Rainbow Electronics ADC10158 - Manual

TL H 11225
ADC10154
ADC10158
10-Bit
Plus
Sign
4
m
s
ADCs
with
4-
or
8-Channel
MUX
TrackHold
and
Reference
January 1995
ADC10154 ADC10158 10-Bit Plus Sign 4 ms ADCs
with 4- or 8-Channel MUX Track Hold and Reference
General Description
The ADC10154 and ADC10158 are CMOS 10-bit plus sign
successive approximation A D converters with versatile an-
alog input multiplexers track hold function and a 2 5V
band-gap reference The 4-channel or 8-channel multiplex-
ers can be software configured for single-ended differential
or pseudo-differential modes of operation
The input track hold is implemented using a capacitive ar-
ray and sampled-data comparator
Resolution can be programmed to be 8-bit 8-bit plus sign
10-bit or 10-bit plus sign Lower-resolution conversions can
be performed faster
The variable resolution output data word is read in two
bytes and can be formatted left justified or right justified
high byte first
Applications
Y Process control
Y Instrumentation
Y Test equipment
Features
Y 4- or 8- channel configurable multiplexer
Y Analog input track hold function
Y 0V to 5V analog input range with single a5V power
supply
Y b 5V to a5V analog input voltage range with g 5V sup-
plies
Y Fully tested in unipolar (single a5V supply) and bipolar
(dual
g 5V supplies) operation
Y Programmable resolution speed and output data format
Y Ratiometric or Absolute voltage reference operation
Y No zero or full scale adjustment required
Y No missing codes over temperature
Y Easy microprocessor interface
Key Specifications
Y Resolution 10-bit plus sign
Y Integral linearity error g 1 LSB (max)
Y Unipolar power dissipation 33 mW (max)
Y Conversion time (10-bit a sign) 4 4 ms (max)
Y Conversion time (8-bit) 3 2 ms (max)
Y Sampling rate (10-bit a sign) 166 kHz
Y Sampling rate (8-bit) 207 kHz
Y Band-gap reference 2 5V g 2 0% (max)
ADC10158 Simplified Block Diagram
TL H 11225 – 1
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation RRD-B30M75 Printed in U S A