Datasheet

AD627 Data Sheet
Rev. E | Page 2 of 24
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Single Supply ................................................................................. 3
Dual Supply ................................................................................... 5
Dual and Single Supplies ............................................................. 6
Absolute Maximum Ratings ............................................................ 7
ESD Caution .................................................................................. 7
Pin Configurations and Function Descriptions ........................... 8
Typical Performance Characteristics ............................................. 9
Theory of Operation ...................................................................... 14
Using the AD627 ............................................................................ 15
Basic Connections ...................................................................... 15
Setting the Gain .......................................................................... 15
Reference Terminal .................................................................... 16
Input Range Limitations in Single-Supply Applications ....... 16
Output Buffering ........................................................................ 17
Input and Output Offset Errors ................................................ 17
Make vs. Buy: A Typical Application Error Budget ............... 18
Errors Due to AC CMRR .......................................................... 19
Ground Returns for Input Bias Currents ................................ 19
Layout and Grounding .............................................................. 20
Input Protection ......................................................................... 21
RF Interference ........................................................................... 21
Applications Circuits ...................................................................... 22
Classic Bridge Circuit ................................................................ 22
4 mA to 20 mA Single-Supply Receiver .................................. 22
Thermocouple Amplifier .......................................................... 22
Outline Dimensions ....................................................................... 24
Ordering Guide .......................................................................... 24
REVISION HISTORY
12/13—Rev. D to Re v. E
Change to Voltage Noise, 1 kHz Parameter, Table 3 .................... 6
Changes to Figure 35 ...................................................................... 14
Change to Equation 3, Input Range Limitations in Single-
Supply Applications Section .......................................................... 16
Changes to Table 8 .......................................................................... 17
Changes to Figure 40 ...................................................................... 17
Change to Table 9 ........................................................................... 18
Change to 4 mA to 20 mA Single-Supply Receiver Section ..... 22
11/07—Rev. C to Rev. D
Changes to Features .......................................................................... 1
Changes to Figure 29 to Figure 34 Captions ............................... 13
Changes to Setting the Gain Section ............................................ 15
Changes to Input Range Limitations in Single-Supply
Applications Section ....................................................................... 16
Changes to Tabl e 7 .......................................................................... 17
Changes to Figure 41 ...................................................................... 18
11/05—Rev. B to Rev. C
Updated Format .................................................................. Universal
Added Pin Configurations and Function
Descriptions Section ......................................................................... 8
Change to Figure 33 ....................................................................... 13
Updated Outline Dimensions ....................................................... 24
Changes to Ordering Guide .......................................................... 24
Rev. A to Rev. B
Changes to Figure 4 and Table I, Resulting Gain column ......... 11
Change to Figure 9 ......................................................................... 13