Monolithic Power Systems Inc. MA330GQ-Z

Overview

MA330GQ-Z from Monolithic Power Systems is a 14-bit contactless magnetic angle sensor with integrated ABZ quadrature and UVW commutation outputs, designed for high-speed motor position feedback in brushless DC servo drives. It delivers absolute angle measurement at up to 60,000 rpm, supports programmable filter windows (64 µs to 16 ms), and features on-chip non-volatile memory for zero-angle calibration, ABZ pulse-per-turn configuration (1–1024), and magnetic field strength diagnostics.

For engineers reviewing the MA330GQ-Z datasheet, MA330GQ-Z pinout, MA330GQ-Z application in BLDC motor commutation, or MA330GQ-Z equivalent for high-resolution angular sensing in industrial motion control, this device offers verified 0.7° INL accuracy at 25°C, SPI-configurable 9–14-bit resolution, and dual-output flexibility across end-of-shaft and side-shaft magnet configurations.

Technical Context

The MA330GQ-Z employs Spinaxis™ phase-detection architecture-digitizing magnetic field direction directly via time-to-digital conversion without arctangent computation or closed-loop interpolation. Its front-end delivers raw angle data at 1 MHz in open-loop fashion, enabling deterministic latency as low as 8 µs at constant speed.

Digital filtering uses a configurable first-order transfer function (H(s) = 1/(τs + 1)) with τ ranging from 64 µs to 16 ms, yielding cutoff frequencies from 6 kHz down to 23 Hz. This allows real-time trade-offs between noise suppression (e.g., 0.004° RMS at 16 ms) and dynamic response (e.g., 260 ms full settling time).

Key Specifications

Pinout & Package

MA330GQ-Z is housed in a thermally enhanced QFN-16 (3 mm × 3 mm) package with exposed thermal pad recommended for grounding. Pin functions are validated per MPS datasheet Rev. 1.1 (2022), including dedicated ABZ (A/B/Z), UVW (U/V/W), SPI (MOSI/MISO/SCLK/CS), and diagnostic (MGH/MGL) terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution magnetic angle sensing applications.

Compared with AS5048B-HTSP and TLE5012BE1000, the MA330GQ-Z uniquely integrates ABZ, UVW, and programmable magnetic diagnostics in a single QFN-16 package with on-chip NVM-reducing system-level component count, PCB area, and calibration overhead in industrial BLDC servo designs.

Availability

MA330GQ-Z is available at Aetrix Electronics and suitable for brushless DC motor servo drives, motor commutation systems, and robotics applications requiring stable component supply, extended temperature operation (-40°C to +125°C), and long-term lifecycle continuity.

Supply support for MA330GQ-Z 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management and sensing solutions, with design centers in the US, China, and Taiwan.

The MagAlpha® family-including the MA330-is engineered specifically for contactless angular position sensing in demanding motion control applications, emphasizing resolution, speed, magnetic robustness, and integration of motor interface outputs.

FAQ

What is the maximum rotational speed supported by the MA330GQ-Z?

The MA330GQ-Z supports continuous operation up to 60,000 rpm. This capability is enabled by its 1 MHz internal angle sampling rate and low-latency digital architecture, which maintains 14-bit resolution and <10 µs propagation delay even at peak speed-verified under 45–100 mT magnetic field conditions per datasheet Rev. 1.1.

How does the MA330GQ-Z handle side-shaft (off-axis) magnet mounting?

The MA330GQ-Z compensates for side-shaft nonlinearity using bias current trimming (BCT, ETX, ETY registers), which adjusts Hall sensor offsets to linearize the field-angle relationship. This eliminates external calibration hardware and enables accurate position feedback in space-constrained motor housings where end-of-shaft mounting is impractical.

Can the ABZ and UVW outputs operate simultaneously?

Yes-ABZ (A/B/Z) and UVW (U/V/W) outputs are fully independent and active concurrently. The ABZ interface provides high-frequency quadrature for velocity estimation and index positioning, while UVW delivers synchronized commutation signals; both derive from the same absolute angle core with no timing conflict or resource contention.

What is the purpose of the MGL and MGH pins?

MGL and MGH are open-drain digital flags indicating whether the sensed magnetic field strength falls below (MGL) or exceeds (MGHT) user-programmed thresholds. These signals enable real-time diagnostics-for example, detecting magnet detachment in robotic joints or axial drift in motor assemblies-without host MCU intervention.

Is the zero-angle position stored permanently after programming?

Yes-the zero-angle offset (Z[15:0]) is written to on-chip non-volatile memory and automatically reloaded at power-on. The NVM is rated for 1,000 write cycles at 25°C, and each write requires a 20 ms delay (tnvm) to complete; factory default is 0°, corresponding to Z = 65536 decimal.

Does the MA330GQ-Z require external decoupling capacitors?

Yes-a 1 µF ceramic capacitor must be placed close to the VDD pin (pin 13) with a low-impedance path to GND (pin 8). This is specified in the Electrical Mounting section of the datasheet to suppress supply noise and ensure stable operation across the full -40°C to +125°C temperature range and 0–60,000 rpm speed range.

What SPI modes does the MA330GQ-Z support?

The MA330GQ-Z auto-detects and supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1). No configuration is needed-the device identifies the idle state of SCLK and samples on the appropriate edge. Maximum SCLK frequency is 25 MHz, with timing parameters fully characterized in the datasheet Rev. 1.1.