Product details

Local sensor accuracy (max) 1.5 Operating temperature range (°C) -50 to 150 Supply voltage (min) (V) 1.5 Supply voltage (max) (V) 5.5 Supply current (max) (µA) 12 Interface type Analog output Sensor gain (mV/°C) -13.6, -10.9, -8.2, -5.5 Rating Automotive Features UL recognized
Local sensor accuracy (max) 1.5 Operating temperature range (°C) -50 to 150 Supply voltage (min) (V) 1.5 Supply voltage (max) (V) 5.5 Supply current (max) (µA) 12 Interface type Analog output Sensor gain (mV/°C) -13.6, -10.9, -8.2, -5.5 Rating Automotive Features UL recognized
SOT-SC70 (DCK) 5 4.2 mm² 2 x 2.1
  • 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
  • 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

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.

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.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Drop-in replacement with upgraded functionality to the compared device
LM94021 ACTIVE ±1.5°C Temperature Sensor with Multiple Gain Analog Output Options Industrial-grade version
LM94022-Q1 ACTIVE Automotive Grade, ±1.5°C Temperature Sensor with Multiple Gain and Class-AB Analog Output Equivalent pin-compatible version with higher output source current capability (50µA)
Pin-for-pin with same functionality to the compared device
LMT84-Q1 ACTIVE Automotive Grade, 1.5V-Capable,10 uA Analog Output Temperature Sensor Fixed sensor gain (-5.5 mV/°C) with lower accuracy (±2.7°C) and similar pinout
LMT85-Q1 ACTIVE Automotive Grade, 1.8V-Capable, 10 uA Analog Output Temperature Sensor Fixed sensor gain (-8.2 mV/°C) with lower accuracy (±2.7°C) and similar pinout
LMT86-Q1 ACTIVE Automotive Grade, 2.2V-Capable, 10 uA Analog Output Temperature Sensor Fixed sensor gain (-10.9 mV/°C) with lower accuracy (±2.7°C) and similar pinout
LMT87-Q1 ACTIVE Automotive ±2.7°C 2.7V to 5.5V analog output temperature sensor with -13.6 mV/°C gain Fixed sensor gain (-13.6 mV/°C) with lower accuracy (±2.7°C) and similar pinout

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 4
Type Title Date
* Data sheet LM94021/LM94021Q Multi-Gain Analog Temperature Sensor datasheet (Rev. E) 28 Jun 2013
Certificate UL Certificate of Compliance Vol1-Sec7 E232195 06 Aug 2018
More literature Die D/S LM94021 MDA Multi-Gain Analog Temp Sensor 28 Sep 2012
White paper Temperature sensor solutions for low-voltage systems 11 May 2005

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Calculation tool

LM94021-2QUICK-CALC — LM94021 and LM94022 Voltage-to-Temperature Transfer Function Table

Calculation tool

LM9403X-DESIGNAID-CALC — LM94021 LM94022 LM94023 Design Aid

Package Pins CAD symbols, footprints & 3D models
SOT-SC70 (DCK) 5 Ultra Librarian

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos