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NXP Semiconductors MMA5106LW
- Part No.:
- MMA5106LW
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA5106LW.pdf
- Description:
- ACCELEROMETER 60G PCM/SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,833
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Product details
Overview
MMA5106LW from NXP Semiconductors (formerly Freescale) is a Z-axis PSI5-compatible inertial sensor designed for automotive airbag crash detection. It delivers ±60g full-scale range, 400 Hz 3-pole/4-pole low-pass filtering, 16 μs internal sample rate with 1 μs interpolation resolution, and operates across -40°C to +125°C per AEC-Q100 Grade 1.
For engineers reviewing the MMA5106LW datasheet, MMA5106LW pinout, MMA5106LW application, or MMA5106LW equivalent, this page provides verified technical context, PSI5 v1.3 interface timing, daisy-chain capability, offset cancellation performance, and real-world crash-sensing design implications.
Technical Context
The MMA5106LW implements a ΣΔ ADC with SINC filter and programmable DSP-based LPF (400 Hz, 3- or 4-pole), HPF (0.04/0.1/0.3 Hz), and offset cancellation stages. Its PSI5 v1.3 interface supports 125 kBaud or 190.5 kBaud, 8- or 10-bit data length, even parity or 3-bit CRC, and optional daisy chain via BUS_SW-driven external low-side FET.
Internally regulated supplies include VBUF (3.6–4.0 V), VREG (2.425–2.575 V digital), and VREGA (2.425–2.575 V analog), all monitored for undervoltage with hysteresis. The g-cell has 7.0–8.0 kHz natural frequency, 798–2211 Hz roll-off, and damping ratio of 1.87 for overdamped Z-axis response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±60g - calibrated for front/side crash acceleration detection without clipping below 425g positive or -1205g negative mechanical overload |
| PSI5 Compatibility | PSI5 v1.3 compliant - supports P10P-500/3L timing, programmable time slots (0.5 μs resolution), and daisy-chain mode |
| Filter Configuration | Selectable 400 Hz 3-pole or 4-pole LPF - suppresses high-frequency noise while preserving crash pulse fidelity |
| Sample Rate & Interpolation | 16 μs internal sampling (62.5 kHz) interpolated to 1 μs resolution - enables precise timing of impact onset in safety-critical systems |
| Operating Temperature | -40°C to +125°C (AEC-Q100 Grade 1) - qualified for under-hood and passenger compartment deployment |
| Supply Regulation | VBUF = 3.6–4.0 V, VREG/VREGA = 2.425–2.575 V - independent analog/digital rails reduce coupling noise in high-EMI environments |
| Self-Test Output | 120–280 LSB (10-bit) during active self-test - provides deterministic verification of signal chain integrity pre-deployment |
Pinout & Package
Pb-free 16-pin QFN (6 × 6 mm, case 2086-01) with exposed thermal pad internally connected to VSS. Pin 17 (PAD) must be soldered to PCB ground plane for thermal and EMC performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | PSI5 Power & Data Line Supply | Supplies device via resistor from PSI5 bus; requires 2.2 nF decoupling to VSS for EMI suppression and signal damping |
| IDATA | PSI5 Response Current Modulator | Modulates current on shared PSI5 line for digital communication; supports 125/190.5 kBaud with programmable error detection |
| VBUF | Buffer Regulator Input | Feeds internal regulators (VREG/VREGA); requires 500–1500 nF capacitor to VSS for immunity against supply dropouts |
| BUS_SW | Daisy Chain Gate Driver | Drives external N-channel FET gate to enable VSS_OUT connection in multi-sensor daisy-chain topologies |
| VREG / VREGA | Digital / Analog Supply Outputs | Provide isolated 2.5 V rails; each requires 1 μF X7R ceramic capacitor to respective ground (VSS/VSSA) per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| PSI5 v1.3 Daisy Chain Support | Enables up to 3 sensors on single bus using BUS_SW-controlled external FET, reducing wiring harness complexity in multi-airbag systems |
| Programmable Time Slots (0.5 μs resolution) | Allows precise scheduling of sensor responses to avoid collision on shared PSI5 bus, critical for synchronized crash detection across vehicle zones |
| Overdamped Z-Axis Sensing Element | Damping ratio of 1.87 ensures minimal ringing during high-g transients, delivering clean step-response for reliable crash discrimination |
| Two-Stage Offset Cancellation | Reduces digital offset to ±1 LSB (10-bit) after compensation, maintaining accuracy over temperature and lifetime without recalibration |
| Internal 4 MHz PCM Test Output | Provides analog-like diagnostic signal proportional to acceleration for production test and field diagnostics without SPI interface dependency |
Applications
| Airbag Front Crash Detection | Airbag Side Impact Detection |
|---|---|
Use Scenario: Mounted in vehicle front rail to detect frontal collision events exceeding 15g within 10–30 ms. IC Role / Device Role / Timing Role: Z-axis accelerometer providing primary trigger signal to airbag control unit via PSI5 bus with <300 μs daisy-chain activation latency. Use Value: ±60g range and 400 Hz LPF reject road noise while preserving crash pulse rise time; AEC-Q100 Grade 1 ensures reliability at 125°C under-hood operation. | Use Scenario: Integrated into door module or B-pillar to detect lateral intrusion during side collisions. IC Role / Device Role / Timing Role: Satellite Z-axis sensor in daisy-chained PSI5 network, assigned unique time slot for deterministic response timing. Use Value: BUS_SW pin enables seamless integration of multiple side sensors on one bus; 1 μs interpolation resolution supports precise impact localization algorithms. |
| Passenger Presence Detection | Seat Belt Pretensioner Activation |
