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ADC0816CCN-ADC0817CCN
8-Bit Microprocessor Compatible A/D Converter 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 device withan 8-bit analog-to-digital con-
verter, 16-channel multiplexer and microprocessor compat-
ible control logic. The 8-bit A/D converter uses successive
approximationas the conversion technique. The converter
featuresa high impedance chopper stabilized comparator,a
256R voltage divider with analog switch tree anda succes-
sive approximation register. The 16-channel multiplexer can
directly access any oneof 16-single-ended analog signals,
and provides the logic for additional channel expansion.
Signal conditioningof any analog input signalis easedby
direct accesstothe multiplexer output, andtothe inputofthe
8-bit A/D converter.
The device eliminates the need for external zero and
full-scale adjustments. Easy interfacingto microprocessors providedbythe latched and decoded multiplexer address
inputs and latched TTL TRI-STATE® outputs.
The designofthe ADC0816, ADC0817 has been optimized incorporating the most desirable aspectsof several A/D
conversion techniques. The ADC0816, ADC0817 offers high
speed, high accuracy, minimal temperature dependence,
excellent long-term accuracy and repeatability, and con-
sumes minimal power. These features make this device
ideally suitedto applications from process and machine
controlto consumer and automotive applications. For similar
performanceinan 8-channel, 28-pin, 8-bit A/D converter,
see the ADC0808, ADC0809 data sheet. (See AN-258for
more information.)
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
supply No zeroor full-scale adjust required Standard hermeticor molded 40-pin DIP package Temperature range −40˚Cto +85˚Cor −55˚Cto +125˚C Latched TRI-STATE output Direct accessto “comparatorin” and “multiplexer out”for
signal conditioning ADC0816 equivalentto MM74C948 ADC0817 equivalentto MM74C948-1
Key Specifications Resolution 8 Bits Total Unadjusted Error ±1⁄2 LSB and±1 LSB Single Supply 5 VDC Low Power 15 mW Conversion Time 100μs
Block DiagramDS005277-1
July 1999
ADC0816/ADC0817
8-Bit
Compatible
A/D
Converters
with
16-Channel
Multiplexer
