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NXP Semiconductors MMA5224AKW
- Part No.:
- MMA5224AKW
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA5224AKW.pdf
- Description:
- ACCELEROMETER 240G SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,318
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Product details
Overview
MMA5224AKW from NXP Semiconductors (formerly Freescale) is an X-axis satellite accelerometer with PSI5 Version 1.3 asynchronous mode interface, ±240g full-scale range, 400 Hz 3-pole low-pass filter, and AEC-Q100 Grade 1 qualification (-40°C to +125°C). It delivers 10-bit digital output at 125 kBaud for airbag crash detection systems.
For engineers reviewing the MMA5224AKW datasheet, MMA5224AKW pinout, MMA5224AKW application, or MMA5224AKW equivalent, this page provides verified technical context, exact pin functions, real-world automotive use cases, and validated alternative options for PSI5 inertial sensing in safety-critical vehicle subsystems.
Technical Context
The MMA5224AKW implements an overdamped MEMS g-cell with natural frequency of 26 kHz and damping ratio of 1.26–3.60, paired with a ΣΔ converter and 3rd-order sinc decimation filter. Its signal chain includes programmable high-pass filtering (0.04/0.1/0.3 Hz), offset cancellation with dual-stage startup, and internal voltage regulation via VBUF/VREG/VREGA rails.
PSI5 communication operates at 125 kBaud with even parity error detection and 10-bit data frames. The device supports fast startup, output rate limiting, and micro-cut resilience through integrated capacitor monitoring on VBUF, VREG, and VREGA pins - all synchronized to a factory-trimmed 4 MHz oscillator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±240g - defines maximum measurable acceleration before clipping; matched to front/side airbag deployment thresholds |
| PSI5 Interface | Version 1.3 asynchronous mode, 125 kBaud - enables deterministic timing and error-checked serial transmission over single-wire bus |
| Low-Pass Filter | 400 Hz, 3-pole - suppresses high-frequency noise while preserving crash pulse fidelity up to ~150 Hz |
| Output Resolution | 10-bit digital output - provides 480 LSB/g sensitivity and ±480 LSB range for precise acceleration quantization |
| Operating Temperature | -40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and passenger compartment placement |
| Internal Oscillator | 4 MHz ±5% - drives all timing-critical DSP blocks including sinc filter, HPF, and offset cancellation stages |
| Supply Architecture | VCC-powered with internal VBUF/VREG/VREGA regulators - isolates analog/digital domains and improves EMC immunity |
Pinout & Package
Pb-free 16-pin QFN package (Case 2086-01, 6 mm × 6 mm), exposed thermal pad internally connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | PSI5 Power & Data Line Supply | Primary input for PSI5 bus power; requires external decoupling capacitor to VSS per Figure 1 |
| IDATA | PSI5 Response Current Output | Modulates current on PSI5 line for digital response; connects through 82Ω resistor to VCC |
| VBUF | Buffer Regulator Input | Supplies isolated analog/digital regulators; must be decoupled to VSS with ≥500 nF ceramic capacitor |
| VREG | Digital Supply Rail | Provides 2.5 V ±75 mV to digital logic and SPI interface; requires 1 μF capacitor to VSS |
| VREGA | Analog Supply Rail | Provides 2.5 V ±75 mV to analog front-end and ΣΔ converter; requires 1 μF capacitor to VSSA |
| VSS / VSSA | Digital & Analog Ground Returns | Separate ground paths prevent coupling between digital switching noise and analog signal integrity |
| SCLK / DIN / DOUT / CS / TEST | SPI Test Interface | Reserved for factory test only; must be grounded or left unconnected in production applications |
| NC (Pins 5 & 15) | No Connect | Not bonded; must remain unconnected on PCB to avoid parasitic coupling or ESD path disruption |
Key Features
| Feature | Design Value |
|---|---|
| PSI5 Asynchronous Mode Compliance | Fully compatible with PSI5-A10P-228/1L specification, enabling plug-and-play integration into existing automotive PSI5 networks |
| Overdamped g-cell Architecture | Damping ratio 1.26–3.60 ensures minimal overshoot and stable step response during crash events without external compensation |
| Integrated Capacitor Monitoring | Automatically detects open-circuit conditions on VBUF/VREG/VREGA capacitors and forces reset to prevent undervoltage operation |
| Fast Startup High-Pass Filter | 0.04 Hz HPF option enables rapid stabilization (<100 ms) after power-on while rejecting DC drift in crash detection |
| Self-Test Capability | Hardware-activated self-test generates known acceleration output (56 LSB @ ±240g range) for functional verification without mechanical stimulus |
Applications
| Front Airbag Crash Detection | Side Impact Sensor Module |
|---|---|
Use Scenario: Mounted on vehicle firewall or instrument panel to detect frontal collision deceleration exceeding 20g within 10–30 ms. IC Role / Device Role / Timing Role: Primary X-axis acceleration transducer feeding PSI5 data stream to airbag control unit (ACU) with <1 ms latency. Use Value: ±240g range and 400 Hz LPF ensure accurate capture of crash pulses while rejecting road noise and engine vibration. | Use Scenario: Integrated into door pillar or B-pillar module to sense lateral acceleration during side collisions or rollover events. IC Role / Device Role / Timing Role: Satellite accelerometer providing time-synchronized PSI5 output to central safety controller for multi-point impact analysis. Use Value: AEC-Q100 Grade 1 rating and overdamped response guarantee reliable operation in high-EMI cabin environments. |
| Rollover Detection System | Occupant Classification Sensor |
Use Scenario: Mounted near vehicle center of gravity to monitor angular acceleration and lateral G-forces during sharp turns or loss-of-control maneuvers. IC Role / Device Role / Timing Role: Low-latency X-axis inertial reference supporting real-time roll angle estimation using sensor fusion algorithms. Use Value: 10-bit resolution and 1 μs interpolation enable sub-degree angular accuracy when combined with gyroscope data. | Use Scenario: Embedded in seat structure to detect occupant presence, position, and weight class for adaptive airbag deployment logic. IC Role / Device Role / Timing Role: Static and dynamic acceleration measurement node delivering calibrated PSI5 output to occupant classification ECU. Use Value: Offset cancellation with 0.04 Hz HPF allows stable baseline tracking over temperature and time without manual recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PSI5 inertial sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMA5212AKW | ±120g full-scale range, lower sensitivity (4 LSB/g), identical PSI5 interface and package | Better suited for lower-g crash scenarios where higher resolution is needed below 100g | Select when system-level crash pulse modeling indicates peak deceleration remains under ±120g |
| MMA5248AKW | ±480g full-scale range, reduced sensitivity (1 LSB/g), same architecture and qualification | Required for high-speed frontal impact or heavy-vehicle applications with extreme deceleration profiles | Choose when crash testing shows >±240g peaks or when future platform scalability demands headroom |
Compared with MMA5212AKW and MMA5248AKW, the MMA5224AKW strikes optimal balance between resolution and headroom for mid-tier passenger vehicles - delivering 2 LSB/g sensitivity across ±240g while maintaining compatibility with existing PSI5 infrastructure and layout constraints.
