Rainbow Electronics ADC1038 - Manual

TL H 10556
ADC1031ADC1034ADC1038
10-Bit
Serial
IO
AD
Converters
with
Analog
Multiplexer
and
TrackHold
Function
January 1995
ADC1031 ADC1034 ADC1038 10-Bit Serial
I O A D Converters with Analog Multiplexer
and Track Hold Function
General Description
The ADC1031 ADC1034 and ADC1038 are 10-bit succes-
sive approximation A D converters with serial I O The seri-
al input for the ADC1034 and ADC1038 controls a single-
ended analog multiplexer that selects one of 4 input chan-
nels (ADC1034) or one of 8 input channels (ADC1038) The
ADC1034 and ADC1038 serial output data can be config-
ured into a left- or right-justified format
An input track hold is implemented by a capacitive refer-
ence ladder and sampled-data comparator This allows the
analog input to vary during the A D conversion cycle
Separate serial I O and conversion clock inputs are provid-
ed to facilitate the interface to various microprocessors
Applications
Y Engine control
Y Process control
Y Instrumentation
Y Test equipment
Features
Y Serial I O (MICROWIRE TM compatible)
Y Separate asynchronous converter clock and serial data
I O clock
Y Analog input track hold function
Y Ratiometric or absolute voltage referencing
Y No zero or full scale adjustment required
Y 0V to 5V analog input range with single 5V power
supply
Y TTL MOS input output compatible
Y No missing codes
Key Specifications
Y Resolution 10 bits
Y Total unadjusted error g 1 LSB (max)
Y Single supply 5V g 5%
Y Power dissipation 20 mW (max)
Y Max conversion time (f C e 3 MHz) 13 7 ms (max)
Y Serial data exchange time (f S e 1 MHz) 10 ms (max)
TRI-STATE is a registered trademark of National Semiconductor Corporation
MICROWIRE TM is a trademark of National Semiconductor Corporation
Connection Diagrams
Dual-In-Line and SO Packages
TL H 10556 – 4
Top View
ADC1031 In NS Package N08E
TL H 10556 – 3
Top View
ADC1034 In NS Packages
J16A M16B or N16E
TL H 10556 – 2
Top View
ADC1038 In NS Packages
J20A M20B or N20A
Ordering Information
Industrial b40 C s T
A s a 85 C Package
ADC1031CIN N08E
ADC1034CIN N16E
ADC1034CIWM M16B
ADC1038CIN N20A
ADC1038CIWM M20B
Military b55 C s T A s a 125 C Package
ADC1034CMJ J16A
ADC1038CMJ J20A
C1995 National Semiconductor Corporation RRD-B30M75 Printed in U S A