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ADC0816CCJ
8-Bit P Compatible A/D Converters with 16-Channel Multiplexer
ADC0816/ADC0817
8-Bit μP Compatible A/D Converters
with 16-Channel Multiplexer
General DescriptionThe ADC0816, ADC0817 data acquisition componentisa
monolithic CMOS devicewithan 8-bit analog-to-digital con-
verter, 16-channel multiplexer and microprocessor compat-
ible control logic. The 8-bit A/D converter uses successive
approximationasthe conversion technique. The converter
featuresa high impedance chopper stabilized comparator,a
256R voltage divider with analog switchtreeanda succes-
sive approximation register.The 16-channel multiplexercan
directly accessanyoneof 16-single-ended analog signals,
and providesthe logicfor additional channel expansion.Sig-
nal conditioningofany analog input signalis easedby direct
accesstothe multiplexer output,andtothe inputofthe 8-bit
A/D converter.
The device eliminatesthe needfor external zero and
full-scale adjustments. Easy interfacingto microprocessors providedbythe latchedand decoded multiplexer address
inputsand latchedTTL TRI-STATE® outputs.
The designofthe ADC0816, ADC0817has been optimized incorporatingthe most desirable aspectsof severalA/D
conversion techniques. TheADC0816,ADC0817 offers high
speed, high accuracy, minimal temperaturedependence,ex-
cellent long-term accuracyand repeatability,and consumes
minimal power. These features make this device ideally
suitedto applications from processand machine controlto
consumer and automotive applications.For similar perfor-
manceinan 8-channel, 28-pin, 8-bitA/D converter,seethe
ADC0808, ADC0809 data sheet. (See AN-258for morein-
formation.)
Features Easy interfacetoall microprocessors Operates ratiometricallyor with5 VDCor analog span
adjusted voltage reference 16-channel multiplexer with latched control logic Outputs meet TTL voltage level specifications0Vto5V analog input voltage range with single5V
supplyNo zeroor full-scale adjust required Standard hermeticor molded 40-pinDIP package Temperature range −40˚Cto +85˚Cor −55˚Cto +125˚C Latched TRI-STATE output Direct accessto “comparatorin”and “multiplexerout”for
signal conditioning ADC0816 equivalentto MM74C948 ADC0817 equivalentto MM74C948-1
Key Specifications Resolution 8Bits Total Unadjusted Error ±1⁄2 LSBand±1 LSB Single Supply 5 VDC Low Power 15 mW Conversion Time 100μs
Block DiagramTRI-STATE®isa registeredtrademark ofNationalSemiconductorCorporation.
DS005277-1
June 1999
ADC0816/ADC0817
8-Bit
Compatible
A/D
Converters
with
16-Channel
Multiplexer©1999 National Semiconductor Corporation DS005277
