ADC700 Datasheet, PDF (1/12 Pages) Burr-Brown (TI) – 16-Bit Resolution With Microprocessor Interface A/D CONVERTER

®
ADC700
16-Bit Resolution With Microprocessor Interface
A/D CONVERTER
FEATURES
q COMPLETE WITH REFERENCE, CLOCK,
8-BIT PORT MICROPROCESSOR
INTERFACE
q CONVERSION TIME: 17µs max
q LINEARITY ERROR: ±0.003% FSR max
q NO MISSING CODES TO 14 BITS OVER
TEMPERATURE
q SPECIFIED AT ±12V AND ±15V SUPPLIES
q OUTPUT BUFFER LATCH FOR IMPROVED
INTERFACE TIMING FLEXIBILITY
q PARALLEL AND SERIAL DATA OUTPUT
q SMALL PACKAGE: 28-Pin DIP
DESCRIPTION
The ADC700 is a complete 16-bit resolution succes-
sive approximation analog-to-digital converter.
The reference circuit, containing a buried zener, is
laser-trimmed for minimum temperature coefficient.
The clock oscillator is current-controlled for excellent
stability over temperature. Gain and Zero errors may
be externally trimmed to zero. Analog input ranges of
0V to +5V, 0V to +10V, 0V to +20V, ±2.5V, ±5V, and
±10V are available.
The conversion time is 17µs max for a 16-bit conver-
sion over the three specification temperature ranges.
After a conversion, output data is stored in a latch
separate from the successive approximation logic. This
permits reading data during the next conversion, a
feature that provides flexible interface timing, espe-
cially for interrupt-driven interfaces.
Data is available in two 8-bit bytes from TTL-compat-
ible three-state output drivers. Output data is coded in
Straight Binary for unipolar input signals and Bipolar
Offset Binary or Twos complement for bipolar input
signals. BOB or BTC is selected by a logic function
available on one of the pins.
The ADC700 is available in commercial, industrial
and military temperature ranges. It is packaged in a
hermetic 28-pin side-braze ceramic DIP.
Data
Serial Data
Ready Status Strobe
Serial Data
CS
RD
WR
HBEN
BTCEN
Reset
10V
Analog
Inputs
20V
SJ
Clock
and
Control Logic
Bipolar
Offset
Comparator
Successive
Approximation
Register
3-
Data ^State
16 _Latch
3-
State
16-Bit
D/A
16
Converter
Voltage
Reference
8
Parallel
Data
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© 1989 Burr-Brown Corporation
PDS-856A
Printed in U.S.A. October, 1993