National Semiconductor is one of the world leading analog component suppliers who offers high-performance, low power and high accuracy analog and mixed-signal solutions.

Increased electronic content in consumer, critical automotive and industrial applications are driving the need for specialized high temperature thermal management solutions. National's analog and digital output temperature sensors, feature TruTherm® technology, provide high accuracy at the critical high temperature area and operate in extended temperature range.

 LM50 - SOT-23 Single-Supply Centigrade Temperature Sensor

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.