Product details

Local sensor accuracy (max) 2, 3 Operating temperature range (°C) -40 to 150 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 Catalog Features UL recognized
Local sensor accuracy (max) 2, 3 Operating temperature range (°C) -40 to 150 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 Catalog Features UL recognized
SOT-23 (DBZ) 3 6.9204 mm² 2.92 x 2.37
  • LM50-Q1 is AEC-Q100 Grade 1 Qualified and is Manufactured on an Automotive Grade Flow
  • Calibrated Directly in Degrees Celsius (Centigrade)
  • Linear + 10 mV/°C Scale Factor
  • ±2°C Accuracy Specified at 25°C
  • Specified for Full –40° to 125°C range
  • Suitable for Remote Applications
  • Low Cost Due to Wafer-Level Trimming
  • Operates from 4.5 V to 10 V
  • Less than 130-µA Current Drain
  • Low Self-Heating: Less than 0.2°C in Still A
  • Nonlinearity Less than 0.8°C Over Temp
  • UL Recognized Component
  • LM50-Q1 is AEC-Q100 Grade 1 Qualified and is Manufactured on an Automotive Grade Flow
  • Calibrated Directly in Degrees Celsius (Centigrade)
  • Linear + 10 mV/°C Scale Factor
  • ±2°C Accuracy Specified at 25°C
  • Specified for Full –40° to 125°C range
  • Suitable for Remote Applications
  • Low Cost Due to Wafer-Level Trimming
  • Operates from 4.5 V to 10 V
  • Less than 130-µA Current Drain
  • Low Self-Heating: Less than 0.2°C in Still A
  • Nonlinearity Less than 0.8°C Over Temp
  • UL Recognized Component

The LM50 and LM50-Q1 devices are precision integrated-circuit temperature sensors that can sense a –40°C to 125°C temperature range using a single positive supply. The output voltage of the device is linearly proportional to 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 or LM50-Q1 ranges from 100 mV to 1.75 V for a –40°C to 125°C temperature range. The LM50 and LM50-Q1 do 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 and LM50-Q1 at the wafer level assure low cost and high accuracy. The linear output, 500 mV offset, and factory calibration of the LM50 and LM50-Q1 simplify the circuitry requirements in a single supply environment where reading negative temperatures is necessary. Because the quiescent current of the LM50 and LM50-Q1 is less than 130 µA, self-heating is limited to a very low 0.2°C in still air.

The LM50 and LM50-Q1 devices are precision integrated-circuit temperature sensors that can sense a –40°C to 125°C temperature range using a single positive supply. The output voltage of the device is linearly proportional to 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 or LM50-Q1 ranges from 100 mV to 1.75 V for a –40°C to 125°C temperature range. The LM50 and LM50-Q1 do 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 and LM50-Q1 at the wafer level assure low cost and high accuracy. The linear output, 500 mV offset, and factory calibration of the LM50 and LM50-Q1 simplify the circuitry requirements in a single supply environment where reading negative temperatures is necessary. Because the quiescent current of the LM50 and LM50-Q1 is less than 130 µA, self-heating is limited to a very low 0.2°C in still air.

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Technical documentation

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Type Title Date
* Data sheet LM50 and LM50-Q1 SOT-23 Single-Supply Centigrade Temperature Sensor datasheet (Rev. G) PDF | HTML 20 Jan 2017
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
Certificate UL Certificate of Compliance Vol1-Sec5 E232195 06 Aug 2018
Application note Tiny Temperature Sensors for Remote Systems 17 Feb 2003

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Reference designs

PMP10260 — 24Vdc Input (Double Car Battery) Automotive Multiphase Sync-Buck Reference Design

This high-efficiency, high-power reference design uses the LM5119 two-phase synchronous-buck controller to regulate 14.4V at 60A. This design can be used to supply single car battery power from a double battery system, often found in trucks. Features include input EMI filtering, output hot swap (...)
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SOT-23 (DBZ) 3 Ultra Librarian

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