MMA5224KW - ±240g X-Axis PSI5 Satellite Accelerometer | NXP
料号： MMA5224KW ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.4 | $12.40 |
| 10 | $11.18 | $111.80 |
| 100 | $9.85 | $985.00 |
| 500 | $8.92 | $4,460.00 |
| 1,000 | $8.05 | $8,050.00 |
MMA5224KW 概述
An accelerometer is a micro-electro-mechanical (MEMS) sensor that converts linear acceleration into an analog or digital output proportional to displacement of a proof mass. Within the broader automotive sensor hierarchy, the MMA5224KW sits in the high-g (>100 g) crash-sensor hypernym tier above low-g vehicle dynamics sensors (e.g., electronic stability control) and below gyroscopes, IMUs, and full 6-DOF inertial measurement units. It is an axis-specific (single-axis X) over-damped sensor, a category valued in airbag systems for flat phase response and pulse fidelity during a crash event lasting 5-70 ms.
Key features include an integrated PSI5 v1.3 transceiver with 10-bit data length, Manchester coding, and selectable bit rates of 125 kbps or 250 kbps; onboard synchronous sampling; bidirectional communication; and 16 programmable PSI5 addresses. The device operates from a regulated 5 V supply on a low-power Manchester-coded current loop, with a typical standby current well below 1 mA to avoid draining the satellite wiring harness during ignition-off crash sensing.
Internally, the MMA52xxKW die uses a hermetically-sealed silicon bulk-micromachined proof mass with capacitive differential readout, sigma-delta conversion, and a digital PSI5 communication block. Over-damped mechanical response is deliberately chosen (versus critically-damped) to avoid ringing artefacts at the airbag ECU's crash-algorithm input, providing cleaner pulse reconstruction than under-damped competitor parts.
Typical applications include front, side, and rear impact satellite crash sensors, pedestrian protection satellite modules, and AKLV27 vehicle network peripherals. The 16-QFN (6x6) package carries automotive-grade qualification (AEC-Q100) needed for under-bumper or seat-mounted satellite placement.
Designers must route the PSI5 two-wire current loop as a twisted pair back to the ECU, maintain the recommended decoupling network close to VDD, and respect the absolute maximum acceleration rating to avoid latched mechanical damage. This page synthesises XAIPART distributor pricing, drop-in alternative MPNs, and practical PCB implementation notes not found on the single distributor listings.
直接替换替代料： MMA5224KW ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MMA5224KW （相同外形与封装尺寸） ——差异在于 Sensor Type, Package, Supply Voltage, Mounting Type, Axis.
快速对比工具——选择替代料号进行并排对比：
MMA5124KW
✅ 直接替换✓ 有现货
$9.75 / 个
查看数据手册 →MMA5206KW
✅ 直接替换✓ 有现货
$3.85 / 个
查看数据手册 →MMA5212KW
✅ 直接替换✓ 有现货
$5.95 / 个
查看数据手册 →MMA5232KW
✅ 直接替换📋 参考替代料（不在目录中）
MMA5264KW
✅ 直接替换📋 参考替代料（不在目录中）
MMA5224KW 最大额定值与电气特性
| 传感器类型 | Accelerometer (single-axis X) |
| Family | Xtrinsic MMA52xxKW (PSI5 / AKLV27 satellite) |
| Axis of Measurement | X (single axis, lateral) |
| Full-Scale Acceleration Range | ±240 g |
| Mechanical Damping | Overdamped (deliberate per datasheet) |
| Protocol Compatibility | PSI5 Version 1.3 / AKLV27 |
| Data Coding | Manchester coded, 10-bit data length |
| Bit Rate | 125 kbps or 250 kbps selectable |
| Programmable Addresses | 16 PSI5 addresses |
| Communication Type | Bidirectional, synchronous |
| Supply Voltage (VDD) | 5 V (regulated) |
| 封装 | 16-QFN (HQCCN, 6x6 mm) |
| 安装类型 | Surface Mount (SMT) |
| Automotive Qualification | AEC-Q100 (per device family) |
| EU RoHS Status | RoHS Compliant (Lead Free) |
| Operating Mode | Satellite node, two-wire current loop to ECU |
MMA5224KW 引脚配置
| 引脚 1 | VREG_CAP — Regulator capacitor - external capacitor to VSS |
| 引脚 2 | VSS — Digital ground |
| 引脚 3 | IDATA — Response current - PSI5 data line through resistor |
| 引脚 4 | VDD — Regulated 5 V supply |
| 引脚 5 | ADDR0 — PSI5 address select bit 0 |
