Datasheet
Table Of Contents
- General Description
- Key Features
- Applications
- System Diagrams
- Contents
- Figures
- Tables
- Legal
- Product Family
- 1 Terms and Definitions
- 2 Block Diagram
- 3 Pinout
- 4 Characteristics
- 5 Functional Description
- 5.1 Features Description
- Driving LRA and ERM Actuators
- Automatic LRA Resonant Frequency Tracking
- Wideband LRA Support
- I2C and PWM Input Streaming
- Low Latency I2C/GPI Wake-Up from IDLE State
- Three GPI Sequence Triggers for up to Six Independent Haptic Responses
- On-Board Waveform Memory with Amplitude, Time, and Frequency Control
- Active Acceleration and Rapid Stop for High-Fidelity Haptic Feedback
- Continuous Actuator Diagnostics and Fault Handling
- No Software Requirements with Embedded Operation
- Differential Output Drive
- Current Driven System
- Configurable EMI Suppression
- Automatic Short Circuit Protection
- Ultra-Low Power Consumption with State Retention
- Ultra-Low Latency in STANDBY State
- Supply Monitoring, Reporting, and Automatic Output Limiting
- Open- and Closed-Loop Modes
- Open-Loop Sine/Custom Wave Drive Support
- Small Solution Footprint
- Additional Features
- 5.2 Functional Modes
- 5.3 Resonant Frequency Tracking
- 5.4 Active Acceleration and Rapid Stop
- 5.5 Wideband Frequency Control
- 5.6 Device Configuration and Playback
- 5.7 Advanced Operation
- 5.7.1 Frequency Tracking
- 5.7.2 Rapid Stop
- 5.7.3 Initial Impedance Update
- 5.7.4 Amplitude PID
- 5.7.5 Wideband Operation
- 5.7.6 Custom Waveform Operation
- 5.7.7 Embedded Operation
- 5.7.8 Polarity Change Reporting for Half-Period Control in DRO Mode
- 5.7.9 Loop Filter Configuration
- 5.7.10 UVLO Threshold
- 5.7.11 Edge Rate Control
- 5.7.12 Double Output Current Range
- 5.7.13 Supply Monitoring, Reporting, and Automatic Output Limiting
- 5.7.14 BEMF Fault Limit
- 5.7.15 Increasing Impedance Detection Accuracy
- 5.7.16 Frequency Pause during Rapid Stop
- 5.7.17 Frequency Pause during Rapid Stop
- 5.7.18 Coin ERM Operation
- 5.8 Waveform Memory
- 5.9 General Data Format
- 5.10 I2C Control Interface
- 5.1 Features Description
- 6 Register Overview
- 7 Package Information
- 8 Ordering Information
- 9 Application Information
- 10 Layout Guidelines
DA7280
LRA/ERM Haptic Driver with Multiple Input Triggers,
Integrated Waveform Memory and Wideband Support
Datasheet
Revision 3.0
30-Jul-2019
CFR0011-120-00
18 of 76
© 2019 Dialog Semiconductor
Small Solution Footprint
Available in an ultra-small 1.35 mm x 1.75 mm, 0.4 mm pitch, 0.545 mm height, 3 x 4 WLCSP, or a
3.0 mm x 3.0 mm, 0.65 mm pitch, 0.78 mm height, 12 lead QFN package, DA7280 minimizes the
required PCB size and overall solution cost. In the typical application case, only a single 100 nF
decoupling capacitor is required. See Section 9 and Section 10.
Additional Features
DA7280 also features:
● A temperature and supply stable (±1.5 %) internal oscillator which guarantees consistent haptic
playback in the frequency domain over a wide range of operating conditions.
● Automatic over-temperature warning and shutdown capability.
● Low pad leakage current (typ. < 50 nA, for all pads combined).
● Low idle current from VDDIO (typ. 130 nA at 1.8 V).
● I
2
C operation down to V
DDIO
= 1.35 V
● Output PWM frequency, at 187.5 kHz, is 167.5 kHz away from the audio band and at a non-audio
sample rate multiple. This prevents audible fold back via supply disturbance common in near-
audio-band switching haptic drivers.
● Easy to use Dialog SmartCanvas™ GUI with a user tab for fast device setup without the need to
directly interact with registers and an intuitive graphical environment for Waveform Memory
editing and visualization.