company blog about Microchip AT42QT2100-MUR 7 Channel QTouch Touch Sensor IC

Microchip AT42QT2100-MUR 7 Channel QTouch Touch Sensor IC

Product Description Of AT42QT2100-MUR

AT42QT2100-MUR is an easy-to-use sensor IC based on the charge-transfer (QT" ) principles for robust operation and ease of design. This device has many advanced features which provide for reliable, trouble-free operation over the life of the product. In particular the AT42QT2100-MUR features advanced self-calibration, drift compensation, and fast thermal tracking. The AT42QT2100-MUR can tolerate some fluctuations in the power supply, and in many applications will not require a dedicated voltage regulator.

The AT42QT2100-MUR is capable of detecting near-proximity or touch on up to seven electrodes and a slider/wheel. It allows electrodes to project sense fields through any dielectric such as glass or plastic. These electrodes are laid out as a scroller (slider or wheel), plus seven additional independent keys.

Each key channel can be tuned for a unique sensitity level by simply changing a corresponding external Cs capacitor, whereas the slider/wheel sensitivity can be changed dynamically through SPI commands. Any number of key channels can be optimized for operation as hand proximity sensors by increasing the sensitivity for the corresponding channel.

Core Benefits Of AT42QT2100-MUR

High sensitivity and anti-interference: With load-compensated charge sensing, parasitic capacitance compensation and hardware noise filtering technology, the AT42QT2100-MUR is able to achieve a stable touch response in complex electromagnetic environments without additional temperature or voltage compensation.

Low-power design: The AT42QT2100-MUR operates over a wide voltage range of 2V~5.5V, making it suitable for battery-powered devices such as wearables or portable instruments.

Simplified development process: The AT42QT2100-MUR integrates the QTouch library firmware and the QTouch Composer tool, allowing developers to quickly configure and debug sensors and shorten the time-to-market.

Package and Compatibility: The AT42QT2100-MUR is available in a 32-VQFN (5x5mm) surface mount package and is compatible with the QT1106 feature set, allowing it to be used as a direct replacement for older designs.

Specifications Of AT42QT2100-MUR

Type：Buttons, Slider, Wheel

Proximity Detection：Yes

Number of Inputs：Up to 8

Interface：SPI

Resolution：14 b

Voltage - Supply：2V ~ 5.5V

Operating Temperature：-40°C ~ 85°C

Unit Weight: 60.800 mg

Features Of AT42QT2100-MUR

●Number of QTouch@ Keys:0 to 7, one slider or one wheel

●Technology:Patented spread-spectrum charge-transfer

●Key Outline Sizes:5 mm x 5 mm or larger; widely different sizes and shapes possible

●Key Spacing:6 mm or wider, center to center

●Key Design:Single solid or ring shaped electrodes; wide variety of possible layouts

●Wheel Size:Typically 30 - 50 mm diameter, resistively interpolated wheel up to 80 mm diameter, typical width 12 mm

●Slider Size:Typically 50 - 100 mm length, typical width 12 mm

●Slider/Wheel Electrode Design:Choice of spatially interpolated or resistively interpolated design；Slider can be an arc or other irregular shape

●Layers Required:One layer substrate; electrodes and components can be on same side

●Substrates:FR-4, low cost CEM-1 or FR-2 PCB materials; polyamide FPCB; PET films, glass

●Electrode Materials:Copper, silver, carbon, ITO, virtually anything electrically conductive

●Panel materials:Plastic, glass, composites, painted surfaces

●Adjacent Metal:Compatible with grounded metal immediately next to keys

●Panel Thickness:For keys, up to 15 mm glass, 10 mm plastic；For slider/wheel, up to 4 mm glass, 3 mm plastic

●Key Sensitivity:Adjustable via change in sampling capacitor value

●Interface:SPI @ 750 kHz, CHANGE and DRDY status indicator pins

●Moisture Tolerance:Increased moisture tolerance based on hardware design and firmware tuning

●Power:2.0V to 5.5 V

●Signal Processing:Self-calibration, autodrift compensation, noise filtering, patented Adjacent Key Suppression

Industry Applications Of AT42QT2100-MUR

With its multi-function interface (SPI) and wide temperature operating range (-40°C~85°C), AT42QT2100-MUR is suitable for the following scenarios:

Smart Home: AT42QT2100-MUR is used in touch panels, lighting switches and home appliance control modules, and supports waterproof and dirt-resistant design to enhance user experience.

Industrial control: AT42QT2100-MUR is used in instrumentation or automation equipment to achieve highly reliable touch operation and adapt to stable operation in harsh environments.

Automotive electronics: AT42QT2100-MUR is used as a touch solution for in-vehicle centre control or seat adjustment, which meets the requirements of automotive-grade reliability.

Consumer electronics: such as mobile phone accessories, gaming peripherals, etc. AT42QT2100-MUR supports customised button shape and sensitivity adjustment.

Connection Diagram Of AT42QT2100-MUR