Haptic driver for ERM/LRA with auto-resonance tracking in QFN package


Product details


Haptic actuator type ERM, LRA Features Auto Resonance Input signal PWM, Analog Vs (Min) (V) 2.5 Vs (Max) (V) 5.2 Output voltage (Max) (V) 3.6 Vout (Max) (V p-p) 10.4 Iq (Typ) (mA) 1.7 Shutdown current (ISD) (uA) 0.3 Startup time (ms) 1.3 Operating temperature range (C) -40 to 85 open-in-new Find other Haptic motor drivers

Package | Pins | Size

WQFN (RUN) 10 4 mm² 2 x 2 open-in-new Find other Haptic motor drivers


  • Flexible Haptic/Vibra Driver
    • LRA (Linear Resonance Actuator)
    • ERM (Eccentric Rotating Mass)
  • Auto Resonance Tracking for LRA
    • No Frequency Calibration Required
    • Automatic Drive Commutation
    • Automatic Braking Algorithm
    • Wide Input PWM Frequency Range
  • Constant Vibration Strength Over Supply
  • Automatic Input Level Translation
  • 0% to 100% Duty Cycle Control Range
  • Fast Start Up Time
  • Differential Drive from Single-Ended Input
  • Wide Supply Voltage Range of 2.5 V to 5.2 V
  • Immersion TouchSense® 3000 Compatible
  • 1.8-V Compatible, 5-V Tolerant Digital Pins
  • Available in a 2 mm × 2 mm × 0.75 mm Leadless QFN Package (RUN)
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The DRV2603 is a haptic driver designed specifically to solve common obstacles in driving both Linear Resonance Actuator (LRA) and Eccentric Rotating Mass (ERM) haptic elements. The DRV2603 is designed for low latency, high efficiency, and more drive strength for actuators commonly used for tactile feedback in the portable market.

LRA actuators typically have a narrow frequency band over which they have an adequate haptic response. This frequency window is typically ±2.5 Hz wide or less, so driving an LRA actuator presents a challenge. The DRV2603 solves this problem by employing auto resonance tracking, which automatically detects and tracks the LRA resonant frequency in real time. This means that any input PWM frequency within the input range (10 kHz to 250 kHz) will automatically produce the correct resonant output frequency. As an additional benefit, the DRV2603 implements an automatic braking algorithm to prevent LRA ringing at the end of waveforms, leaving the user with a crisp haptic sensation.

For both ERM and LRA actuators, the automatic input level translation solves issues with low voltage PWM sources without adding additional external components, so if the digital I/O levels vary, the output voltage does not change. The DRV2603 also has supply correction that ensures no supply regulation is required for constant vibration strength, allowing an efficient, direct-battery connection.

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Technical documentation

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Type Title Date
* Data sheet DRV2603 Haptic Drive With Auto-Resonance Detection for Linear Resonance Actuators (LRA) datasheet (Rev. C) Aug. 10, 2016
Application note Haptic Implementation Considerations for Mobile and Wearable Devices Nov. 03, 2014
Application note LRA Actuators: How to Move Them? Nov. 03, 2014
Technical article DRV2605 + MSP430: Moving the world! Oct. 12, 2014
More literature Haptic Solutions for Wearable Devices (Rev. A) Sep. 30, 2014
Application note Haptic Energy Consumption Jun. 04, 2014
Application note Benefits of LRA Auto-Resonance Tracking Oct. 15, 2013
User guide DRV2603 ERM/LRA Haptic Driver Evaluation Kit (Rev. B) Sep. 24, 2013
More literature Automotive Haptics Solutions Sep. 16, 2013
Technical article MSP430 365/24/7: MSP430 microcontrollers in “always on” consumer applications Feb. 11, 2013
More literature Haptics: Touch feedback that really moves you (Rev. A) Jan. 08, 2013
More literature Haptics: Solutions for ERM and LRA Actuators Dec. 18, 2012
More literature DRV2603EVK-CT Quick Start Guide Apr. 20, 2012

Design & development

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Hardware development

document-generic User guide
  • Drives ERM & LRA actuators
  • LRA Auto-Resonance Detection
  • Complete Evaluation Kit including actuator and capacitive buttons
  • Includes programmable MSP430 with sample haptic waveforms
  • Software development

    MSP430TCH5E Capacitive Touch with Haptics Software Development Kit
    MSP430-HAPTOUCH-SDK This is a software development kit for the MSP430TCH5E HAPTOUCH booster pack. It also includes MSP430 Launchpad software (for PC communication) and PC applications (to experience PC gaming) with capacitive touch and Immersion Touchsense 2200™ haptics.

    Learn more about the MSP430TCH5E HAPTOUCH booster (...)
    • Fully programmable HAPTOUCH boosterpack software development kit.
    • MSP430 Haptics Library featuring Immersion Tourchsense 2200 technology.
    • Code example for use of the haptics library in simple applications

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    QFN (RUN) 10 View options

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