| 引脚 6 | ADDR1 — PSI5 address select bit 1 |
| 引脚 7 | ADDR2 — PSI5 address select bit 2 |
| 引脚 8 | ADDR3 — PSI5 address select bit 3 |
| 引脚 9 | TEST — Factory test pin (per datasheet) |
| 引脚 10 | RESET — PSI5 reset input |
| 引脚 11 | NC — Not connected (per datasheet) |
| 引脚 12 | NC — Not connected (per datasheet) |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | NC — Not connected (per datasheet) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | EP — Exposed pad - thermal/ground |
典型应用
MMA5224KW 适用于 6 应用s: Front-Impact Airbag Satellite Sensor, Side-Impact (Door-Mounted) Satellite Sensor, Pedestrian-Protection Satellite Module, Rear-Impact / Rollover Detection Satellite, AKLV27 Vehicle Network Peripheral, Crash-Recorder (EDR) Remote Sensor.
Front-Impact Airbag Satellite Sensor
The MMA5224KW with ±240 g full-scale X-axis range and overdamped mechanical response suits front-impact satellite placement behind the bumper beam, where crash pulses contain shock components above 100 g during a 5-15 ms barrier impact. Its PSI5 v1.3 Manchester-coded two-wire current loop allows the sensor to be wired as a satellite node 3-5 m away from the central airbag ECU without signal integrity loss. Compared with under-damped competitor designs, the deliberate over-damping eliminates ringing in the acceleration profile, giving the ECU's crash algorithm a cleaner pulse to integrate and reducing the risk of late-fire or no-fire events in hard-narrow-object impacts.
推荐
Side-Impact (Door-Mounted) Satellite Sensor
Side-impact crash events occur over 2-5 ms with peak accelerations of 80-150 g; the MMA5224KW's 240 g headroom plus AKLV27 protocol support allow the same satellite hardware to be deployed in the door cavity or B-pillar, where it interrogates pulse width and edge rate to discriminate between far-side and near-side intrusions. Because the part integrates the PSI5 v1.3 transceiver, the door wiring harness needs only two conductors carrying both power and Manchester-coded data, reducing harness mass versus dedicated analog satellite sensors from earlier airbag generations.
推荐
Pedestrian-Protection Satellite Module
Active hood and pedestrian-protection airbag systems mount a forward-facing satellite behind the bumper cover to detect bumper-pole or femur impacts at 50-120 g over 10-30 ms. The MMA5224KW's ±240 g range captures the full range of pedestrian pole impacts while its overdamped response avoids the signal ringing that would otherwise mask the characteristic high-frequency pole-impact signature from low-speed bumper-trim impacts. PSI5 v1.3 bidirectional communication also enables the satellite to acknowledge health-check polls from the ECU during the standby phase before ignition, simplifying production-line end-of-line testing.
推荐
Rear-Impact / Rollover Detection Satellite
Rear-impact and rollover detection modules sit in the C-pillar or roof rail and require a high-g X-axis (or rearward-facing) sensor to register rear-end collisions and early signs of rollover. The MMA5224KW's 240 g ceiling handles the impulsive spike of a rear-barrier hit at closing speeds above 60 km/h without saturating, and its PSI5 v1.3 programmable 16-address space allows multiple roof-mounted satellites to share one ECU polling loop with unique IDs, simplifying wiring and reducing connector pin count at the satellite junction.
推荐
AKLV27 Vehicle Network Peripheral
Beyond airbag-satellite placement, the MMA5224KW is qualified as an AKLV27-compliant peripheral for in-vehicle safety networks that use the AKLV27 protocol variant. Its bidirectional synchronous interface supports host-initiated diagnostic commands, allowing production-line testers and service tools to read the live sensor output and verify the calibration trim through the PSI5 link without removing the sensor from the vehicle - cutting OEM end-of-line test time versus legacy analog accelerometer satellite interfaces.
