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