±3°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) -20 to 100 Supply voltage (Min) (V) 4 Supply voltage (Max) (V) 10 Supply current (Max) (uA) 120 Interface type Analog output Sensor gain (mV/Deg C) 10 Rating Catalog Features UL recognized 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

  • Calibrated Directly in ° Celsius (Centigrade)
  • Linear + 10.0 mV/°C Scale Factor
  • ±3°C Accuracy Guaranteed
  • Rated for Full −20° to +100°C Range
  • Suitable for Remote Applications
  • Low Cost Due to Wafer-Llevel Trimming
  • Operates from 4.0V to 10V
  • Less than 120 μA Current Drain
  • Low Self-Heating, 0.20°C in Still Air
  • Nonlinearity Only ±0.8°C Max Over Temp
  • Low Impedance Output, 20Ω for 1 mA Load
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Description

The LM45 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. The LM45 does not require any external calibration or trimming to provide accuracies of ±2°C at room temperature and ±3°C over a full −20 to +100°C temperature range. Low cost is assured by trimming and calibration at the wafer level. The LM45's low output impedance, linear output, and precise inherent calibration make interfacing to readout or control circuitry especially easy. It can be used with a single power supply, or with plus and minus supplies. As it draws only 120 μA from its supply, it has very low self-heating, less than 0.2°C in still air. The LM45 is rated to operate over a −20° to +100°C temperature range.

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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TMP235 ACTIVE ±1.2°C 2.3V to 5.5V analog output temperature sensor with -13.6 mV/°C gain This product has smaller package sizes, lower IQ (12uA), and supports a lower voltage supply (2.3V).

Technical documentation

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Type Title Date
* Datasheet LM45 SOT-23 Precision Centigrade Temperature Sensors datasheet (Rev. C) Feb. 19, 2013
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-Sec8 E232195 Aug. 06, 2018
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018
Application notes Tiny Temperature Sensors for Remote Systems Feb. 17, 2003

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