My Inquiry
My Account
NXP Semiconductors MMA5224AKWR2
- Part No.:
- MMA5224AKWR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA5224AKWR2.pdf
- Description:
- ACCELEROMETER 240G SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,629
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMA5224AKWR2 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 MMA5224AKWR2 datasheet, MMA5224AKWR2 pinout, MMA5224AKWR2 application, or MMA5224AKWR2 equivalent, this page provides verified technical context, validated pin functions, confirmed PSI5 timing compliance, and real-world automotive safety use cases - all derived from the official Freescale MMA52xxAKW Rev. 0 datasheet.
Technical Context
The MMA5224AKWR2 implements an overdamped g-cell transducer (ζ = 1.26–3.60, fn = 26 kHz) feeding a sigma-delta modulator, followed by a 3rd-order sinc decimation filter (16:1), 400 Hz LPF, and programmable high-pass filter with fast startup. Its internal oscillator operates at 4 MHz ±5%.
PSI5 communication uses asynchronous mode with 10-bit data, even parity, 125 kBaud nominal bit rate (7.6–8.4 μs/bit), and supports offset cancellation in two stages (tOC1 = 320 ms, tOC2 = 280 ms at 4 MHz). Internal voltage regulation includes VBUF (3.8 V), VREG/VREGA (2.5 V), each monitored for undervoltage reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±240g - calibrated for high-g crash event detection without clipping below 1750g mechanical overload |
| Output Resolution | 10-bit digital output - provides 0.234 LSB/g sensitivity with ≤±2% non-linearity across operating temperature |
| PSI5 Interface | Version 1.3 asynchronous mode, 125 kBaud - enables deterministic response timing and error detection via even parity |
| Filtering | 400 Hz 3-pole LPF + programmable HPF - suppresses high-frequency noise while preserving crash pulse fidelity |
| Supply Regulation | VBUF = 3.8 V, VREG/VREGA = 2.5 V - isolated analog/digital rails with dedicated capacitor monitoring for functional safety |
| Qualification | AEC-Q100 Grade 1 - validated for automotive under-hood operation from -40°C to +125°C ambient |
| Internal Oscillator | 4.0 MHz ±5% - drives all timing-critical DSP blocks including sinc filter, offset cancellation, and PSI5 bit timing |
Pinout & Package
Pb-free 16-pin QFN package (Case 2086-01, 6 mm × 6 mm), thermally enhanced with exposed die attach pad (internally connected to VSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | PSI5 power/data line supply | Connects to external PSI5 bus via series resistor; powers device and carries modulated IDATA signal |
| IDATA | PSI5 current-modulated response | Modulates sink current (IMOD = IIDLE + 22–30 mA) to encode 10-bit acceleration data onto VCC line |
| VBUF | Buffer regulator input | Supplies isolated 3.8 V rail to VREG/VREGA; requires 500–1500 nF decoupling to VSS for EMC immunity |
| VREG / VREGA | Digital/analog supply outputs | VREG (2.5 V) powers logic/DSP; VREGA (2.5 V) powers analog front-end; each requires 1 μF ceramic cap to VSS/VSSA |
| VSS / VSSA | Digital/analog ground returns | Separate ground paths prevent coupling between digital switching noise and analog sensor signals |
| TEST / SCLK / DIN / DOUT / CS | SPI test interface | Reserved for factory test only; must be grounded or left unconnected in production applications |
Key Features
| Feature | Design Value |
|---|---|
| PSI5 Version 1.3 Compliance | Guarantees interoperability with automotive PSI5 master controllers (e.g., Infineon AURIX, NXP S32K) using standardized frame format and error detection |
| Overdamped Transducer | ζ = 1.26–3.60 eliminates resonance-induced ringing during crash events, ensuring clean step-response fidelity |
| Two-Stage Offset Cancellation | Reduces initial digital offset from ±52 LSB to ±1 LSB (0.3 Hz HPF) - critical for zero-g stability in mounting position calibration |
| Capacitor Monitoring | Active open-circuit detection on VBUF/VREG/VREGA pins forces reset if decoupling capacitors are missing or degraded - meets ASIL-B diagnostic coverage |
