ADC10734CIMSA datasheet(1/27 Pages) NSC

Part #	ADC10734CIMSA

Description	10-Bit Plus Sign Serial I/O A/D Converters with Mux,

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Manufacturer	NSC [National Semiconductor (TI)]

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ADC10731/ADC10732/ADC10734/ADC10738

10-Bit Plus Sign Serial I/O A/D Converters with Mux,

Sample/Hold and Reference

General Description

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

tion A/D converters features versatile analog input multiplex-

ers, sample/hold and a 2.5V 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 sample/hold is implemented by a capacitive refer-

ence ladder and sampled-data comparator. This allows the

analog input to vary during the A/D 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 I/O is configured to comply with the NSC MI-

CROWIRE™ serial data exchange standard for easy inter-

face to the COPS™ and HPC™ families of controllers, and

can easily interface with standard shift registers and micro-

processors.

Features

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

supply

n Serial I/O (MICROWIRE compatible)

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

multiplexer

n Software or hardware power down

n Analog input sample/hold function

n Ratiometric or absolute voltage referencing

n No zero or full scale adjustment required

n No missing codes over temperature

n TTL/CMOS input/output compatible

n Standard DIP and SO packages

Key Specifications

n Resolution

10 bits plus sign

n Single supply

5V

n Power dissipation

37 mW (Max)

n In powerdown mode

18 µW

n Conversion time

5µs (Max)

n Sampling rate

74 kHz (Max)

n Band-gap reference

2.5V ±2% (Max)

Applications

n Medical instruments

n Portable and remote instrumentation

n Test equipment

ADC10738 Simplified Block Diagram

COPS™, HPC™ and MICROWIRE™ are trademarks of National Semiconductor Corporation.

DS011390-1

May 1999

DS011390

www.national.com

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ADC10734CIMSA Datasheet(PDF) 1 Page - National Semiconductor (TI)

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