LM94021

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

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Product details

Parameters

Local sensor accuracy (Max) (+/- C) 1.5 Operating temperature range (C) -50 to 150 Supply voltage (Min) (V) 1.5 Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 12 Interface type Analog output Sensor gain (mV/Deg C) -5.5 to -13.6 Rating Catalog Features UL recognized open-in-new Find other Analog temperature sensors

Package | Pins | Size

SOT-SC70 (DCK) 5 4 mm² 2 x 2.1 open-in-new Find other Analog temperature sensors

Features

  • 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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Description

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.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 9
Type Title Date
* Datasheet LM94021/LM94021Q Multi-Gain Analog Temperature Sensor datasheet (Rev. E) Jun. 28, 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-Sec7 E232195 Aug. 06, 2018
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018
User guides LM9402xEVM User's Guide Sep. 12, 2013
User guides LM94021 LM94022 LM94023 Design Aid (Rev. A) Jan. 26, 2012
White papers Temperature sensor solutions for low-voltage systems May 11, 2005

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
89
Description

The Texas Instruments LM9402xEVM evaluation module helps designers evaluate the operation and performance of the LM94021, LM94022, and LM94023 analog temperature sensors.

Features
  • Evaluation board for variety of analog temperature sensor products
  • The board is user-friendly, and has access to the temp sensor output pins

Design tools & simulation

CALCULATION TOOLS Download
CALCULATION TOOLS Download
LM94021 LM94022 LM94023 Design Aid
LM9403X-DESIGNAID-CALC
document-generic User guide

CAD/CAE symbols

Package Pins Download
SC70 (DCK) 5 View options

Ordering & quality

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