Cypress Semiconductor has announced a new family of CapSense controllers that enable engineers of all levels to quickly implement stylish and robust capacitive buttons, sliders and proximity sensors. The new CY8CMBR3x controllers provide features, such as water tolerance and proximity sensing, without the need for coding or firmware development.
The CY8CMBR3x controllers are part of Cypress’s Mechanical Button Replacement (MBR) family, which leverages Cypress’s SmartSense Auto-tuning algorithm to completely eliminate the requirement for manual system tuning. SmartSense Auto-tuning enables automatic tuning of more than 10 parameters to achieve optimal touch sensing performance.
The CY8CMBR3x devices are supported by Cypress’s EZ-Click software tool, which combines GUI-based configuration, product debug and production-line testing with no firmware development required. The kit provides additional debug and test options, including the ability to vary trace lengths, add parasitic capacitance and change overlay thickness.
According to John Weil, senior director of marketing and applications for PSoC and Capsense at Cypress, “Our new CY8CMBR3x controllers redefine capacitive sensing. Customers no longer have to make a choice between cost and performance, but instead can use low-cost devices with advanced features and proven reliability from the market leader.”
The CY8CMBR3x controllers are intended for applications in a broad range of markets, including consumer, automotive, home appliance, industrial, medical and fitness. The controllers can implement up to 16 capacitive buttons or up to 8 capacitive buttons while driving 8 LEDs. Designers can leverage the devices to add up to two proximity sensors with a 30-cm sensing distance for wake-on-approach applications. Additionally, the CY8CMBR3x controllers feature Flanking Sensor Suppression (FSS) that eliminates false touches when buttons are closely spaced.
Devices in the CapSense MBR family use Cypress’s patented CapSense Sigma-Delta (CSD) sensing method, ensuring enhanced immunity to conducted and radiated noise with a signal-to-noise ratio of greater than 100:1. Operating from 1.8V to 5.5V, the devices are suitabe for a wide range of regulated and unregulated battery applications, including single coin cell battery operation. The controllers also feature an integrated voltage regulator to address power supply noise, as well as filters for any spurious noise.