Positive +10.0mV/°C Gain Analog Output Temperature Sensor

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Product details

Parameters

Local sensor accuracy (Max) (+/- C) 4 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 Catalog Features Industry standard pinout 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

  • Cost-Effective Alternative to Thermistors
  • Calibrated Directly in Degree Celsius (Centigrade)
  • Linear + 10.0 mV/°C Scale Factor
  • ±3°C Accuracy Guaranteed at 25°C
  • Specified for Full −40° to 125°C range
  • Suitable for Remote Applications
  • Operates from 4.5 V to 10 V
  • Less than 130-µA Current Drain
  • Low Self-heating, Less Than 0.2°C in Still Air
  • Non-linearity Less Than 0.8°C Over Temp
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Description

The LMT90 device is a precision integrated-circuit temperature sensor that can sense a −40°C to +125°C temperature range using a single positive supply. The output voltage of LMT90 is linearly proportional to Celsius (Centigrade) 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 LMT90 ranges from 100 mV to 1.75 V for a −40°C to 125°C temperature range. The LMT90 does 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 LMT90 at the wafer level assure low cost and high accuracy. The linear output, 500-mV offset, and factory calibration of LMT90 simplify circuitry required in a single-supply environment where reading negative temperatures is required. The LMT90’s quiescent current is less than 130 µA, thus self-heating is limited to a very low 0.2°C in still air.

The LMT90 is a cost-competitive alternative to thermistors.

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Technical documentation

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Type Title Date
* Data sheet LMT90 SOT-23 Single-Supply Centigrade Temperature Sensor datasheet (Rev. B) Sep. 29, 2015
Technical article How to choose the right thermistor for your temperature sensing application Feb. 13, 2020
Technical article How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical article Driving industrial innovation with small-size sensors Sep. 12, 2019
Application note SC Temp Sensors Challenge Precision RTDs and Thermistors in Build Automation (Rev. A) May 08, 2019
Technical article How to select a temperature sensor probe Feb. 18, 2016
More literature Analog Temperature Sensors Apr. 18, 2013
User guide LMT90 User Guide Jan. 31, 2013

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description

The Texas Instruments LMT90EVM evaluation module (EVM) helps designers evaluate the operation and performance of the LMT90 analog temperature sensor.

Features
  • Evaluation board for variety of analog temperature sensor products
  • The board is user-friendly and has access to the temp sensor output pins
  • CAD/CAE symbols

    Package Pins Download
    SOT-23 (DBZ) 3 View options

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