Datasheet

AD8421 Data Sheet
Rev. 0 | Page 2 of 28
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Pin Connection Diagram ................................................................ 1
General Description......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
AR and BR Grades........................................................................ 3
ARM and BRM Grades................................................................ 5
Absolute Maximum Ratings............................................................ 8
Thermal Resistance...................................................................... 8
ESD Caution.................................................................................. 8
Pin Configuration and Function Descriptions............................. 9
Typical Performance Characteristics ........................................... 10
Theory of Operation ...................................................................... 20
Architecture................................................................................. 20
Gain Selection............................................................................. 20
Reference Terminal .................................................................... 21
Input Voltage Range................................................................... 21
Layout .......................................................................................... 21
Input Bias Current Return Path ............................................... 22
Input Voltages Beyond the Supply Rails.................................. 22
Radio Frequency Interference (RFI)........................................ 23
Calculating the Noise of the Input Stage................................. 23
Applications Information.............................................................. 25
Differential Output Configuration .......................................... 25
Driving an ADC ......................................................................... 26
Outline Dimensions....................................................................... 27
Ordering Guide .......................................................................... 27
REVISION HISTORY
5/12—Revision 0: Initial Version