LM94023 ±1.5°C Temperature Sensor with Multiple Gain, Class-AB Analog Output and WCSP | TI.com

LM94023 (ACTIVE)

±1.5°C Temperature Sensor with Multiple Gain, Class-AB Analog Output and WCSP



The LM94023 is a precision analog output CMOS integrated-circuit temperature sensor that operates at a supply voltage as low as 1.5 Volts. Available in the very small four-bump DSBGA 0.8mm x 0.8mm) the LM94023 occupies very little board area. A class-AB output structure gives the LM94023 strong output source and sink current capability for driving heavy loads, making it well suited to source the input of a sample-and-hold analog-to-digital converter with its transient load requirements, This generally means the LM94023 can be used without external components, like resistors and buffers, on the output. While operating over the wide temperature range of −50°C to +150°C, the LM94023 delivers an output voltage that is inversely porportional to measured temperature. The LM94023's low supply current makes it ideal for battery-powered systems as well as general temperature sensing applications.

A Gain Select (GS) pin sets the gain of the temperature-to-voltage output transfer function. Either of two slopes are selectable: −5.5 mV/°C (GS=0) or −8.2 mV/°C (GS=1). In the lowest gain configuration, the LM94023 can operate with a 1.5V supply while measuring temperature over the full −50°C to +150°C operating range. Tying GS high causes the transfer function to have the largest gain 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.


  • Low 1.5V Operation
  • Push-pull Output with 50µA Source Current Capability
  • Two Selectable Gains
  • Very Accurate Over Wide Temperature Range of −50°C to +150°C
  • Low Quiescent Current
  • Output is Short-circuit Protected
  • Extremely Small DSBGA Package
  • Footprint Compatible with the Industry-standard LM20 Temperature Sensor

Key Specifications

  • Supply Voltage 1.5V to 5.5V
  • Supply Current 5.4 µA (typ)
  • Output Drive ±50 µA
  • Temperature Accuracy
    • 20°C to 40°C ±1.5°C
    • –50°C to 70°C ±1.8°C
    • –50°C to 90°C ±2.1°C
    • –50°C to 150°C ±2.7°C
  • Operating Temperature −50°C to 150°C


Compare all products in Analog temperature sensors Email Download to Excel
Part number Order 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 Output impedance (ohms) Interface
LM94023 Order now 1.5     -50 to 150     1.5     5.5     8.1     -5.5 or -8.2     Catalog     Selectable gain setting     4.4     Analog Output    
LM20 Order now 1.5     -40 to 125
-55 to 130    
2.4     5.5     7     -11.7     Catalog     Industry standard pinout
UL Recognized    
160     Analog Output    
LM94021 Order now 1.5     -50 to 150     1.5     5.5     12     -5.5 to -13.6     Catalog     UL Recognized     8     Analog Output    
LM94022 Order now 1.5     -50 to 150     1.5     5.5     8.1     -5.5 to -13.6     Catalog     Selectable gain setting
UL Recognized    
5.2     Analog Output    
LMT84 Order now 2.7     -50 to 150     1.5     5.5     8.1     -5.5     Catalog     Industry standard pinout       Analog Output