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TIDA-00464

High Temperature Touch through Glass Reference Design

Design files

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
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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-00464
TIDUBJ8.PDF (2090 K)

Reference design overview and verified performance test data

download Schematic — TIDA-00464
TIDRKW2.PDF (211 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-00464
TIDRKW3.PDF (51 K)

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

download Assembly drawing — TIDA-00464
TIDRKW4.PDF (95 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — TIDA-00464
TIDRKW6.ZIP (479 K)

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

download Gerber file — TIDA-00464
TIDCBY2.ZIP (346 K)

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

download PCB layout — TIDA-00464
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

FDC2214 — 4-Ch, 28-bit, capacitance to digital converter

Data sheet: PDF | HTML

Start development

Software

GUI for evaluation module (EVM)

SNOC028 — Sensing Solutions EVM GUI Tool v1.10.0

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Supported products & hardware

Supported products & hardware

Products
Humidity sensors
HDC1000 — Low Power, 3% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor HDC1050 — ±3% low-power, digital humidity sensor with temperature sensor HDC2010 — 2% RH ultra-small, low-power digital relative humidity sensor HDC2080 — 2% RH ultra-low-power digital relative humidity sensor, interrupt/DRDY
Inductive sensor AFEs
LDC1001-Q1 — Automotive, 5V, grade-0, Inductance to Digital Converter LDC1041 — 1-Ch, 5V, 24-bit L, 8-bit Rp, inductance to digital converter LDC1051 — 1-Ch, 5V, 8-bit Rp, inductance to digital converter LDC1101 — 1-Ch, 1.8V, 24-bit L, 16-bit Rp, inductance to digital converter for high speed applications LDC1312 — 2-Ch, 12-bit, general purpose inductance to digital converter LDC1312-Q1 — 2-Ch, 12-bit, general purpose automotive inductance to digital converter LDC1314 — 4-Ch, 12-bit, general purpose inductance to digital converter LDC1314-Q1 — 4-Ch, 12-bit, general purpose automotive inductance to digital converter LDC1612 — 2-Ch, 28-bit, high-resolution Inductance to digital converter LDC1612-Q1 — 2-Ch, 28-bit, high-resolution automotive inductance to digital converter LDC1614 — 4-Ch, 28-bit, high-resolution Inductance to digital converter LDC1614-Q1 — 4-Ch, 28-bit, high-resolution automotive inductance to digital converter LDC2112 — 2-Ch inductance to digital converter with baseline tracking for low power touch buttons LDC2114 — 4-Ch inductance to digital converter with baseline tracking for low power touch buttons
Signal conditioners
FDC1004 — 4-Ch, 16-bit, capacitance to digital converter with active shield driver FDC1004-Q1 — 4-Ch, 16-bit, automotive capacitance to digital converter with active shield driver FDC2112 — 2-Ch, 12-bit, capacitance to digital converter FDC2112-Q1 — 2-Ch, 12-bit, automotive capacitance to digital converter FDC2114 — 4-Ch, 12-bit, capacitance to digital converter FDC2114-Q1 — 4-Ch, 12-bit, automotive capacitance to digital converter FDC2212 — 2-Ch, 28-bit, capacitance to digital converter FDC2212-Q1 — 2-Ch, 28-bit, automotive capacitance to digital converter FDC2214 — 4-Ch, 28-bit, capacitance to digital converter FDC2214-Q1 — 4-Ch, 28-bit, automotive capacitance to digital converter
Hardware development
Evaluation board
FDC1004EVM — FDC1004EVM - 4 Channel Capacitive to Digital Converter Evaluation Module FDC1004QEVM — Automotive 4-Channel Capacitive to Digital Converter Evaluation Module FDC2114EVM — FDC2114 with Two Capacitive Sensors Evaluation Module FDC2214EVM — FDC2214 with Two Capacitive Sensors Evaluation Module HDC1010EVM — HDC1010 Low Power Humidity and Temperature Sensor Evaluation Module HDC1080EVM — HDC1080 low-power humidity and temperature sensor evaluation module HDC2010EVM — HDC2010 Low Power Humidity and Temperature Sensor Evaluation Module HDC2080EVM — HDC2080 Low Power Humidity and Temperature Sensor Evaluation Module LDC1000EVM — LDC1000EVM - Evaluation Module for Inductance to Digital Converter with Sample PCB Coil LDC1312EVM — LDC1312 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC1314EVM — LDC1314 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC1612EVM — LDC1612 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC1614EVM — LDC1614 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC2114EVM — LDC2114 1.8V 4-Channel Inductive Touch Evaluation Module
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SNOC028 — Sensing Solutions EVM GUI Tool v1.10.0

