Rainbow Electronics ADC08138 - Manual

TL H 10749
ADC08131ADC08134ADC08138
8-Bit
High-Speed
Serial
IO
AD
Converters
with
Multiplexer
Options
Voltage
Reference
and
TrackHold
Function
December 1994
ADC08131 ADC08134 ADC08138 8-Bit High-Speed
Serial I O A D Converters with Multiplexer Options
Voltage Reference and Track Hold Function
General Description
The ADC08131 ADC08134 ADC08138 are 8-bit succes-
sive approximation A D converters with serial I O and con-
figurable input multiplexers with up to 8 channels The serial
I O is configured to comply with the NSC MICROWIRE
TM
serial data exchange standard for easy interface to the
COPS
TM family of controllers and can easily interface with
standard shift registers or microprocessors
All three devices provide a 2 5V band-gap derived reference
with guaranteed performance over temperature
A track hold function allows the analog voltage at the posi-
tive input to vary during the actual A D conversion
The analog inputs can be configured to operate in various
combinations of single-ended differential or pseudo-differ-
ential modes In addition input voltage spans as small as 1V
can be accommodated
Applications
Y Digitizing automotive sensors
Y Process control monitoring
Y Remote sensing in noisy environments
Y Embedded diagnostics
Features
Y Serial digital data link requires few I O pins
Y Analog input track hold function
Y 4- or 8-channel input multiplexer options with address
logic
Y On-chip 2 5V band-gap reference ( g 2% over tempera-
ture guaranteed)
Y No zero or full scale adjustment required
Y TTL CMOS input output compatible
Y 0V to 5V analog input range with single 5V power
supply
Key Specifications
Y Resolution 8 Bits
Y Conversion time (f
C e 1 MHz) 8 ms (Max)
Y Power dissipation 20 mW (Max)
Y Single supply 5 V DC ( g 5%)
Y Total unadjusted error g LSB and g 1 LSB
Y Linearity Error (V
REF e 2 5V) g LSB
Y No missing codes (over temperature)
Y On-board Reference a 2 5V g 1 5% (Max)
Ordering Information
Industrial
Package
(b40 C s T A s a 85 C)
ADC08131BIN ADC08131CIN N08E
ADC08134BIN ADC08134CIN N14A
ADC08138BIN ADC08138CIN N20A
ADC08134BIWM ADC08134CIWM M14B
ADC08138BIWM ADC08138CIWM M20B
Connection Diagrams
ADC08138
Dual-In-Line and
Small Outline
Packages
TL H 10749 – 2
ADC08134
Dual-In-Line and
Small Outline
Packages
TL H 10749 – 3
ADC08131
Dual-In-Line Package
TL H 10749 – 4
TRI-STATE is a registered trademark of National Semiconductor Corporation
COPS TM microcontrollers and MICROWIRE TM are trademarks of National Semiconductor Corporation
C1995 National Semiconductor Corporation RRD-B30M75 Printed in U S A