LTC2949 datasheet(2/80 Pages) AD

2 / 80 page

LTC2949

Rev A

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TABLE OF CONTENTS

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

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

Typical Application ............................................................................................................... 1

Description......................................................................................................................... 1

Absolute Maximum Ratings..................................................................................................... 3

Order Information................................................................................................................. 3

Pin Configuration ................................................................................................................. 3

Electrical Characteristics........................................................................................................ 4

Typical Performance Characteristics .........................................................................................10

Pin Functions .....................................................................................................................11

Pin Functions .....................................................................................................................12

Block Diagram....................................................................................................................13

Operation..........................................................................................................................14

Overview............................................................................................................................................................... 14

Modes of Operation .............................................................................................................................................. 15

Data Acquisition Channels .................................................................................................................................... 16

Power Measurement............................................................................................................................................. 19

Charge, Energy and Time...................................................................................................................................... 20

Overcurrent Comparators ..................................................................................................................................... 21

SERIAL INTERFACES ............................................................................................................22

Serial Interfaces Overview .................................................................................................................................... 22

4-Wire Serial Peripheral Interface (SPI) Physical Layer........................................................................................ 22

2-Wire Isolated Interface (isoSPI) Physical Layer................................................................................................. 23

Data Link Layer..................................................................................................................................................... 28

Network Layer....................................................................................................................................................... 28

REGISTER MAP...................................................................................................................41

REGISTER Description ..........................................................................................................42

MEMORY MAP AND Paging Mechanism............................................................................................................... 42

Register Map PAGE0............................................................................................................................................. 44

Register Map PAGE1 ............................................................................................................................................ 62

Application Information.........................................................................................................68

Temperature Measurement .................................................................................................................................. 68

Sense Resistor Temperature Compensation ......................................................................................................... 69

Current and Voltage Input Filtering ....................................................................................................................... 74

Powering the LTC2949 ......................................................................................................................................... 75

Package Description ............................................................................................................78

Revision History .................................................................................................................79

Typical Application ..............................................................................................................80

Related Parts .....................................................................................................................80

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