Temperature Sensor for Wearable Devices Reference Design


Design files


This reference design demonstrates temperature sensing aimed at the wearables market. LMT70 temperature sensor is ideal for wearable devices due to its 0.13°C temperature accuracy at human body temperatures. Its small form WCSP package allows it to be heated up quickly and have a fast thermal response time when placed on a human body.

  • USB form-factor PCB board with breakout tabs to attach different substrates
  • Design guide includes thermal response of different substrates and MSP430F5528 ADC calibration techniques
  • Tested and includes firmware, GUI, user guides and test report
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU802.PDF (933 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRD23.PDF (142 K)

Detailed schematic diagram for design layout and components

TIDRD24.PDF (180 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRD25.PDF (102 K)

Detailed overview of design layout for component placement

TIDRD26.PDF (628 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Analog temperature sensors

LMT700.1C analog temperature sensor, -5.19 mV/C, high-precision matched pairs, output enable pin

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F552825 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report TIDA-00452 Test Results Feb. 25, 2015

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