AD637

Rev. K | Page 2 of 20

TABLE OF CONTENTS

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

 

Functional Block Diagram .............................................................. 1

 

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

 

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

 

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

 

Absolute Maximum Ratings............................................................ 5

 

ESD Caution.................................................................................. 5

 

Pin Configurations and Function Descriptions ........................... 6

 

Functional Description .................................................................... 7

 

Standard Connection ................................................................... 8

 

Chip Select..................................................................................... 8

 

Optional Trims for High Accuracy ............................................ 8

 

Choosing the Averaging Time Constant....................................9

 

Frequency Response .................................................................. 11

 

AC Measurement Accuracy and Crest Factor ........................ 12

 

Connection for dB Output........................................................ 12

 

dB Calibration............................................................................. 13

 

Low Frequency Measurements................................................. 14

 

Vector Summation ..................................................................... 14

 

Evaluation Board ............................................................................ 16

 

Outline Dimensions ....................................................................... 19

 

Ordering Guide .......................................................................... 20

 

REVISION HISTORY

2/11—Rev. J to Rev. K

Changes to Figure 15...................................................................... 11

Changes to Figure 16...................................................................... 12

Changes to Evaluation Board Section and Figure 23................. 16

Added Figure 24; Renumbered Sequentially .............................. 17

Changes to Figure 25 Through Figure 29.................................... 17

Changes to Figure 30...................................................................... 18

Added Figure 31.............................................................................. 18

Deleted Table 6; Renumbered Sequentially ................................ 18

Changes to Ordering Guide .......................................................... 20

4/07—Rev. I to Rev. J

Added Evaluation Board Section ................................................. 16

Updated Outline Dimensions ....................................................... 20

10/06—Rev. H to Rev. I

Changes to Table 1............................................................................ 3

Changes to Figure 4.......................................................................... 7

Changes to Figure 7.......................................................................... 9

Changes to Figure 16, Figure 18, and Figure 19 ......................... 12

Changes to Figure 20...................................................................... 13

12/05—Rev. G to Rev. H

Updated Format..................................................................Universal

Changes to Figure 1.......................................................................... 1

Changes to Figure 11...................................................................... 10

Updated Outline Dimensions ....................................................... 16

Changes to Ordering Guide .......................................................... 17

4/05—Rev. F to Rev. G

Updated Format..................................................................Universal

Changes to Figure 1...........................................................................1

Changes to General Description .....................................................1

Deleted Product Highlights .............................................................1

Moved Figure 4 to Page ....................................................................8

Changes to Figure 5...........................................................................9

Changes to Figure 8........................................................................ 10

Changes to Figure 11, Figure 12, Figure 13, and Figure 14....... 11

Changes to Figure 19...................................................................... 14

Changes to Figure 20...................................................................... 14

Changes to Figure 21...................................................................... 16

Updated Outline Dimensions....................................................... 17

Changes to Ordering Guide .......................................................... 18

3/02—Rev. E to Rev. F

Edits to Ordering Guide ...................................................................3