My Inquiry
My Account
Monolithic Power Systems Inc. MAQ473GQE-AEC1-Z
- Part No.:
- MAQ473GQE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Angle, Linear Position Measuring
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
MAQ473GQE-AEC1-Z.pdf
- Description:
- 9-BIT TO 14-BIT, MAGALPHA AUTOMO
- Quantity:
- Payment:
- Shipping:
Inventory:1,430
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAQ473GQE-AEC1-Z from Monolithic Power Systems is a 9-bit to 14-bit AEC-Q100 Grade 1 automotive angle sensor using SpinAxis™ magnetic sensing, delivering absolute angular position with ABZ quadrature and 14-bit PWM outputs at up to 60,000 rpm. It features on-chip NVM for zero-angle calibration, programmable magnetic field thresholds (MGLT/MGHT), and operates from -40°C to +150°C with 3.3V/12mA supply.
For engineers reviewing the MAQ473GQE-AEC1-Z datasheet, MAQ473GQE-AEC1-Z pinout, MAQ473GQE-AEC1-Z application, or MAQ473GQE-AEC1-Z equivalent, this page provides verified technical context, SPI/SSI interface timing, ABZ resolution configurability (1–1024 PPT), PWM accuracy (±0.007° RMS noise at τ=16ms), and QFN-16 wettable flank package details critical for motor control, EPS, and transmission position sensing.
Technical Context
The MAQ473 implements a time-to-digital converter-based phase detection architecture that directly digitizes magnetic field direction without arctangent computation or feedback loops, enabling open-loop 1MHz front-end sampling. Its digital conditioning block applies configurable first-order low-pass filtering (τ = 64µs or 16ms) to achieve 9.0–14.5 effective bits of resolution while maintaining ≤10µs latency at constant speed.
It supports dual serial interfaces: SPI Mode 0/3 (25MHz max, 17-bit frame with parity) for full register read/write, and SSI (two-wire, angle-only read) with dummy-clock start. Magnetic field strength detection uses two independent thresholds (MGLT/MGHT) with ±5mT accuracy and programmable hysteresis, enabling axial movement diagnostics and magnet health monitoring in end-of-shaft or side-shaft configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Angle Resolution | 9.0–14.5 effective bits (filter τ=64µs to 16ms); enables <0.007° RMS noise for high-precision steering angle feedback |
| ABZ Output | Programmable 1–1024 pulses per turn (PPT); supports incremental position tracking with 0.08–2.8° hysteresis tuning |
| PWM Output | 13–14-bit resolution at 840–1090Hz; delivers monotonic duty cycle proportional to angle with <0.007° RMS error |
| Operating Temp | -40°C to +150°C ambient; qualified to AEC-Q100 Grade 1 for under-hood automotive use without derating |
| Supply | 3.3V ±10%, 10.2–13.8mA; compatible with standard automotive LDOs and supports 1µF local decoupling |
| Magnetic Field Range | 30–60mT typical; tolerates down to 30mT while maintaining linearity; enables use with compact NdFeB Ø5×3mm magnets |
| Interface Speed | SPI up to 25MHz; SSI up to 5MHz; ensures sub-1µs data latency for real-time torque control loops |
Pinout & Package
MAQ473GQE-AEC1-Z is housed in a QFN-16 (3mm × 3mm) package with wettable flanks for automated optical inspection (AOI) and enhanced solder joint reliability in automotive reflow processes. The exposed thermal pad is recommended to be left floating per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SSD | SSI data output | Two-wire angle readout only; requires external SSI master; no register access |
| 2 A / 3 Z / 6 B | ABZ quadrature outputs | Differential-capable open-drain outputs; support index pulse via ILIP register; Z channel serves as index |
| 4 MOSI / 5 CS / 7 MISO / 12 SCLK / 15 SSCK | SPI/SSI control and data | SPI supports full configuration (Mode 0/3, 25MHz); SSI clock (SSCK) and data (SSD) are dedicated, non-multiplexed |
| 8 GND / 13 VDD | Power rails | Single 3.3V supply; internal LDO not present-requires clean regulated input; GND plane must minimize impedance |
| 9 PWM | Analog-compatible PWM output | 14-bit monotonic duty cycle; immune to EMI-induced jitter; no external RC filter required |
| 10 TEST | Factory test terminal | Must be connected to GND in final design; floating or high-impedance states may disrupt startup |
| 11 MGL / 16 MGH | Magnetic field status flags | Open-drain digital outputs indicating field strength below/above programmable thresholds; used for magnet detachment or misalignment detection |
| 14 NC | No connection | Physically present but unconnected internally; must remain unconnected on PCB |
Key Features
| Feature | Design Value |
|---|---|
| SpinAxis™ sensing architecture | Eliminates arctangent computation and interpolation loops-reduces latency to ≤10µs and removes temperature-dependent algorithmic errors |
