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TIDA-00824

Human Skin Temperature Sensing for Wearable Applications Reference Design

Design files

TIDA-00824

Design files

Overview

TIDA-00824 features LMT70 analog temperature sensor for measuring human skin temperature. This reference design shows how to mechanically mount the temperature sensor for best thermal conductivity. Signal path considerations on how to achieve greater than 0.1°C accuracy is also discussed in this design.

Features
  • How to use LMT70 temperature sensor to measure human skin temperature
  • Ideal signal path components to achieve high thermal accuracy
  • Layout considerations for routing thermal paths
  • Mechanical case example for ideal mounting considerations
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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.

download Design guide — TIDA-00824
TIDUAY7.PDF (1731 K)

Reference design overview and verified performance test data

download Schematic — TIDA-00824
TIDRIG2.ZIP (189 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-00824
TIDRIG3.PDF (196 K)

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

download Assembly drawing — TIDA-00824
TIDRIG4.ZIP (73 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — TIDA-00824
TIDRIG6.ZIP (518 K)

Files used for 3D models or 2D drawings of IC components

download Gerber file — TIDA-00824
TIDCBA9.ZIP (3370 K)

Design file that contains information on physical board layer of design PCB

download PCB layout — TIDA-00824
TIDRIG5.ZIP (305 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Analog temperature sensors

LMT70 — 0.1C analog temperature sensor, -5.19 mV/C, high-precision matched pairs, output enable pin

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430G2553 — 16 MHz MCU with 16KB Flash, 512B SRAM, comparator, UART/SPI/I2C, timer

Data sheet: PDF
Precision ADCs

ADS1115 — 16-bit, 860-SPS, 4-channel, delta-sigma ADC with PGA, oscillator, VREF, comparator and I2C

Data sheet: PDF | HTML

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Software

Technical documentation

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Type Title Date
* Design guide TIDA-00824 Test Results Oct. 21, 2015

Related design resources

Reference designs

REFERENCE DESIGN
TIDA-00452 — Temperature Sensor for Wearable Devices Reference Design

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