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Touch sensor is cheaper than clicks
15th December, 2005

Quantum Research is offering a 10-key touch sensor chip which it claims will be cost competitive with mechanical switchers in rugged control panels.
The channels can be individually tuned for sensitivity via its serial interface. They can also be user-configured to suit the application. The cost savings come in the need for fewer passive components for each channel.

The QT1100A-ISG sensor chip recalibrates each channel automatically every time it is powered up, compensating for gradual environmental changes and product ageing.

The device has SPI and UART serial interfaces along with a scanport output that simulates a membrane keyboard.
It self-detects faults for FMEA compliance, making it suited to applications in domestic appliances, television controls, instrument panels, pointing devices and gaming machines.

The QT1100A-ISG operates from a single 3.3V to 5.0V supply and is housed in a 48-pin SSOP, lead-free (RoHS compliant) package.

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