ADS821
ADS
821
U
SBAS040B – DECEMBER 1995 – REVISED FEBRUARY 2005
10-Bit, 40MHz Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
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NO MISSING CODES
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INTERNAL REFERENCE
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LOW POWER: 380mW
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HIGH SNR: 58dB
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INTERNAL TRACK-AND-HOLD
DESCRIPTION
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.
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.
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.
APPLICATIONS
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VIDEO DIGITIZING
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ULTRASOUND IMAGING
GAMMA CAMERAS
SET-TOP BOXES
CABLE MODEMS
CCD IMAGING
Color Copiers
Scanners
Camcorders
Security Cameras
Fax Machines
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IF AND BASEBAND DIGITIZATION
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TEST INSTRUMENTATION
CLK
MSBI
OE
Timing
Circuitry
IN
T&H
IN
+3.25V
REFT
Pipeline
A/D
Converter
Error
Correction
Logic
3-State
Outputs
10-Bit
Digital
Data
CM
REFB
+1.25V
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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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