

• Telecommunication

• Ultra-Sound Detection

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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.

Copyright © 2008, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.