PRODUCT DESCRIPTION

The ADM1031 is an ACPI-compliant three-channel digital thermometer and under/over temperature alarm, for use in personal computers and thermal management systems.

FEATURES

Optimized for Pentium® III: Allows Reduced Guardbanding

Software and Automatic Fan Speed Control

Automatic Fan Speed Control Allows Control

Independent of CPU Intervention after Initial Setup

Control Loop Minimizes Acoustic Noise and Battery

Consumption

Remote Temperature Measurement Accurate to 1°C

Using Remote Diode (Two Channels)

0.125°C Resolution on External Temperature Channels

Local Temperature Sensor with 0.25°C Resolution

Pulsewidth Modulation Fan Control (PWM) for Two Fans

Programmable PWM Frequency

Programmable PWM Duty Cycle

Tach Fan Speed Measurement (Two Channels)

Analog Input To Measure Fan Speed of 2-Wire Fans

(Using Sense Resistor)

2-Wire System Management Bus (SMBus) with ARA

Support

Overtemperature THERM Output Pin for CPU Throttling

Programmable INT Output Pin

Configurable Offsets for Temperature Channels

3 V to 5.5 V Supply Range

Shutdown Mode to Minimize Power Consumption

Limit Comparison of All Monitored Values

APPLICATIONS

Notebook PCs, Network Servers and Personal Computers

Telecommunications Equipment