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DA7281

LRA/ERM Haptic Driver with Multiple I²C Addresses,

Integrated Waveform Memory, and Wideband Support

Datasheet

Revision 3.0

30-Jul-2019

CFR0011-120-00

1 of 76

General 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 complexity. 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 pre-

loaded 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. 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

■ LRA or ERM drive capability

■ Automatic LRA resonant frequency tracking

■ Wideband LRA support

■ I2C and PWM input streaming

■ Low latency (0.75 ms) I2C/GPI wake-up

from low power consumption IDLE state,

IQ = 0.36 µA

■ Ultra-low latency (0.15 ms) wake-up from

STANDBY state, IQ = 0.8 mA

■ GPI pin for triggering of up to two independent

haptic sequences

■ On-board Waveform Memory with amplitude,

time, and frequency control

■ Active Acceleration and Rapid Stop

technology for high-fidelity haptic feedback

■ Actuator diagnostics and fault handling

■ Up to four I2C addresses via two address pins

■ No software requirements with embedded

operation

■ Differential PWM output drive

■ Current driven system to deliver constant

actuator power

■ Configurable EMI suppression

■ Automatic short circuit protection

■ Ultra-low power consumption, IQ = 0.36 µA,

with state retention in IDLE state

■ Supply monitoring, reporting, and automatic

output limiting

■ Open- and closed-loop modes

■ Custom wave drive support

■ Small solution footprint requiring only one

decoupling capacitor in both WLCSP and QFN

Applications

■ Smartphones, wearables, and hearables

■ Computer peripherals

■ Gaming

■ Automotive and industrial

■ Virtual and augmented reality controllers

References

Battery

Monitor

Over-

Temperature

Protection

VDDIO

SCL

SDA

GND

nIRQ

ADDR_0

ADDR_1

GPI/PWM

DA7281

VDD

OUTP

OUTN

LRA/

ERM

ERC Driver

Short Circuit

Protection

BEMF Sensing and

Actuator Diagnostics

I

2C

Resonant

Frequency

Tracking,

Active

Acceleration,

Rapid Stop,

and

Waveform

Memory

Số phần tương tự - DA7281-00FVC

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Renesas Technology Corp	DA7281-00FVC	1Mb / 88P	LRA/ERM Haptic Driver with Multiple I²C Addresses, Integrated Waveform Memory, and Wideband Support 10-Feb-2022

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Mô tả tương tự - DA7281-00FVC

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
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Diodes Incorporated	PAM8016	500Kb / 10P	HAPTIC DRIVER FOR ERM AND LRA Rev 2.0
Dialog Semiconductor	DA7280	1Mb / 76P	LRA/ERM Haptic Driver with Multiple Input Triggers, Integrated Waveform Memory and Wideband Support
Dialog Semiconductor	DA7282	1Mb / 77P	LRA/ERM Ultra-Low Power Haptic Driver with Multiple Input Triggers and Integrated Waveform Memory
Renesas Technology Corp	DA7280-A	1Mb / 80P	Wideband LRA/ERM Haptic Driver for Automotive Applications 01-Mar-2022
	DA7280	1Mb / 85P	LRA/ERM Haptic Driver with Multiple Input Triggers, Integrated Waveform Memory and Wideband Support 02-Mar-2022
	DA7281	1Mb / 88P	LRA/ERM Haptic Driver with Multiple I²C Addresses, Integrated Waveform Memory, and Wideband Support 10-Feb-2022
	DA7282	1Mb / 88P	LRA/ERM Ultra-Low Power Haptic Driver with Multiple Input Triggers and Integrated Waveform Memory 10-Feb-2022

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