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NXP Semiconductors MMA6827BKCWR2
- Part No.:
- MMA6827BKCWR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA6827BKCWR2.pdf
- Description:
- ACCELEROMETER 120G SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,654
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Product details
Overview
MMA6827BKCWR2 from NXP Semiconductors is a dual-axis, SPI-interface, over-damped lateral accelerometer with ±120 g full-scale range on both X and Y axes, 10-bit digital output, and AEC-Q100 Grade 1 qualification for automotive airbag deployment systems.
For engineers reviewing the MMA6827BKCWR2 datasheet, MMA6827BKCWR2 pinout, MMA6827BKCWR2 application, or MMA6827BKCWR2 equivalent, key selection criteria include its independent axis arming capability, twelve programmable low-pass filter options (50–1000 Hz), offset cancellation with <0.25 LSB/s slew rate, and Pb-free 16-pin QFN (6 mm × 6 mm × 1.98 mm) package.
Technical Context
The MMA6827BKCWR2 integrates two over-damped MEMS g-cells with natural frequency 10.8–15.9 kHz and damping ratio 2.46–9.36, coupled to ΣΔ converters, SINC filters, and configurable IIR low-pass filtering. Its digital signal path supports 10-bit signed/unsigned SPI output at sample rates determined by internal 7.6–8.4 MHz oscillator division.
Each axis features independent programmable arming logic with moving-average or unfiltered activation modes, plus configurable PCM or open-drain ARM_X/ARM_Y outputs. Internal voltage regulators (VREG = 2.50 V ±0.08 V, VREGA = 2.50 V ±0.08 V) supply analog and digital domains separately, with undervoltage monitoring thresholds at 2.10 V (VREG) and 2.20 V (VREGA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±120 g on both X and Y axes - enables detection of high-deceleration crash events in frontal/side-impact airbag triggers |
| Digital Output Resolution | 10-bit signed or unsigned SPI - provides 1024 discrete levels with zero-g centered at 512 (unsigned) or 0 (signed) |
| 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-shifting |
| Operating Temperature | −40 °C to +105 °C (100% final test verified) - meets AEC-Q100 Grade 1 requirements for under-hood airbag control units |
| Package | 16-pin QFN, 6 mm × 6 mm × 1.98 mm, Pb-free - surface-mount compatible with automated reflow and suitable for space-constrained airbag ECU modules |
| Power Consumption | 4.0–9.0 mA typical - enables low-power operation during vehicle standby while maintaining readiness for crash detection |
Pinout & Package
Pb-free 16-pin QFN package, 6 mm × 6 mm × 1.98 mm body with exposed thermal pad (internally connected to VSS). Pin 1 marked via top-side laser marking; bottom view shows VREGA–VSS–N/C–VSSA–N/C–VSSA–TEST/VPP–MISO–MOSI–SCLK–VCC–VSS–VREG–ARM_X/PCM_X–CS–ARM_Y/PCM_Y–PAD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREGA, VSSA (Pins 1, 13, 16) | Analog power and ground | Separate analog domain for sensor front-end; requires 1 μF ceramic capacitor (C3) between VREGA and VSSA |
| VREG, VSS (Pins 3, 2, 4, 12) | Digital power and ground | Supplies digital logic and SPI interface; requires 1 μF capacitor (C2) between VREG and VSS |
| VCC, VSS (Pins 9, 2, 4, 12) | Main supply and return | Primary 3.3 V/5 V input; requires 0.1 μF decoupling capacitor (C1) between VCC and VSS |
| ARM_X/PCM_X, ARM_Y/PCM_Y (Pins 5, 6) | Configurable axis output | Programmable as open-drain arming signal (active-low/high) or PCM output proportional to acceleration - directly drives airbag squib enable logic |
| SPI Interface (Pins 8, 10, 11, 12) | Serial data path | MISO/MOSI/SCLK/CS support standard SPI mode 0 (CPOL=0, CPHA=0); CS has internal pullup, SCLK/MOSI have internal pulldowns |
| TEST/VPP (Pin 7) | Factory programming | Must be tied to VSS in application; not used during normal operation or field programming |
Key Features
| Feature | Design Value |
|---|---|
| Independent axis arming | Each axis (X/Y) has dedicated ARM_X/ARM_Y output with programmable threshold, averaging, and response mode - enables asymmetric crash detection logic for side vs. frontal impact |
