My Inquiry
My Account
NXP Semiconductors MMA5224KW
- Part No.:
- MMA5224KW
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA5224KW.pdf
- Description:
- ACCELEROMETER 240G PCM/SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,155
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMA5224KW from NXP Semiconductors (formerly Freescale) is an X-axis PSI5-compatible inertial sensor designed for automotive crash detection systems. It delivers ±240g full-scale range, 10-bit digital output with ≤±2% total sensitivity error, 400 Hz 3-pole or 4-pole selectable low-pass filtering, and operates across -40°C to +125°C per AEC-Q100 Grade 1 qualification.
For engineers reviewing the MMA5224KW datasheet, MMA5224KW pinout, MMA5224KW application, or MMA5224KW equivalent, this page provides verified technical context on PSI5 v1.3 compliance, daisy-chain capability via BUS_SW, programmable time slots (0.5 μs resolution), 125/190.5 kBaud options, and 16-pin QFN package integration for airbag control units.
Technical Context
The MMA5224KW implements a sigma-delta ADC with SINC filter and configurable DSP-based low-pass/high-pass filtering. Its PSI5 interface supports synchronous and asynchronous modes, programmable data length (8/10 bits), and error detection (even parity or 3-bit CRC). Internal oscillator runs at 4 MHz ±5%, enabling interpolation to 1 μs timing resolution.
It features dual-stage offset cancellation (0.1 Hz / 0.3 Hz HPF options), fast-startup single-pole high-pass filter, and integrated voltage regulation (VREGA/VREG/VBUF) with independent analog/digital supplies. Daisy chain operation requires external N-channel MOSFET driven by BUS_SW pin with 300 μs activation time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±240g - matches front/side airbag crash pulse profiles without clipping up to 2300g mechanical overload |
| 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 - enables direct integration into automotive body domain controllers with standardized diagnostics |
| Filter Configuration | Selectable 400 Hz 3-pole or 4-pole LPF - suppresses high-frequency noise while preserving crash event rise time integrity |
| Operating Temperature | -40°C to +125°C - qualified per AEC-Q100 Rev G Grade 1 for under-hood and passenger compartment mounting |
| Supply Architecture | VCC (4.2–17.0 V), VBUF (3.6–4.0 V), VREG/VREGA (2.425–2.575 V) - triple-regulated supply ensures EMC immunity and dropout resilience |
| Internal Sample Rate | 16 μs (62.5 kHz) with interpolation to 1 μs - supports precise timestamping of acceleration transients in crash algorithms |
Pinout & Package
Pb-free 16-pin QFN (6 mm × 6 mm, case 2086-01) with exposed thermal pad internally connected to VSS. Pin 17 (PAD) is die attach flag tied to VSS; corner pads also internally connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | PSI5 Power & Data Line Supply | Supplies device via resistor-coupled PSI5 bus; requires 2.2 nF decoupling to VSS per layout guidelines |
| IDATA | PSI5 Response Current Modulator | Modulates current onto same line as VCC for bidirectional PSI5 communication; supports 125/190.5 kBaud |
| VBUF | Buffer Regulator Input | Feeds internal regulators for analog/digital domains; requires 500–1500 nF capacitor to VSS for EMC robustness |
| BUS_SW | Daisy Chain Gate Driver | Drives external N-MOSFET gate for multi-sensor daisy chain; activates within 300 μs after SetAdr command |
| VREGA / VREG | Analog/Digital Supply Outputs | Provide regulated 2.5 V ±37.5 mV for sensor front-end and digital logic; each requires dedicated 1 μF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| PSI5 v1.3 Programmability | Time slot assignment (0.5 μs resolution), baud rate (125/190.5 kBaud), data length (8/10 bits), and CRC/parity selection via OTP |
| Overdamped g-cell | ζ = 1.26 for ±240g variant - eliminates resonance-induced measurement artifacts during high-slew crash events |
| Dual-mode offset cancellation | Configurable 0.1 Hz or 0.3 Hz high-pass filter - enables rapid startup (<100 ms) while rejecting low-frequency drift in vehicle mounting |
| Self-test capability | Active electrostatic self-test yields 56 LSB response at ±240g range - verifies sensor functionality without mechanical stimulus |
| Triple-supply regulation | Independent VBUF → VREGA/VREG path - isolates analog sensor path from digital switching noise and VCC line disturbances |
Applications
| Airbag Front Crash Detection | Airbag Side Impact Detection |
|---|---|
Use Scenario: Mounted on vehicle firewall to detect frontal collision pulses exceeding 10g within 10–30 ms. IC Role / Device Role / Timing Role: Primary X-axis acceleration transducer feeding crash algorithm in airbag ECU; outputs synchronized PSI5 frames at 125 kBaud. Use Value: ±240g range and 400 Hz LPF preserve crash pulse fidelity while rejecting road noise; AEC-Q100 Grade 1 ensures reliability in under-hood thermal cycling. | Use Scenario: Integrated into door module to sense lateral acceleration during side collisions or rollover events. IC Role / Device Role / Timing Role: Satellite accelerometer providing X-axis motion data via daisy-chained PSI5 bus to central body controller. Use Value: BUS_SW pin enables daisy chain with external FET, reducing wiring harness count; 16 μs internal sampling captures rapid side-impact dynamics. |
| Seat Belt Pretensioner Activation | Occupant Classification System |
