ADA4945-1ACPZ-R2 datasheet(2/44 Pages) AD

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ADA4945-1

Data Sheet

Rev. 0 | Page 2 of 44

TABLE OF CONTENTS

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

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

Functional Block Diagram .............................................................. 1

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

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Supply Voltage (VS) = 10 V ......................................................... 3

VS = 5 V.......................................................................................... 7

VS = 3 V........................................................................................ 11

Absolute Maximum Ratings.......................................................... 15

Thermal Resistance .................................................................... 15

Maximum Power Dissipation ................................................... 15

ESD Caution................................................................................ 15

Pin Configuration and Function Descriptions........................... 16

Typical Performance Characteristics ........................................... 17

Full Power Mode.......................................................................... 17

Low Power Mode........................................................................ 25

Test Circuits..................................................................................... 33

Terminology .................................................................................... 34

Theory of Operation ...................................................................... 35

Fully Differential and Common-Mode Signal Paths............. 35

Output Voltage Clamp............................................................... 36

Power Modes............................................................................... 36

Applications Information .............................................................. 37

Analyzing an Application Circuit ............................................ 37

Setting the Closed-Loop Gain .................................................. 37

Estimating the Output Noise Voltage...................................... 37

Impact of Mismatches in the Feedback Networks................. 38

Calculating the Input Impedance of an Application Circuit..... 38

Input Common-Mode Voltage Range..................................... 40

Input and Output Capacitive AC Coupling............................ 40

Setting the Output Common-Mode Voltage.......................... 40

Disable Pin .................................................................................. 40

Driving a Capacitive Load......................................................... 40

Output Clamps ........................................................................... 41

Driving a High Precision ADC ................................................ 42

Layout, Grounding, and Bypassing.............................................. 43

Outline Dimensions....................................................................... 44

Ordering Guide .......................................................................... 44

REVISION HISTORY

4/2019—Revision 0: Initial Version

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