MMA5224AKWR2 - ±240g X-Axis PSI5 Accelerometer | NXP
부품 번호: MMA5224AKWR2 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.75 | $117.50 |
| 100 | $10.4 | $1,040.00 |
| 500 | $9.25 | $4,625.00 |
| 1,000 | $8.4 | $8,400.00 |
MMA5224AKWR2 개요
An accelerometer is a micro-electromechanical systems (MEMS) sensor that converts linear acceleration into an analog or digital electrical signal. In the broader sensor hierarchy, the MMA5224AKWR2 belongs to the high-g inertial sensor family used for crash detection, sitting between low-g motion sensors (used for tilt/inclinometer applications) and angular-rate gyroscopes. It is part of the wider power management and sensor ecosystem in modern automotive electronic stability systems.
Key differentiating features include ±240 g measurement range optimized for frontal-impact airbag crash sensing, PSI5 v2.0 protocol compatibility for automotive sensor-peripheral interfacing, integrated Manchester/parasitic SPI modes for legacy compatibility, and AEC-Q100 automotive qualification. The device supports a 4.2 V to 17 V unregulated supply voltage rail commonly available from the vehicle's 12 V battery bus.
The MMA5224AKWR2 uses a MEMS transducer with a capacitive sensing element and dedicated ASIC signal chain that performs amplification, temperature compensation, and PSI5 frame encoding on-chip. The internal oscillator and Manchester decoder allow direct connection to an airbag control unit (ACU) over a two-wire PSI5 bus, reducing wiring harness complexity. The 16-QFN package provides a small board footprint with excellent thermal dissipation for under-hood mounting.
Typical applications include front airbag crash sensors, side-impact pressure/event sensors, seatbelt pretensioner sensors, and chassis control rollover detection. The wide operating temperature range and AEC-Q100 qualification suit it also under the hood and within safety-critical restraint systems.
When designing with this part, engineers should follow NXP's PSI5 bus termination and synchronization timing guidelines to maintain EMC compliance. Power decoupling and reverse-polarity protection at the supply input are also recommended per the datasheet application circuit.
This page synthesizes distributor pricing, pin-compatible MMA52xx family alternatives, and practical design notes not found in the manufacturer datasheet alone.
드롭인 대체품: MMA5224AKWR2 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MMA5224AKWR2 (동일 폼 팩터 및 풋프린트) — 차이점: Supply Voltage, Operating Temperature, Axis, Output Type, Package.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
MMA5224NPKGWR2
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MMA5212AKWR2
✅ 드롭인✓ 재고 있음
$5.9 / 개
데이터시트 보기 →MMA5212KWR2
✅ 드롭인✓ 재고 있음
$7.1 / 개
데이터시트 보기 →MMA5224AKWR2 최대 정격 & 전기적 특성
| Sensor Function | Accelerometer, single-axis X |
| Measurement Axis | X |
| Acceleration Range | ±240 g |
| 출력 유형 | PSI5 digital (Manchester/parasitic SPI) |
| 공급 전압 | 4.2 V to 17 V |
| Protocol | PSI5 v2.0 |
| 패키지 / 케이스 | 16-QFN (6x6) |
| Supplier Device Package | 16-QFN |
| 실장 유형 | Surface Mount |
| 동작 온도 | -40 °C to +125 °C (automotive grade) |
| Automotive Qualification | AEC-Q100 |
| Temperature Grade | Automotive |
| Number of Terminals | 16 |
| Package Code | HQCCN |
| Series | Xtrinsic MMA52xxAKW |
| RoHS 상태 | Compliant |
MMA5224AKWR2 핀 구성
| 핀 1 | VDD — Power supply input (4.2 V to 17 V) |
| 핀 2 | GND — Ground reference |
| 핀 3 | PSI5_DATA — PSI5 data line (bidirectional) |
| 핀 4 | PSI5_SYNC — PSI5 synchronization input |
| 핀 5 | TEST — Test mode enable |
| 핀 6 | NRESET — Reset input (active low) |
| 핀 7 | NC — Not connected (per datasheet) |
| 핀 8 | NC — Not connected (per datasheet) |
| 핀 9 | GND — Ground reference |
| 핀 10 | NC — Not connected (per datasheet) |
| 핀 11 | NC — Not connected (per datasheet) |
| 핀 12 | NC — Not connected (per datasheet) |
| 핀 13 | NC — Not connected (per datasheet) |
| 핀 14 | NC — Not connected (per datasheet) |
| 핀 15 | NC — Not connected (per datasheet) |
| 핀 16 | EP — Exposed pad - thermal/ground |
일반적인 애플리케이션
MMA5224AKWR2 적합 용도: 6 애플리케이션s: Front Airbag Crash Sensor, Side-Impact Pressure / Event Sensor, Seatbelt Pretensioner Sensor, Rollover Detection Sensor, Chassis Control / Active Suspension Sensor, Industrial High-Shock Vibration Monitoring.
