My Inquiry
My Account
NXP Semiconductors MMA6826BKWR2
- Part No.:
- MMA6826BKWR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA6826BKWR2.pdf
- Description:
- ACCELEROMETER 60G SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,442
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMA6826BKWR2 from Freescale Semiconductor is a dual-axis SPI inertial sensor designed for automotive airbag deployment systems, featuring ±60g full-scale range on both X and Y axes, 10-bit signed/unsigned SPI output, and over-damped lateral sensing architecture compliant with AEC-Q100 Grade 1.
For engineers reviewing the MMA6826BKWR2 datasheet, MMA6826BKWR2 pinout, MMA6826BKWR2 application, or MMA6826BKWR2 equivalent, this page delivers verified technical context, exact pin functions, automotive-grade timing behavior, low-pass filter configuration options, and validated alternatives for airbag system design.
Technical Context
The MMA6826BKWR2 integrates two independent over-damped MEMS g-cells with natural frequency 10.8–15.9 kHz and damping ratio 2.46–9.36, enabling robust crash detection without resonance-induced false triggers. Its digital signal path includes ΣΔ conversion, SINC filtering, and configurable 4-pole/3-pole IIR low-pass filters (50 Hz to 1000 Hz).
It operates from 3.3 V or 5.0 V supply, supports SPI clock up to 1 MHz, and provides programmable arming outputs (ARM_X/ARM_Y) with open-drain configuration for direct connection to airbag controller interrupt inputs - all while maintaining AEC-Q100 Rev. G qualification across −40°C to +105°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±60g on both X and Y axes - enables precise discrimination of moderate-to-severe frontal/side impacts in airbag algorithms. |
| Digital Output Resolution | 10-bit signed or unsigned SPI data - provides 1024 discrete levels with zero-g at 0 (signed) or 512 (unsigned) LSB. |
| Sensitivity | 8.192 LSB/g (X & Y) - yields ±491.5 LSB full-scale swing, supporting high-precision acceleration quantization. |
| Low-Pass Filter Options | 12 selectable cutoffs (50 Hz–1000 Hz, 4-pole/3-pole) - allows tuning noise rejection vs. response latency per vehicle dynamics model. |
| Supply Voltage | 3.3 V or 5.0 V single supply - compatible with legacy 5 V automotive microcontrollers and modern 3.3 V safety MCUs. |
| Operating Temperature | −40°C to +105°C - qualified per AEC-Q100 Grade 1 for under-hood and cabin-mounted airbag sensor placement. |
| Package | 16-pin QFN, 6 mm × 6 mm, exposed pad - supports automated optical inspection and thermal dissipation in compact modules. |
Pinout & Package
Pb-free 16-pin QFN package (6 mm × 6 mm, Case 2086-01), with exposed die attach pad internally connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREGA | Analog supply input | Provides regulated 2.5 V for analog front-end; requires 1 μF ceramic capacitor to VSSA. |
| VSS / VSSA | Digital and analog ground | Separate ground returns prevent digital noise coupling into sensitive accelerometer signals. |
| VREG | Digital supply input | Delivers regulated 2.5 V to digital logic; requires 1 μF ceramic capacitor to VSS. |
| ARM_X / PCM_X | Configurable X-axis output | Open-drain arming output or PCM signal proportional to X-axis acceleration - directly drives MCU interrupt pins. |
| ARM_Y / PCM_Y | Configurable Y-axis output | Independent arming/PCM function for Y axis - enables dual-axis trigger arbitration in airbag controllers. |
| MISO / MOSI / SCLK / CS | SPI interface | Standard 4-wire SPI with internal pullup on CS and pulldown on SCLK/MOSI - simplifies host interface design. |
| TEST/VPP | Factory programming voltage | Must be tied to VSS in application; not user-accessible during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Independent axis arming | Each axis has dedicated ARM_X/ARM_Y output with programmable threshold and averaging - enables flexible crash vector analysis. |
| Offset cancellation | On-chip offset correction with >6.2 s averaging period and <0.25 LSB/s slew rate - maintains long-term zero-g stability in varying thermal environments. |
| Self-test capability | Two-level electrostatic self-test (ΔSTLow = 10.68 g, ΔSTHI = 21.37 g) with cross-axis monitoring - validates sensor integrity before deployment. |
| Power supply monitoring | Dual undervoltage/overvoltage detection on VREG and VREGA with hysteresis - ensures reliable reset behavior during battery transients. |
| Robust mechanical rating | Withstands 1500 g powered shock and 2000 g unpowered shock - survives manufacturing handling and vehicle crash events. |
Applications
| Frontal Impact Detection | Side-Impact Sensing |
|---|---|
Use Scenario: Detects rapid deceleration during head-on collisions using X-axis acceleration profile. IC Role / Device Role / Timing Role: Primary crash sensor providing real-time 10-bit SPI data and hardware arming signal to airbag control unit. Use Value: ±60g range and 400 Hz LPF option deliver optimal signal-to-noise ratio for distinguishing crash pulses from road noise. | Use Scenario: Monitors lateral acceleration during T-bone or rollover events via Y-axis measurement. IC Role / Device Role / Timing Role: Dual-axis companion sensor enabling vector-based deployment decisions in multi-airbag systems. Use Value: Independent Y-axis arming output and identical ±60g range ensure symmetrical response for side-curtain and seatbelt pretensioner triggering. |
| Passenger Presence Verification | Crash Pulse Validation |
Use Scenario: Detects occupant-induced vibrations during pre-crash braking to support weight-class adaptive inflation. IC Role / Device Role / Timing Role: Secondary inertial monitor feeding low-frequency motion data to occupant classification algorithm. Use Value: Configurable 50 Hz LPF and offset cancellation maintain accuracy during sustained low-g maneuvers. | Use Scenario: Validates primary crash signal against secondary mechanical signature using cross-axis correlation. IC Role / Device Role / Timing Role: Redundant sensing element with independent signal chain and fault reporting (DEVSTAT register). Use Value: Built-in offset monitor and CRC-protected register array detect drift or corruption before false deployment. |
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 |
|---|---|---|---|
| NXP MMA6823BKWR2 | ±120g X-axis / ±60g Y-axis range; otherwise identical architecture, pinout, and SPI interface. | Requires recalibration of X-axis thresholds in airbag ECU firmware due to asymmetric range. | Select when higher X-axis impact tolerance is needed without changing PCB layout. |
| STMicroelectronics LIS344ALH | 3-axis, I²C/SPI interface, ±6g/±12g/±24g ranges; lacks AEC-Q100 Grade 1 qualification and arming outputs. | Not suitable for primary airbag deployment; limited to supplemental sensing or non-safety subsystems. | Consider only for cost-sensitive non-critical applications where AEC-Q100 compliance is not required. |
Compared with MMA6823BKWR2, the MMA6826BKWR2 offers matched ±60g sensitivity on both axes for simplified dual-axis algorithm development; compared with LIS344ALH, it delivers certified functional safety readiness, deterministic arming latency, and automotive-grade reliability.
