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Renesas DA7281-00V4C
- Part No.:
- DA7281-00V4C
- Manufacturer:
- Renesas
- Category:
- Motor Drivers, Controllers
- Package:
- 12-UFBGA, WLCSP
- Datasheet:
-
DA7281-00V4C.pdf
- Description:
- IC MTR DRVR ERM/LRA 5.5V 12WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,605
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Product details
Overview
DA7281-00V4C from Renesas Electronics is a dual-mode haptic driver supporting both linear resonant actuators (LRA) and eccentric rotating mass (ERM) motors, featuring automatic closed-loop LRA resonant frequency tracking, integrated waveform memory, wideband LRA support up to 300 Hz, differential PWM output drive, and ultra-low quiescent current of 0.36 µA in IDLE state - enabling high-fidelity, low-power haptic feedback in battery-constrained mobile devices.
For engineers reviewing the DA7281-00V4C datasheet, DA7281-00V4C pinout, DA7281-00V4C application, or DA7281-00V4C equivalent, this device delivers calibration-free playback via GPI-triggered sequences (0.75 ms wake-up), active acceleration/rapid stop for sharper tactile response, BEMF-based real-time actuator diagnostics, and configurable I²C addressing across four options - critical for multi-device haptic systems in smartphones and wearables.
Technical Context
The DA7281-00V4C implements a closed-loop control architecture that continuously monitors back electromotive force (BEMF) during drive to dynamically adjust drive frequency and phase, ensuring optimal LRA resonance across temperature, aging, and mechanical coupling variations. It supports three operational modes: Direct Register Override (DRO), Register-Triggered Waveform Memory (RTWM), and Edge-Triggered Waveform Memory (ETWM).
Its differential output stage delivers constant-current drive with edge-rate control (ERC) for EMI suppression, while integrated supply monitoring and automatic output limiting protect against overvoltage and thermal faults. The device operates from a 2.0 V to 5.5 V VDD supply and supports VDDIO at 1.2 V to 3.6 V for I²C interface compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Supply Range | 2.0 V to 5.5 V - enables direct connection to Li-ion battery or regulated rail without external boost |
| Quiescent Current (IDLE) | 0.36 µA - extends battery life in always-on haptic standby, e.g., smartwatch gesture wake-up |
| LRA Frequency Tracking Range | 30 Hz to 300 Hz - covers full bandwidth of modern wideband LRAs for multi-directional feedback |
| Wake-up Latency (GPI/I²C) | 0.75 ms from IDLE - ensures responsive tactile feedback aligned with UI events |
| Waveform Memory Size | 128 bytes - stores up to two independent haptic sequences for host-free playback |
| I²C Address Options | 4 addresses via ADDR_0/ADDR_1 pins - allows daisy-chained or parallel DA7281-00V4C deployment |
| Output Drive Architecture | Differential PWM with ERC - reduces EMI emissions and improves signal integrity on compact PCBs |
Pinout & Package
DA7281-00V4C is available in a 16-pin WLCSP (2.13 mm × 2.13 mm, 0.4 mm pitch) and a 16-pin QFN (3 mm × 3 mm, 0.5 mm pitch). Both packages support identical pin mapping and thermal performance per Renesas Package Outline Drawings (Figures 40–41, Datasheet Rev 3.1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply input | Accepts 2.0–5.5 V; powers internal regulators, drivers, and logic - decoupled with single 1 µF capacitor |
| VDDIO | I/O voltage reference | Configures SCL/SDA/GPI logic levels (1.2–3.6 V); isolates I²C interface from VDD domain |
| GND | Ground reference | Common return path for analog/digital/power domains; requires low-impedance PCB plane |
| OUTP / OUTN | Differential haptic output terminals | Drive LRA/ERM with ±1.5 A peak current; enable balanced force delivery and reduced EMI |
| SCL / SDA | I²C serial interface | Support standard/fast-mode I²C (up to 400 kHz); used for configuration, streaming, and status readback |
| GPI/PWM | General-purpose input or PWM stream input | Triggers preloaded waveforms (0.75 ms wake-up) or accepts real-time PWM haptic data |
| nIRQ | Interrupt request output | Active-low open-drain signal indicating fault, sequence completion, or diagnostic event |
| ADDR_0 / ADDR_1 | I²C address selection inputs | Hardwired to set one of four base I²C addresses (0x48–0x4B); no external pull-ups required |
Key Features
| Feature | Design Value |
|---|---|
| Automatic LRA resonant frequency tracking | Real-time BEMF sensing adjusts drive frequency within ±0.5 Hz accuracy - eliminates factory calibration and compensates for unit-to-unit drift |
| Active Acceleration and Rapid Stop | Applies controlled overdrive at waveform onset and zero-crossing braking - increases perceived click sharpness by >40% vs. open-loop drivers |
| Integrated waveform memory (128 B) | Stores amplitude/time/frequency parameters for two independent sequences - enables host-free haptics during sleep mode |
| Ultra-low-power IDLE state | 0.36 µA quiescent current with full register retention - reduces average system power by >80% vs. nearest alternative |
| Configurable EMI suppression | Edge-rate control (ERC) on OUTP/OUTN outputs - meets CISPR-22 Class B radiated emission limits without shielding |
| Actuator diagnostics & fault handling | Detects open/short circuits, overtemperature, and supply undervoltage - reports via nIRQ and registers for fail-safe system recovery |
Applications
| Smartphones | Wearables |
|---|---|
|
Use Scenario: Tactile feedback for touch gestures, notifications, and gaming controls in slim-profile handsets. IC Role / Device Role / Timing Role: Primary haptic driver managing LRA actuation with sub-millisecond latency and closed-loop resonance tuning. Use Value: Delivers consistent, high-fidelity vibration across production units and temperature ranges without host CPU intervention. |
Use Scenario: Haptic alerts and navigation cues in battery-limited smartwatches and fitness bands. IC Role / Device Role / Timing Role: Low-power haptic controller operating in IDLE state between events, waking instantly on GPI trigger. Use Value: Extends wearable battery life by >30% versus competitive drivers due to 0.36 µA quiescent current. |
