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NXP Semiconductors MMA5106KW
- Part No.:
- MMA5106KW
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA5106KW.pdf
- Description:
- ACCELEROMETER 60G PCM/SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,994
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Product details
Overview
MMA5106KW from NXP Semiconductors (formerly Freescale) is a Z-axis satellite accelerometer with PSI5 Version 1.3 interface, ±60g full-scale range, AEC-Q100 Grade 1 qualification (−40°C to +125°C), and 16-pin QFN package. It delivers 10-bit digital output, 400 Hz low-pass filtering, and fast startup for airbag crash detection systems.
For engineers reviewing the MMA5106KW datasheet, MMA5106KW pinout, MMA5106KW application, or MMA5106KW equivalent, this page provides verified technical context, real-world timing and noise specs, PSI5 daisy-chain configuration details, and validated automotive-grade alternatives for front/side impact sensing.
Technical Context
The MMA5106KW integrates an overdamped MEMS g-cell with ΣΔ ADC, SINC filter, and programmable IIR/HPF stages. Its internal 4 MHz oscillator drives all timing-critical functions including PSI5 bit timing (7.6–8.4 μs per bit at 125 kBaud), interpolation latency (64–65 / fOSC), and offset cancellation stages (tOC1 = 320 ms).
PSI5 communication uses two-wire current modulation on IDATA/VCC lines with selectable baud rates (125/190.5 kBaud), data lengths (8/10 bits), and error detection (even parity or 3-bit CRC). Daisy chain mode requires external low-side FET driven by BUS_SW, with address programming resolution of 0.5 μs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±60g - defines maximum measurable acceleration before clipping; supports front/side airbag deployment thresholds. |
| PSI5 Baud Rate | 125 kBaud or 190.5 kBaud - determines bus throughput and synchronization pulse timing in multi-sensor networks. |
| Low-Pass Filter | 400 Hz, 3-pole - suppresses high-frequency noise while preserving crash pulse integrity up to ~150 Hz. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and passenger compartment mounting. |
| Internal Oscillator | 4 MHz ±5% - clocks all digital blocks, filters, and PSI5 timing; enables interpolation to 1 μs resolution. |
| Supply Voltage Range | VCC = 4.2 V to 17.0 V - compatible with automotive battery rail (9–16 V) with transient tolerance to 25 V. |
| Quiescent Current | 4.0–8.0 mA - sets baseline power budget for always-on crash detection subsystems. |
Pinout & Package
Pb-free 16-pin QFN (6 mm × 6 mm, case 2086-01) with exposed thermal pad internally connected to VSS. Pin 17 (die attach pad) must be soldered to PCB ground plane for EMC immunity and thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | PSI5 Power & Data Line Supply | Supplies device via resistor-limited PSI5 bus; requires 2.2 nF decoupling to VSS per datasheet. |
| IDATA | PSI5 Response Current Output | Modulates current onto VCC line for PSI5 data transmission; supports daisy chain with external FET. |
| VBUF | Buffer Regulator Input | Feeds internal regulators (VREG/VREGA); isolates analog/digital supplies from VCC transients. |
| VREG / VREGA | Digital / Analog Supply Outputs | Provide stable 2.5 V ±75 mV for logic and sensor signal chain; require 1 μF ceramic capacitors to VSS/VSSA. |
| BUS_SW | Daisy Chain Gate Driver | Drives external N-channel FET gate to enable VSS_OUT switching; tBUS_SW ≤ 300 μs ensures deterministic timing. |
| PCM | Test PCM Output | 4 MHz pulse-code modulated signal proportional to acceleration; enabled via OTP bit DEVCFG2.PCM. |
Key Features
| Feature | Design Value |
|---|---|
| PSI5 v1.3 Compliance | Supports P10P-500/3L protocol, time-slot programming (0.5 μs resolution), and optional daisy chain-enables scalable multi-sensor architectures without additional wiring. |
