Monolithic Power Systems Inc. MA302GQ-Z

Overview

MA302GQ-Z from Monolithic Power Systems is a 12-bit contactless absolute angle sensor with integrated ABZ quadrature and UVW commutation outputs, designed for real-time motor shaft position sensing in high-speed rotating systems up to 60,000 rpm. It delivers 11.8-bit effective resolution (3σ), ±0.7° INL at 25°C, and operates from -40°C to +125°C on 3.3V supply drawing 11.7 mA typical current.

For engineers reviewing the MA302GQ-Z datasheet, MA302GQ-Z pinout, MA302GQ-Z application, or MA302GQ-Z equivalent, this page provides verified technical context, validated pin functions, confirmed magnetic field detection thresholds (±5 mT accuracy), ABZ programmability (1–256 pulses/turn), and UVW pole pair emulation (1–8 NPP) - all critical for BLDC servo, motor commutation, and robotics motion control design.

Technical Context

The MA302 employs Spinaxis™ phase-detection architecture-measuring magnetic field direction via time-to-digital conversion of sinusoidal zero-crossings-eliminating arctangent computation and closed-loop interpolation. Its front-end digitizes angle at 1 MHz open-loop with no latency under steady-state conditions.

Digital conditioning includes a configurable low-pass filter (fc = 390 Hz) and on-chip non-volatile memory storing zero-angle offset, ABZ pulse count, UVW pole pairs, and dual magnetic field thresholds (MGLT/MGHT). Field strength detection enables axial movement sensing and diagnostic flagging via dedicated MGL/MGH digital outputs.

Key Specifications

Pinout & Package

MA302GQ-Z is housed in a thermally enhanced QFN-16 (3 mm × 3 mm) package with exposed thermal pad recommended to be connected to GND for optimal electrical, thermal, and mechanical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar absolute angle sensing applications.

Compared with AS5048B-HTSP and TLE5012BE1000, MA302GQ-Z uniquely integrates ABZ, UVW, and magnetic diagnostics in a 3×3 mm QFN - enabling single-chip motor commutation, position feedback, and health monitoring without external signal conditioning or safety hardware.

Availability

MA302GQ-Z is available at Aetrix Electronics and suitable for brushless DC motor commutation, high-speed servo position feedback, motor health diagnostics, and side-shaft rotary encoder replacement requiring stable component supply across automotive, industrial automation, and robotics production programs.

Supply support for MA302GQ-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 motion sensing solutions, with a focus on energy efficiency, integration, and reliability.

The MagAlpha product line delivers contactless angle sensing ICs optimized for motor control, robotics, and industrial automation - combining high-resolution magnetic sensing, multi-format outputs, and on-chip configurability in compact packages.

FAQ

What is the maximum rotational speed supported by the MA302GQ-Z?

The MA302GQ-Z supports continuous operation up to 60,000 rpm. Its 980 kHz refresh rate and 8 µs latency ensure accurate angle capture even at extreme speeds. ABZ jitter remains ≤0.3° up to 60 mT field strength, and UVW output maintains ≤0.3° total jitter across the full speed range.

How does the MA302GQ-Z handle side-shaft (off-axis) mounting configurations?

The MA302GQ-Z compensates for non-linear field-angle mapping in side-shaft setups using on-chip bias current trimming (BCT) and enable bits (ETX/ETY). Users adjust BCT(7:0) to balance X/Y Hall sensitivity, correcting double-sine error curves and achieving <1.1° INL without external calibration firmware.

Can the ABZ output be configured for different pulses-per-turn values?

Yes - the ABZ output supports programmable pulses per turn (PPT) from 1 to 256 via register 4 (PPT[1:0]) and register 5 (PPT[7:2]). This allows precise matching to motor pole count or controller requirements without changing hardware, and index pulse width/position is further adjustable via ILIP[3:0] in register 4.

What is the role of the MGL and MGH pins?

MGL and MGH are open-drain digital outputs indicating whether the sensed magnetic field falls below (MGL) or exceeds (MGH) user-programmed thresholds stored in registers 6 (MGLT/MGHT). They provide real-time diagnostics for magnet detachment, axial drift, or field degradation - each with ±5 mT accuracy and -600 ppm/°C temperature drift.

Does the MA302GQ-Z require external components for basic operation?

Only a 1 µF ceramic decoupling capacitor between VDD and GND is required for stable operation. The QFN-16 package's exposed thermal pad should be connected to GND for optimal thermal and electrical performance, but no external resistors, filters, or level shifters are needed - all pull-up/pull-down resistors and signal conditioning are integrated.

How is zero-angle position calibrated on the MA302GQ-Z?

Zero angle is set by writing a 16-bit complementary value to registers 0 and 1 (Z[7:0], Z[15:8]), calculated as 65536 − (desired_degrees × 182.044). For example, 20° zero requires Z = 61895 (0xF1C7). This value persists in on-chip NVM and loads automatically at power-on, eliminating factory calibration fixtures.

Is the MA302GQ-Z compliant with automotive or industrial environmental standards?

Yes - it operates across -40°C to +125°C, meets RoHS, is lead-free and halogen-free, and features robust magnetic field immunity. While not ASIL-certified, its 1.1° INL over full temperature range, 5000+ hour MTBF, and field diagnostic capability make it suitable for demanding industrial and automotive under-hood applications.