ADM1021A
ADM1021A is Low Cost Microprocessor System Temperature Monitor Microcomputer manufactured by onsemi.
Low Cost Microprocessor
System Temperature
Monitor Microputer
The ADM1021A is a two-channel digital thermometer and under/overtemperature alarm, intended for use in personal puters and other systems requiring thermal monitoring and management. The device can measure the temperature of a microprocessor using a diode-connected PNP transistor, which can be provided on-chip with the Pentium III or similar processors, or can be a low cost discrete NPN/PNP device, such as the 2N3904/2N3906. A novel measurement technique cancels out the absolute value of the transistor’s base emitter voltage so that no calibration is required. The second measurement channel measures the output of...
