GENERAL DESCRIPTION
The TMP12 is a silicon-based airflow and temperature sensor designed to be placed in the same airstream as heat generating components that require cooling. Fan cooling may be required continuously or during peak power demands. For example, if the cooling systems of a power supply fails, system reliability and/or safety may be impaired. By monitoring temperature while emulating a power IC, the TMP12 can provide a warning of cooling system failure.

FEATURES
   Temperature Sensor Includes 100 Ω Heater
   Heater Provides Power IC Emulation
   Accuracy 3 Typ from –40°C to +100°C
   Operation to 150°C
   5 mV/°C Internal Scale Factor
   Resistor Programmable Temperature Setpoints
   20 mA Open-Collector Setpoint Outputs
   Programmable Thermal Hysteresis
   Internal 2.5 V Reference
   Single 5 V Operation
   400  μA Quiescent Current (Heater Off)
   Minimal External Components

APPLICATIONS
   System Airflow Sensor
   Equipment Overtemperature Sensor
   Overtemperature Protection
   Power Supply Thermal Sensor
   Low Cost Fan Controller