TIDA-00464

High Temperature Touch through Glass Reference Design

TIDA-00464

Design files

Overview

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.  This 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.

This reference design uses the capacitive sensing technology integrated in the FDC2214. The operator will be able to interact with the controller without the need of opening the enclosure to save time by avoiding work permit or plant shutdown.

Features
  • Four robust buttons option omplemented
  • Variable air gap between buttons and glass (1 mm to 2 mm)
  • Finger detection through 10-mm thick glass
  • Work with gloves and in harsh environment (water, oil, dust and more)
  • Temperature range: -40°C to 125°C

Design files & products

Design files

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

TIDUBJ8.PDF (2090 K)

Reference design overview and verified performance test data

TIDRKW2.PDF (211 K)

Detailed schematic diagram for design layout and components

TIDRKW3.PDF (51 K)

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

TIDRKW4.PDF (95 K)

Detailed overview of design layout for component placement

TIDRKW6.ZIP (479 K)

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

TIDCBY2.ZIP (346 K)

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

TIDRKW5.PDF (496 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Signal conditioners

FDC22144-Ch, 28-bit, capacitance to digital converter

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development

Software

GUI for evaluation module (EVM)

Sensing Solutions EVM GUI Tool v1.10.0 (Rev. F) – SNOC028F.ZIP (61513 K)

Technical documentation

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Type Title Date
* Design guide High Temperature Touch Through Glass Design Guide Mar. 07, 2016
Technical article Engineering magic: Touch through thick glass with LEDs and LCD Aug. 18, 2016
Technical article Engineers do better than magicians: HMI touch through a thick glass Apr. 26, 2016

Related design resources

Hardware development

EVALUATION BOARD
FDC2214EVM FDC2214 with Two Capacitive Sensors Evaluation Module

Reference designs

REFERENCE DESIGN
TIDA-00343 Low-Power Touch Through Glass Reference Design TIDA-00466 Noise-immune Capacitive Proximity Sensor System Reference Design TIDA-00494 Touch Through Glass with Sharp ® LCD Reference Design

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