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NXP Semiconductors MMA5206KWR2
- Part No.:
- MMA5206KWR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA5206KWR2.pdf
- Description:
- ACCELEROMETER 60G PCM/SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,363
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Product details
Overview
MMA5206KWR2 from NXP Semiconductors (formerly Freescale) is a PSI5-compliant, X-axis satellite accelerometer designed for automotive airbag crash detection systems. It delivers ±60g full-scale range, 10-bit digital output, 400 Hz 3-pole low-pass filtering, and operates across -40°C to +125°C. Its PSI5 v1.3 interface enables robust two-wire daisy-chain communication in high-EMI safety-critical environments.
For engineers reviewing the MMA5206KWR2 datasheet, MMA5206KWR2 pinout, MMA5206KWR2 application, or MMA5206KWR2 equivalent, this page provides verified technical context, exact pin functions, real-world use cases in occupant sensing, and validated alternative options for PSI5 accelerometer migration paths.
Technical Context
The MMA5206KWR2 integrates an overdamped MEMS g-cell with ΣΔ ADC, SINC filter, and programmable DSP chain including selectable 3-pole or 4-pole LPF and fast-startup single-pole HPF. Its internal 4 MHz oscillator drives interpolation to 1 μs timing resolution and synchronizes PSI5 frame generation.
PSI5 communication uses current-modulated IDATA on shared VCC/IDATA line with programmable baud rates (125/190.5 kBaud), 8- or 10-bit data length, and error detection via even parity or 3-bit CRC. Daisy-chain mode is enabled via BUS_SW gate drive controlling external low-side FET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±60g - calibrated linear measurement range optimized for front/side crash pulse detection |
| Output Resolution | 10-bit digital output - provides 1 LSB/g sensitivity with ±5% total sensitivity error over temperature |
| PSI5 Compliance | PSI5 v1.3 - supports synchronous/asynchronous modes, programmable time slots (0.5 μs resolution), and daisy-chain topology |
| Filter Configuration | Selectable 400 Hz, 3-pole LPF - suppresses high-frequency noise while preserving crash event rise-time fidelity |
| Operating Temperature | -40°C to +125°C - AEC-Q100 Grade 1 qualified for under-hood and passenger compartment deployment |
| Supply Voltage | 4.2 V to 17.0 V - wide input range accommodates automotive battery transients without external regulation |
| Quiescent Current | 4.0–8.0 mA - enables low-power system wake-up strategies during vehicle standby |
Pinout & Package
Pb-free 16-pin QFN package (Case 2086-01, 6 mm × 6 mm, 0.5 mm pitch) with exposed thermal pad internally connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | PSI5 Power & Data Line Supply | Supplies device power and carries modulated response current; requires decoupling capacitor to VSS |
| IDATA | PSI5 Response Current Output | Modulates current onto VCC line for PSI5 data transmission; connects through external resistor to bus |
| VBUF | Buffer Regulator Input | Feeds internal regulators (VREG/VREGA); provides EMC immunity and supply dropout resilience |
| VREG / VREGA | Digital / Analog Supply Outputs | Internally regulated 2.5 V supplies; require external 1 μF capacitors to respective ground planes |
| BUS_SW | Daisy-Chain Low-Side Switch Driver | Drives gate of external N-channel FET to enable VSS_OUT connection in multi-sensor chains |
| PCM | Test PCM Output | 4 MHz pulse-code modulated signal proportional to acceleration; enabled via OTP bit |
Key Features
| Feature | Design Value |
|---|---|
| PSI5 v1.3 Daisy Chain Support | Enables up to 3 sensors per bus using BUS_SW-driven external FET, reducing wiring harness complexity |
| Programmable Time Slots (0.5 μs resolution) | Allows precise time-division multiplexing of multiple accelerometers on shared PSI5 bus without collision |
| Fast-Startup Single-Pole HPF | Eliminates DC offset drift within milliseconds-critical for rapid crash detection after vehicle power-on |
| Overdamped MEMS Sensing Element | ζ = 2.76 (±60g variant) ensures no resonance ringing during high-g crash events, improving signal fidelity |
| Self-Test Capability | Validates sensor functionality at startup via controlled electrostatic actuation; outputs known LSB values (e.g., 120 LSB @ ±60g) |
Applications
| Front Airbag Crash Detection | Side Impact Sensor Module |
|---|---|
Use Scenario: Mounted in vehicle dashboard to detect frontal collision deceleration exceeding threshold within 10–30 ms. IC Role / Device Role / Timing Role: Primary X-axis inertial sensor providing time-stamped 10-bit acceleration data via PSI5 to airbag control unit. Use Value: ±60g range and 400 Hz LPF preserve crash pulse rise time while rejecting road noise; AEC-Q100 Grade 1 ensures reliability at 125°C ambient. | Use Scenario: Integrated into door pillar or seat structure to sense lateral acceleration during side collisions or rollovers. IC Role / Device Role / Timing Role: Satellite accelerometer communicating via daisy-chained PSI5 bus to central safety ECU. Use Value: BUS_SW pin enables seamless multi-sensor chaining; 1 μs interpolation latency supports synchronized sampling across distributed sensors. |
| Rollover Detection System | Occupant Classification Interface |
Use Scenario: Mounted near vehicle center of gravity to detect angular acceleration indicative of impending rollover. IC Role / Device Role / Timing Role: High-reliability X-axis accelerometer feeding real-time g-data to rollover algorithm with <100 μs end-to-end latency. Use Value: Overdamped g-cell (ζ = 2.76) prevents resonance artifacts during high-frequency roll motions; -40°C to +125°C operation covers extreme cabin conditions. | Use Scenario: Paired with seat pressure sensors to distinguish adult vs. child occupancy for adaptive airbag deployment logic. IC Role / Device Role / Timing Role: Secondary inertial reference detecting seat vibration patterns and occupant motion dynamics. Use Value: Programmable 8/10-bit data length and CRC/parity error detection ensure data integrity in noisy cabin EMI environment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PSI5 accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP MMA5212KWR2 | ±120g full-scale range; identical pinout, PSI5 interface, and package | Higher range suits rear-impact or heavy-vehicle crash detection where peak g-levels exceed ±60g | Select when system-level crash modeling indicates >±60g events; retains same layout and firmware compatibility |
| Infineon KMR1000-60 | PSI5 v1.3 compliant X-axis accelerometer; ±60g range; 16-pin QFN but different pin assignment (e.g., no BUS_SW) | Lacks daisy-chain hardware support; requires external multiplexer for multi-sensor buses | Choose for cost-sensitive designs without daisy-chain requirement; verify PCB layout changes for pin mapping |
Compared with MMA5212KWR2, the MMA5206KWR2 offers tighter sensitivity tolerance (±5% vs ±7%) at lower g-range, while KMR1000-60 eliminates BUS_SW dependency but sacrifices native daisy-chain integration-requiring additional components for multi-node systems.