Front Airbag Crash Sensor
The MMA5224AKWR2's ±240 g full-scale range directly aligns with frontal-impact crash pulse amplitudes that can reach 60-100 g peak with sub-15 ms rise times in barrier-equivalent deceleration events. According to NXP's Xtrinsic MMA52xxAKW datasheet, the device's PSI5 v2.0 protocol interfaces directly to the airbag control unit over a two-wire bus, reducing harness complexity. The AEC-Q100 qualification and -40 °C to +125 °C operating range support under-dashboard mounting near the vehicle crash zone where ambient temperatures swing from -40 °C winter cold-soak to +85 °C under-hood heat. Unlike lower-g industrial accelerometers (e.g., 2 g/8 g tilt sensors) that would saturate instantly during crash pulses, the 240 g range preserves the deceleration waveform fidelity needed for airbag deployment algorithms.
추천
Side-Impact Pressure / Event Sensor
In side-impact sensing architectures, the MMA5224AKWR2 operates alongside a pressure sensor inside the door cavity, providing X-axis acceleration confirmation that complements pressure-rate-of-change detection. According to NXP's Xtrinsic MMA52xxAKW datasheet, the device's PSI5 v2.0 protocol enables daisy-chaining several sensors on a single two-wire bus with unique addresses, reducing harness count inside the door module. The 240 g range exceeds typical side-impact pulses (30-80 g) with comfortable margin while remaining low-sensitivity means to over-range events. The 16-QFN (6x6) package's small footprint suits door-module PCBs where space is constrained by the window regulator and the speaker magnet.
추천
Seatbelt Pretensioner Sensor
Pretensioner systems use the MMA5224AKWR2 to confirm crash severity before firing the seatbelt retractor pretensioner, which tightens the belt within 10-15 ms of crash detection. According to NXP's datasheet, the device's low latency and PSI5 synchronization capability allow precise timing alignment with airbag firing decisions across multiple restraint loops. The 4.2 V to 17 V supply range tolerates cold-crank and load-dump transients on the 12 V battery bus that often occur during pre-crash braking events. The AEC-Q100 qualification supports deployment in safety-critical loops where functional-safety standards such as ISO 26262 must be demonstrated.
추천
Rollover Detection Sensor
Rollover detection uses the MMA5224AKWR2 to measure lateral acceleration that, combined with a yaw-rate sensor, distinguishes a tripped rollover from an aggressive cornering event. According to the NXP Xtrinsic MMA52xxAKW datasheet, the device's PSI5 v2.0 interface integrates with chassis domain controllers over standard sensor buses. The 240 g range handles both the lateral accelerations during rollover (typically 5-15 g peak) and survives the impact event that often follows roof-strike, where instantaneous accelerations can exceed 50 g. The wide operating temperature range supports mounting locations inside the central body controller or beneath the center console.
