ADC08131CIWM datasheet(1/21 Pages) NSC

Part #	ADC08131CIWM

Description	8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function

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Manufacturer	NSC [National Semiconductor (TI)]

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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 successive

approximation A/D converters with serial I/O and config-

urable input multiplexers with up to 8 channels. The serial

I/O is configured to comply with the NSC MICROWIRE™ se-

rial data exchange standard for easy interface to the

COPS™ 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 positive

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-differential modes. In addition, input voltage spans

as small as 1V can be accommodated.

Applications

n Digitizing automotive sensors

n Process control/monitoring

n Remote sensing in noisy environments

n Embedded diagnostics

Features

n Serial digital data link requires few I/O pins

n Analog input track/hold function

n 4- or 8-channel input multiplexer options with address

logic

n On-chip 2.5V band-gap reference (±2% over

temperature guaranteed)

n No zero or full scale adjustment required

n TTL/CMOS input/output compatible

n 0V to 5V analog input range with single 5V power

supply

Key Specifications

n Resolution

8 Bits

n Conversion time (fC = 1 MHz)

8 µs (Max)

n Power dissipation

20 mW (Max)

n Single supply

5 V

DC (±5%)

n Total unadjusted error

±1⁄2 LSB and ±1 LSB

n Linearity Error (VREF = 2.5V)

±1⁄2 LSB

n No missing codes (over temperature)

n On-board Reference

+2.5V ±1.5% (Max)

Ordering Information

Industrial

Package

(−40˚C

≤ T

A ≤ +85˚C)

ADC08131CIWM

M14B

ADC08134CIWM

M14B

ADC08138CIWM

M20B

TRI-STATE® is a registered trademark of National Semiconductor Corporation.

COPS™ microcontrollers and MICROWIRE™ are trademarks of National Semiconductor Corporation.

June 1999

DS010749

www.national.com

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ADC08131CIWM Datasheet(PDF) 1 Page - National Semiconductor (TI)

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