ADM1025/ADM1025A

Preliminary Technical Data

Rev. P5 | Page 2 of 21| www.onsemi.com

TABLE OF CONTENTS

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

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

Product Description .........................................................................1

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

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

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

Absolute Maximum Ratings ............................................................5

Thermal Characteristics...............................................................5

ESD Caution ..................................................................................5

Pin Configuration and Function Descriptions .............................6

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

General Description..........................................................................9

Measurement Inputs .....................................................................9

Sequential Measurement..............................................................9

Processor Voltage ID ....................................................................9

ADD/RST/INT/NTO ...................................................................9

Internal Registers of the ADM1025/ADM1025A.....................9

Serial Bus Interface .......................................................................9

Measurement Inputs ...................................................................11

A/D Converter.............................................................................11

Input Circuits...............................................................................12

Temperature Measurement System ..............................................13

Internal Temperature Measurement ........................................13

External Temperature Measurement........................................13

Layout Considerations ...................................................................14

Limit Values .................................................................................14

Status Registers............................................................................14

Monitoring Cycle Time..............................................................14

Input Safety ..................................................................................14

Layout and Grounding...............................................................15

RST/INT Output .........................................................................15

Genterating an SMBALERT ......................................................15

NAND Tree Tests ........................................................................16

Using the ADM1025/ADM1025A................................................17

Power-On Reset ..........................................................................17

Initialization ................................................................................17

Using the Configuration Register.............................................17

Using the Offset Register ...........................................................17

Starting Conversion....................................................................17

Reduced Power and Shutdown Mode ......................................17

5 V Operation..............................................................................17

Registers ...........................................................................................18

Outline Dimensions........................................................................21

Ordering Guide ...........................................................................21

REVISION HISTORY

02/08—Rev P5: Conversion to ON Semiconductor

x/07—Rev. C to Rev. D

4/03—Rev. B to Rev. C

10/02—Rev. A to Rev. B

11/99—Revision 0: Initial Version