ADS831| Datasheet

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ADS831
AD S83 1

SBAS087A MAY 2001

8-Bit, 80MHz Sampling ANALOG-TO-DIGITAL CONVERTER
TM

FEATURES
q HIGH SNR: 49dB q INTERNAL OR EXTERNAL REFERENCE OPTION q SINGLE-ENDED OR DIFFERENTIAL ANALOG INPUT q PROGRAMMABLE INPUT RANGE: 1Vp-p /2Vp-p q LOW POWER: 275mW q LOW DNL: 0.35LSB q SINGLE +5V SUPPLY OPERATION q SSOP-20 PACKAGE

DESCRIPTION
The ADS831 is a pipeline, CMOS Analog-to-Digital (A/D) converter that operates from a single +5V power supply. This converter provides excellent performance with a single-ended input and can be operated with a differential input for added spurious performance. This high performance converter includes an 8-bit quantizer, high bandwidth track/hold, and a high accuracy internal reference. It also allows for the user to disable the internal reference and utilize external references. This external reference option provides excellent gain and offset matching when used in multi-channel applications or in applications where DC full scale range adjustment is required. The ADS831 employs digital error correction techniques to provide excellent differential linearity for demanding imaging applications. Its low distortion and high SNR give the extra margin needed for medical imaging, communications, video, and test instrumentation. The ADS831 is specified at a maximum sampling frequency of 80MHz and a single-ended input
range of 1.5V to 3.5V. The ADS831 is available in an SSOP-20 package and is pin-for-pin compatible with the 8-bit, 60MHz ADS830.

APPLICATIONS
q q q q q MEDICAL IMAGING VIDEO DIGITIZING COMPUTER SCANNERS COMMUNICATIONS DISK-DRIVE CONTROL
+VS ADS831

CLK

VDRV

Timing Circuitry

VIN

IN T/H IN (Opt)

8-Bit Pipelined A/D Core

Error Correction Logic

3-State Outputs

D0 D7

Internal Reference

Optional External Reference

Int/Ext

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.

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