Availability
MMA5206KWR2 is available at Aetrix Electronics and suitable for automotive safety systems, airbag control units, and rollover detection modules requiring stable component supply, AEC-Q100 compliance, and PSI5 interface interoperability.
Supply support for MMA5206KWR2 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The MMA52xxKW family was developed as part of NXP's SafeAssure functional safety portfolio, targeting ASIL-B compliant inertial sensing in automotive occupant protection systems using PSI5 physical layer.
FAQ
What is the full-scale range and sensitivity of the MMA5206KWR2?
The MMA5206KWR2 has a ±60g full-scale range with nominal sensitivity of 1 LSB/g in 10-bit mode. Total sensitivity error is ±5% over temperature (-40°C to +125°C) and supply voltage (4.2 V to 17.0 V). This calibration enables precise crash pulse amplitude measurement for airbag deployment algorithms without external scaling.
Does the MMA5206KWR2 support daisy-chain configuration?
Yes, the MMA5206KWR2 supports PSI5 daisy-chain operation via the BUS_SW pin, which drives an external N-channel MOSFET to connect VSS to VSS_OUT. When enabled, this allows up to three MMA5206KWR2 devices on a single PSI5 bus using programmable time slots with 0.5 μs resolution-eliminating need for separate wiring per sensor.
What are the key electrical characteristics of the MMA5206KWR2 power supplies?
The MMA5206KWR2 features three regulated supplies: VBUF (3.6–4.0 V), VREG (2.425–2.575 V digital), and VREGA (2.425–2.575 V analog), each requiring dedicated 1 μF ceramic capacitors. Low-voltage detection thresholds are 3.40 V (VCC), 2.95 V (VBUF), and 2.15 V (VREG/VREGA) with hysteresis to prevent oscillation during brownout conditions.
How does the MMA5206KWR2 handle self-test and fault detection?
The MMA5206KWR2 performs active electrostatic self-test generating known output values (e.g., 120 LSB for ±60g range). It includes offset monitor with ±66 LSB limit, continuous error detection via OTP CRC, and configurable error reporting (even parity or 3-bit CRC) on PSI5 frames-ensuring functional safety compliance for ASIL-B systems.
What is the operating temperature range and qualification status of the MMA5206KWR2?
The MMA5206KWR2 is qualified to AEC-Q100 Revision G, Grade 1, with guaranteed operation from -40°C to +125°C ambient. It meets automotive reliability requirements including ±2000 g powered shock, ±2500 g unpowered shock, and 1.2 m drop shock-validated for placement in instrument panels, pillars, and seats without derating.
MMA5206KWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA
- Package/Case:
- 16-QFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Digital
- Axis:
- X
- Acceleration Range:
- ±60g
- Sensitivity (LSB/g):
- 8
- Sensitivity (mV/g):
- -
- Bandwidth:
- -
- Output Type:
- PCM, SPI
- Voltage - Supply:
- 4.2V ~ 17V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (6x6)
MMA5206KWR2 FAQ
1.How can I place an order for MMA5206KWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA5206KWR2 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 MMA5206KWR2 reliable?
The price and inventory of MMA5206KWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA5206KWR2 is usually 5 days.
3.What payment methods are accepted for MMA5206KWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA5206KWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA5206KWR2?
MMA5206KWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA5206KWR2 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 MMA5206KWR2?
For technical support, including MMA5206KWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA5206KWR2 requirements.
6.How does Aetrix verify that MMA5206KWR2 is sourced from the original manufacturer or authorized distributors?
All MMA5206KWR2 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 MMA5206KWR2 meets industry standards.
7.What is the process for return or replacement of MMA5206KWR2?
All MMA5206KWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA5206KWR2, 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 MMA5206KWR2 part is unused and in its original packaging.
Return procedure for MMA5206KWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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