DA7281 Datasheet PDF | Renesas Electronics

Renesas Electronics DA7281

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. The differential output drive architecture and continuous actuator motion sensing enable efficient, calibration-free playback and minimize software complexity.

Part No.	DA7281
Datasheet	DA7281 Download
Manufacturer	Renesas Electronics
Description	LRA/ERM Haptic Driver
Buy	Stock & Price

GENERAL DESCRIPTION

DA7281 offers wideband operation that fully utilizes the capabilities of newer wideband and multi-directional LRAs. 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 complexity, an integrated Waveform Memory allows haptic sequences to be preloaded to DA7281. Independent sequences can be triggered, with low-latency (0.75 ms), by the GPI pin without host interaction. Haptic sequences can also be streamed to DA7281 from an external source via I2C or pulse width modulated (PWM) signal. DA7281 actively monitors the back electromotive force (BEMF) while continuously driving and applies closed-loop Active Acceleration and Rapid Stopping for sharper clicks and a higher fidelity user experience.