FEATURES
Temperature Sensor Includes 100 Ω Heater Heater Provides Power IC Emulation Accuracy ؎ 3°C 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 µ A Quiescent Current (Heater OFF) Minimal External Components APPLICATIONS
System Airflow Sensor Equipment Over-Temperature Sensor Over-Temperature Protection Power Supply Thermal Sensor Low-Cost Fan Controller Airflow and Temperature Sensor TMP12* FUNCTIONAL BLOCK DIAGRAM HYSTERESIS CURRENT CURRENT MIRROR IHYS VREF V+ SET HIGH WINDOW COMPARATOR + + - OVER SET LOW VOLTAGE REFERENCE AND SENSOR 1kΩ UNDER HYSTERESIS VOLTAGE GND PINOUTS DIP And SO VREF 1 2 3 4 TOP VIEW (Not to Scale) GENERAL DESCRIPTION
SET HIGH SET LOW GND Fan cooling may be required continuously, or during peak power demands, e.g. The TMP12 generates an internal voltage that is linearly proportional to Celsius (Centigrade) temperature, nominally ؉5 mV/°C.
Analog Devices