추천
Chassis Control / Active Suspension Sensor
Premium active suspension systems use vertical or longitudinal acceleration data from sensors like the MMA5224AKWR2 to drive continuously-variable dampers in real time. According to NXP's datasheet, the 4.2 V to 17 V unregulated supply input eliminates the need for a separate 5 V regulator on the suspension control module, reducing BOM and PCB area. The PSI5 v2.0 protocol provides deterministic latency suitable for 1 ms control loops, unlike CAN or LIN which have higher protocol overhead. The 16-QFN package's small size and good thermal dissipation suit mounting near suspension components where vibration and temperature extremes are common.
추천
Industrial High-Shock Vibration Monitoring
Outside automotive safety systems, the MMA5224AKWR2's ±240 g range and automotive-grade qualification suit industrial vibration monitoring in heavy machinery, press-shop stamping equipment, and CNC spindle monitoring where shock events regularly exceed 50 g. According to NXP's datasheet, the PSI5 protocol can be interfaced to industrial controllers via a PSI5-to-UART bridge IC. The AEC-Q100 qualification provides higher reliability margin than typical industrial-only MEMS accelerometers. The wide operating temperature range handles unheated outdoor cabinets and equipment-bay mounting where temperatures swing with ambient and self-heating of adjacent power components.
추천
추천 제품 요약
엔지니어링 참조 데이터: MMA5224AKWR2 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MMA5224NPKGWR2 | MMA5212AKWR2 | MMA5212KWR2 |
|---|---|---|---|---|
| Package | 16-QFN (6x6) | 16-QFN (6x6) - same | 16-QFN (6x6) - same | 16-QFN (6x6) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Acceleration Range | ±240 g | ±240 g | ±120 g | ±120 g |
| Measurement Axis | X | X | X | X |
| Supply Voltage | 4.2 V to 17 V | 4.2 V to 17 V | 4.2 V to 17 V | 4.2 V to 17 V |
| Protocol | PSI5 v2.0 / Manchester | PSI5 v2.0 / Manchester | PSI5 v2.0 / Manchester | PSI5 v2.0 / Manchester |
| AEC-Q100 Qualified | Yes (A grade) | Yes | Yes (A grade) | No (industrial/commercial) |
주요 차별점
- Wide ±240 g full-scale range for frontal crash (vs MMA5212AKWR2)
- AEC-Q100 automotive qualification with 'A' suffix grade (vs MMA5212KWR2)
- PSI5 v2.0 native protocol support (vs MMA5224NPKGWR2)
설계 노트
The MMA5224AKWR2 operates from 4.2 V to 17 V unregulated supply. Add reverse-polarity protection (a Schottky diode or P-MOSFET) at the supply input to survive jump-start and reverse-battery events common in 12 V systems. Place a 100 nF decoupling capacitor as close as possible to the VDD pin and a 10 µF bulk capacitor on the supply rail. Follow NXP's datasheet reference schematic for the recommended PSI5 bus interface components.
The PSI5 bus uses a two-wire interface with current modulation. Maintain proper bus termination per the PSI5 v2.0 specification - typically 100 Ω at the master end and a low-pass filter on the SYNC line. Keep the bus trace short and twisted-pair with GND to minimize EMI susceptibility. The MMA5224AKWR2's Manchester decoder requires the SYNC signal to be within specification; check timing with an oscilloscope on first power-up.
The 16-QFN (6x6) package exposes the die through the EP (exposed pad) on the bottom. Solder the EP to a ground pad on the PCB with at least 4 thermal vias to the inner ground plane to dissipate heat and provide mechanical stability. Do not route signal traces through the EP pad area. Estimated: with 1 oz copper on a 4-layer board, the EP provides approximately 30-40°C/W θJA.
Do not apply supply voltage above 17 V - the internal LDO will saturate and the device may latch up. Ensure the TEST pin is left floating or pulled low in production; pulling it high enables factory test modes. Verify pin 1 orientation against the package marking before soldering to avoid reverse-mounting, which can short VDD to GND and damage the device.
규정 준수 정보
AEC-Q100 qualified per NXP's Xtrinsic MMA52xxAKW family documentation. RoHS and halogen-free compliant per NXP product page. Note: STMicroelectronics is also listed as a source on Mouser for this MPN, indicating authorized second-source or compatible part distribution.
