1 Features

• AEC-Q100 Qualified for automotive applications

– LM50-Q1 (Grade-1): –40°C to +125°C

– LM50HV-Q1 (Grade-0): –40°C to +150°C

• Functional safety-capable

– Documentation available to aid system design

• Industry-Standard Sensor Gain/Offset:

– 10mV/°C, 500mV at 0°C

• LM50HV-Q1 (Next-generation):

– Wide supply range: 3V to 36V

– ±2°C (Max) accuracy over 20°C to 70°C

– ±2.5°C (Max) accuracy over 0°C to 100°C

– ±3°C (Max) accuracy over −20°C to 125°C

– ±3.5°C (Max) accuracy over −40°C to 150°C

– Quiescent Current (Typ): 52μA

• LM50-Q1:

– Operating supply range: 4.5V to 10V

– ±3°C (Max) accuracy at 25°C

– ±4°C (Max) accuracy over −40°C to 125°C

– Quiescent Current (Typ): 95μA

• Available in Standard SOT23-3 package

• DC Output Impedance: 2kΩ/4kΩ (Typ/Max)

– Enables driving large capacitive loads

• UL Recognized Component (LM50-Q1)

2 Applications

• HEV/EV OBC & DC/DC converter

• Electronic power steering (EPS)

• Braking systems

• In-cabin sensing

• HVAC System

• Power Supply Modules

3 Description

The LM50-Q1 (Grade-1) and LM50HV-Q1 (Grade-0)

devices are AEC-Q100 automotive-grade analog

temperature sensor that can measure temperature

up to 125°C and 150°C, respectively, using a

single positive supply. Unlike NTC thermistors, LM50-

Q1 and LM50HV-Q1 do not require any external

calibration, trimming or software linearization leading

to simplifying the circuitry requirements. The output

voltage of the devices are 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 these devices ranges from

100mV (at -40°C) to 1.75V (at 125°C) and 2V (at

150°C only for LM50HV-Q1), simplifying automotive

ADC interfacing (including ADC integrated in MCU).

LM50HV-Q1 is designed for LDO-less application due

to stable functionality across wide supply range of

3V to 36V. Trimming and calibration of LM50-Q1 and

LM50HV-Q1 at the wafer level provide low cost and

consistent accuracy: LM50-Q1 (±4°C across –40°C

to 125°C) and LM50HV-Q1 (±3°C across –20°C to

125°C, ±3.5°C across –40°C to 150°C). Functional

safety documentation is also available.