
AD8571/AD8572/AD8574
TABLE OF CONTENTS
Features..............................................................................................1
Rev. B | Page 2 of 24
Applications.......................................................................................1
General Description.........................................................................1
Pin Configurations...........................................................................1
Revision History...............................................................................2
Specifications.....................................................................................3
5 V Electrical Characteristics......................................................3
2.7 V Electrical Characteristics...................................................4
Absolute Maximum Ratings............................................................5
Thermal Characteristics..............................................................5
ESD Caution..................................................................................5
Typical Performance Characteristics.............................................6
Functional Description..................................................................14
Amplifier Architecture ..............................................................14
Basic Auto-Zero Amplifier Theory..........................................14
Auto-Zero Phase.........................................................................14
Amplification Phase...................................................................15
High Gain, CMRR, PSRR..........................................................16
Maximizing Performance
T
hrough Proper Layout ................16
1/f Noise Characteristics ........................................................... 17
Random Auto-Zero Correction Eliminates Intermodulation
Distortion.................................................................................... 17
Broadband and External Resistor Noise Considerations.......... 18
Output Overdrive Recovery...................................................... 18
Input Overvoltage Protection................................................... 18
Output Phase Reversal............................................................... 18
Capacitive Load Drive............................................................... 19
Power-Up Behavior.................................................................... 19
Applications..................................................................................... 20
5 V Precision Strain Gage Circuit............................................ 20
3 V Instrumentation Amplifier................................................ 20
High Accuracy Thermocouple Amplifier............................... 20
Precision Current Meter............................................................ 21
Precision Voltage Comparator.................................................. 21
Outline Dimensions....................................................................... 22
Ordering Guide .......................................................................... 23
REVISION HISTORY
09/06—Rev. A to Rev. B
Updated Format..................................................................Universal
Renumbered Figures..........................................................Universal
Changes to Figure 50......................................................................14
Changes to Figure 51......................................................................15
Changes to Figure 66......................................................................21
Updated Outline Dimensions.......................................................22
Changes to Ordering Guide..........................................................23
07/03—Rev. 0 to Rev. A
Renumbered Figures..........................................................Universal
Changes to Ordering Guide.............................................................4
Change to Figure 15....................................................................... 16
Updated Outline Dimensions....................................................... 19
10/99—Revision 0: Initial Version