Use Scenario: Mounted near B-pillar to trigger pretensioner within 25 ms of crash onset based on acceleration integral. IC Role / Device Role / Timing Role: High-reliability inertial input for seat belt control logic; uses PSI5 even-parity mode for fault-tolerant communication. Use Value: Total sensitivity error ≤±2% ensures consistent threshold triggering across temperature; VCC UV detection prevents false triggers during battery dip. | Use Scenario: Paired with pressure sensors to distinguish adult vs. child seating position using low-g acceleration signatures. IC Role / Device Role / Timing Role: Low-noise X-axis sensor operating in 0.1 Hz HPF mode to resolve quasi-static occupant mass distribution. Use Value: System output noise RMS ≤1.0 LSB enables sub-0.5g resolution; 10-bit output supports fine-grained classification thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inertial sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMA5212KW | ±120g full-scale range; identical PSI5 interface, pinout, and package | Lower range suits restraint systems where peak crash acceleration is capped below 150g | Select when system-level crash modeling confirms <120g requirement and cost optimization is prioritized |
| MMA5248KW | ±480g full-scale range; same architecture but higher g-cell clipping limit (2300g) | Required for heavy-vehicle or rollover detection where mechanical overload exceeds 240g | Choose for commercial truck or SUV platforms needing extended dynamic range without redesign |
Compared with MMA5212KW and MMA5248KW, the MMA5224KW strikes optimal balance between crash pulse fidelity and mechanical overload margin for mid-size passenger vehicles, offering 2× the range of MMA5212KW while maintaining identical PCB footprint and firmware compatibility.
Availability
MMA5224KW is available at Aetrix Electronics and suitable for airbag control units, seat belt pretensioner modules, and occupant classification systems requiring stable component supply across automotive production lifecycles.
Supply support for MMA5224KW 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.
The MMA52xxKW family was developed as part of NXP's SafeAssure functional safety portfolio, targeting ASIL-B compliant crash sensing applications with PSI5 interface standardization for deterministic real-time performance.
FAQ
What is the full-scale range of the MMA5224KW?
The MMA5224KW has a full-scale range of ±240g. This is factory-programmed and confirmed in the DEVCFG1 register (RNG[2:0] = 101). The range is optimized for front and side airbag crash detection where peak accelerations typically fall between 50g and 200g, with headroom for mechanical overload up to 2300g without g-cell saturation.
Does the MMA5224KW support daisy-chain configuration?
Yes, the MMA5224KW supports optional daisy chain via the BUS_SW pin, which drives an external N-channel MOSFET to connect VSS to VSS_OUT. This enables multiple MMA5224KW sensors on a single PSI5 bus. Daisy chain requires programming the PSI5 address and configuring BLANKTIME; timing parameters like tBUS_SW (≤300 μs activation) and tDC_BLANKING are specified in the datasheet.
What are the supported PSI5 baud rates for the MMA5224KW?
The MMA5224KW supports two PSI5 baud rates: 125 kBaud and 190.5 kBaud. These are selected via the BAUD bit in the DEVCFG2 register. The choice affects bit time (tBIT_LOW = 8.0 μs typ. at 125 kBaud; tBIT_HI = 5.25 μs typ. at 190.5 kBaud) and must align with host controller capabilities and cable length constraints.
How is offset cancellation implemented in the MMA5224KW?
The MMA5224KW implements dual-stage offset cancellation with configurable high-pass filter cutoffs: 0.1 Hz or 0.3 Hz (selected via DEVCFG2). After cancellation, digital offset is reduced to ≤±1 LSB (10-bit mode). Startup time is <100 ms, and the feature operates continuously during normal PSI5 communication without interrupting data flow.
Is the MMA5224KW pin-compatible with other devices in the MMA52xxKW family?
Yes, all MMA52xxKW variants-including MMA5206KW, MMA5212KW, MMA5224KW, and MMA5248KW-are pin-compatible and share the same 16-pin QFN package (case 2086-01), identical pinout, and register map. Range differentiation is handled entirely via factory-programmed OTP bits (RNG[2:0]), enabling drop-in replacement in existing layouts when range requirements change.
MMA5224KW 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:
- 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-QFN (6x6)
MMA5224KW FAQ
1.How can I place an order for MMA5224KW through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA5224KW 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 MMA5224KW reliable?
The price and inventory of MMA5224KW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA5224KW is usually 5 days.
3.What payment methods are accepted for MMA5224KW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA5224KW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA5224KW?
MMA5224KW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA5224KW 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 MMA5224KW?
For technical support, including MMA5224KW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA5224KW requirements.
6.How does Aetrix verify that MMA5224KW is sourced from the original manufacturer or authorized distributors?
All MMA5224KW 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 MMA5224KW meets industry standards.
7.What is the process for return or replacement of MMA5224KW?
All MMA5224KW units undergo pre-shipment inspection (PSI). If there is an issue with MMA5224KW, 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 MMA5224KW part is unused and in its original packaging.
Return procedure for MMA5224KW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMA5224KW 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…
