AD7798BRU Просмотр технического описания (PDF) - Analog Devices

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AD7798BRU

3 V/5 V/ CMOS/ 500 uA Signal Conditioning ADC

Analog Devices 

AD7798/AD7799

TABLE OF CONTENTS

Specifications..................................................................................... 3

Timing Characteristics..................................................................... 6

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

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

Pin Configuration and Function Descriptions............................. 9

Output Noise and Resolution Specifications .............................. 10

AD7798 ........................................................................................ 10

AD7799 ........................................................................................ 11

Typical Performance Characteristics ........................................... 12

On-Chip Registers .......................................................................... 13

Communications Register......................................................... 13

Status Register ............................................................................. 14

Mode Register ............................................................................. 14

Configuration Register .............................................................. 16

Data Register ............................................................................... 17

ID Register................................................................................... 17

IO Register................................................................................... 17

Offset Register............................................................................. 18

Full-Scale Register ...................................................................... 18

REVISION HISTORY

Prelim E, November 2004: Initial Version

Preliminary Technical Information

ADC Circuit Information.............................................................. 19

Overview ..................................................................................... 19

Digital Interface .......................................................................... 20

Circuit Description......................................................................... 23

Analog Input Channel ............................................................... 23

Instrumentation Amplifier........................................................ 23

Bipolar/Unipolar Configuration .............................................. 23

Data Output Coding .................................................................. 23

Burnout Currents ....................................................................... 24

Reference ..................................................................................... 24

Reference Detect......................................................................... 24

Reset ............................................................................................. 24

AVDD Monitor ............................................................................. 24

Calibration................................................................................... 24

Grounding and Layout .............................................................. 25

Applications..................................................................................... 27

Weigh Scales................................................................................ 27

Outline Dimensions ....................................................................... 28

Ordering Guide .......................................................................... 28

Pr.E 10/04 | Page 2 of 28

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