| Self-Test Capability | Validates sensor functionality by injecting known electrostatic force; produces 56 LSB output for ±240g range - supports ISO 26262 diagnostic routines |
Applications
| Airbag Front Crash Detection | Airbag Side Impact Detection |
|---|---|
Use Scenario: Mounted on vehicle firewall to detect frontal collision deceleration exceeding 20g within 10–30 ms. IC Role / Device Role / Timing Role: Primary X-axis inertial sensor providing 10-bit PSI5 data stream synchronized to master sync pulses; latency < 1 ms from event onset to first valid frame. Use Value: ±240g range avoids saturation during high-speed crashes; 400 Hz LPF rejects road vibration while preserving crash pulse rise time (< 2 ms). | Use Scenario: Integrated into door module to sense lateral acceleration during side collisions or rollover events. IC Role / Device Role / Timing Role: Satellite accelerometer reporting via PSI5 bus to central airbag control unit; supports daisy-chained topology with up to 16 nodes. Use Value: AEC-Q100 Grade 1 ensures reliability in high-temperature door environments; fast HPF startup enables immediate post-impact status reporting. |
| Seat Belt Pretensioner Activation | Occupant Classification System |
Use Scenario: Mounted near B-pillar to trigger pretensioner within 50 ms of crash onset based on deceleration profile. IC Role / Device Role / Timing Role: Safety-critical sensor delivering time-stamped acceleration data to ECU; uses PSI5 even parity to detect transmission errors in noisy harness environments. Use Value: Internal 4 MHz oscillator ensures deterministic timing for offset cancellation and self-test; micro-cut recovery (< 1000 μs) maintains function after brief supply dips. | Use Scenario: Paired with seat pressure sensors to distinguish adult vs. child occupancy using low-level motion signatures. IC Role / Device Role / Timing Role: High-resolution inertial monitor capturing sub-1g occupant movement; outputs interpolated 1 μs sample rate data for dynamic posture analysis. Use Value: 10-bit resolution and ±1 LSB post-offset-cancellation enable detection of subtle weight-shift patterns; low system noise (1.0 LSB RMS) ensures signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inertial sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMA5212AKWR2 | ±120g full-scale range; higher sensitivity (4 LSB/g); lower mechanical overload limit (456g) | Better suited for moderate-deceleration scenarios (e.g., low-speed rear impacts); less margin for high-g crash events | Select when system-level crash modeling confirms peak deceleration remains < 120g; reduces signal processing headroom requirements |
| MMA5248AKWR2 | ±480g full-scale range; lower sensitivity (1 LSB/g); higher g-cell clipping threshold (2300g) | Required for extreme crash conditions (e.g., high-speed barrier tests); trades resolution for extended dynamic range | Choose for applications demanding highest mechanical robustness; verify ECU firmware supports wider LSB/g scaling |
Compared with MMA5212AKWR2 and MMA5248AKWR2, the MMA5224AKWR2 provides optimal balance of range, resolution, and overload margin for mainstream front/side airbag deployment - avoiding saturation in typical crash pulses while retaining sufficient LSB/g for precise thresholding.
Availability
MMA5224AKWR2 is available at Aetrix Electronics and suitable for automotive airbag control units, seat belt pretensioner modules, and occupant classification systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant inertial sensing.
Supply support for MMA5224AKWR2 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 specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in sensor signal conditioning and functional safety.
The MMA52xxAKW family was designed specifically for automotive safety-critical applications requiring PSI5-compliant inertial sensing, featuring integrated diagnostics, AEC-Q100 qualification, and robust EMC performance in harsh vehicle environments.
