DA7280-A Datasheet | Renesas

Description DA7280-A 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. DA7280A offers wideband operation that fully utilizes the capabilities of newer wideband and multi-directional LRAs. It is qualified for automotive applications to the AEC Q-100 Grade 2 standard. 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 triggers and/or I2C activity, DA7280-A 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, DA7280-A significantly extends battery life in mobile systems. To reduce system plexity, an integrated Waveform Memory allows haptic sequences to be preloaded to DA7280-A. Independent sequences can be triggered, with low latency (0.75 ms), by up to three separate input pins without host interaction. Haptic sequences can also be streamed to DA7280-A from an external source via I2C or pulse width modulated (PWM) signal. DA7280-A 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. This offers significant advantages over existing solutions that need to move into a high-impedance state during drive to measure the BEMF, which adds a considerable amount of inactive time to the sequence and lowers the effective click strength for a given LRA. Key Features - AEC Q-100 Grade 2 Qualified - Actuator diagnostics and fault handling - LRA or ERM drive capability - Automatic LRA resonant frequency tracking - Wideband LRA support - I2C and...