TMP37

Data Sheet Low Voltage Temperature Sensors TMP35/TMP36/TMP37 FEATURES Low voltage operation (2.7 V to 5.5 V) Calibrated directly in °C 10 mV/°C scale factor (20 mV/°C on TMP37) ±2°C accuracy over temperature (typ) ±0.5°C linearity (typ) Stable with large capacitive loads Specified −40°C to +125°C, operation to +150°C Less than 50 µA quiescent current Shutdown current 0.5 µA max Low self-heating Qualified for automotive applications APPLICATIONS Environmental control systems Thermal protection Industrial process control Fire alarms Power system monitors CPU thermal management GENERAL DESCRIPTION The TMP35/TMP36/TMP37 are low voltage, precision centigrade temperature sensors. They provide a voltage output that is linearly proportional to the Celsius (centigrade) temperature. The TMP35/TMP36/TMP37 do not require any external calibration to provide typical accuracies of ±1°C at +25°C and ±2°C over the −40°C to +125°C temperature range. The low output impedance of the TMP35/TMP36/TMP37 and its linear output and precise calibration simplify interfacing to temperature control circuitry and ADCs. All three devices are intended for single-supply operation from 2.7 V to 5.5 V maximum. The supply current runs well below 50 µA, providing very low self-heating—less than 0.1°C in still air. In addition, a shutdown function is provided to cut the supply current to less than 0.5 µA. The TMP35 is functionally compatible with the LM35/LM45 and provides a 250 mV output at 25°C. The TMP35 read...