ADC08831IM National Semiconductor, ADC08831IM Datasheet

ADC08831IM

Manufacturer Part Number

ADC08831IM

Description

8-Bit Serial I/O CMOS A/D Converters with Multiplexer and Sample/Hold Function

Manufacturer

National Semiconductor

Datasheets

1.ADC08831IM.pdf (23 pages)

2.ADC08831IM.pdf (23 pages)

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ADC08831/ADC08832

8-Bit Serial I/O CMOS A/D Converters with Multiplexer

and Sample/Hold Function

General Description

The ADC08831/ADC08832 are 8-bit successive approxima-

tion Analog to Digital converters with 3-wire serial interfaces

and a configurable input multiplexer for 2 channels. The se-

rial I/O will interface to COPS

PLD’s, microprocessors, DSP’s, or shift registers. The serial

I/O is configured to comply with the NSC MICROWIRE

rial data exchange standard.

ADC08831/ADC08832 automatically go into low power

mode whenever they are not performing conversions.

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

pseudo-differential modes. The voltage reference input can

be adjusted to allow encoding of small analog voltage spans

to the full 8-bits of resolution.

Applications

n Digitizing sensors and waveforms

n Process control monitoring

Typical Application

COPS

MICROWIRE

TRI-STATE

™

is a trademark of National Semiconductor Corporation.

minimize

™

is a trademark of National Semiconductor Corporation.

total

single-ended,

power

™

family of micro-controllers,

consumption,

DS100108

differential,

™

se-

the

n Remote sensing in noisy environments

n Instrumentation

n Embedded Systems

Features

n 3-wire serial digital data link requires few I/O pins

n Analog input track/hold function

n 2-channel input multiplexer option with address logic

n Analog input voltage range from GND to V

n No zero or full scale adjustment required

n TTL/CMOS input/output compatible

n Superior pin compatible replacement for ADC0831/2

Key Specifications

n Resolution:

n Conversion time (f

n Power dissipation: 8.5mW (typ)

n Low power mode: 3.0mW (typ)

n Single supply: 5V

n Total unadjusted error:

n No missing codes over temperature

8 bits

= 2 MHz): 4µs (max)

1LSB

DS100108-44

DS100108-43

September 1999

www.national.com

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