®
ADC80MAH-12
Monolithic12-Bit
ANALOG-TO-DIGITAL CONVERTER
FEATURES
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INDUSTRY-STANDARD 12-BIT ADC
MONOLITHIC CONSTRUCTION
LOW COST
±
0.012% LINEARITY
25
µ
s max CONVERSION TIME
circuits have been redesigned to allow simplified free-
running operation with internal or external clock.
Data is available in parallel and serial form with
corresponding clock and status signals. All digital
input and output signals are TTL/LSTTL-compatible,
with internal pull-up resistors included on all digital
inputs to eliminate the need for external pull-up resis-
tors on digital inputs not requiring connection. The
ADC80MAH-12 operates equally well with either
±15V
or
±12V
analog power supplies, and also re-
quires use of a +5V logic power supply. However,
unlike many ADC80-type products, a +5V analog
power supply is not required. It is packaged in a
hermetic 32-pin side-brazed ceramic dual-in-line pack-
age.
±
12V OR
±
15V OPERATION
NO MISSING CODES: –25
°
C to +85
°
C
HERMETIC 32-PIN PACKAGE
PARALLEL OR SERIAL OUTPUTS
705mW max DISSIPATION
DESCRIPTION
The ADC80MAH-12 is a 12-bit single-chip succes-
sive-approximation analog-to-digital converter for low
cost converter applications. It is complete with a
comparator, a 12-bit DAC which includes a 6.3V
reference laser-trimmed for minimum temperature
coefficient, a successive approximation register (SAR),
clock, and all other associated logic functions.
Internal scaling resistors are provided for the selection
of analog input signal ranges of
±2.5V, ±5V, ±10V,
0
to +5V, or 0 to +10V. Gain and offset errors may be
externally trimmed to zero, enabling initial end-point
accuracies of better than
±0.12%
(±1/2LSB).
The maximum conversion time of 25µs makes the
ADC80MAH-12 ideal for a wide range of 12-bit
applications requiring system throughput sampling
rates up to 40kHz. In addition, this A/D converter may
be short-cycled for faster conversion speed with re-
duced resolution, and an external clock may be used to
synchronize the converter to the system clock or to
obtain higher-speed operation. The convert command
International Airport Industrial Park • Mailing Address: PO Box 11400
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP •
©
Clock
Inhibit
External
Clock
Short
Cycle
Comparator
In
20V Range
10V Range
Comparator
Clock
Clock
Out
Parallel
Data
Output
Serial
Out
Successive
Approximation
Register
12-Bit D/A
Converter
Bipolar
Offset
Reference Out
• Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
1986 Burr-Brown Corporation
PDS-694A
Printed in U.S.A. October, 1993
BURR-BROWN [ BURR-BROWN CORPORATION ]
