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LM50-Q1

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Automotive ±3°C analog output temperature sensor with 10mV/°C gain

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Data sheet

LM50-Q1

ACTIVE
Data sheet Order now

Product details

Local sensor accuracy (max) 3 Operating temperature range (°C) -40 to 125 Supply voltage (min) (V) 4.5 Supply voltage (max) (V) 10 Supply current (max) (µA) 130 Interface type Analog output Sensor gain (mV/°C) 10 Rating Automotive Features Industry standard pinout, UL recognized TI functional safety category Functional Safety-Capable
Local sensor accuracy (max) 3 Operating temperature range (°C) -40 to 125 Supply voltage (min) (V) 4.5 Supply voltage (max) (V) 10 Supply current (max) (µA) 130 Interface type Analog output Sensor gain (mV/°C) 10 Rating Automotive Features Industry standard pinout, UL recognized TI functional safety category Functional Safety-Capable
SOT-23 (DBZ) 3 6.9204 mm² 2.92 x 2.37
  • 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
  • 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
  • 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
  • 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

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.

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.
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Technical documentation

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Type Title Date
* Data sheet LM50-Q1 Automotive (Grade 1), ±3°C Accurate, Analog Centigrade (10mV/°C) Temperature Sensor in SOT-23 Package datasheet PDF | HTML 20 May 2025
EVM User's guide LM50HV Evaluation Module User's Guide PDF | HTML 12 Sep 2025
Functional safety information LM50-Q1 Functional Safety User's Guide 17 Feb 2020
Certificate UL Certificate of Compliance Vol1-Sec5 E232195 06 Aug 2018

Design & development

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Evaluation board

LM50HVEVM — LM50 high-voltage evaluation module

The LM50HV evaluation module (EVM) features a single-pole-double-throw (SPDT) switch that allows users to connect a power supply through test points. The LM50HVEVM uses a MSP430F5528 microcontroller along with a USB interface to enable users to datalog results and interface with the LM50HV analog (...)
User guide: PDF | HTML
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SOT-23 (DBZ) 3 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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