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