AD7938 Просмотр технического описания (PDF) - Analog Devices

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AD7938

8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer

Analog Devices 

TABLE OF CONTENTS

AD7938—Specifications.................................................................. 3

AD7939—Specifications.................................................................. 5

Timing Specifications....................................................................... 7

Absolute Maximum Ratings............................................................ 8

ESD Caution.................................................................................. 8

Pin Configuration and Function Description .............................. 9

Terminology .................................................................................... 11

Typical Performance Characteristics ........................................... 13

On-Chip Registers .......................................................................... 15

Control Register.......................................................................... 15

Sequencer Operation ................................................................. 16

Shadow Register.......................................................................... 16

Circuit Information ........................................................................ 17

Converter Operation.................................................................. 17

ADC Transfer Function............................................................. 17

REVISION HISTORY

10/04—Revision 0: Initial Version

AD7938/AD7939

Typical Connection Diagram ................................................... 18

Analog Input Structure.............................................................. 18

Analog Inputs.............................................................................. 19

Analog Input Selection .............................................................. 21

Reference Section ....................................................................... 22

Parallel Interface......................................................................... 24

Power Modes of Operation....................................................... 27

Power vs. Throughput Rate....................................................... 28

Microprocessor Interfacing....................................................... 28

Application Hints ........................................................................... 30

Grounding and Layout .............................................................. 30

PCB Design Guidelines for Chip Scale Package .................... 30

Evaluating the AD7938/AD7939 Performance ...................... 30

Outline Dimensions ....................................................................... 31

Ordering Guide .......................................................................... 32

Rev. 0 | Page 2 of 32

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