| Offset cancellation | On-chip >6.2 s averaging with <0.25 LSB/s slew rate - eliminates thermal drift-induced false triggers without external calibration circuitry |
| AEC-Q100 Grade 1 qualification | Validated across −40 °C to +125 °C ambient, including 100% final test at TA = −40 °C/+105 °C - ensures reliability in harsh automotive environments |
| Over-damped MEMS sensing element | Damping ratio 2.46–9.36 and natural frequency 10.8–15.9 kHz - suppresses resonance artifacts during high-slew crash pulses, improving signal fidelity |
| Self-test capability | Two-level electrostatic self-test (ΔSTLow = 10.68–18.75 g, ΔSTHI = 21.37–39.38 g) with cross-axis monitoring - enables in-system functional verification per ISO 26262 ASIL-B requirements |
Applications
| Frontal Impact Airbag Trigger | Side-Impact Curtain Deployment |
|---|---|
Use Scenario: Detects rapid deceleration (>20 g) during head-on collisions to initiate driver/passenger airbag inflation within 20 ms. IC Role / Device Role / Timing Role: Primary crash sensor providing real-time X-axis acceleration data via SPI to airbag control unit (ACU); ARM_X output asserts within 1.05–6.58 μs of threshold crossing. Use Value: ±120 g range and 400 Hz LPF option capture full crash pulse profile without clipping; over-damped design prevents resonance-induced false positives. | Use Scenario: Monitors lateral acceleration during T-bone or rollover events to deploy side curtain airbags before occupant contact with door pillar. IC Role / Device Role / Timing Role: Dual-axis sensor delivering synchronized X/Y acceleration data; ARM_Y output triggers curtain squib drivers independently of frontal logic. Use Value: Independent ±120 g Y-axis range and programmable arming thresholds enable precise side-impact discrimination; 12 LPF options allow tuning to vehicle-specific B-pillar response dynamics. |
| Seat Belt Pretensioner Activation | Electronic Stability Control (ESC) Backup Sensor |
Use Scenario: Triggers pretensioner motors during moderate-to-severe frontal impacts to remove slack before airbag deployment. IC Role / Device Role / Timing Role: Secondary acceleration monitor interfaced to ESC module; uses PCM_Y output for analog-like proportional feedback to pretensioner control algorithm. Use Value: PCM output mode provides continuous 10-bit resolution acceleration data (not just threshold-triggered signals), enabling predictive pretensioning based on crash severity gradient. | Use Scenario: Provides redundant lateral acceleration measurement in ESC systems where primary sensors may be compromised (e.g., collision damage). IC Role / Device Role / Timing Role: Fail-operational backup sensor feeding Y-axis data to ESC MCU via SPI; operates continuously with <0.5 LSB RMS noise at 400 Hz LPF. Use Value: AEC-Q100 qualification and on-chip offset cancellation ensure long-term stability and accuracy without recalibration, meeting ASIL-C diagnostic coverage requirements. |
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 |
|---|---|---|---|
| MMA6826BKCWR2 | ±60 g full-scale range on both axes; identical pinout, SPI interface, and package | Lower range suits restraint systems requiring finer resolution at lower g-levels (e.g., knee airbags, pedestrian protection) | Select when system crash pulse analysis indicates peak deceleration remains below ±70 g; retains same layout and firmware compatibility |
| ADXL312WBRMZ-RL | 3-axis, 13-bit output, I²C/SPI interface; ±1.5 g to ±12 g range; RoHS-compliant LFCSP package | Designed for non-safety-critical consumer/industrial motion sensing; lacks AEC-Q100 qualification and arming outputs | Only suitable for prototyping or non-automotive applications; not qualified for airbag deployment due to missing safety mechanisms and qualification |
Compared with MMA6826BKCWR2 and ADXL312WBRMZ-RL, the MMA6827BKCWR2 uniquely delivers ±120 g dual-axis range with integrated arming outputs and AEC-Q100 Grade 1 compliance - making it the only option qualified for production airbag control units requiring high-g crash detection and functional safety certification.
