AD7691 データシートの表示（PDF） - Analog Devices

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AD7691

18-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC in MSOP/LFCSP

Analog Devices 

AD7691

TABLE OF CONTENTS

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

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

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

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

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

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

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

Absolute Maximum Ratings............................................................ 7

Thermal Resistance ...................................................................... 7

ESD Caution.................................................................................. 7

Pin Configurations and Function Descriptions ........................... 8

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

Terminology .................................................................................... 13

Theory of Operation ...................................................................... 14

Circuit Information.................................................................... 14

Converter Operation.................................................................. 14

Typical Connection Diagram ................................................... 15

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

REVISION HISTORY

6/15—Rev. D to Rev. E

Change to Digital Interface Section ............................................. 17

Change to CS Mode, 3-Wire with Busy Indicator Section........ 19

Change to CS Mode, 4-Wire with Busy Indicator Section........ 21

Changes to the Ordering Guide.................................................... 25

7/14—Rev. C to Rev. D

Changed QFN (LFCSP) to LFCSP .............................. Throughout

Changes to Features Section............................................................ 1

Added Patent Note, Note 1 .............................................................. 1

Change to Acquisition Time Parameter, Table 5 .......................... 6

Changes to Evaluating the AD7691 Performance Section........ 24

Updated Outline Dimensions ....................................................... 25

Changes to Ordering Guide .......................................................... 25

3/12—Rev. B to Rev. C

Change to Table 9 ........................................................................... 14

Changes to Ordering Guide .......................................................... 25

7/11—Rev. A to Rev. B

Changes to Common-Mode Input Range Min Parameter ......... 3

Added EPAD Note to Figure 6 and Table 8................................... 8

Updated Outline Dimensions ....................................................... 25

Data Sheet

Driver Amplifier Choice ........................................................... 16

Single-to-Differential Driver .................................................... 16

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

Power Supply............................................................................... 17

Supplying the ADC from the Reference.................................. 17

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

CS Mode, 3-Wire Without Busy Indicator ............................. 18

CS Mode, 3-Wire with Busy Indicator .................................... 19

CS Mode, 4-Wire Without Busy Indicator ............................. 20

CS Mode, 4-Wire with Busy Indicator .................................... 21

Chain Mode Without Busy Indicator ...................................... 22

Chain Mode with Busy Indicator ............................................. 23

Application Hints ........................................................................... 24

Layout .......................................................................................... 24

Evaluating the AD7691 Performance ...................................... 24

Outline Dimensions ....................................................................... 25

Ordering Guide .......................................................................... 25

11/07—Rev. 0 to Rev. A

Deleted QFN Package in Development References ....... Universal

Changes to Features, Applications, Figure 1 and Figure 2...........1

Changes to Accuracy, Table 2 ..........................................................3

Changes to Power Dissipation, Table 3...........................................4

Added Thermal Resistance Section ................................................7

Changes to Figure 22...................................................................... 11

Changes to Format ......................................................................... 12

Changes to Terminology Section ................................................. 13

Changes to Format and Figure 29 ................................................ 15

Inserted Figure 31........................................................................... 15

Changes to Format ......................................................................... 17

Changes to Figure 44...................................................................... 22

Changes to Figure 46...................................................................... 23

Updated QFN Outline Dimensions ............................................. 25

Changes to Ordering Guide .......................................................... 25

7/06—Revision 0: Initial Version

Rev. E | Page 2 of 28

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