Product Introduction

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° 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 reads temperatures from 10°C to 

125°C. The TMP36 is specified from −40°C to +125°C, provides a 750 mV output at 25°C, and operates to 125°C from a single 2.7 V supply. The 

TMP36 is functionally compatible with the LM50. Both the TMP35 and TMP36 have an output scale factor of 10 mV/°C.

The TMP37 is intended for applications over the range of 5°C to 100°C and provides an output scale factor of 20 mV/°C. The TMP37 provides a 

500 mV output at 25°C. Operation extends to 150°C with reduced accuracy for all devices when operating from a 5 V supply.

The TMP35/TMP36/TMP37 are available in low cost 3-lead TO-92, 8-lead SOIC_N, and 5-lead SOT-23 surface-mount packages.

Product 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

Product Applications

• Environmental control systems

• Thermal protection

• Industrial process control

• Fire alarms

• Power system monitors

• CPU thermal management

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