Availability
MMA5224AKW is available at Aetrix Electronics and suitable for front airbag crash detection, side impact sensing, rollover detection, and occupant classification systems requiring stable component supply across automotive production lifecycles.
Supply support for MMA5224AKW 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets.
The MMA5224AKW belongs to NXP's Xtrinsic inertial sensor family designed specifically for PSI5-based automotive safety systems, emphasizing functional safety, EMC robustness, and AEC-Q100 compliance from concept through production.
FAQ
What is the full-scale range and sensitivity of the MMA5224AKW?
The MMA5224AKW has a ±240g full-scale range and delivers 2 LSB/g sensitivity in 10-bit output mode. This yields a total output range of ±480 LSB, calibrated across -40°C to +125°C. Sensitivity is factory-trimmed and specified with ±5% total error including non-linearity and temperature drift. The MMA5224AKW maintains this performance without external calibration due to integrated offset cancellation and self-test features.
How does the MMA5224AKW interface with a PSI5 host controller?
The MMA5224AKW uses a two-wire PSI5 Version 1.3 asynchronous interface: VCC supplies power and carries sync pulses, while IDATA returns modulated current responses. It operates at 125 kBaud with even parity, 10-bit data frames, and supports both standard and extended message formats. The MMA5224AKW requires no external clock and automatically synchronizes to host sync pulses - eliminating timing skew issues common in multi-sensor PSI5 networks.
What are the key power supply requirements for the MMA5224AKW?
The MMA5224AKW requires a 4.2–17.0 V DC supply on VCC, with mandatory external capacitors: 2.2 nF on VCC, 1 μF on VREG, 1 μF on VREGA, and ≥500 nF on VBUF. All regulators feature undervoltage detection (e.g., VCC UV threshold = 3.4–4.0 V), and capacitor monitoring ensures fail-safe reset if any external capacitor is missing or degraded. The MMA5224AKW draws 4–8 mA quiescent current and up to 30 mA during modulation.
Does the MMA5224AKW support self-test and diagnostic functions?
Yes, the MMA5224AKW includes hardware self-test that injects a known electrostatic force to produce 56 LSB output at ±240g range. It also features continuous offset monitoring (±66 LSB limit), CRC-verified OTP memory, and status flags for internal data errors (IDEN_B), factory data faults (IDEF_B), and offset violations (OFF_B). All diagnostics are accessible via PSI5 read commands - no SPI connection required in final application. The MMA5224AKW reports faults in real time without interrupting normal operation.
What is the package type and thermal performance of the MMA5224AKW?
The MMA5224AKW uses a Pb-free 16-pin QFN package (Case 2086-01, 6 mm × 6 mm) with exposed die attach pad connected to VSS. Its thermal resistance θJC is 2.5°C/W, enabling direct mounting to copper pour for efficient heat dissipation. The device is qualified to AEC-Q100 Revision G Grade 1, with junction temperature rated from -40°C to +150°C and storage range up to +125°C. The MMA5224AKW maintains full functionality across this range with built-in thermal compensation for offset and sensitivity.
MMA5224AKW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA
- Package/Case:
- 16-QFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- Type:
- Digital
- Axis:
- X
- Acceleration Range:
- ±240g
- Sensitivity (LSB/g):
- 2
- Sensitivity (mV/g):
- -
- Bandwidth:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 4.2V ~ 17V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (6x6)
MMA5224AKW FAQ
1.How can I place an order for MMA5224AKW through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA5224AKW 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 MMA5224AKW reliable?
The price and inventory of MMA5224AKW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA5224AKW is usually 5 days.
3.What payment methods are accepted for MMA5224AKW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA5224AKW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA5224AKW?
MMA5224AKW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA5224AKW 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 MMA5224AKW?
For technical support, including MMA5224AKW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA5224AKW requirements.
6.How does Aetrix verify that MMA5224AKW is sourced from the original manufacturer or authorized distributors?
All MMA5224AKW 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 MMA5224AKW meets industry standards.
7.What is the process for return or replacement of MMA5224AKW?
All MMA5224AKW units undergo pre-shipment inspection (PSI). If there is an issue with MMA5224AKW, 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 MMA5224AKW part is unused and in its original packaging.
Return procedure for MMA5224AKW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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