Monolithic Power Systems Inc. MA704GQ-P

Overview

MA704GQ-P from Monolithic Power Systems is a 10-bit contactless absolute angle sensor using Spinaxis™ phase-detection Hall technology to measure in-plane magnetic field direction. It delivers ABZ quadrature (programmable 1–64 pulses/turn), 10-bit PWM, and SPI/SSI digital outputs with 850–1100 kHz refresh rate, 0.7° INL at 25°C, and operation up to 60,000 rpm - deployed in automotive throttle position sensing and robotic joint encoders.

For engineers reviewing the MA704GQ-P datasheet, MA704GQ-P pinout, MA704GQ-P application, or MA704GQ-P equivalent, this page provides verified technical context on magnetic field detection thresholds, ABZ jitter performance at high RPM, PWM frequency stability across temperature, and register-programmable zero-angle alignment for end-of-shaft and side-shaft mounting configurations.

Technical Context

The MA704 employs a 2D Hall front-end with time-to-digital conversion for open-loop angle digitization-eliminating arctangent computation or feedback interpolators. Its Spinaxis™ method directly measures sinusoidal phase shift relative to a reference clock, yielding deterministic latency of 8–10 µs and no added filter delay under steady-state rotation.

Digital conditioning includes a configurable low-pass filter (Fcutoff = 2970 Hz, τ = 0.38/Fcutoff) and on-chip NVM storing zero-angle offset, ABZ settings, and dual magnetic field thresholds (MGLT/MGHT). Field strength detection supports axial movement diagnostics and magnet health monitoring via dedicated MGL/MGH flag outputs.

Key Specifications

Pinout & Package

MA704GQ-P is housed in a QFN-16 (3 mm × 3 mm) package with exposed thermal pad recommended for grounding. Pin functions are validated per MPS MA704 Rev. 1.1 datasheet, Section 8.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS5048A-BSOT and TLE5012BE1000, the MA704GQ-P uniquely balances 10-bit precision, triple-output flexibility (SPI/ABZ/PWM), on-chip field diagnostics, and compact QFN packaging-making it optimal for cost-sensitive industrial and robotics applications requiring rapid deployment and mechanical mounting versatility.

Availability

MA704GQ-P is available at Aetrix Electronics and suitable for automotive throttle position sensing, industrial servo motor feedback, and robotics joint encoders requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MA704GQ-P 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® product line delivers contactless magnetic angle sensors optimized for dynamic, high-reliability applications including automotive, industrial automation, and robotics-emphasizing robustness, programmability, and multi-interface flexibility.

FAQ

What is the maximum rotational speed supported by the MA704GQ-P?

The MA704GQ-P supports rotational speeds up to 60,000 rpm while maintaining full 10-bit resolution and ABZ output integrity. This capability is enabled by its 1 MHz internal sampling rate and deterministic 8–10 µs latency, verified across the full -40°C to +125°C operating range and 30–60 mT magnetic field conditions.

Does the MA704GQ-P require external calibration for side-shaft mounting?

No external calibration is required. The MA704GQ-P includes on-chip bias current trimming (BCT, ETX, ETY registers) and programmable zero-angle offset (Z[15:0]) to compensate for field distortion in side-shaft configurations. Factory default settings support immediate operation, and fine-tuning can be performed via SPI without additional hardware.

How does the magnetic field strength detection work, and what are its practical uses?

The MA704GQ-P monitors field amplitude via dedicated MGL and MGH open-drain outputs, triggered when sensed field falls below MGLT or rises above MGHT thresholds (programmable in 3-bit steps). This enables real-time diagnostics for magnet detachment, axial drift, or demagnetization-critical for functional safety in automotive and medical applications.

Can the ABZ output be configured for different pulse counts per turn, and how is this done?

Yes, ABZ pulses per turn (PPT) are fully programmable from 1 to 64 via SPI register writes to addresses 0x4 and 0x5. The setting persists in on-chip NVM and loads automatically at power-on. Each increment adjusts edge count per mechanical revolution, allowing precise matching to controller expectations without changing firmware or external logic.

Is the exposed thermal pad on the QFN-16 package required to be connected to ground?

While the MA704GQ-P will function with the exposed pad floating, MPS recommends connecting it to GND for optimal electrical noise immunity, thermal dissipation (θJC = 12 °C/W), and mechanical stability. Doing so reduces junction temperature rise by ~15°C under continuous 12 mA operation and improves signal integrity for high-speed ABZ and SPI interfaces.

What is the difference between the SPI and SSI interfaces on the MA704GQ-P?

SPI supports full bidirectional communication (angle read, register read/write) at up to 25 MHz, while SSI is receive-only for angle data via two-wire (SSCK/SSD) with a non-standard low-idle clock and mandatory dummy rising edge. SSI cannot access configuration registers and requires custom master timing-unlike standard SSI protocols.