ADC0844/ADC0848

8-Bit µP Compatible A/D Converters with Multiplexer

Options

General Description

The ADC0844 and ADC0848 are CMOS 8-bit successive ap-

proximation A/D converters with versatile analog input multi-

plexers. The 4-channel or 8-channel multiplexers can be

software

configured

for

single-ended,

differential

or

pseudo-differential modes of operation.

The differential mode provides low frequency input common

mode rejection and allows offsetting the analog range of the

converter. In addition, the A/D’s reference can be adjusted

enabling the conversion of reduced analog ranges with 8-bit

resolution.

The A/Ds are designed to operate from the control bus of a

that directly drive the data bus permit the A/Ds to be config-

ured as memory locations or I/O devices to the microproces-

sor with no interface logic necessary.

Features

n Easy interface to all microprocessors

voltage reference

n No zero or full-scale adjust required

n 4-channel or 8-channel multiplexer with address logic

n Internal clock

n 0V to 5V input range with single 5V power supply

n 0.3" standard width 20-pin or 24-pin DIP

n 28 Pin Molded Chip Carrier Package

Key Specifications

n Resolution

8 Bits

n Total Unadjusted Error

n Single Supply

5 V

DC

n Low Power

15 mW

n Conversion Time

40 µs

Block and Connection Diagrams

DS005016-1

*ADC0848 shown in DIP Package CH5-CH8 not included on the ADC0844

June 1999

© 1999 National Semiconductor Corporation

DS005016

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