TMP37:  Low Voltage Temperature Sensor Vo=500

The TMP35/TMP36/TMP37 are low voltage, precision centi-grade temperature sensors. They provide a voltage output that is linearly proportional to the Celsius (centigrade) temperature. The TMP35/ ...More

TMP37:  Low Voltage Temperature Sensor Vo=500

Product Description

The TMP35/TMP36/TMP37 are low voltage, precision centi-grade 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 maxi-mum. 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.

Data Sheet, Rev. E, 8/08

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

Diagrams

TMP37 Diagram
Functional Block Diagram for TMP37

Specifications

Output Type Analog
Sensor Output +20 mV/°C
Temp Res(°C/LSB) n/a
Supply Voltage Range +2.7V to +5.5V
Temp Range(s) +5 to +100

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