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National Semiconductor - 8-Bit uP Compatible A/D Converters with Multiplexer Options

Numéro de référence ADC0844CCJ
Description 8-Bit uP Compatible A/D Converters with Multiplexer Options
Fabricant National Semiconductor 
Logo National Semiconductor 





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ADC0844CCJ fiche technique
June 1999
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
wide variety of microprocessors. TRI-STATE® output latches
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
n Operates ratiometrically or with 5 VDC
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
n Total Unadjusted Error
n Single Supply
n Low Power
n Conversion Time
8 Bits
±12 LSB and ± 1 LSB
5 VDC
15 mW
40 µs
Block and Connection Diagrams
*ADC0848 shown in DIP Package CH5-CH8 not included on the ADC0844
TRI-STATE® is a registered trademark of National Semiconductor Corp.
© 1999 National Semiconductor Corporation DS005016
DS005016-1
www.national.com

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