Rainbow Electronics ADC0848 - Manual

TL H 5016
ADC0844ADC0848
8-Bit
m
P
Compatible
AD
Converters
with
Multiplexer
Options
December 1994
ADC0844 ADC0848 8-Bit mP Compatible A D Converters
with Multiplexer Options
General Description
The ADC0844 and ADC0848 are CMOS 8-bit successive
approximation A D converters with versatile analog input
multiplexers 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 latch-
es that directly drive the data bus permit the A Ds to be
configured as memory locations or I O devices to the micro-
processor with no interface logic necessary
Features
Y Easy interface to all microprocessors
Y Operates ratiometrically or with 5 V DC
voltage reference
Y No zero or full-scale adjust required
Y 4-channel or 8-channel multiplexer with address logic
Y Internal clock
Y 0V to 5V input range with single 5V power supply
Y 0 3 standard width 20-pin or 24-pin DIP
Y 28 Pin Molded Chip Carrier Package
Key Specifications
Y Resolution 8 Bits
Y Total Unadjusted Error g LSB and g 1 LSB
Y Single Supply 5 V
DC
Y Low Power 15 mW
Y Conversion Time 40 ms
Block and Connection Diagrams
ADC0848 shown in
DIP Package
CH5-CH8 not included
on the ADC0844
TL H 5016 – 1
Dual-In-Line Package
TL H 5016 – 2
Top View
Dual-In-Line Package
TL H 5016 – 30
Top View
Molded Chip Carrier Package
TL H 5016 – 29
Top View
See Ordering Information
TRI-STATE is a registered trademark of National Semiconductor Corp
C1995 National Semiconductor Corporation RRD-B30M115 Printed in U S A