PRODUCT DESCRIPTION

The ADM1030 is an ACPI-compliant two-channel digital thermometer and under/over temperature alarm, for use in computers and thermal management systems. Optimized for the Pentium III, the higher 1rC accuracy offered allows systems designers to safely reduce temperature guardbanding and increase system performance. A Pulsewidth Modulated (PWM) Fan Control output controls the speed of a cooling fan by varying output duty cycle. Duty cycle values between 33–100 allow smooth control of the fan. The speed of the fan can be monitored via a TACH input for a fan with a tach output.

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 1OC Using Remote Diode

0.125OC Resolution on Remote Temperature Channel

Local Temperature Sensor with 0.25OC Resolution

Pulsewidth Modulation Fan Control (PWM)

Programmable PWM Frequency

Programmable PWM Duty Cycle

Tach Fan Speed Measurement

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

Programmable INT Output Pin

Configurable Offset for All Temperature Channels

3 V to 5.5 V Supply Range

Shutdown Mode to Minimize Power Consumption

APPLICATIONS

Notebook PCs, Network Servers and Personal Computers Telecommunications Equipment