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NXP Semiconductors MMA6527KCWR2
- Part No.:
- MMA6527KCWR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA6527KCWR2.pdf
- Description:
- ACCELEROMETER 120G SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,935
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Product details
Overview
MMA6527KCWR2 from NXP Semiconductors is a dual-axis, SPI-based, over-damped lateral accelerometer with ±120 g full-scale range on both X and Y axes, 12-bit digital output, and AEC-Q100 Grade 1 qualification for automotive airbag deployment systems. It operates from 3.3 V or 5 V supply, features twelve programmable low-pass filter options (50–1000 Hz), and integrates independent arming outputs per axis.
For engineers reviewing the MMA6527KCWR2 datasheet, MMA6527KCWR2 pinout, MMA6527KCWR2 application, or MMA6527KCWR2 equivalent, this page delivers verified technical context, exact pin functions, automotive-grade reliability data, and real-world airbag system integration guidance - not generic sensor summaries.
Technical Context
The MMA6527KCWR2 uses a sigma-delta (ΣΔ) modulator with SINC filtering and IIR compensation to deliver stable acceleration measurement under high-shock conditions. Its internal 8 MHz oscillator feeds two independent 1 MHz clock domains for X/Y signal chains, each with configurable low-pass filters and offset cancellation using >6.2 s averaging.
Each axis supports independent arming logic (open-drain ARM_X/ARM_Y outputs) with programmable thresholds and response modes (moving average, count, or unfiltered). The device includes built-in self-test with factory-trimmed deflection values stored in OTP registers and CRC-protected register access for functional safety compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±120 g on both X and Y axes - enables detection of severe crash events without saturation in front/side impact scenarios. |
| Digital Output Resolution | 12-bit signed or unsigned SPI output - provides 4096 discrete levels for precise acceleration quantization. |
| Sensitivity (12-bit) | 16.0 LSB/g - fixed scaling factor enabling direct conversion of raw SPI data to g-units without calibration. |
| Low-Pass Filter Options | 12 selectable cutoffs (50–1000 Hz, 3- or 4-pole) - allows tuning bandwidth to match vehicle-specific crash pulse profiles. |
| Supply Voltage | 3.3 V or 5.0 V single supply - supports legacy 5 V automotive ECUs and modern 3.3 V microcontrollers without level shifters. |
| Operating Temperature | −40 °C to +105 °C - qualified for under-hood and passenger compartment mounting per AEC-Q100 Grade 1. |
| Shock Survival | ±2000 g unpowered, ±1500 g powered - survives manufacturing handling and crash-induced mechanical shock without damage. |
Pinout & Package
Pb-free 16-pin QFN package, 6 mm × 6 mm × 1.98 mm, with exposed die attach pad internally connected to VSS. Corner pads are internally tied to VSS for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREGA | Analog supply input | Provides regulated power to analog front-end; requires 1 μF decoupling capacitor to VSSA for noise suppression. |
| VSS / VSSA | Digital and analog ground | Separate ground returns prevent digital switching noise from corrupting analog sensor signals. |
| ARM_X / ARM_Y | Configurable arming output | Open-drain outputs that assert active-low/high upon axis-specific threshold crossing - directly drives airbag squib logic or MCU interrupt pins. |
| MISO / MOSI / SCLK / CS | SPI interface | Standard 4-wire SPI with 8 MHz max clock rate; supports daisy-chaining multiple sensors via shared SCLK/MOSI/MISO and individual CS lines. |
| TEST/VPP | Factory programming voltage | Must be tied to VSS in application - no user-accessible programming or debug functionality. |
Key Features
| Feature | Design Value |
|---|---|
| Independent axis arming | Each axis (X/Y) has dedicated ARM_X/ARM_Y outputs with programmable thresholds and response modes - eliminates need for external logic to prioritize crash direction. |
| Offset cancellation | Automated correction with <0.25 LSB/s slew rate and >6.2 s averaging period - maintains zero-g accuracy across temperature and aging without host MCU intervention. |
| AEC-Q100 Grade 1 | Qualified for automotive use with 100% final test at −40 °C to +105 °C - meets functional safety requirements for airbag control units without additional qualification effort. |
| Self-test with OTP trim | Factory-programmed STDEFL_X/STDEFL_Y registers store nominal deflection values - enables field verification of sensor health against known reference without external stimulus. |
| Over-damped lateral sensing element | Natural frequency 10.8–15.9 kHz with damping ratio 2.46–9.36 - suppresses resonance artifacts during high-frequency crash pulses for clean, interpretable output. |
Applications
| Frontal Collision Detection | Side-Impact Sensing |
|---|---|
Use Scenario: Vehicle deceleration exceeding 40 g within 15 ms during head-on crash. IC Role / Device Role / Timing Role: Primary acceleration trigger for airbag inflation decision in central SRS controller. Use Value: ±120 g range avoids clipping during high-speed impacts; 12-bit resolution enables precise timing of squib firing relative to crash pulse peak. | Use Scenario: Lateral acceleration >25 g from T-bone collision detected by door-mounted sensor. IC Role / Device Role / Timing Role: Dedicated side-impact sensor feeding local airbag module via isolated SPI bus. Use Value: Independent ARM_Y output asserts within 1.6 ms (1000 Hz LPF) to initiate curtain airbag deployment before occupant contacts door panel. |
| Roll-Over Detection | Crash Data Recorder Trigger |
Use Scenario: Sustained lateral acceleration >15 g for >50 ms during vehicle rollover event. IC Role / Device Role / Timing Role: Secondary sensor in rollover algorithm, cross-checked with yaw rate and seat position inputs. Use Value: Twelve LPF options allow tuning to slow-roll vs. tumble dynamics; offset cancellation ensures baseline stability during prolonged cornering prior to rollover. | Use Scenario: Pre-crash acceleration spike (>5 g for >20 ms) captured for EDR event reconstruction. IC Role / Device Role / Timing Role: High-fidelity data source for black-box recording, synchronized with CAN timestamp. Use Value: 12-bit signed SPI output provides full dynamic range for post-event analysis; AEC-Q100 qualification guarantees data integrity under harsh ECU environment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-axis automotive accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMA6525KCWR2 | ±105 g full-scale range; identical pinout, SPI interface, and package. | Lower range suits compact vehicles or lower-speed crash criteria where 120 g margin is unnecessary. | Select when system-level crash testing confirms ±105 g suffices - reduces sensitivity to noise while maintaining same layout and firmware. |
| ADXL372WBCPZ-RL7 | 2000 g range, 2.5 V supply only, I²C/SPI dual interface, different 3.3 mm × 3.3 mm LGA package. | Targeted at high-g event detection (e.g., helmet sensors), not airbag deployment; lacks AEC-Q100 Grade 1 certification. | Not suitable for SRS replacement; consider only for non-safety-critical crash analytics or industrial shock monitoring. |
Compared with MMA6525KCWR2, MMA6527KCWR2 adds 14% full-scale headroom for extreme crash validation; versus ADXL372WBCPZ-RL7, it provides certified automotive safety operation, dual-axis matched response, and seamless integration into existing NXP-based SRS platforms.
