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NXP Semiconductors MMA5224LW
- Part No.:
- MMA5224LW
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-VFLGA
- Datasheet:
-
MMA5224LW.pdf
- Description:
- ACCELEROMETER 240G PCM/SPI 16LGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,686
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Product details
Overview
MMA5224LW from NXP Semiconductors (formerly Freescale) is an X-axis PSI5-compatible inertial sensor designed for automotive airbag crash detection. It delivers ±240g full-scale range, 10-bit digital output with ±2% non-linearity, 400 Hz 3-pole or 4-pole selectable low-pass filtering, and operates across -40°C to +125°C per AEC-Q100 Grade 1.
For engineers reviewing the MMA5224LW datasheet, MMA5224LW pinout, MMA5224LW application, or MMA5224LW equivalent, this page provides verified technical context, PSI5 v1.3 interface timing, daisy-chain capability, self-test response values, and real-world airbag system integration guidance.
Technical Context
The MMA5224LW integrates a high-damping overdamped g-cell (ζ = 1.26, fn = 26 kHz for ±240g range), ΣΔ ADC with SINC filter, and PSI5 v1.3 physical layer compliant encoder. Its internal 4 MHz oscillator drives all timing-critical functions including interpolation to 1 μs resolution and programmable time slots with 0.5 μs granularity.
It supports synchronous and asynchronous PSI5 modes, dual baud rates (125/190.5 kBaud), 8- or 10-bit data length, even parity or 3-bit CRC error detection, and optional external low-side daisy chain switching via BUS_SW pin - enabling multi-sensor networks on a single two-wire bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±240g - matches front/side crash acceleration profiles in passenger vehicles without clipping (gADC_Clip = 928–1218 g). |
| Output Resolution | 10-bit digital output - provides 1 LSB/g sensitivity with ±2% total sensitivity error over temperature. |
| PSI5 Compliance | PSI5 v1.3, P10P-500/3L compatible - ensures interoperability with standard automotive PSI5 controllers and diagnostic tools. |
| Filter Configuration | Selectable 400 Hz 3-pole or 4-pole LPF - suppresses high-frequency noise while preserving crash pulse fidelity for reliable event discrimination. |
| Operating Temperature | -40°C to +125°C (AEC-Q100 Grade 1) - qualified for under-hood and cabin-mounted airbag control units. |
| Supply & Regulation | VCC: 4.2–17.0 V; internally regulated VREG/VREGA: 2.425–2.575 V - enables direct connection to vehicle battery with robust EMC immunity via VBUF buffer regulator. |
| Self-Test Response | 56 LSB (10-bit) at ±240g range - provides deterministic, repeatable verification of signal chain integrity during power-up or diagnostics. |
Pinout & Package
Pb-free 16-pin QFN (6 × 6 mm, case 2086-01) with exposed thermal pad (internally connected to VSS). Pin 17 (PAD) must be soldered to PCB ground plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | PSI5 Power & Data Line Supply | Connects to vehicle battery via series resistor; powers device and carries modulated current response on same wire. |
| IDATA | PSI5 Response Current Output | Modulates current (22–30 mA above quiescent) to encode acceleration data onto VCC line per PSI5 protocol. |
| VBUF | Buffer Regulator Input | Supplies isolated 3.6–4.0 V to internal VREG/VREGA regulators; critical for EMC resilience and supply dropout immunity. |
| BUS_SW | Daisy Chain Gate Driver | Drives external N-channel MOSFET gate to enable VSS_OUT switching in multi-sensor daisy chain configurations. |
| VREG / VREGA | Digital / Analog Supply Outputs | Provide stable 2.425–2.575 V for digital logic and analog signal chain; require 1 μF ceramic decoupling each to VSS/VSSA. |
| VSS / VSSA | Digital / Analog Ground | Separate return paths minimize noise coupling; VSSA must connect to clean analog ground plane near sensor element. |
Key Features
| Feature | Design Value |
|---|---|
| PSI5 v1.3 Programmable Time Slots | 0.5 μs resolution enables precise time-division multiplexing of up to 16 sensors on one bus without collision. |
| Fast Startup High-Pass Filter | Enables rapid stabilization (<100 ms) of DC-coupled output for immediate crash detection after power-on. |
| Internal Sample Rate + Interpolation | 16 μs native sampling interpolated to 1 μs timing resolution - improves synchronization accuracy in multi-node systems. |
| Two-Wire Programming Mode | Allows field reconfiguration (baud rate, data size, CRC) via PSI5 bus without additional programming hardware. |
| Overdamped g-cell (ζ = 1.26) | Eliminates resonance-induced false triggers during high-frequency vibration; maintains flat response up to 3.95 kHz (-3 dB). |
Applications
| Front Airbag Crash Detection | Side Impact Sensor Module |
|---|---|
Use Scenario: Mounted in vehicle dashboard to detect frontal collision events exceeding 10 g within 10–30 ms. IC Role / Device Role / Timing Role: Primary X-axis acceleration transducer feeding PSI5 data stream to airbag control unit (ACU) for real-time crash severity classification. Use Value: ±240g range and 400 Hz LPF ensure accurate capture of peak crash acceleration without ADC saturation or aliasing. | Use Scenario: Integrated into door pillar or seat structure to sense lateral acceleration during side collisions or rollovers. IC Role / Device Role / Timing Role: Satellite accelerometer providing synchronized PSI5 data to ACU alongside central sensors for multi-point impact analysis. Use Value: Daisy chain support via BUS_SW allows cost-effective deployment of multiple side sensors on shared wiring harness. |
| Rollover Detection System | Occupant Position Sensing (OPS) |
Use Scenario: Mounted in roof rail or headliner to detect angular acceleration and vertical G-forces indicative of vehicle rollover. IC Role / Device Role / Timing Role: X-axis inertial reference for roll-rate estimation algorithms; outputs time-stamped PSI5 frames with <1 μs interpolation precision. Use Value: 16 μs internal sample rate + interpolation enables sub-millisecond timing alignment across distributed sensor nodes. | Use Scenario: Used in seat-back modules to monitor occupant proximity and posture via low-level vibration and movement signatures. IC Role / Device Role / Timing Role: Low-noise (1.0 LSB RMS, 1–1 kHz) X-axis motion detector feeding occupancy classification logic in ACU. Use Value: 0.04 Hz HPF option and ±2% non-linearity support reliable static/low-frequency displacement tracking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inertial sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP MMA5224LWR2 | Identical electrical and mechanical specification; differs only in tape-and-reel packaging (vs. tubes for MMA5224LW). | No functional difference; selected for automated SMT assembly lines requiring reel-fed placement. | Direct form-fit-function replacement when volume production requires tape-and-reel delivery. |
| Infineon KMR2200 | PSI5 v1.3 compliant X-axis accelerometer; ±200g range, 12-bit output, no daisy chain BUS_SW pin. | Lacks external low-side switch control; requires dedicated wiring per sensor instead of shared bus topology. | Preferred where higher resolution (12-bit) is prioritized over multi-sensor bus efficiency. |
Compared with MMA5224LW, MMA5224LWR2 offers identical performance in reel format for SMT, while KMR2200 trades daisy chain capability for increased resolution - making MMA5224LW optimal for cost-sensitive, multi-node airbag architectures requiring bus scalability.
