ADS831
AD
S83
1
¤
SBAS087A – MAY 2001
8-Bit, 80MHz Sampling
ANALOG-TO-DIGITAL CONVERTER
TM
FEATURES
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HIGH SNR: 49dB
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INTERNAL OR EXTERNAL REFERENCE
OPTION
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SINGLE-ENDED OR
DIFFERENTIAL ANALOG INPUT
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PROGRAMMABLE INPUT RANGE:
1Vp-p /2Vp-p
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LOW POWER: 275mW
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LOW DNL: 0.35LSB
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SINGLE +5V SUPPLY OPERATION
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SSOP-20 PACKAGE
DESCRIPTION
The ADS831 is a pipeline, CMOS Analog-to-Digital (A/D) con-
verter that operates from a single +5V power supply. This con-
verter 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 pro-
vide excellent differential linearity for demanding imaging appli-
cations. 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
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MEDICAL IMAGING
VIDEO DIGITIZING
COMPUTER SCANNERS
COMMUNICATIONS
DISK-DRIVE CONTROL
+V
S
ADS831
CLK
VDRV
Timing
Circuitry
V
IN
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.
Copyright © 1998, Texas Instruments Incorporated
www.ti.com
TI [ TEXAS INSTRUMENTS ]
