1 Features
• AEC-Q100 Qualified for automotive applications
– LM50-Q1 (Grade-1): –40°C to +125°C
operating temperature
– Device HBM ESD classification level 2
• Functional safety-capable
– Documentation available to aid functional safety
system design
• Industry-Standard Sensor Gain/Offset:
– 10mV/°C, 500mV at 0°C
• LM50-Q1 Temperature Accuracy:
– ±3°C (Max) at 25°C
– ±4°C (Max) over −40°C to 125°C
• 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
• Automotive
• HEV/EV OBC & DC/DC converter
• Electronic power steering (EPS)
• Head unit & digital cockpit
• Braking systems
• In-cabin sensing
• HVAC System
• Power Supply Modules

3 Description
The LM50-Q1 device is an automotive-grade analog
temperature sensor (AEC-Q100 Grade 1 qualified)
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-Q1 ranges from 100mV (at –40°C) to 1.75V
(at 125°C), simplifying automotive ADC interfacing
(including ADC integrated in MCU).
Unlike NTC thermistors, LM50-Q1 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-Q1 (typically around
95μA), self-heating is limited to a very low 0.2°C
(in still air) and the device is ideal for automotive
applications such as ECUs. Trimming and calibration
of LM50-Q1 at the wafer level verify low cost and
consistent accuracy: (±3°C at 25°C, ±4°C across
–40°C to 125°C). Functional safety documentation
is also available for systems requiring enhanced
reliability.