GENERAL DESCRIPTION

The ADT7462 is a flexible systems monitor IC, suitable for use in a wide variety of applications. It can monitor temperature in up to three remote locations, as well as its ambient temperature.

There are up to four PWM outputs. These can be used to control the speed of a cooling fan by varying the duty cycle of the PWM drive signal applied to the fan. The ADT7462 supports high frequency PWM for 4-wire fans and low frequency PWM for 2-wire and 3-wire fans. There are up to eight TACH inputs, which can be used to measure the speed of 3-wire and 4-wire fans. There are up to 13 voltage monitoring inputs, ranging from 12 V to 0.9 V.

FEATURES

One local and up to three remote temperature channels

Series resistance cancellation on remote channels

Thermal protection using THERM pins

Up to four PWM fan drive outputs

Supports both high and low frequency PWM drives

Up to eight TACH inputs

Measures the speed of 3-wire and 4-wire fans

Automatic fan speed control loop

Includes dynamic TMIN control

Monitors up to 13 voltage inputs

Monitors up to 7 VID inputs

Includes VID-on-fly support

Bidirectional reset

Chassis intrusion detect

SMBus 1.1- and SMBus 1.0-compatible

3.3 V and 5 V operation

Extended operating range from ?40°C to +125°C

Space-saving 32-lead chip scale package

APPLICATIONS

Servers and personal computers

Telecommunications equipment

Test equipment and measurement instruments