ADC0831/ADC0832/ADC0834/ADC0838 8-Bit Serial I/O A/D Converters with Multiplexer Options
July 2002
ADC0831/ADC0832/ADC0834/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 multiplex-
ers with up to 8 channels. The serial I/O is configured to
comply with the NSC MICROWIRE
™
serial data exchange
standard for easy interface to the COPS
™
family of proces-
sors, and can interface with standard shift registers or µPs.
The 2-, 4- or 8-channel multiplexers are software configured
for single-ended or differential inputs as well as channel
assignment.
The differential analog voltage input allows increasing the
common-mode rejection and offsetting the analog zero input
voltage value. In addition, the voltage reference input can be
adjusted to allow encoding any smaller analog voltage span
to the full 8 bits of resolution.
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Operates ratiometrically or with 5 V
DC
voltage reference
No zero or full-scale adjust required
2-, 4- or 8-channel multiplexer options with address logic
Shunt regulator allows operation with high voltage
supplies
0V to 5V input range with single 5V power supply
Remote operation with serial digital data link
TTL/MOS input/output compatible
0.3" standard width, 8-, 14- or 20-pin DIP package
20 Pin Molded Chip Carrier Package (ADC0838 only)
Surface-Mount Package
Key Specifications
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Resolution
Total Unadjusted Error
Single Supply
Low Power
Conversion Time
8 Bits
±
⁄ LSB and
±
1 LSB
5 V
DC
15 mW
32 µs
12
Features
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NSC MICROWIRE compatible — direct interface to
COPS family processors
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Easy interface to all microprocessors, or operates
“stand-alone”
Typical Application
00558301
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
COPS
™
and MICROWIRE
™
are trademarks of National Semiconductor Corporation.
© 2002 National Semiconductor Corporation
DS005583
www.national.com