±1.5°C Temperature Sensor with Multiple Gain and Class-AB Analog Output
Product details
Parameters
Package | Pins | Size
Features
- LM94022/-Q1 is AEC-Q100 Grade 0 qualified and
is Manufactured on an Automotive Grade Flow - Low 1.5-V to 5.5-V Operation With Low 5.4-µA
Supply Current - Push-Pull Output With ±50-µA Source Current Capability
- Four Selectable Gains
- Very Accurate Over Wide Temperature Range of
−50°C to +150°C:- ±1.5ºC Temperature Accuracy for 20ºC to
40ºC Range - ±1.8ºC Temperature Accuracy for –50ºC to
70ºC Range - ±2.1ºC Temperature Accuracy for –50ºC to
90ºC Range - ±2.7ºC Temperature Accuracy for –50ºC to
150ºC Range
- ±1.5ºC Temperature Accuracy for 20ºC to
- Output is Short-Circuit Protected
- Extremely Small SC70 Package
- For the Similar Functionality in a TO-92 Package,
See LMT84, LMT85, LMT86, or LMT87 - Footprint Compatible With the Industry-Standard
LM20 Temperature Sensor
Description
The LM94022/-Q1 device is a precision analog output CMOS integrated-circuit temperature sensor with selectable linear negative temperature coefficient (NTC). A class-AB output structure gives the LM94022/-Q1 strong output source and sink current capability for driving heavy transient loads such as that presented by the input of a sample-and-hold analog-to-digital converter. The low 5.4-µA supply current and 1.5-V operating voltage of the LM94022/-Q1 make it ideal for battery-powered systems as well as general temperature-sensing applications.
The Gain Select 1 (GS1) and Gain Select 0 (GS0) logic inputs select one of four gains for the temperature-to-voltage output transfer function: −5.5 mV/°C, −8.2 mV/°C, −10.9 mV/°C, and −13.6 mV/°C. Selecting –5.5 mV/°C (GS1 and GS0 both tied low), allows the LM94022/-Q1 to operate down to 1.5-V supply while measuring temperature over the full range of −50°C to +150°C. Maximum temperature sensitivity, –13.6 mV/°C, is selected when GS1 and GS0 are both tied high. The gain-select inputs can be tied directly to VDD or Ground without any pullup or pulldown 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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LM94022/-Q1 1.5-V, SC70, Multi-Gain Analog Temperature Sensor With Class-AB Output datasheet (Rev. F) | Sep. 29, 2015 |
Technical article | How to choose the right thermistor for your temperature sensing application | Feb. 12, 2020 | |
Technical article | How to enable thermal safety for automotive infotainment and cluster systems | Oct. 15, 2019 | |
Technical article | Driving industrial innovation with small-size sensors | Sep. 12, 2019 | |
Technical article | How to select a temperature sensor probe | Feb. 18, 2016 | |
User guide | LM9402xEVM User's Guide | Sep. 12, 2013 | |
User guide | WEBENCH® Sensor Designer Thermocouple Sensor Ver 1 PCB (unpopulated) User Guide | Jan. 27, 2012 | |
User guide | LM94021 LM94022 LM94023 Design Aid (Rev. A) | Jan. 26, 2012 | |
White paper | 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
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
Reference designs
Design files
-
download Parallel Redundancy Protocol Ethernet for Substation Automation BOM.pdf (135KB) -
download Parallel Redundancy Protocol Ethernet for Substation Automation Assembly Drawing.pdf (1192KB) -
download Parallel Redundancy Protocol Ethernet for Substation Automation Layer Plots.pdf (1366KB) -
download Parallel Redundancy Protocol Ethernet for Substation Automation CAD Files.zip (3014KB)
Design files
-
download TIDA-00018 BOM.pdf (202KB) -
download TIDA-00018 PCB.pdf (645KB) -
download TIDA-00018 Altium.zip (3888KB) -
download TIDA-00018 Gerber.zip (319KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SC70 (DCK) | 5 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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