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ADC0831-ADC0832-ADC0834-ADC0838
8-Bit Serial I/O A/D Converter with Multiplexer Option
TL/H/5583
ADC0831/ADC0832/ADC0834
and
ADC0838
8-Bit
Serial
I/O
A/D
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 seriesare 8-bit successive approximation
A/D converters witha serialI/Oand configurable input mul-
tiplexers withupto8 channels. The serialI/Ois configured comply withthe NSC MICROWIRETM serial dataex-
change standardfor easy interfacetothe COPSTM familyof
processors, andcan interface with standard shift registers mPs.
The2-,4-or 8-channel multiplexersare software configured
for single-endedor differential inputsaswellas channelas-
signment.
The differential analog voltage input allows increasingthe
common-mode rejection and offsettingthe analog zeroin-
put voltage value.In addition,the voltage reference input
canbe adjustedto allow encodingany smaller analog volt-
age spantothefull8bitsof resolution.
Features NSC MICROWIRE compatibleÐdirect interfaceto
COPS family processors Easy interfacetoall microprocessors,or operates
‘‘stand-alone’’ Operates ratiometricallyor with5 VDC voltage
referenceNo zeroor full-scale adjust required2-,4-or 8-channel multiplexer options with address
logic Shunt regulator allows operation with high voltage
supplies0Vto5V input range with single5V power supply Remote operation with serial digital datalink TTL/MOS input/output compatible 0.3× standard width,8-,14-or 20-pinDIP package20Pin Molded Chip Carrier Package (ADC0838 only) Surface-Mount Package
Key Specifications Resolution 8Bits Total Unadjusted Error g(/2 LSBandg1 LSB Single Supply 5 VDC Low Power 15 mW Conversion Time 32ms
Typical Application
TL/H/5583–1
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporation.
COPSTMand MICROWIRETM aretrademarksof National Semiconductor Corporation.
C1995National SemiconductorCorporation RRD-B30M115/PrintedinU.S.A.
