LM94021 ±1.5°C Temperature Sensor with Multiple Gain Analog Output Options | TI.com

LM94021 (ACTIVE)

±1.5°C Temperature Sensor with Multiple Gain Analog Output Options



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

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Parametrics Compare all products in Analog temperature sensors

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)
Output impedance (ohms)
LM94021 LM20 LM94022 LM94023 LMT84
1.5     1.5     1.5     1.5     2.7    
-50 to 150     -40 to 125
-55 to 130    
-50 to 150     -50 to 150     -50 to 150    
1.5     2.4     1.5     1.5     1.5    
5.5     5.5     5.5     5.5     5.5    
12     7     8.1     8.1     8.1    
-5.5 to -13.6     -11.7     -5.5 to -13.6     -5.5 or -8.2     -5.5    
Catalog     Catalog     Catalog     Catalog     Catalog    
UL Recognized     Industry standard pinout
UL Recognized    
Selectable gain setting
UL Recognized    
Selectable gain setting     Industry standard pinout    
8     160     5.2     4.4      
Analog Output     Analog Output     Analog Output     Analog Output     Analog Output