| Overdamped Z-Axis Sensing | ζ = 1.87 (±60g range) eliminates resonance artifacts above 798 Hz roll-off; critical for accurate crash pulse shape capture. |
| Fast Startup HPF | Single-pole high-pass filter with rapid settling enables immediate post-power-on readiness for crash events within milliseconds. |
| Self-Test Capability | Active electrostatic self-test generates known acceleration (120 LSB @ ±60g); validates sensor path integrity before vehicle start-up. |
| Offset Cancellation | Two-stage adaptive algorithm reduces digital offset to ±1 LSB (10-bit mode); maintains accuracy across temperature and lifetime drift. |
Applications
| Front Airbag Crash Detection | Side Impact Detection |
|---|---|
Use Scenario: Mounted on vehicle firewall or instrument panel to detect frontal collision deceleration exceeding 20–30g threshold. IC Role / Device Role / Timing Role: Z-axis accelerometer providing real-time acceleration data via PSI5 to airbag control unit (ACU) with <100 μs latency. Use Value: ±60g range and 400 Hz LPF preserve crash pulse fidelity while rejecting road noise; AEC-Q100 Grade 1 ensures reliability in harsh under-dash environments. | Use Scenario: Integrated into door modules or B-pillars to sense lateral acceleration during side collisions or rollovers. IC Role / Device Role / Timing Role: Satellite sensor feeding PSI5 daisy chain with precise time-slot allocation for synchronized multi-node sampling. Use Value: BUS_SW pin enables low-cost daisy chain topology; 0.5 μs time-slot resolution allows sub-microsecond inter-sensor timing alignment. |
| Seat Occupancy Sensing | Crash Event Data Logger |
Use Scenario: Detecting occupant presence and weight-class via low-g static acceleration measurement during vehicle idle. IC Role / Device Role / Timing Role: High-stability Z-axis sensor with programmable HPF cutoff (0.04–0.3 Hz) for quasi-static offset tracking. Use Value: Offset cancellation reduces drift to ±1 LSB over temperature; enables reliable classification of adult vs. child seat using acceleration magnitude. | Use Scenario: Capturing pre-crash and crash-phase acceleration waveforms for EDR (Event Data Recorder) compliance. IC Role / Device Role / Timing Role: High-fidelity inertial sensor with 1 μs interpolation resolution and 1.0 LSB RMS noise (1–1 kHz band). Use Value: 10-bit output with ±5% total sensitivity error meets FMVSS 208 waveform fidelity requirements; internal 4 MHz clock ensures timestamp consistency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Z-axis PSI5 accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP MMA5212KW | ±120g range, same 16-pin QFN, identical PSI5 v1.3 interface and daisy-chain capability. | Higher full-scale range suits rear-impact or rollover detection where peak g-levels exceed ±60g. | Select when system-level crash modeling requires extended dynamic range without changing PCB layout or firmware interface. |
| Infineon KMI16A | PSI5 v1.3-compliant Z-axis accelerometer, ±60g range, but uses 12-pin SOIC package and lacks BUS_SW daisy-chain driver. | Requires external switch IC for daisy chain; no integrated low-side gate driver limits topology flexibility. | Choose only if SOIC footprint is mandated and daisy chain is implemented externally; verify timing compatibility with tBUS_SW ≤ 300 μs requirement. |
Compared with MMA5106KW, MMA5212KW extends measurement headroom for higher-g events while retaining pinout and firmware compatibility, whereas KMI16A offers functional equivalence but demands board-level redesign for daisy chain implementation due to missing BUS_SW functionality.
Availability
MMA5106KW is available at Aetrix Electronics and suitable for front airbag crash detection, side impact sensing, and seat occupancy monitoring requiring stable component supply across automotive production lifecycles.
Supply support for MMA5106KW 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 applications.
