DA7281
Description
DA7281 is a linear resonant actuator (LRA) and eccentric rotating mass (ERM) haptic driver offering automatic closed-loop LRA resonant frequency tracking. The feature guarantees consistency across LRA production tolerances, operating temperature, aging, and mechanical coupling. DA7281 offers wideband operation that fully utilizes the capabilities of newer wideband and multi-directional LRAs.
The differential output drive architecture and continuous actuator motion sensing enable efficient, calibration-free playback and minimize software plexity. Featuring wake-up on General Purpose Input (GPI) sequence trigger and/or I2C activity, DA7281 automatically returns to a low quiescent current state (typically 0.36 µA) between playbacks. At only 20 % of the idle current of the nearest alternative solution, DA7281 significantly extends battery life in mobile systems.
To reduce system plexity, an integrated Waveform Memory allows haptic sequences to be preloaded to DA7281....
