containsmachine

Liquid-resistant capacitive touch keyboard reference design

TIDM-1021

Overview

Liquid Tolerant Capacitive Touch Keyboard Design (TIDM-1021) is a reference design for implementing a liquid tolerant capacitive touch human machine interface (HMI). It integrates TI's MSP430FR2633 microcontroller (MCU) with high-performance CapTIvate™ touch technology and optimized sensor layout design and software. This reference design demonstrates how to design capacitive touch hardware and software that can operate reliably under the influence of liquids and pass challenging conducted noise immunity testing.

characteristic

● MSP430™ CapTIvate MCU enables liquid-resistant capacitive touch sensing
● Advanced human interface design with 12-button keypad
● 12 LEDs that can be driven by MSP430 CapTIvate MCU for backlighting
● Passed IEC 61000-4-6 conducted noise immunity test with 3Vrms stress level
● Under IPX5 level testing using AC power, there is no false positive touch detection and the touched button can be accurately detected

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Documentation

Liquid-resistant capacitive touch keyboard reference design

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-07-17 01:00:17

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