Datasheet > DA7281

DA7281

更新时间： 2024-11-26 14:57:31

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
88页	1540K
描述
Low Power, Wide-Bandwidth Haptic Driver with Multiple I2C Addresses

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DA7281 数据手册

DA7281

LRA/ERM Haptic Driver with Multiple I²C

Addresses, Integrated Waveform Memory, and

Wideband Support

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

■

Up to four I²C addresses via two address pins

Automatic LRA resonant frequency tracking

No software requirements with embedded

operation

Wideband LRA support

I²C and PWM input streaming

Low latency (0.75 ms) I²C/GPI wake-up

from low power consumption IDLE state,

I_Q= 0.36 µA

■

Differential PWM output drive

Current driven system to deliver constant

actuator power

■

Configurable EMI suppression

Automatic short circuit protection

■

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

STANDBY state, I_Q= 0.8 mA

Ultra-low power consumption, I_Q= 0.36 µA,

with state retention in IDLE state

GPI pin for triggering of up to two independent

haptic sequences

■

Supply monitoring, reporting, and automatic

output limiting

On-board Waveform Memory with amplitude,

time, and frequency control

■

Open- and closed-loop modes

Custom wave drive support

Active Acceleration and Rapid Stop

technology for high-fidelity haptic feedback

Small solution footprint requiring only one

decoupling capacitor in both WLCSP and QFN

Actuator diagnostics and fault handling

Datasheet

Revision 3.1

10-Feb-2022

CFR0011-120-00

1 of 87

12 3 4 5 6 7...88

中文翻译

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与DA7281相关器件

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DA7282	RENESAS	获取价格	Ultra-Low Power, Wide-Bandwidth Haptic Driver
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DA7401	RENESAS	获取价格	High-performance, Ultra-low-power Mono Hi-fi Codec
DA7402	RENESAS	获取价格	High-performance, Ultra-low-power Stereo Hi-fi Codec With Wideband Digital ANC
DA7403	RENESAS	获取价格	Active Noise Cancellation and Beamforming CODEC
DA78L05	DCCOM	获取价格	TECHNICAL SPECIFICATIONS OF 3-TERMINAL POSITIVE VOLTAGE REGULATOR
DA78L05A	DCCOM	获取价格	TECHNICAL SPECIFICATIONS OF 3-TERMINAL POSITIVE VOLTAGE REGULATOR
DA78L06	DCCOM	获取价格	TECHNICAL SPECIFICATIONS OF 3-TERMINAL POSITIVE VOLTAGE REGULATOR
DA78L06A	DCCOM	获取价格	TECHNICAL SPECIFICATIONS OF 3-TERMINAL POSITIVE VOLTAGE REGULATOR

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