REV. C
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reliable. However, no responsibility is assumed by Analog Devices for its
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which may result from its use. No license is granted by implication or
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a
AD976/AD976A
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 1999
16-Bit, 100 kSPS/200 kSPS
BiCMOS A/D Converters
FUNCTIONAL BLOCK DIAGRAM
REF
V
ANA
4kV
R
D15
D0
DGND
BYTE
R/C
CS BUSY
V
DIG
V
IN
AGND2
CAP
AGND1
2.5V
REFERENCE
4R
CONTROL LOGIC &
INTERNAL CALIBRATION CIRCUITRY
CLOCK
PARALLEL
INTERFACE
SWITCHED
CAP ADC
AD976/AD976A
4R
3
R = 6kV AD976
R = 3kV AD976A
FEATURES
Fast 16-Bit ADC
200 kSPS Throughput – AD976A
100 kSPS Throughput – AD976
Single 5 V Supply Operation
Input Range: ⴞ10 V
100 mW Max Power Dissipation
Choice of External or Internal 2.5 V Reference
High Speed Parallel Interface
On-Chip Clock
28-Lead Skinny DIP, SSOP or SOIC Packages
GENERAL DESCRIPTION
The AD976/AD976A is a high speed, low power 16-bit A/D
converter that operates from a single 5 V supply. The part con-
tains a successive approximation, switched capacitor ADC, an
internal 2.5 V reference and a high speed parallel interface. The
ADC is factory calibrated to minimize all linearity errors. The
analog full-scale input is the standard industrial range of ±10 V.
The AD976/AD976A is comprehensively tested for ac param-
eters such as SNR and THD, as well as the more traditional
parameters of offset, gain and linearity.
The AD976/AD976A is fabricated on Analog Devices’ propri-
etary BiCMOS process, which has high performance bipolar
devices along with CMOS transistors.
The AD976/AD976A is available in skinny 28-lead DIP, SSOP
and SOIC packages.
PRODUCT HIGHLIGHTS
1. Fast Throughput.
The AD976/AD976A is a high speed (100 kSPS/200 kSPS
throughput rates respectively), 16-bit ADC based on a
switched capacitor architecture.
2. Single-Supply Operation.
The AD976/AD976A operates from a single 5 V supply and
dissipates only 100 mW max.
3. Comprehensive DC and AC Specifications.
The AD976/AD976A is factory calibrated and fully tested for
SNR and THD as well as the traditional specifications of
offset, gain and linearity.
4. Complete A/D Solution.
The AD976/AD976A offers a highly integrated solution
containing an accurate ADC, reference and on-chip clock.