DA7281-00V42

Overview

The DA7281-00V42 is a low-power, wide-bandwidth haptic driver IC from the Renesas DA7281 series. It supports multiple I²C addresses and drives both ERM and LRA actuators with frequency tracking up to 300Hz. The device features a 360nA idle power mode with full I²C control and memory retention. It offers low-latency direct drive for haptics, on-the-fly diagnostics, and custom waveform sequences. The component operates within a specified voltage range and is designed for applications requiring complex touch effects.

Feature Summary

• Supports up to four different I²C addresses by utilizing trigger input pins as address pins
• Provides continuous resonance frequency tracking through current monitoring
• Enables ultra-low power consumption with minimal latency from sleep state
• Drives LRAs off-resonance for custom effects or dual-resonant systems

Applications

• Smartphones
• Gaming devices
• Wearables
• Personal medical devices
• Touch displays

Procurement Notes

Verify the specific suffix V42 against official Renesas documentation to confirm package type and tape/reel specifications. Ensure compatibility with system I²C bus configurations given the multi-address capability. Confirm moisture sensitivity levels and storage conditions prior to assembly. Validate that the selected variant meets all thermal and electrical requirements for the target application environment.

Selection Notes

Select this component when multiple haptic drivers are required on a single I²C bus due to its unique addressing scheme. Choose this part for applications demanding ultra-low standby current and fast wake-up times. Consider this driver for designs needing off-resonance LRA driving capabilities for custom haptic feedback patterns. Ensure the host processor can support the required I²C communication protocol and diagnostic features.

Part Context

The DA7281 belongs to the DA728x family of high-definition haptic drivers. It differs from the DA7280 and DA7282 by enabling multiple I²C addresses. This allows system designers to integrate several units without additional address selection hardware. The family targets mobile and wearable markets where power efficiency and space constraints are critical.

FAQ

How does the DA7281 achieve multiple I²C addresses?

It uses two of the original trigger input pins as I²C address pins, allowing up to four devices to operate on the same bus.

What is the idle power consumption of the DA7281?

The device features a 360nA idle power mode while maintaining full I²C control and memory retention.

Can the DA7281 drive LRAs off-resonance?

Yes, it can drive LRAs off-resonance for custom effects or support dual-resonant systems for two-dimensional vibration.