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ADC08131CIWM-ADC08134CIWM-ADC08134CIWM.-ADC08138CIWM
8-Bit High Speed Serial I/O A/D Converter with Multiplexer Options, Voltage Reference and Track/Hold Function
ADC08131/ADC08134/ADC08138
8-Bit High-Speed Serial I/O A/D Converters with
Multiplexer Options, V oltage Reference, and Track/Hold
Function
General DescriptionThe ADC08131/ADC08134/ADC08138 are 8-bit successive
approximation A/D converters with serial I/O and config-
urable input multiplexers withupto8 channels. The serial
I/Ois configuredto comply with the NSC MICROWIRE™
serial data exchange standard for easy interfaceto the
COPS™ familyof controllers, and can easily interface with
standard shift registersor microprocessors.
All three devices providea 2.5V band-gap derived reference
with guaranteed performance over temperature. track/hold function allowsthe analog voltageatthe positive
inputto vary duringthe actual A/D conversion.
The analog inputs canbe configuredto operatein various
combinations of single-ended, differential, or
pseudo-differential modes.In addition, input voltage spans smallas1V canbe accommodated.
Applications Digitizing automotive sensors Process control/monitoring Remote sensingin noisy environments Embedded diagnostics
Features Serial digital data link requires fewI/O pins Analog input track/hold function4-or 8-channel input multiplexer options with address
logic On-chip 2.5V band-gap reference (±2% over
temperature guaranteed) No zeroorfull scale adjustment required TTL/CMOS input/output compatible0Vto5V analog input range with single5V power
supply
Key Specifications Resolution 8 Bits Conversion time(fC=1 MHz) 8μs (Max) Power dissipation 20 mW (Max) Single supply 5 VDC (±5%) Total unadjusted error ±1⁄2 LSB and±1 LSB Linearity Error (VREF= 2.5V) ±1⁄2 LSB No missing codes (over temperature) On-board Reference +2.5V ±1.5% (Max)
Ordering Information
Industrial Package
(−40˚C≤
TA≤
+85˚C)ADC08131CIWM M14B
ADC08134CIWM M14B
ADC08138CIWM M20B
June 1999
ADC08131/ADC08134/ADC08138
8-Bit
High-Speed
Serial
I/O
A/D
Converters
with
Multiplexer
Options,
oltage
Reference,
and
rack/Hold
Function
