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PowerSupplyMonitorASIC

ADM1040

FEATURES

Monitors Multiple Voltage Rails (240VA Lim-

ited)

Monitors Bulk DC, Op-Amp Supply, 5V Supply

Monitors Voltage Rails 1,2 and 3 Currents

Up to 3 Fan Speed Measurement Channels

Up to 6 General-Purpose Logic Inputs

External Temperature Measurement with Remote

Diode (Two Channels)

On-Chip Temperature Sensor

Limit Comparison of all Monitored Values

FUNCTIONAL BLOCK DIAGRAM

REV. PrG 01/'01

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

World Wide Web Site: http://www.analog.com

Fax: 617/326-8703

© Analog Devices, Inc., 2001

PreliminaryTechnicalData

SMBus is a trademark

Analog Fan Speed Control Output

SMBus

SMBus ALERT Capability

Shutdown Output for Overtemperature and

240VA Faults

APPLICATIONS

Network Servers and Personal Computers

Microprocessor-Based Office Equipment

Test Equipment and Measuring Instruments

PRELIMINARY TECHNICAL DATA

INPUT

SIGNAL

CONDITIONING

AND

ANALOG

MULTIPLEXER

BANDGAP

REFERENCE

GND

SERIAL

BUS

INTERFACE

SCL

SDA

GPIO

REGISTERS

A0/NTEST_OUT

ADDRESS

POINTER

REGISTER

ADM1040

TEMPERATURE

CONFIGURATION

REGISTER

FAN

SPEED

COUNTER

8-BIT

ADC

8K BYTES

E2PROM

GPI2/I2_+

GPI3/I2_-/AIN2

GPI4/I3_+

GPI5/I3_-

D1-/GPI2

D1+/GPI3

D2-/GPI4/FAN2

D2+/GPI5/FAN3

I1_+

I1_-/AIN1

AIN3

AIN4

AIN5

GPI0

FAN1/GPI1

VALUE AND

LIMIT

REGISTERS

LIMIT

COMPARATORS

INT MASK

REGISTERS

CONFIGURATION

REGISTERS

INTERRU PT

STATUS

REGISTERS

INTERRUPT

MASKING

ANALOG

OUTPUT REGISTER

AND 8-BIT DAC

ALERT

1

BANDGAP

TEMP.

SENSOR

4

5

7

9

10

11

12

13

14

15

16

17

18

19

20

21

A1

2

3

22

23

8

6

FROM NAND

TREE OUTPUT

TO NAND

TREE

ENABLE

24

SHDN

DAC/NTEST_IN