Availability
MMA6527KCWR2 is available at Aetrix Electronics and suitable for automotive airbag control units, rollover detection modules, and crash data recorders requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for MMA6527KCWR2 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 applications, with leadership in automotive MCUs, radar, and inertial sensing.
The MMA65xx family was designed specifically for automotive SafetyAssure applications, delivering high-reliability, AEC-Q100-qualified inertial sensing for airbag deployment, rollover detection, and electronic stability control systems.
FAQ
What is the full-scale range of the MMA6527KCWR2?
The MMA6527KCWR2 has a ±120 g full-scale range on both the X and Y axes, as confirmed in the ordering information table and electrical characteristics section of the NXP MMA65xx datasheet Rev. 9.0. This range is factory-configured and cannot be altered in-system. It enables reliable detection of high-magnitude crash events required for advanced airbag algorithms without signal saturation.
Does the MMA6527KCWR2 support both 3.3 V and 5 V supply voltages?
Yes, the MMA6527KCWR2 supports single-supply operation at either 3.3 V or 5.0 V, as specified in the Features section and Electrical Characteristics Table 2.2. The device includes internal regulators (VREG, VREGA) and power supply monitors for both rails, ensuring robust operation across automotive ECU voltage domains without external level-shifting circuitry.
How is the MMA6527KCWR2 qualified for automotive safety applications?
The MMA6527KCWR2 is qualified to AEC-Q100 Revision G Grade 1 (−40 °C to +105 °C), with 100% final test coverage and functional safety features including CRC-protected registers, self-test with OTP-trimmed references, and independent arming outputs. It is part of NXP's SafeAssure portfolio, explicitly designed for airbag system deployment per ISO 26262 ASIL-B readiness.
What are the key timing parameters for the SPI interface of the MMA6527KCWR2?
The MMA6527KCWR2 SPI interface operates up to 8 MHz (fOSC/1), with minimum SCLK period of 120 ns, tACCESS ≤ 60 ns, and tVALID ≤ 35 ns. These values are validated across temperature and voltage ranges per Table 2.7. The interface supports standard mode (CPOL=0, CPHA=0) and includes internal pull-up/pull-down on CS/SCLK/MOSI for robust bus initialization.
Can the MMA6527KCWR2 perform offset cancellation autonomously?
Yes, the MMA6527KCWR2 implements autonomous offset cancellation with >6.2 s averaging period and <0.25 LSB/s slew rate, as specified in Section 2.4 (Parameter #125). Once enabled via DEVCFG register, it continuously corrects zero-g drift without host MCU involvement - critical for maintaining accuracy across temperature cycles and long-term vehicle service life.
MMA6527KCWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-QFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Digital
- Axis:
- X, Y
- Acceleration Range:
- ±120g
- Sensitivity (LSB/g):
- 16 (±120g)
- Sensitivity (mV/g):
- -
- Bandwidth:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 3.135V ~ 5.25V
- Features:
- Selectable Low Pass Filter
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (6x6)
MMA6527KCWR2 FAQ
1.How can I place an order for MMA6527KCWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA6527KCWR2 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 MMA6527KCWR2 reliable?
The price and inventory of MMA6527KCWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA6527KCWR2 is usually 5 days.
3.What payment methods are accepted for MMA6527KCWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA6527KCWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA6527KCWR2?
MMA6527KCWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA6527KCWR2 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 MMA6527KCWR2?
For technical support, including MMA6527KCWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA6527KCWR2 requirements.
6.How does Aetrix verify that MMA6527KCWR2 is sourced from the original manufacturer or authorized distributors?
All MMA6527KCWR2 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 MMA6527KCWR2 meets industry standards.
7.What is the process for return or replacement of MMA6527KCWR2?
All MMA6527KCWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA6527KCWR2, 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 MMA6527KCWR2 part is unused and in its original packaging.
Return procedure for MMA6527KCWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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