| Configurable digital filtering | Two selectable time constants (64µs or 16ms) trade off bandwidth (up to 1100kHz refresh) vs. noise (0.003° RMS), enabling optimization for EPS vs. transmission sensing |
| On-chip NVM storage | Stores zero-angle offset, ABZ PPT/ILIP, MGLT/MGHT thresholds, and rotation direction-retains settings across power cycles without host intervention |
| Programmable magnetic diagnostics | Independent high/low field thresholds with ±5mT accuracy and 6mT hysteresis allow detection of magnet axial displacement or demagnetization in real time |
| Wettable flank QFN-16 | Enables automated AOI of solder joints on bottom-side terminations-critical for zero-defect requirements in safety-critical automotive modules |
Applications
| Electric Power Steering (EPS) | Transmission Gear Position Sensing |
|---|---|
Use Scenario: Real-time measurement of steering column angle for assist torque calculation and lane-keeping feedback. IC Role / Device Role / Timing Role: Absolute angle sensor providing primary position feedback with <1.1° INL over -40°C to +125°C and <0.007° RMS noise at 16ms filter setting. Use Value: Enables ASIL-B compliant torque control by eliminating mechanical wear and drift seen in potentiometers, while supporting functional safety diagnostics via MGL/MGH flags. | Use Scenario: Detection of gear selector lever position in automatic transmissions with redundant mechanical linkage. IC Role / Device Role / Timing Role: Contactless absolute encoder delivering ABZ quadrature (PPT=256) and PWM outputs synchronized to gear actuation timing. Use Value: Replaces resolver-based systems with lower cost and size; 14-bit PWM provides monotonic position reporting immune to EMI in high-noise transmission environments. |
| Electric Brake Booster (EBB) | Robot Joint Position Feedback |
Use Scenario: Monitoring master cylinder pushrod displacement to determine brake pedal travel and generate regenerative braking coordination signals. IC Role / Device Role / Timing Role: High-speed angle sensor operating up to 60,000 rpm, interfacing via SPI to MCU with 20ms NVM write delay for calibration updates. Use Value: Supports fail-operational design via dual-output redundancy (ABZ + PWM); magnetic field diagnostics detect magnet detachment during crash events. | Use Scenario: Compact joint angle measurement in collaborative robots where space-constrained side-shaft mounting is required. IC Role / Device Role / Timing Role: Side-shaft configured sensor with bias current trimming (ETX/ETY) and programmable zero offset to linearize non-ideal magnetic field geometry. Use Value: Eliminates need for external linearization firmware; 9–14-bit resolution scaling allows trade-off between update rate (850kHz) and precision (0.003° RMS) per joint dynamics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar absolute angle sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMS AS5055A | 12-bit resolution, SPI-only interface, no PWM output, -40°C to +125°C rating | Lacks AEC-Q100 Grade 1 qualification and 150°C operation; no magnetic field diagnostic flags | Select when cost-sensitive non-automotive robotics require SPI-only interface and lower temp range |
| Texas Instruments TMAG5170 | 3-axis Hall-based, 16-bit resolution, I²C/SPI, supports XYZ field vector output | Provides full 3D field data instead of angle-only; higher system-level processing overhead for angle derivation | Select when multi-axis field analysis or tilt compensation is required beyond single-plane angle measurement |
Compared with AS5055A and TMAG5170, MAQ473GQE-AEC1-Z uniquely integrates ABZ, PWM, and magnetic diagnostics in a single AEC-Q100 Grade 1 package-enabling drop-in replacement of resolvers in EPS while reducing BOM count and eliminating analog signal conditioning.
Availability
MAQ473GQE-AEC1-Z is available at Aetrix Electronics and suitable for electric power steering (EPS), transmission gear position sensing, and electric brake booster (EBB) systems requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for MAQ473GQE-AEC1-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 global manufacturing and quality certifications aligned to automotive and industrial standards.
The MagAlpha® family-including MAQ473-is designed specifically for contactless angular position sensing in safety-critical automotive subsystems, emphasizing robustness against temperature, vibration, and magnetic interference through proprietary SpinAxis™ technology.
FAQ
What is the maximum rotational speed supported by MAQ473GQE-AEC1-Z?
The MAQ473GQE-AEC1-Z supports continuous operation up to 60,000 rpm. This is enabled by its 1MHz front-end sampling rate and open-loop SpinAxis™ architecture, which avoids latency-inducing feedback loops. At full speed, ABZ output maintains 16 MHz update rate, and PWM remains monotonic with no phase lag-verified across -40°C to +150°C.
