LM94021 Multi-Gain Analog Temperature Sensor | TIJ.co.jp

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Multi-Gain Analog Temperature Sensor



The LM94021 is a precision analog output CMOS integrated-circuit temperature sensor that operates at a supply voltage as low as 1.5V. While operating over the wide temperature range of −50°C to +150°C, the LM94021 delivers an output voltage that is inversely proportional to measured temperature. The LM94021's low supply current makes it ideal for battery-powered systems as well as general temperature sensing applications.

Two logic inputs, Gain Select 1 (GS1) and Gain Select 0 (GS0), select the gain of the temperature-to-voltage output transfer function. Four slopes are selectable: −5.5 mV/°C, −8.2 mV/°C, −10.9 mV/°C, and −13.6 mV/°C. In the lowest gain configuration (GS1 and GS0 both tied low), the LM94021 can operate with a 1.5V supply while measuring temperature over the full −50°C to +150°C operating range. Tying both inputs high causes the transfer function to have the largest gain of −13.6 mV/°C for maximum temperature sensitivity. The gain-select inputs can be tied directly to VDD or Ground without any pull-up or pull-down resistors, reducing component count and board area. These inputs can also be driven by logic signals allowing the system to optimize the gain during operation or system diagnostics.


  • LM94021Q is AEC-Q100 Grade 0 qualified and is manufactured on an Automotive grade Flow
  • Low 1.5V operation
  • Four selectable gains
  • Very accurate over wide temperature range of −50°C to +150°C
  • Low quiescent current
  • Output is short-circuit protected
  • Extremely small SC70 package
  • Footprint compatible with the industry-standard LM20 temperature sensor
  • UL Recognized Component

  • Key Specifications

    Supply Voltage 1.5V to 5.5V
    Supply Current 9 μA (typ)
    Temperature Accuracy 20°C to 40°C −50°C to 70°C −50°C to 90°C −50°C to 150°C ±1.5°C ±1.8°C ±2.1°C ±2.7°C
    Operating Temperature −50°C to 150°C


    他の製品と比較 アナログ温度センサ メール Excelへダウンロード
    Part number オーダー・オプション Local sensor accuracy (Max) (+/- C) Operating temperature range (C) Supply voltage (Min) (V) Supply voltage (Max) (V) Supply current (Max) (uA) Sensor gain (mV/Deg C) Rating Features Interface
    LM94021 ご注文 1.5     -50 to 150     1.5     5.5     12     -5.5 to -13.6     Catalog     UL recognized     Analog Output    
    LM20 ご注文 1.5     -40 to 125
    -55 to 130    
    2.4     5.5     7     -11.7     Catalog     Industry standard pinout
    UL recognized    
    Analog Output    
    LM94022 ご注文 1.5     -50 to 150     1.5     5.5     8.1     -5.5 to -13.6     Catalog     Selectable gain setting
    UL recognized    
    Analog Output    
    LM94023 ご注文 1.5     -50 to 150     1.5     5.5     8.1     -5.5 or -8.2     Catalog     Selectable gain setting     Analog Output    
    LMT84 ご注文 2.7     -50 to 150     1.5     5.5     8.1     -5.5     Catalog     Industry standard pinout     Analog Output