TIDA-00343: Low-Power Touch Through Glass Reference Design


Human Machine Interface (HMI) is an essential part of process plants since it is one of the major ways through which humans and machines interact. The TIDA-00343 reference design offers an HMI solution for harsh and hazardous area applications. In process plants, operators need to interact with an explosion-proof display/controller which is encapsulated in a screw-on metallic enclosure with a thick glass window for local read out and programming functions.

Thanks to the TIDA-00343 TI Design which uses MSP430™ microcontrollers (MCU) with CapTIvate™ technology the operator will be able to interact with the controller without the need of opening the enclosure saving time by avoiding work permit or plant shutdown.


  • Four Robust Buttons Option Implemented

  • Variable Airgap between Buttons and Glass(1-2mm)

  • Finger Detection through 10mm Thick Glass

  • Work with Gloves and in Harsh Environment(Water, Oil, Dust, etc)

  • Temperature Range: -40°C to 85°C

  • Low Power(~10Hz Scan Rate): 240µA-avg


Manufacturer Texas Instruments
Category Sensor Solutions
Sub-Category Capacitive Sensing
Eval Board Part Number 296-43746-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Number & Type of Sensors 4 Buttons
Features I²C Interface
Application / Target Market HMI Interfaces
White Goods
Component Count + Extras 8 + 5
Design Author Texas Instruments
Voltage In 3.3 V
Sleep Mode Current [Maximum] Not given
Main I.C. Base Part MSP430FR2633
Quiescent Current [Maximum] 3.4 mA
Sleep Mode Current [Typical] Not given
Quiescent Current [Typical] 240 µA

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