1 Features
• Industry-Standard Sensor Gain/Offset:
– 10mV/°C, 500mV at 0°C
• LM50B Temperature Accuracy:
– ±2°C (Max) at 25°C
– ±3°C (Max) over temperature range
• LM50C Temperature Accuracy:
– ±3°C (Max) at 25°C
– ±4°C (Max) over temperature range
• Operating supply range: 4.5V to 10V
• Quiescent Current (Typ): 95μA
• Available in Standard SOT23-3 package
• Nonlinearity: ±0.8°C (Max)
• DC Output Impedance: 2kΩ/4kΩ (typ/Max)
– Enables driving large capacitive loads
• UL Recognized Component

2 Applications
• Mobile phones, PC & notebooks
• Data storage
• Battery Management
• Home and Multifunction printers
• Medical and healthcare Instruments
• HVAC System
• Power Supply Modules

3 Description
The LM50 device is a precision analog temperature
sensor that can measure temperatures from -40°C
to 125°C using a single positive supply. The output
voltage of the device is linearly proportional to
temperature (10mV/°C) and has a DC offset of
500mV at 0°C. The offset allows reading negative
temperatures without the need for a negative supply.
The output voltage of the LM50 ranges from 100mV
(at –40°C) to 1.75V (at 125°C), simplifying analog-todigital
converter (ADC) interfacing.
Unlike NTC thermistors, LM50 does not require any
external calibration, trimming or software linearization
leading to simplifying the circuitry requirements in
a single supply environment. Due to low quiescent
current of LM50 (typically around 95μA), self-heating
is limited to a very low 0.2°C (in still air) and the
device is designed for remote or battery-powered
applications. Trimming and calibration of the LM50 at
the wafer level provide long-term availability, low cost
and consistent accuracy in two grades: LM50B (±2°C
at 25°C, ±3°C over temperature range) and LM50C
(±3°C at 25°C, ±4°C over temperature range).