AD76881 查看數據表（PDF） - Analog Devices

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AD76881

18-Bit, 2 MSPS PulSAR 15 mW ADC in LFCSP (QFN)

Analog Devices 

AD7986

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Application Diagram ........................................................................ 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

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

Timing Specifications .................................................................. 5

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

Typical Performance Characteristics ............................................. 9

Terminology .................................................................................... 12

Theory of Operation ...................................................................... 13

Circuit Information.................................................................... 13

Converter Operation.................................................................. 13

Conversion Modes of Operation.............................................. 13

Typical Connection Diagram.................................................... 14

REVISION HISTORY

3/11—Rev. A to Rev. B

Added Common-Mode Input Range Parameter, Table 2 ........... 3

8/10—Rev. 0 to Rev. A

Changes to Conversion Time: CNV Rising Edge to Data

Available (Turbo Mode/Normal Mode) Parameter, Table 4 ....... 5

Changes to Figure 32...................................................................... 22

4/09—Revision 0: Initial Version

Analog Inputs.............................................................................. 15

Driver Amplifier Choice ........................................................... 15

Voltage Reference Input ............................................................ 16

Power Supply............................................................................... 16

Digital Interface .............................................................................. 17

Data Reading Options ............................................................... 18

CS Mode, 3-Wire Without Busy Indicator ............................. 19

CS Mode, 3-Wire with Busy Indicator .................................... 20

CS Mode, 4-Wire Without Busy Indicator ............................. 21

CS Mode, 4-Wire with Busy Indicator .................................... 22

Chain Mode Without Busy Indicator ...................................... 23

Chain Mode with Busy Indicator ............................................. 24

Application Hints ........................................................................... 25

Layout .......................................................................................... 25

Evaluating the AD7986 Performance ...................................... 25

Outline Dimensions ....................................................................... 27

Ordering Guide .......................................................................... 27

Rev. B | Page 2 of 28

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