TIDA-00972

±2% Accurate Humidity Sensing Reference Design Supporting Robust 2m Wire Communication

TIDA-00972

Design files

Overview

The TIDA-00972 reference design provides a sensor module level solution for +/- 2% of accuracy and reliable Relative Humidity (RH) and +/- 0.2 °C accuracy temperature sensing. The sensor module utilizes TI’s digital humidity and temperature sensor HDC1080 together with integrated communication bus buffer TCA9517 to provide high accuracy sensing result with robust communication over meters of wiring distance.

The reference design addresses the key considerations during development and manufacturing of the sensor module with test results.

Features
  • Relative humidity accuracy ±2%, temperature accuracy ±0.2°C
  • Small form factor of PCB size 15.7 mm x 7.6 mm
  • Very low power consumption during operation and when idle: 1.2uA without I2C buffer. Supply cut during idle.
  • Supports long-cable I2C communication over common wire (AWG24 with 2 meter length)
  • Supports both 5V and 3.3V power supply
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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.

TIDUBL7A.PDF (6475 KB)

Reference design overview and verified performance test data

TIDRMH6.PDF (64 KB)

Detailed overview of design layout for component placement

TIDRMH5.PDF (170 KB)

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

TIDRMH8.ZIP (175 KB)

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

TIDCCC5.ZIP (166 KB)

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

TIDRMH7.PDF (240 KB)

PCB layer plot file used for generating PCB design layout

TIDRMH4.PDF (156 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

I2C & I3C level shifters, buffers & hubs

TCA95172-bit level-translating 400-kHz I2C/SMBus buffer/repeater with powered-off high-impedance

Data sheet: PDF | HTML
Humidity sensors

HDC10802% RH low-power digital relative humidity sensor

Data sheet: PDF | HTML

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Software

Firmware

TIDCCC6 — TIDA-00972 Firmware

Supported products & hardware

Supported products & hardware

Hardware development
Reference design
TIDA-00972 ±2% Accurate Humidity Sensing Reference Design Supporting Robust 2m Wire Communication
Download options

TIDCCC6 TIDA-00972 Firmware

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Latest version
Version: 01.00.00.00
Release date: Jun 22, 2016
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Hardware development
Reference design
TIDA-00972 ±2% Accurate Humidity Sensing Reference Design Supporting Robust 2m Wire Communication

Release Information

The design resource accessed as www.ti.com/lit/zip/tidccc6 or www.ti.com/lit/xx/tidccc6/tidccc6.zip has been migrated to a new user experience at www.ti.com/tool/download/TIDCCC6. Please update any bookmarks accordingly.

Technical documentation

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* Design guide ±2% Accurate Humidity-Sensing Reference Design Supporting 2-m Wire Communication (Rev. A) Nov 9, 2016

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