Availability
MMA6827BKCWR2 is available at Aetrix Electronics and suitable for automotive airbag control units, seat belt pretensioner modules, and electronic stability control backup systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MMA6827BKCWR2 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 MMA68xx product line is designed specifically for automotive safety-critical applications, delivering high-reliability, AEC-Q100-qualified inertial sensors with integrated signal conditioning, diagnostics, and arming outputs for airbag and restraint system controllers.
FAQ
What is the full-scale range specification for the MMA6827BKCWR2?
The MMA6827BKCWR2 has a ±120 g full-scale range on both the X-axis and Y-axis, as confirmed in the ordering information table and electrical characteristics section of the NXP MMA68xx datasheet Rev. 9.0. This range is factory-configured and fixed for this specific part number, enabling detection of high-magnitude crash events required for airbag deployment algorithms.
Does the MMA6827BKCWR2 support both 3.3 V and 5 V supply voltages?
Yes, the MMA6827BKCWR2 supports single-supply operation at either 3.3 V or 5.0 V, with specified operating ranges of +3.135 V to +3.45 V and +4.75 V to +5.25 V respectively. The device includes internal regulators (VREG and VREGA) that maintain stable 2.50 V ±0.08 V supplies regardless of input voltage, ensuring consistent sensor performance across both supply options.
How does the offset cancellation function work in the MMA6827BKCWR2?
The MMA6827BKCWR2 implements on-chip offset cancellation with a >6.29 s averaging period and <0.25 LSB/s slew rate, as specified in parameter #119 of the datasheet. This feature continuously corrects for thermal drift and mechanical stress-induced offsets without requiring external calibration, using internal registers (OFFCORR_X/OFFCORR_Y) updated at ~1.05 Hz to maintain zero-g accuracy over temperature and time.
What are the key differences between the MMA6827BKCWR2 and MMA6826BKCWR2?
The primary difference is full-scale range: MMA6827BKCWR2 is ±120 g on both axes, while MMA6826BKCWR2 is ±60 g on both axes. All other specifications-including pinout, SPI interface, package, AEC-Q100 qualification, and arming functionality-are identical. This makes MMA6826BKCWR2 a direct layout-compatible alternative when lower-range sensitivity is sufficient for the target crash pulse profile.
Is the MMA6827BKCWR2 qualified for automotive safety applications?
Yes, the MMA6827BKCWR2 is qualified to AEC-Q100 Revision G, Grade 1 (−40 °C to +125 °C), with 100% final test verification across the full operating temperature range. It includes built-in diagnostics such as offset monitoring, CRC-protected register arrays, self-test capability, and power supply monitoring-meeting functional safety requirements for ASIL-B compliant airbag control units.
MMA6827BKCWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-QFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Digital
- Axis:
- X, Y
- Acceleration Range:
- ±120g
- Sensitivity (LSB/g):
- 4.096
- Sensitivity (mV/g):
- -
- Bandwidth:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 3.135V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (6x6)
MMA6827BKCWR2 FAQ
1.How can I place an order for MMA6827BKCWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA6827BKCWR2 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 MMA6827BKCWR2 reliable?
The price and inventory of MMA6827BKCWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA6827BKCWR2 is usually 5 days.
3.What payment methods are accepted for MMA6827BKCWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA6827BKCWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA6827BKCWR2?
MMA6827BKCWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA6827BKCWR2 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 MMA6827BKCWR2?
For technical support, including MMA6827BKCWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA6827BKCWR2 requirements.
6.How does Aetrix verify that MMA6827BKCWR2 is sourced from the original manufacturer or authorized distributors?
All MMA6827BKCWR2 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 MMA6827BKCWR2 meets industry standards.
7.What is the process for return or replacement of MMA6827BKCWR2?
All MMA6827BKCWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA6827BKCWR2, 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 MMA6827BKCWR2 part is unused and in its original packaging.
Return procedure for MMA6827BKCWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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