The ADM1031 is an ACPIâcompliant, threeâchannel digital thermometer and under/overtemperature alarm for use in personal computers and thermal management systems. Optimized for the PentiumIII, the part offers a 1°C higher accuracy, which allows system designers to safely reduce temperature guardâbanding and increase system performance.
Features
⢠Optimized for Pentium III
⦠Reduced Guardâbanding Software
⦠Automatic Fan Speed Control, Independent of CPU
Intervention After Initial Setup
⢠0.125°C Resolution on External Temperature Channels
⢠Control Loop to Minimal Acoustic Noise and Battery
Consumption
⢠Remote Temperature Measurement Accurate to 1°C
Using Remote Diode (Two Channels)
⢠Local Sensor with 0.25°C Resolution
⢠Pulse Width Modulation (PWM) Fan Control for 2 Fans
⢠Programmable PWM Frequency and PWM Duty Cycle
⢠Tach Fan Speed Measurement (Two Channels)
⢠Analog Input to Measure Fan Speed of 2âWire Fans
(Using Sense Resistor)
⢠2âWire System Management Bus (SMBus) with ARA
Support
Applications
⢠Notebook PCs, Network Servers, and Personal Computers
⢠Telecommunications Equipment
⢠Overtemperature THERM Output Pin for CPU
Throttling
⢠Programmable INT Output Pin
⢠Configurable Offsets for Temperature Channels 3.0 V
to 5.5 V Supply Range
⢠Shutdown Mode to Minimize Power Consumption
⢠Limit Comparison of All Monitored Values
⢠This is a PbâFree Device
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