The ADM1031 is an ACPI−compliant, three−channel 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 guard−banding and increase system performance.
   
Features
• Optimized for Pentium III
    ♦ Reduced Guard−banding 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 2−Wire Fans
    (Using Sense Resistor)
• 2−Wire 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 Pb−Free Device