Availability
MMA6826BKWR2 is available at Aetrix Electronics and suitable for automotive airbag systems, crash event recorders, and occupant classification modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant inertial sensing.
Supply support for MMA6826BKWR2 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
Freescale Semiconductor (now part of NXP Semiconductors) is a global leader in automotive microcontrollers and sensors, specializing in ASIL-capable safety ICs.
The MMA68xx family was engineered specifically for automotive airbag control units, delivering SafeAssure-certified performance with integrated arming outputs, AEC-Q100 Grade 1 qualification, and crash-robust mechanical design.
FAQ
What is the full-scale range of the MMA6826BKWR2 on each axis?
The MMA6826BKWR2 has a ±60g full-scale range on both the X-axis and Y-axis, as confirmed in the Ordering Information table and Electrical Characteristics section of the Freescale MMA68xx datasheet Rev. 5. This symmetric range enables consistent crash pulse interpretation across orthogonal directions in airbag deployment logic.
Does the MMA6826BKWR2 support both 3.3 V and 5 V operation?
Yes, the MMA6826BKWR2 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. Internal regulators (VREG and VREGA) generate stable 2.5 V supplies regardless of input voltage, ensuring consistent analog and digital performance.
How is the arming output configured on the MMA6826BKWR2?
The MMA6826BKWR2 provides two configurable arming outputs: ARM_X and ARM_Y. Each is set via the DEVCFG register's A_CFG[2:0] bits and can operate as an open-drain active-low or active-high output with programmable pullup/pulldown current, or as a PCM output proportional to acceleration - all without external components.
What low-pass filter options does the MMA6826BKWR2 offer?
The MMA6826BKWR2 provides twelve low-pass filter options: six at 8 μs sampling interval (100 Hz to 1000 Hz, 4-pole) and six at 16 μs interval (50 Hz to 500 Hz, 4-pole), plus two 3-pole variants. Cutoff frequencies are selected independently per axis via LPF_X[3:0] and LPF_Y[3:0] register bits.
Is the MMA6826BKWR2 qualified to AEC-Q100 standards?
Yes, the MMA6826BKWR2 is qualified to AEC-Q100 Revision G, Grade 1 (−40°C to +125°C junction temperature), with full characterization across −40°C to +105°C ambient. This qualification covers thermal cycling, humidity testing, mechanical shock, and ESD (±2000 V HBM), confirming suitability for automotive airbag systems.
MMA6826BKWR2 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:
- ±60g
- Sensitivity (LSB/g):
- 8.192
- 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)
MMA6826BKWR2 FAQ
1.How can I place an order for MMA6826BKWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA6826BKWR2 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 MMA6826BKWR2 reliable?
The price and inventory of MMA6826BKWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA6826BKWR2 is usually 5 days.
3.What payment methods are accepted for MMA6826BKWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA6826BKWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA6826BKWR2?
MMA6826BKWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA6826BKWR2 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 MMA6826BKWR2?
For technical support, including MMA6826BKWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA6826BKWR2 requirements.
6.How does Aetrix verify that MMA6826BKWR2 is sourced from the original manufacturer or authorized distributors?
All MMA6826BKWR2 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 MMA6826BKWR2 meets industry standards.
7.What is the process for return or replacement of MMA6826BKWR2?
All MMA6826BKWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA6826BKWR2, 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 MMA6826BKWR2 part is unused and in its original packaging.
Return procedure for MMA6826BKWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMA6826BKWR2 Tags
-
MXC4005XC
Memsic Inc.
-
MC3419
Memsic Inc.
-
MC3479
Memsic Inc.
-
MXC6655XA
Memsic Inc.
-
MC3630
Memsic Inc.
.jpg)
-
LIS2HH12TR
STMicroelectronics
-
KX122-1037
Kionix Inc.
-
LIS2DE12TR
STMicroelectronics
-
LIS2DH12TR
STMicroelectronics
-
MC3635
Memsic Inc.
-
LIS2DS12TR
STMicroelectronics
-
LIS3DHTR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
