Renesas DA7280-00V4C

Overview

DA7280-00V4C 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 (±0.5 Hz accuracy), integrated waveform memory (128-byte capacity), 0.75 ms low-latency GPI/I²C wake-up from 0.36 µA IDLE state, and Active Acceleration + Rapid Stop for high-fidelity tactile feedback in mobile interfaces.

For engineers reviewing the DA7280-00V4C datasheet, DA7280-00V4C pinout, DA7280-00V4C application, or DA7280-00V4C equivalent, key selection criteria include closed-loop LRA tracking stability across temperature/aging, ultra-low quiescent current during haptic idle periods, differential PWM output drive architecture, integrated BEMF sensing for real-time actuator diagnostics, and support for three independent GPI-triggered haptic sequences without host intervention.

Technical Context

The DA7280-00V4C implements a continuous BEMF-sensing loop during active drive-unlike conventional haptic drivers that pause drive to sample BEMF-enabling real-time resonant frequency adaptation and sub-millisecond acceleration control. Its dual-mode regulation loop supports both open-loop ERM operation and closed-loop LRA control with PID-based frequency tracking.

It integrates configurable edge-rate control (ERC) on differential outputs (OUTP/OUTN), programmable waveform memory playback via RTWM/ETWM modes, and hardware-accelerated GPI sequence triggering (GPI_0/PWM, GPI_1, GPI_2) with independent amplitude/time/frequency control per snippet-eliminating software runtime overhead for common haptic events.

Key Specifications

Pinout & Package

DA7280-00V4C is available in a 16-pin WLCSP package (2.13 mm × 2.13 mm, 0.4 mm pitch) and a 16-pin QFN package (3 mm × 3 mm, 0.5 mm pitch). Both packages support identical pin mapping and thermal performance per Renesas datasheet Rev 3.2 (pp. 10, 76–77).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar haptic driver applications.

Compared with DA7280-00V4C, the DRV2625RGER offers lower system cost but sacrifices ERM compatibility and autonomous GPI triggering, while the STHV748BTR serves a fundamentally different actuator class-making DA7280-00V4C uniquely suited for dual-mode, low-power, self-contained haptic subsystems.

Availability

DA7280-00V4C is available at Aetrix Electronics and suitable for smartphones, wearables, and automotive human-machine interfaces requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for DA7280-00V4C 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 DA7280 product line targets next-generation haptic feedback systems-designed to replace mechanical buttons with energy-efficient, high-fidelity tactile interfaces in space-constrained portable electronics.

FAQ

What is the primary function of the DA7280-00V4C in a haptic system?

The DA7280-00V4C serves as a fully integrated haptic driver for both linear resonant actuators (LRA) and eccentric rotating mass (ERM) motors. It delivers closed-loop LRA frequency tracking, differential PWM output drive, integrated waveform memory, and autonomous GPI-triggered playback-enabling high-fidelity, low-latency tactile feedback without continuous host processor involvement. The DA7280-00V4C eliminates the need for external memory or calibration routines in production systems.

How does the DA7280-00V4C achieve ultra-low power consumption during idle periods?

The DA7280-00V4C achieves 0.36 µA quiescent current in its IDLE state by powering down all non-essential circuitry-including the output drivers, BEMF sensing path, and I²C interface-while retaining register and waveform memory contents. Wake-up occurs within 0.75 ms via GPI or I²C activity, making it ideal for battery-powered devices like wearables and remote controls where standby efficiency directly impacts operational lifetime. This value is confirmed in Table 6 of the DA7280-00V4C datasheet Rev 3.2.

Does the DA7280-00V4C support both LRA and ERM actuators simultaneously?

No-the DA7280-00V4C supports either LRA or ERM operation per configuration, selected via the ACTUATOR1 register (0x000C). LRA mode enables closed-loop resonant tracking and Active Acceleration/Rapid Stop, while ERM mode uses open-loop drive with fixed-frequency PWM. The DA7280-00V4C cannot drive both actuator types concurrently on the same OUTP/OUTN outputs. Configuration is static per power cycle unless reprogrammed via I²C.

What is the role of the GPI pins (GPI_0/PWM, GPI_1, GPI_2) on the DA7280-00V4C?

The three GPI pins on the DA7280-00V4C provide hardware-level, zero-CPU-latency triggering of preloaded haptic sequences stored in the integrated waveform memory. GPI_0 is multifunctional (supports PWM input or GPI), while GPI_1 and GPI_2 each support two independent sequences-enabling up to six distinct tactile events (e.g., short click, long press, double tap) without host intervention. This capability is documented in Section 5.6 and Table 2 of the DA7280-00V4C datasheet.

Can the DA7280-00V4C operate without an I²C host controller?

No-the DA7280-00V4C requires I²C initialization to configure operating mode, load waveform memory, set GPI mappings, and enable features such as Active Acceleration or ERC. Unlike the DA7283 (which supports standalone operation), the DA7280-00V4C has no internal OTP or boot ROM; all configuration must be performed by a host processor at startup. This dependency is explicitly stated in the Product Family table (p. 7) and Section 5.6 of the datasheet.