DA7282-00FVC datasheet(16/75 Pages) RENESAS

16 / 75 page

LRA/ERM Ultra-Low Power Haptic Driver with Multiple Input Triggers and Integrated Waveform Memory

R15DS0041EE0330 Rev.3.30

June 16, 2026

CFR0011-120-00

Page 16

6.1.2.1.1 Wideband LRA Support

Wideband LRAs respond across a frequency range typically several times wider than narrowband ones, as

demonstrated in Figure 6, and can be used in combination with DA7282 to create a richer haptic feedback

experience by utilizing the increased vibrational frequency range, see Section 6.5.

Frequency [Hz]

0.5

200

Wideband LRA

Standard

Narrowband LRA

Figure 6. Narrowband and wideband LRA response across frequency

Dual mode actuators (DMA) consist of two modes of vibration in different axes around different resonance

points, depending on actuator construction. The two resonant points, wide response frequency, and different

direction of vibration allow immersive gaming experience with multiple unique feedback effects. Figure 7 shows a

typical DMA response, vibration in the y-axis occurs if the DMA is driven at 100 Hz and vibration in the x-axis

occurs if the DMA is driven at 200 Hz.

Frequency [Hz]

0.5

200

X-axis Resonance

100

Y-axis Resonance

Useful Operating Range

X-axis Vibration

Dual Mode LRA

Figure 7. Dual mode LRA response across frequency

The ability of DA7282 to control the frequency (25 Hz to 1000 Hz) and amplitude of the drive over time as well as

the type of output wave allows the use of wideband sequences fully utilizing the capabilities of wideband and

dual mode actuators for creating a richer user experience, see Section 6.7.5. Example use cases in DMAs are

excitation of both resonant peaks simultaneously for maximum perceptible vibration or distinct single-frequency

event-signaling clicks at different resonant frequencies and physical directions. Both DMAs and wideband LRAs

can also be used to augment user audio experience by playing audio-derived haptic sequences over their useful

frequency operating range.

DA7282 supports all of the above use cases and drives wideband LRAs via I2C or wideband Waveform Memory

sequences triggered by I2C or GPIs. The output drive can be configured as either square wave, sine wave, or

custom wave to create different end effects, see Section 6.7.6.

Usually, LRA resonant frequency tracking is disabled during wideband operation. However, it can be enabled to

either locate the resonant peak of wideband actuators, or to operate at a selected DMA resonance point and

achieve the maximum possible actuator acceleration for a set input power, see Section 6.3 and Section 6.7.1.

6.1.2.1.2 I2C and PWM Input Streaming

Haptic playback data can be streamed externally either via I2C direct register override or from a PWM data

source, see Section 6.2.2. The external input data PWM frequency is independent of the output PWM signal

frequency driven to the actuator. The input PWM signal is low-pass filtered to create a varying DC level that is

the envelope for the drive across the actuator.

DA7282-00FVC Datasheet(PDF) 16 Page - Renesas Technology Corp

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