Analog Devices Inc. TMP35/TMP36/TMP37 Low Voltage Temperature Sensors
Analog Devices TMP35/TMP36/TMP37 Low Voltage Temperature Sensors provide a voltage output that is linearly proportional to the Celsius (centigrade) temperature. The TMP35/TMP36/TMP37 does 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, its linear output, and precise calibration simplify interfacing to temperature control circuitry and ADCs. All three devices are intended for single-supply operation from 2.7V to 5.5V maximum. The supply current runs well below 50µA, 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 0.5µA.
Features
- Low voltage operation (2.7V to 5.5V)
- Calibrated directly in °C
- 10mV/°C scale factor (20mV/°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 50µA quiescent current
- Shutdown current 0.5µA 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
Functional Block Diagram
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