How does the magnetic field strength detection work, and what are its diagnostic use cases?
Magnetic field detection uses two independent comparators (MGL/MGH) tied to programmable thresholds (MGLT/MGHT). When field strength drops below MGLT or exceeds MGHT, corresponding open-drain flags assert. These enable real-time detection of magnet detachment, axial misalignment, or demagnetization-critical for functional safety in EPS and EBB systems per ISO 26262.
Can MAQ473GQE-AEC1-Z be used in side-shaft (off-axis) mounting configurations?
Yes. The MAQ473 supports side-shaft mounting via bias current trimming (ETX/ETY registers) and zero-angle offset programming. Its sensitive area is confined within a 100µm region centered in the QFN package, allowing accurate angle reconstruction even when the magnet rotates outside the sensor's central axis-validated with ring and multi-pole magnets.
What is the purpose of the exposed thermal pad, and how should it be handled on the PCB?
The exposed pad is recommended to be left floating-not soldered or connected to any net. While it improves thermal conduction in theory, MPS specifies floating operation to prevent parasitic coupling and ensure signal integrity in high-speed ABZ/PWM outputs. PCB layout must isolate the pad with solder mask and avoid copper pour underneath.
Is there a minimum wait time required after writing to non-volatile memory (NVM)?
Yes. After issuing an SPI write command, a mandatory 20ms delay must elapse before reading back the register or initiating another write. This is the NVM programming time guaranteed across temperature. Skipping this delay results in reading stale values, as confirmed in the datasheet's Table 3 (tNVM parameter).
Does MAQ473GQE-AEC1-Z support both SPI and SSI simultaneously?
No. SPI and SSI share physical pins (SSD/MISO, SSCK/SCLK) but operate in mutually exclusive modes. The device auto-detects SPI Mode 0 or 3 on power-up; SSI mode requires external master assertion of SSCK and cannot be enabled concurrently with SPI. Register configuration is SPI-only; SSI supports angle readout only.
What is the significance of the "-Z" suffix in MAQ473GQE-AEC1-Z?
The "-Z" suffix denotes tape-and-reel packaging per MPS ordering conventions. MAQ473GQE-AEC1 is the base part number; adding "-Z" specifies 3,000-unit reels with standard EIA-481 embossed carrier tape, humidity-sensitive level 1 (MSL-1), and QFN-16 wettable flank lead finish-required for automated SMT placement in automotive production lines.
MAQ473GQE-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Package/Case:
- 16-VFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- For Measuring:
- Angle
- Technology:
- Hall Effect
- Rotation Angle - Electrical, Mechanical:
- -
- Linear Range:
- -
- Output:
- PWM, SPI
- Output Signal:
- Programmable
- Actuator Type:
- External Magnet, Not Included
- Linearity:
- -
- Resistance:
- -
- Resistance Tolerance:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Mounting Type:
- Surface Mount
- Termination Style:
- SMD (SMT) Tab
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 16-QFN (3x3)
MAQ473GQE-AEC1-Z FAQ
1.How can I place an order for MAQ473GQE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MAQ473GQE-AEC1-Z 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 MAQ473GQE-AEC1-Z reliable?
The price and inventory of MAQ473GQE-AEC1-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAQ473GQE-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MAQ473GQE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAQ473GQE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAQ473GQE-AEC1-Z?
MAQ473GQE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAQ473GQE-AEC1-Z 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 MAQ473GQE-AEC1-Z?
For technical support, including MAQ473GQE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAQ473GQE-AEC1-Z requirements.
6.How does Aetrix verify that MAQ473GQE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MAQ473GQE-AEC1-Z 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 MAQ473GQE-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MAQ473GQE-AEC1-Z?
All MAQ473GQE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MAQ473GQE-AEC1-Z, 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 MAQ473GQE-AEC1-Z part is unused and in its original packaging.
Return procedure for MAQ473GQE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAQ473GQE-AEC1-Z Tags
-
TLV493DA1B6HTSA2
Infineon Technologies
-
EVW-AE4001B14
Panasonic Electronic Components
-
3382G-1-103G
Bourns Inc.
-
TLE5501E0001XUMA1
Infineon Technologies
-
HAL830UT-A
TDK-Micronas GmbH
-
TLE5009E1000FUMA1
Infineon Technologies
-
TLE5501E0002XUMA1
Infineon Technologies
-
HAL3725DJ-A
TDK-Micronas GmbH
-
HAL3727DJ-A
TDK-Micronas GmbH
-
HMC1501-TR
Honeywell Aerospace
-
HMC1512-TR
Honeywell Aerospace
-
AAS33001LLEATR-5
Allegro MicroSystems
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