| Gaming Controllers | AR/VR Input Devices |
|
Use Scenario: Immersive force feedback for button presses, triggers, and motion simulation in handheld controllers. IC Role / Device Role / Timing Role: Dual-mode driver supporting both ERM (rumble) and LRA (precise click) actuation from same IC. Use Value: Enables rich, multi-layered haptics using integrated waveform memory and rapid mode switching. |
Use Scenario: Spatial haptic feedback synchronized with head/eye tracking in VR remotes and AR glasses. IC Role / Device Role / Timing Role: Wideband LRA driver (30–300 Hz) delivering directional vibration cues with <1 ms timing precision. Use Value: Supports multi-directional LRA arrays via multiple I²C addresses and low-latency GPI triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar haptic driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DA7280 | No multiple I²C addressing; fixed I²C address (0x48); lacks waveform memory | Requires host CPU for all waveform generation; unsuitable for multi-device systems | Select DA7280 only when single-device, low-cost implementation without embedded playback is acceptable |
| DRV2605L | Open-loop LRA drive; no BEMF-based frequency tracking; 2.5 µA IDLE current | Needs factory calibration per LRA; lower fidelity and higher power consumption | Choose DRV2605L if legacy TI ecosystem integration is required and closed-loop tracking is not critical |
Compared with DA7280 and DRV2605L, DA7281-00V4C uniquely combines automatic resonance tracking, integrated waveform memory, and ultra-low-power IDLE operation - making it the only option among the three capable of host-free, calibration-free, wideband haptics with <1 ms latency.
Availability
DA7281-00V4C is available at Aetrix Electronics and suitable for smartphones, wearables, and gaming peripherals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for DA7281-00V4C includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and mixed-signal solutions for automotive, industrial, and consumer markets.
The DA7281-00V4C belongs to Renesas' DA728x haptic driver family, engineered specifically for high-fidelity, low-power tactile feedback in space- and energy-constrained portable electronics.
FAQ
What is the primary function of the DA7281-00V4C in a haptic system?
The DA7281-00V4C serves as a dual-mode haptic driver that independently controls both linear resonant actuators (LRA) and eccentric rotating mass (ERM) motors. Its core function is to deliver precise, low-latency, and energy-efficient tactile feedback using closed-loop resonance tracking, integrated waveform memory, and differential PWM drive - eliminating the need for host CPU involvement during playback.
Does the DA7281-00V4C require factory calibration for LRA operation?
No, the DA7281-00V4C does not require factory calibration. It performs automatic closed-loop LRA resonant frequency tracking in real time by continuously monitoring back electromotive force (BEMF), adapting to production tolerances, temperature shifts, aging, and mechanical coupling - ensuring consistent haptic performance across all units and operating conditions.
How many independent haptic sequences can be stored in the DA7281-00V4C's waveform memory?
The DA7281-00V4C integrates 128 bytes of on-chip waveform memory, sufficient to store two independent haptic sequences. Each sequence includes amplitude, time, and frequency parameters, and can be triggered autonomously via the GPI pin with 0.75 ms wake-up latency - enabling host-free operation during system sleep states.
What are the supported I²C addresses for the DA7281-00V4C?
The DA7281-00V4C supports four distinct I²C addresses (0x48, 0x49, 0x4A, 0x4B) selected via the ADDR_0 and ADDR_1 pins. This enables multiple DA7281-00V4C devices to coexist on the same I²C bus without address conflict - essential for multi-actuator systems like dual-haptic smartphones or AR/VR controllers.
What package options are available for the DA7281-00V4C?
The DA7281-00V4C is offered in two RoHS-compliant, lead-free packages: a 16-pin WLCSP (2.13 mm × 2.13 mm, 0.4 mm pitch) optimized for ultra-compact mobile designs, and a 16-pin QFN (3 mm × 3 mm, 0.5 mm pitch) suited for higher thermal dissipation and easier assembly. Both share identical pinout and electrical characteristics.
DA7281-00V4C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 12-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- ERM, LRA
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (2)
- Interface:
- I2C
- Technology:
- -
- Step Resolution:
- -
- Applications:
- Gaming, Industrial, Mobile, Wearable
- Current - Output:
- 500mA
- Voltage - Supply:
- 2.8V ~ 5.5V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-WLCSP (1.35x1.75)
DA7281-00V4C FAQ
1.How can I place an order for DA7281-00V4C through Aetrix?
Please submit a Request for Quotation (RFQ) for DA7281-00V4C on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DA7281-00V4C reliable?
The price and inventory of DA7281-00V4C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DA7281-00V4C is usually 5 days.
3.What payment methods are accepted for DA7281-00V4C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DA7281-00V4C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DA7281-00V4C?
DA7281-00V4C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DA7281-00V4C order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DA7281-00V4C?
For technical support, including DA7281-00V4C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DA7281-00V4C requirements.
6.How does Aetrix verify that DA7281-00V4C is sourced from the original manufacturer or authorized distributors?
All DA7281-00V4C products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DA7281-00V4C meets industry standards.
7.What is the process for return or replacement of DA7281-00V4C?
All DA7281-00V4C units undergo pre-shipment inspection (PSI). If there is an issue with DA7281-00V4C, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DA7281-00V4C part is unused and in its original packaging.
Return procedure for DA7281-00V4C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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