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Controllers promise to speed up capacitive sensing designs

11 Dec 2015

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The TouchXpress controllers' exceptional energy efficiency enables long battery life, as well as the use of smaller batteries for wearables and other portable devices, added the company. An impressive signal-to-noise ratio (SNR) results in better reliability and touch performance, which are important to instrumentation and control applications.

Silicon Labs simplifies capacitive touch development with native support for TouchXpress controllers within the Simplicity Studio development platform. This unified software environment provides advanced tools for configuring and profiling capacitive sense data. The Xpress Configurator quickly configures touch parameters, generates required customisations and includes factory programming options. The Capacitive Sense Profiler features a simple GUI for real-time capacitive sense evaluation, which accelerates prototyping and eases the task of visualising and tuning the system. To further speed development, Silicon Labs supports the CPT007B and CPT112S controllers with the cost-effective SLEXP8007A and SLEXP8008A evaluation kits, respectively.

CPT007B block diagram

CPT007B block diagram

Samples and production quantities of TouchXpress controllers are available in 3mm x 3mm QFN20 packages. Pricing for the CPT007B device in 10,000-unit quantities begins at $0.83. Pricing for the CPT112S device in 10,000-unit quantities begins at $0.72. The SLEXP8007A and SLEXP8008A evaluation kits are available for $19 each.

CPT112S block diagram

CPT112S block diagram

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