LM50  Product Folder

The LM50 is a precision integrated-circuit temperature sensor that can sense a -40°C to +125°C temperature range using a single positive supply. The LM50's output voltage is linearly proportional to Celsius (Centigrade) temperature (+10 mV/°C) and has a DC offset of +500 mV. The offset allows reading negative temperatures without the need for a negative supply. The ideal output voltage of the LM50 ranges from +100 mV to +1.75V for a -40°C to +125°C temperature range. The LM50 does not require any external calibration or trimming to provide accuracies of ±3°C at room temperature and ±4°C over the full -40°C to +125°C temperature range. Trimming and calibration of the LM50 at the wafer level assure low cost and high accuracy. The LM50's linear output, +500 mV offset, and factory calibration simplify circuitry required in a single supply environment where reading negative temperatures is required. Because the LM50's quiescent current is less than 130 µA, self-heating is limited to a very low 0.2°C in still air.

• Calibrated directly in degree Celsius (Centigrade)
• Linear + 10.0 mV/°C scale factor
• ±2°C accuracy guaranteed at +25°C
• Specified for full -40° to +125°C range
• Suitable for remote applications
• Low cost due to wafer-level trimming
• Operates from 4.5V to 10V
• Less than 130 µA current drain
• Low self-heating, less than 0.2°C in still air
• Nonlinearity less than 0.8°C over temp

• Computers
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• Portable Medical Instruments
• HVAC
• Power Supply Modules