Digital Driver Makes Touchscreen Apps Come Alive

The DRV2667 from TI is being touted as the industry’s most highly integrated piezo haptic driver for HD consumer, automotive and industrial touchscreen applications. Features include a digital interface, integrated 15 V to 105 V boost converter, power diode, and 40 V to 200 Vpp fully-differential amplifier. The driver enables the high fidelity HD haptic experience for a range of products, including smartphones, tablets, white goods and automotive central information displays. The integration of digital waveform generation, high-voltage drive, and 2 kB of RAM eliminates the need for external components, and allows the driver to store and instantly recall haptic waveforms. Digital interface and a 2 ms startup enable a faster haptic effect response time, and a more realistic HD tactile experience that closely resembles the feel of specific events, surfaces or effects. The DRV2667EVM can be purchased for $99 and is supplied with user guide, fully programmable MSP430G2553 Value Line microcontroller, piezo actuator, sample waveforms and capacitive touch buttons. The DRV2667 digital driver is available now in a 20-pin, 4 x 4 x .9 mm QFN package for $2.95 each/1,000.

TEXAS INSTRUMENTS INC.