LM50-Q1

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Automotive grade, ±2°C analog output temperature sensor, with 10mV/°C gain

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Product details

Parameters

Local sensor accuracy (Max) (+/- C) 2 Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 4.5 Supply voltage (Max) (V) 10 Supply current (Max) (uA) 130 Interface type Analog output Sensor gain (mV/Deg C) 10 Rating Automotive Features UL recognized TI functional safety category Functional Safety-Capable open-in-new Find other Analog temperature sensors

Package | Pins | Size

SOT-23 (DBZ) 3 7 mm² 2.92 x 2.37 open-in-new Find other Analog temperature sensors

Features

  • 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
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Description

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
* Datasheet LM50 and LM50-Q1 SOT-23 Single-Supply Centigrade Temperature Sensor datasheet (Rev. G) Jan. 20, 2017
Functional safety information LM50-Q1 Functional Safety User's Guide Feb. 17, 2020
Technical articles How to choose the right thermistor for your temperature sensing application Feb. 12, 2020
Technical articles How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical articles Driving industrial innovation with small-size sensors Sep. 12, 2019
More literature UL Certificate of Compliance Vol1-Sec5 E232195 Aug. 06, 2018
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018

Design & development

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SOT-23 (DBZ) 3 View options

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