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Version: 01.00.00.0F
Release date: 24 Feb 2019
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Sensing Solutions EVM GUI Tool v1.10.0 (zip)  — 61513 K

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Products
Humidity sensors
HDC1000 — Low Power, 3% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor HDC1050 — ±3% low-power, digital humidity sensor with temperature sensor HDC2010 — 2% RH ultra-small, low-power digital relative humidity sensor HDC2080 — 2% RH ultra-low-power digital relative humidity sensor, interrupt/DRDY
Inductive sensor AFEs
LDC1001-Q1 — Automotive, 5V, grade-0, Inductance to Digital Converter LDC1041 — 1-Ch, 5V, 24-bit L, 8-bit Rp, inductance to digital converter LDC1051 — 1-Ch, 5V, 8-bit Rp, inductance to digital converter LDC1101 — 1-Ch, 1.8V, 24-bit L, 16-bit Rp, inductance to digital converter for high speed applications LDC1312 — 2-Ch, 12-bit, general purpose inductance to digital converter LDC1312-Q1 — 2-Ch, 12-bit, general purpose automotive inductance to digital converter LDC1314 — 4-Ch, 12-bit, general purpose inductance to digital converter LDC1314-Q1 — 4-Ch, 12-bit, general purpose automotive inductance to digital converter LDC1612 — 2-Ch, 28-bit, high-resolution Inductance to digital converter LDC1612-Q1 — 2-Ch, 28-bit, high-resolution automotive inductance to digital converter LDC1614 — 4-Ch, 28-bit, high-resolution Inductance to digital converter LDC1614-Q1 — 4-Ch, 28-bit, high-resolution automotive inductance to digital converter LDC2112 — 2-Ch inductance to digital converter with baseline tracking for low power touch buttons LDC2114 — 4-Ch inductance to digital converter with baseline tracking for low power touch buttons
Signal conditioners
FDC1004 — 4-Ch, 16-bit, capacitance to digital converter with active shield driver FDC1004-Q1 — 4-Ch, 16-bit, automotive capacitance to digital converter with active shield driver FDC2112 — 2-Ch, 12-bit, capacitance to digital converter FDC2112-Q1 — 2-Ch, 12-bit, automotive capacitance to digital converter FDC2114 — 4-Ch, 12-bit, capacitance to digital converter FDC2114-Q1 — 4-Ch, 12-bit, automotive capacitance to digital converter FDC2212 — 2-Ch, 28-bit, capacitance to digital converter FDC2212-Q1 — 2-Ch, 28-bit, automotive capacitance to digital converter FDC2214 — 4-Ch, 28-bit, capacitance to digital converter FDC2214-Q1 — 4-Ch, 28-bit, automotive capacitance to digital converter
Hardware development
Evaluation board
FDC1004EVM — FDC1004EVM - 4 Channel Capacitive to Digital Converter Evaluation Module FDC1004QEVM — Automotive 4-Channel Capacitive to Digital Converter Evaluation Module FDC2114EVM — FDC2114 with Two Capacitive Sensors Evaluation Module FDC2214EVM — FDC2214 with Two Capacitive Sensors Evaluation Module HDC1010EVM — HDC1010 Low Power Humidity and Temperature Sensor Evaluation Module HDC1080EVM — HDC1080 low-power humidity and temperature sensor evaluation module HDC2010EVM — HDC2010 Low Power Humidity and Temperature Sensor Evaluation Module HDC2080EVM — HDC2080 Low Power Humidity and Temperature Sensor Evaluation Module LDC1000EVM — LDC1000EVM - Evaluation Module for Inductance to Digital Converter with Sample PCB Coil LDC1312EVM — LDC1312 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC1314EVM — LDC1314 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC1612EVM — LDC1612 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC1614EVM — LDC1614 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC2114EVM — LDC2114 1.8V 4-Channel Inductive Touch Evaluation Module

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 PDF | HTML Aug. 18, 2016
Technical article Engineers do better than magicians: HMI touch through a thick glass PDF | HTML 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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