推荐
Crash-Recorder (EDR) Remote Sensor
Event Data Recorders installed in heavy commercial trucks and passenger cars increasingly use satellite-mounted sensors separated from the central EDR module. The MMA5224KW's overdamped mechanical response generates a true acceleration waveform without overshoot, allowing the EDR to capture a higher-fidelity crash pulse and improving forensic reconstruction of pre-crash velocity and delta-V values. Its low standby current on the PSI5 loop means the part can be permanently powered through the satellite harness without imposing a measurable parasitic drain on the vehicle battery during long parking periods.
推荐
推荐产品汇总
工程参考数据： MMA5224KW ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MMA5124KW | MMA5206KW | MMA5212KW | MMA5232KW | MMA5264KW |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 16-QFN (6x6 mm, HQCCN) | 16-QFN (6x6 mm) - same | 16-QFN (6x6 mm) - same | 16-QFN (6x6 mm) - same | 16-QFN (6x6 mm) - same | 16-QFN (6x6 mm) - same |
| Mechanical Damping | Overdamped | Overdamped - same | Overdamped - same | Overdamped - same | Overdamped - same | Overdamped - same |
| Communication Protocol | PSI5 v1.3 / AKLV27 | PSI5 v1.3 / AKLV27 - same | PSI5 v1.3 / AKLV27 - same | PSI5 v1.3 / AKLV27 - same | PSI5 v1.3 / AKLV27 - same | PSI5 v1.3 / AKLV27 - same |
| Bit Rate | 125 kbps / 250 kbps | 125 kbps / 250 kbps - same | 125 kbps / 250 kbps - same | 125 kbps / 250 kbps - same | 125 kbps / 250 kbps - same | 125 kbps / 250 kbps - same |
| Address Slots | 16 programmable | 16 programmable - same | 16 programmable - same | 16 programmable - same | 16 programmable - same | 16 programmable - same |
| Automotive Qualification | AEC-Q100 (family) | AEC-Q100 - same | AEC-Q100 - same | AEC-Q100 - same | AEC-Q100 - same | AEC-Q100 - same |
| RoHS / Lead-Free | Yes | Yes - same | Yes - same | Yes - same | Yes - same | Yes - same |
关键差异点
- Mid-range full-scale within the family （对比 MMA5124KW)
- Lower sensitivity (wider range) than MMA5206KW （对比 MMA5206KW)
- Balanced range vs headroom vs MMA5232KW （对比 MMA5232KW)
设计说明
Place the regulator capacitor (pin 1 to VSS) within 2 mm of the device pin, using a low-ESR ceramic capacitor; route the IDATA line as a 100-ohm differential-twin with the GND return to avoid capacitive loading that distorts the Manchester-coded PSI5 rise/fall times. Keep digital ground and analog ground returns star-connected at the device exposed pad (pin 16). The 16-QFN exposed pad must be soldered to a contiguous ground copper pour of at least 25 mm² to provide the thermal and EMC return path.
Do not exceed the absolute maximum acceleration rating even during end-of-line drop-testing; the over-damped proof mass will survive higher peak-g inputs than a critically-damped design but is still limited. Also avoid routing the PSI5 loop near high-current traces such as electric power steering or brake-by-wire modules because injector-current transients couple magnetically into the PSI5 current loop and trigger false crash-algorithm triggers.
The 16-QFN thermal/ground pad must be soldered to a contiguous ground pour to meet AEC-Q100 mechanical-shock and vibration tests. Use address pins 5-8 with pull-up or pull-down resistors to set the unique PSI5 ID; verify the resistor value does not exceed the source/sink current rating of the address pins. Keep the satellite PCB outline compatible with the housing fixture so the X-axis sensing direction aligns with the vehicle crash axis (positive X forward in the vehicle coordinate frame).
合规信息
RoHS and lead-free status per DigiChip compliance attributes. AEC-Q100 automotive qualification is family-level; verify exact device grade on the lot certification. Halogen-free status not explicitly listed in provided data - set to unknown.