The MMA51xxKW series belongs to NXP's Xtrinsic inertial sensor portfolio, designed specifically for PSI5-based automotive safety systems requiring AEC-Q100 Grade 1 reliability and deterministic real-time response.
FAQ
What is the full-scale range and sensitivity of the MMA5106KW?
The MMA5106KW has a ±60g full-scale range. Its typical sensitivity is 8 LSB/g in 10-bit output mode at 100 Hz, referenced to 0 Hz. Total sensitivity error is ±5% across temperature and supply voltage, ensuring consistent performance in automotive environments where calibration stability is critical for airbag deployment decisions. The MMA5106KW maintains this specification under AEC-Q100 Grade 1 conditions (−40°C to +125°C).
Does the MMA5106KW support daisy chain configuration?
Yes, the MMA5106KW supports PSI5 daisy chain via its BUS_SW pin, which drives an external N-channel MOSFET gate to switch VSS_OUT. Time-slot programming resolution is 0.5 μs, enabling precise inter-sensor synchronization. The MMA5106KW implements PSI5 Version 1.3 with P10P-500/3L compatibility and requires external components (R3 = 20 kΩ, M1 = N-channel FET) per Figure 1. No internal daisy chain logic exists-the MMA5106KW relies on external hardware for node addressing.
What are the key electrical characteristics of the MMA5106KW's PSI5 interface?
The MMA5106KW PSI5 interface operates at 125 kBaud or 190.5 kBaud with single-bit times of 7.6–8.4 μs or 4.9875–5.5125 μs respectively. It supports 8- or 10-bit data length and error detection via even parity or 3-bit CRC. Modulation current rise/fall times are 324–602 ns, and bit transition positions are centered at 49–51% of the bit period. These parameters ensure robust communication in noisy automotive harnesses while meeting ISO 17987-2 timing constraints.
How does the MMA5106KW handle power supply variations and brown-out conditions?
The MMA5106KW features independent low-voltage detection on VCC (3.4–4.0 V threshold), VBUF (2.95–3.35 V), VREG (2.15–2.35 V), and VREGA (2.15–2.35 V), each with programmable hysteresis. Internal regulators maintain stable 2.5 V outputs despite VCC transients up to 25 V. Quiescent current is 4.0–8.0 mA, and inrush current is limited to 30 mA. This architecture ensures uninterrupted operation during cold-crank (≥4.2 V) and load-dump (≤17 V) events common in 12 V automotive systems.
Can the MMA5106KW be used for non-automotive applications?
The MMA5106KW is qualified to AEC-Q100 Grade 1 and optimized for automotive safety systems, but its PSI5 interface, ±60g range, and 400 Hz LPF make it technically viable for industrial shock monitoring or high-reliability motion logging where deterministic timing and EMC resilience are required. However, NXP does not guarantee performance outside automotive temperature ranges or vibration profiles. For non-automotive use, validation of PSI5 master compatibility, thermal derating, and long-term bias stability is essential before integration. The MMA5106KW remains primarily intended for airbag and restraint control applications.
MMA5106KW 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:
- Z
- Acceleration Range:
- ±60g
- Sensitivity (LSB/g):
- 8
- 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)
MMA5106KW FAQ
1.How can I place an order for MMA5106KW through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA5106KW 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 MMA5106KW reliable?
The price and inventory of MMA5106KW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA5106KW is usually 5 days.
3.What payment methods are accepted for MMA5106KW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA5106KW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA5106KW?
MMA5106KW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA5106KW 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 MMA5106KW?
For technical support, including MMA5106KW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA5106KW requirements.
6.How does Aetrix verify that MMA5106KW is sourced from the original manufacturer or authorized distributors?
All MMA5106KW 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 MMA5106KW meets industry standards.
7.What is the process for return or replacement of MMA5106KW?
All MMA5106KW units undergo pre-shipment inspection (PSI). If there is an issue with MMA5106KW, 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 MMA5106KW part is unused and in its original packaging.
Return procedure for MMA5106KW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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