Gen5 TrueTouch controllers silence noise from chargers and displays
Gen5 TrueTouch controllers from Cypress Semiconductor Corp. offer 40 volt peak-to-peak (Vpp) charger noise immunity measured from 1 to 500 kHz with an ultra-thin 0.5-mm cover lens and a finger-size up to 22 mm—the most stringent specifications used to measure any touchscreen controller. According to the company, no competing controllers deliver noise immunity over 15 Vpp under these conditions.
The Gen5 controllers have been architected with a new analog front-end that drives the touchscreen at 10 V and at high frequency with narrow-band, single-pass scanning and advanced hardware DSP filtering. Gen5’s unmatched noise immunity enables designers of next-generation handsets to implement ultra-thin, display-integrated stackups, including In-Cell, On-Cell, & direct lamination onto a noisy display. The result will be thinner, sleeker end products with no missed or false touches and low jitter (less than 0.5 mm).
The Gen5 product line delivers both self- and mutual-capacitance sensing on the same chip, assuring superior waterproofing for seamless performance in real-world conditions, including the presence of rain, condensation, or sweat. Gen5 boasts a 120Hz refresh rate, and a deep-sleep mode that draws only 4.5 uW. The new devices currently offer up to 36 capacitive sensing I/Os for ideal sensor pitch with screens up to 5 inches, and support standalone CapSense touch-sensing buttons.
Production samples of the new Gen5 controllers are now available to lead customers. Cypress expects to ship volume production to lead customers in the second quarter of 2013.