Availability
MMA5224LW is available at Aetrix Electronics and suitable for automotive safety systems, airbag control units, and rollover detection modules requiring stable component supply, AEC-Q100 compliance, and PSI5 interface compatibility.
Supply support for MMA5224LW 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 automotive, industrial, and IoT applications, with deep expertise in sensor signal conditioning and functional safety.
The MMA5224LW belongs to NXP's Xtrinsic inertial sensor family, engineered specifically for ASIL-B compliant automotive safety systems requiring high reliability, EMC robustness, and PSI5 bus integration.
FAQ
What is the full-scale range and sensitivity of the MMA5224LW?
The MMA5224LW has a factory-set full-scale range of ±240g and delivers 1 LSB/g sensitivity in 10-bit mode. Total sensitivity error is ±2% over temperature (-40°C to +125°C), and its g-cell damping ratio (ζ = 1.26) ensures overdamped response for crash pulse fidelity. The MMA5224LW achieves this with a sensing element natural frequency of 26 kHz and rolloff at 3.95 kHz (-3 dB).
How does the MMA5224LW implement PSI5 communication?
The MMA5224LW implements PSI5 v1.3 using a two-wire interface (VCC and IDATA) with current modulation. It supports 125/190.5 kBaud, 8-/10-bit data length, even parity or 3-bit CRC, and programmable time slots with 0.5 μs resolution. The MMA5224LW also enables daisy chaining via the BUS_SW pin driving an external low-side FET, allowing up to 16 sensors on one bus.
What are the key power supply requirements for the MMA5224LW?
The MMA5224LW accepts VCC from 4.2 V to 17.0 V, with undervoltage lockout thresholds at 3.40 V (VCC falling). Internally, it generates regulated 2.425–2.575 V supplies for digital (VREG) and analog (VREGA) circuits, buffered by VBUF (3.6–4.0 V). Each regulator requires a 1 μF ceramic capacitor to VSS/VSSA, and VCC needs 2.2 nF + 15 nF decoupling per datasheet Figure 1.
Does the MMA5224LW support self-test and offset cancellation?
Yes, the MMA5224LW includes integrated self-test delivering 56 LSB response in 10-bit mode at ±240g range, and two-stage offset cancellation with configurable HPF corner frequencies (0.04/0.1/0.3 Hz). After cancellation, digital offset is reduced to ±1 LSB (10-bit), and the offset monitor tracks drift within ±66 LSB limits - all verified per AEC-Q100 test conditions.
What package and thermal considerations apply to the MMA5224LW?
The MMA5224LW uses a Pb-free 16-pin QFN (6 × 6 mm, case 2086-01) with exposed die attach pad (Pin 17) internally connected to VSS. This pad must be soldered to a PCB ground plane for thermal dissipation (θJC = 2.5°C/W) and EMI suppression. The package resonance frequency is 100 kHz, well above operational bandwidth, ensuring mechanical stability in high-vibration environments.
MMA5224LW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA
- Package/Case:
- 16-VFLGA
- 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:
- PCM, SPI
- Voltage - Supply:
- 4.2V ~ 17V
- Features:
- Selectable Low Pass Filter
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LGA (3x3)
MMA5224LW FAQ
1.How can I place an order for MMA5224LW through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA5224LW 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 MMA5224LW reliable?
The price and inventory of MMA5224LW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA5224LW is usually 5 days.
3.What payment methods are accepted for MMA5224LW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA5224LW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA5224LW?
MMA5224LW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA5224LW 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 MMA5224LW?
For technical support, including MMA5224LW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA5224LW requirements.
6.How does Aetrix verify that MMA5224LW is sourced from the original manufacturer or authorized distributors?
All MMA5224LW 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 MMA5224LW meets industry standards.
7.What is the process for return or replacement of MMA5224LW?
All MMA5224LW units undergo pre-shipment inspection (PSI). If there is an issue with MMA5224LW, 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 MMA5224LW part is unused and in its original packaging.
Return procedure for MMA5224LW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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