The ADM1032 is a dual-channel digital thermometer and under/overtemperature alarm intended for use in PCs and thermal management systems. The device can measure the temperature of a remote thermal diode, which can be located on the processor die or can be a discrete device (2N3904/06), accurate to 1°C. A novel measurement technique cancels out the absolute value of the transistor’s base emitter voltage so that no calibration is required. The ADM1032 also measures its ambient temperature.

Features

? On-chip and Remote Temperature Sensing

? Offset Registers for System Calibration

? 0.125°C Resolution/1°C Accuracy on Remote Channel

? 1°C Resolution/3°C Accuracy on Local Channel

? Fast (Up to 64 Measurements Per Second)

? 2-wire SMBus Serial Interface

? Supports SMBus Alert

? Programmable Under/Overtemperature Limits

? Programmable Fault Queue

? Overtemperature Fail-safe THERM Output

? Programmable THERM Limits

? Programmable THERM Hysteresis

? 170 μA Operating Current

? 5.5 μA Standby Current

? 3.0 V to 5.5 V Supply

? Small 8-lead SOIC and MSOP Packages

? These are Pb-Free Devices*

Applications

? Desktop and Notebook Computers

? Smart Batteries

? Industrial Controllers

? Telecommunications Equipment

? Instrumentation

? Embedded Systems