ADC10838CIN datasheet(1/30 Pages) NSC

Nome de Peças	ADC10838CIN

Descrição Electrónicos	10-Bit Plus Sign Serial I/O A/D Converters with MUX, Sample/Hold and Reference

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Fabricante Electrônico	NSC [National Semiconductor (TI)]

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TLH11391

December 1994

ADC10831 ADC10832 ADC10834 ADC10838

10-Bit Plus Sign Serial IO AD Converters

with MUX SampleHold and Reference

General Description

This series of CMOS 10-bit plus sign successive approxima-

tion AD converters features versatile analog input multi-

plexers samplehold and a 25V band-gap reference The

1 2 4 or 8-channel multiplexers can be software configured

for single-ended or differential mode of operation

An input samplehold is implemented by a capacitive refer-

ence ladder and sampled-data comparator This allows the

analog input to vary during the AD conversion cycle

In the differential mode valid outputs are obtained even

when the negative inputs are greater than the positive be-

cause of the 10-bit plus sign output data format

The serial IO is configured to comply with the NSC

MICROWIRETM serial data exchange standard for easy in-

terface to the COPSTM and HPCTM families of controllers

and can easily interface with standard shift registers and

microprocessors

Applications

Y

Medical instruments

Y

Remote instrumentation

Y

Test equipment

Features

Y

b

5V to a5V analog voltage range with g5V supplies

Y

Serial IO (MICROWIRE compatible)

Y

1 2 4 or 8-channel differential or single-ended

multiplexer

Y

Software or hardware power down

Y

Analog input samplehold function

Y

Ratiometric or Absolute voltage referencing

Y

No zero or full scale adjustment required

Y

No missing codes over temperature

Y

TTLMOS inputoutput compatible

Y

Standard DIP and SO packages

Key Specifications

Y

Resolution

10 bits plus sign

Y

Dual supply

g

5V

Y

Power dissipation

59 mW (Max)

Y

In power down mode

33 mW

Y

Conversion time

5 ms (Max)

Y

Sampling rate

74 kHz (Max)

Y

Band-gap reference

25V g2% (Max)

ADC10838 Simplified Block Diagram

TLH11391 – 1

COPSTM HPCTM and MICROWIRETM are trademarks of National Semiconductor Corporation

C1995 National Semiconductor Corporation

RRD-B30M75Printed in U S A

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