FAQ
What is the full-scale range and sensitivity of the MMA5224AKWR2?
The MMA5224AKWR2 has a ±240g full-scale range with a nominal sensitivity of 2 LSB/g in 10-bit output mode. Measured sensitivity variation is ≤±2% across temperature and supply voltage, and total sensitivity error (including non-linearity) is ≤±7% over the full operating range. This enables accurate crash pulse capture without saturation in most frontal impact scenarios.
Does the MMA5224AKWR2 support PSI5 Version 1.3 asynchronous mode?
Yes, the MMA5224AKWR2 fully supports PSI5 Version 1.3 asynchronous mode per the official Freescale datasheet. It operates at 125 kBaud nominal bit rate (7.6–8.4 μs/bit), transmits 10-bit data frames with even parity error detection, and complies with PSI5-A10P-228/1L physical layer specifications - ensuring interoperability with standard automotive PSI5 masters.
How does the MMA5224AKWR2 handle power supply monitoring and fault detection?
The MMA5224AKWR2 incorporates independent undervoltage monitors for VCC, VBUF, VREG, and VREGA, each with hysteresis (e.g., VCC UV threshold = 3.4–4.0 V). It also features active capacitor monitoring: VBUF is tested every PSI5 frame, while VREG/VREGA are tested continuously. An open capacitor triggers internal reset - supporting ASIL-B diagnostic requirements per ISO 26262.
What is the purpose of the TEST, SCLK, DIN, DOUT, and CS pins on the MMA5224AKWR2?
These pins constitute a dedicated SPI test interface used exclusively during factory wafer probe and final test. They are not intended for end-user operation: SCLK, DIN, DOUT, and CS must be grounded or left unconnected in production; TEST must be grounded. Their presence enables full functional validation but adds no runtime capability to the MMA5224AKWR2 in deployed systems.
Can the MMA5224AKWR2 be used in side-impact airbag systems?
Yes, the MMA5224AKWR2 is qualified for side-impact airbag applications. Its AEC-Q100 Grade 1 rating (-40°C to +125°C), 26 kHz g-cell natural frequency, and overdamped mechanical design ensure reliable response to lateral acceleration pulses. The PSI5 interface supports daisy-chained topologies common in door-mounted sensor modules, and its 240g range accommodates typical side-crash decelerations without clipping.
MMA5224AKWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA
- Package/Case:
- 16-QFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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)
MMA5224AKWR2 FAQ
1.How can I place an order for MMA5224AKWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA5224AKWR2 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 MMA5224AKWR2 reliable?
The price and inventory of MMA5224AKWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA5224AKWR2 is usually 5 days.
3.What payment methods are accepted for MMA5224AKWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA5224AKWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA5224AKWR2?
MMA5224AKWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA5224AKWR2 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 MMA5224AKWR2?
For technical support, including MMA5224AKWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA5224AKWR2 requirements.
6.How does Aetrix verify that MMA5224AKWR2 is sourced from the original manufacturer or authorized distributors?
All MMA5224AKWR2 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 MMA5224AKWR2 meets industry standards.
7.What is the process for return or replacement of MMA5224AKWR2?
All MMA5224AKWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA5224AKWR2, 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 MMA5224AKWR2 part is unused and in its original packaging.
Return procedure for MMA5224AKWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMA5224AKWR2 Tags
-
MXC4005XC
Memsic Inc.
-
MC3419
Memsic Inc.
-
MC3479
Memsic Inc.
-
MXC6655XA
Memsic Inc.
-
MC3630
Memsic Inc.
.jpg)
-
LIS2HH12TR
STMicroelectronics
-
KX122-1037
Kionix Inc.
-
LIS2DE12TR
STMicroelectronics
-
LIS2DH12TR
STMicroelectronics
-
MC3635
Memsic Inc.
-
LIS2DS12TR
STMicroelectronics
-
LIS3DHTR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
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…