Use Scenario: Mounted beneath seat cushion to detect occupant mass and position via low-frequency vibration analysis. IC Role / Device Role / Timing Role: High-stability Z-axis inertial sensor feeding analog-domain HPF (0.04 Hz cutoff) for quasi-static displacement sensing. Use Value: ±60g range avoids saturation during normal vehicle motion; offset cancellation maintains ±1 LSB accuracy over temperature for consistent occupant classification. | Use Scenario: Deployed in seat belt retractor assembly to sense sudden deceleration during rear-end collisions. IC Role / Device Role / Timing Role: Fast-response Z-axis sensor triggering pretensioner within 15 ms of event onset using PSI5 synchronous mode. Use Value: 16 μs internal sampling and 1 μs interpolation enable sub-millisecond timing resolution; AEC-Q100 qualification guarantees operation in constrained mechanical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inertial sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP MMA5212LW | ±120g full-scale range; identical PSI5 v1.3 interface, pinout, and package; higher g-range g-cell design | Suitable for rollover detection or heavy-vehicle crash sensing where >60g dynamic range is required | Select when system-level crash modeling indicates peak acceleration exceeds ±60g; no PCB changes needed |
| Analog Devices ADXL316WBRMZ-RL | ±16g range, SPI/I²C interface, 1.8 V supply; no PSI5 support; different 12-pin LFCSP package | Applicable in non-automotive industrial shock monitoring where PSI5 compliance is not mandated | Choose only if PSI5 bus architecture is absent; requires full interface redesign and layout revision |
Compared with MMA5106LW, MMA5212LW offers extended range for higher-g crash scenarios while maintaining full compatibility, whereas ADXL316WBRMZ-RL serves non-PSI5 applications but demands new interface logic and mechanical integration.
Availability
MMA5106LW is available at Aetrix Electronics and suitable for automotive airbag systems, occupant detection modules, and seat belt pretensioner controllers requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant inertial sensing.
Supply support for MMA5106LW 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in sensor signal conditioning and functional safety.
The MMA51xxLW product line was developed as part of NXP's SafeAssure portfolio specifically for ASIL-B-capable automotive safety systems, targeting PSI5-based crash detection with integrated diagnostics and daisy-chain scalability.
FAQ
What is the full-scale range and sensitivity of the MMA5106LW?
The MMA5106LW has a factory-programmed ±60g full-scale range. Its sensitivity is 8 LSB/g (10-bit output at 100 Hz), with total sensitivity error ≤±5% across -40°C to +125°C. This range and calibration ensure accurate detection of crash pulses above 15g while avoiding saturation during high-g events up to 425g positive or -1205g negative mechanical overload.
Does the MMA5106LW support daisy-chain configuration, and how is it implemented?
Yes, the MMA5106LW supports PSI5 daisy chaining via the BUS_SW pin, which drives the gate of an external N-channel MOSFET to connect VSS to VSS_OUT. This enables up to three sensors on a single PSI5 bus with programmable time slots (0.5 μs resolution). The MMA5106LW datasheet confirms daisy-chain mode operation and specifies tBUS_SW ≤ 300 μs activation time with 50 pF load.
What are the key power supply requirements for stable operation of the MMA5106LW?
The MMA5106LW requires VCC = 4.2–17.0 V (PSI5 bus), with internally regulated VBUF = 3.6–4.0 V, VREG = 2.425–2.575 V (digital), and VREGA = 2.425–2.575 V (analog). Each regulator output needs dedicated 1 μF X7R capacitors to VSS or VSSA. VCC decoupling uses 2.2 nF + 15 nF ceramics, and VBUF requires 500–1500 nF to ensure immunity against supply dropouts.
How does the MMA5106LW handle offset drift over temperature and time?
The MMA5106LW implements two-stage offset cancellation: Stage 1 (0.3 Hz HPF) and Stage 2 (0.04 Hz HPF), reducing digital offset to ±1 LSB (10-bit) after compensation across -40°C to +125°C. The offset monitor updates at fOSC/2000 Hz and limits deviations to ±66 LSB before compensation, ensuring long-term stability without external recalibration in automotive safety systems.
Is the MMA5106LW compatible with PSI5 Version 1.3, and what specific features does it implement?
Yes, the MMA5106LW is fully PSI5 Version 1.3 compatible, implementing P10P-500/3L timing, programmable time slots (0.5 μs resolution), selectable baud rates (125/190.5 kBaud), 8- or 10-bit data length, even parity or 3-bit CRC error detection, and two-wire programming mode. These features are explicitly confirmed in the Freescale MMA51xxLW datasheet Rev. 1 (03/2014), Section "PSI5 Version 1.3 Compatible".
MMA5106LW 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)
MMA5106LW FAQ
1.How can I place an order for MMA5106LW through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA5106LW 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 MMA5106LW reliable?
The price and inventory of MMA5106LW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA5106LW is usually 5 days.
3.What payment methods are accepted for MMA5106LW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA5106LW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA5106LW?
MMA5106LW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA5106LW 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 MMA5106LW?
For technical support, including MMA5106LW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA5106LW requirements.
6.How does Aetrix verify that MMA5106LW is sourced from the original manufacturer or authorized distributors?
All MMA5106LW 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 MMA5106LW meets industry standards.
7.What is the process for return or replacement of MMA5106LW?
All MMA5106LW units undergo pre-shipment inspection (PSI). If there is an issue with MMA5106LW, 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 MMA5106LW part is unused and in its original packaging.
Return procedure for MMA5106LW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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