
AD620 
TABLE OF CONTENTS 
Specifications.....................................................................................3
Rev. G | Page 2 of 20 
Absolute Maximum Ratings............................................................5
ESD Caution..................................................................................5
Typical Performance Characteristics..............................................7
Theory of Operation.......................................................................13
Gain Selection..............................................................................16
Input and Output Offset Voltage ..............................................16
Reference Terminal.....................................................................16
Input Protection..........................................................................16
RF Interference............................................................................16
Common-Mode Rejection.........................................................17
Grounding....................................................................................17
Ground Returns for Input Bias Currents.................................18
Outline Dimensions........................................................................19
Ordering Guide...........................................................................20
REVISION HISTORY 
12/04—Rev. F to Rev. G
Updated Format..................................................................Universal 
Change to Features............................................................................1 
Change to Product Description.......................................................1 
Changes to Specifications.................................................................3 
Added Metallization Photograph....................................................4 
Replaced Figure 4-Figure 6..............................................................6 
Replaced Figure 15............................................................................7 
Replaced Figure 33..........................................................................10 
Replaced Figure 34 and Figure 35.................................................10 
Replaced Figure 37..........................................................................10 
Changes to Table 3 ..........................................................................13 
Changes to Figure 41 and Figure 42.............................................14 
Changes to Figure 43 ......................................................................15 
Change to Figure 44........................................................................17 
Changes to Input Protection section............................................15 
Deleted Figure 9...............................................................................15 
Changes to RF Interference section..............................................15 
Edit to Ground Returns for Input Bias Currents section...........17 
Added AD620CHIPS to Ordering Guide....................................19 
7/03—Data Sheet changed from REV. E to REV. F
Edit to FEATURES............................................................................1 
Changes to SPECIFICATIONS.......................................................2 
Removed AD620CHIPS from ORDERING GUIDE...................4 
Removed METALLIZATION PHOTOGRAPH...........................4 
Replaced TPCs 1–3...........................................................................5 
Replaced TPC 12...............................................................................6 
Replaced TPC 30...............................................................................9 
Replaced TPCs 31 and 32...............................................................10 
Replaced Figure 4............................................................................10 
Changes to Table I...........................................................................11 
Changes to Figures 6 and 7............................................................12 
Changes to Figure 8........................................................................13 
Edited INPUT PROTECTION section........................................13 
Added new Figure 9........................................................................13 
Changes to RF INTERFACE section............................................14 
Edit to GROUND RETURNS FOR INPUT BIAS CURRENTS 
section...............................................................................................15 
Updated OUTLINE DIMENSIONS.............................................16