Rainbow Electronics ADC0838 - Manual

TL H 5583
ADC0831ADC0832ADC0834
and
ADC0838
8-Bit
Serial
IO
AD
Converters
with
Multiplexer
Options
January 1995
ADC0831 ADC0832 ADC0834 and ADC0838
8-Bit Serial I O A D Converters with Multiplexer Options
General Description
The ADC0831 series are 8-bit successive approximation
A D converters with a serial I O and configurable input mul-
tiplexers with up to 8 channels The serial I O is configured
to comply with the NSC MICROWIRE
TM serial data ex-
change standard for easy interface to the COPS TM family of
processors and can interface with standard shift registers
or mPs
The 2- 4- or 8-channel multiplexers are software configured
for single-ended or differential inputs as well as channel as-
signment
The differential analog voltage input allows increasing the
common-mode rejection and offsetting the analog zero in-
put voltage value In addition the voltage reference input
can be adjusted to allow encoding any smaller analog volt-
age span to the full 8 bits of resolution
Features
Y NSC MICROWIRE compatible direct interface to
COPS family processors
Y Easy interface to all microprocessors or operates
‘‘stand-alone’’
Y Operates ratiometrically or with 5 V
DC
voltage
reference
Y No zero or full-scale adjust required
Y 2- 4- or 8-channel multiplexer options with address
logic
Y Shunt regulator allows operation with high voltage
supplies
Y 0V to 5V input range with single 5V power supply
Y Remote operation with serial digital data link
Y TTL MOS input output compatible
Y 0 3 standard width 8- 14- or 20-pin DIP package
Y 20 Pin Molded Chip Carrier Package (ADC0838 only)
Y Surface-Mount Package
Key Specifications
Y Resolution 8 Bits
Y Total Unadjusted Error g LSB and g 1 LSB
Y Single Supply 5 V DC
Y Low Power 15 mW
Y Conversion Time 32 ms
Typical Application
TL H 5583 – 1
TRI-STATE is a registered trademark of National Semiconductor Corporation
COPS TM and MICROWIRE TM are trademarks of National Semiconductor Corporation
C1995 National Semiconductor Corporation RRD-B30M115 Printed in U S A