ADS821
A
D
S
8
2
1
U
SBAS040B – DECEMBER 1995 – REVISED FEBRUARY 2005
10-Bit, 40MHz Sampling
ANALOG-TO-DIGITAL CONVERTER
DESCRIPTION
FEATURES
● NO MISSING CODES
● INTERNAL REFERENCE
● LOW POWER: 380mW
● HIGH SNR: 58dB
The ADS821 is a low-power, monolithic 10-bit, 40MHz Ana-
log-to-Digital (A/D) converter utilizing a small geometry CMOS
process. This complete converter includes a 10-bit quantizer
with internal track-and-hold, reference, and a power-down
feature. It operates from a single +5V power supply and can
be configured to accept either differential or single-ended
input signals.
● INTERNAL TRACK-AND-HOLD
The ADS821 employs digital error correction to provide
excellent Nyquist differential linearity performance for de-
manding imaging applications. Its low distortion, high SNR,
and high oversampling capability give it the extra margin
needed for telecommunications and video applications.
APPLICATIONS
● VIDEO DIGITIZING
● ULTRASOUND IMAGING
● GAMMA CAMERAS
● SET-TOP BOXES
This high-performance converter is specified for AC and DC-
performance at a 40MHz sampling rate. The ADS821 is
available in an SO-28 package.
● CABLE MODEMS
● CCD IMAGING
Color Copiers
Scanners
Camcorders
CLK
MSBI
OE
Security Cameras
Fax Machines
● IF AND BASEBAND DIGITIZATION
● TEST INSTRUMENTATION
Timing
Circuitry
IN
IN
Pipeline
A/D
Converter
10-Bit
Digital
Data
Error
Correction
Logic
3-State
Outputs
T&H
+3.25V
REFT
CM
REFB
+1.25V
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1995-2005, Texas Instruments Incorporated
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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