AD8571/AD8572/AD8574

Data Sheet

Rev. F | Page 2 of 28

TABLE OF CONTENTS

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

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

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

Pin Configurations ........................................................................... 1

Revision History ............................................................................... 3

Specifications..................................................................................... 4

5 V Electrical Characteristics...................................................... 4

2.7 V Electrical Characteristics................................................... 5

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

Thermal Characteristics .............................................................. 6

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

Typical Performance Characteristics ............................................. 7

Functional Description.................................................................. 15

Amplifier Architecture .............................................................. 15

Basic Auto-Zero Amplifier Theory.......................................... 15

Auto-Zero Phase......................................................................... 16

Amplification Phase................................................................... 16

High Gain, CMRR, and PSRR .................................................. 17

Maximizing Performance Through Proper Layout............... 17

1/f Noise Characteristics ........................................................... 18

Random Auto-Zero Correction Eliminates Intermodulation

Distortion .................................................................................... 18

Broadband and External Resistor Noise Considerations.......... 19

Output Overdrive Recovery...................................................... 19

Input Overvoltage Protection................................................... 19

Output Phase Reversal............................................................... 19

Capacitive Load Drive ............................................................... 20

Power-Up Behavior.................................................................... 20

Applications Information .............................................................. 21

5 V Precision Strain Gage Circuit ............................................ 21

3 V Instrumentation Amplifier ................................................ 21

High Accuracy Thermocouple Amplifier............................... 22

Precision Current Meter............................................................ 22

Precision Voltage Comparator.................................................. 22

Outline Dimensions....................................................................... 23

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