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NXP Semiconductors MMA6222AKEG
- Part No.:
- MMA6222AKEG
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MMA6222AKEG.pdf
- Description:
- ACCELEROMETER 20G ANALOG 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,528
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Product details
Overview
MMA6222AKEG from Freescale Semiconductor is a dual-axis (X/Y) analog-output silicon capacitive accelerometer with full digital signal processing, ±20g full-scale range per axis, ratiometric voltage output, and AEC-Q100 Grade 2 qualification (-40°C to +105°C) for automotive crash detection systems.
For engineers reviewing the MMA6222AKEG datasheet, MMA6222AKEG pinout, MMA6222AKEG application, or MMA6222AKEG equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in airbag deployment, and validated alternative options for functional replacement in safety-critical analog sensing designs.
Technical Context
The MMA6222AKEG integrates dual micromachined g-cells with on-chip DSP performing offset trimming, gain calibration, low-pass filtering (4-pole, 400 Hz cutoff), and ratiometric DAC conversion - all operating from a single 3.3 V or 5 V supply. Its over-damped transducer design suppresses resonance-induced measurement error during high-slew shock events.
It features dedicated analog power domains (VSSA, CREGA, CREF), internal self-test activation via ST pin, system-wide synchronization via CAP/HOLD, and fault reporting through STATUS pin - supporting fail-safe integration into airbag control units where deterministic timing and diagnostic coverage are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±20g per axis (X and Y independently specified) |
| Analog Output Type | Ratiometric voltage output (XOUT/YOUT proportional to VCC) |
| Low-Pass Filter | 4-pole, 400 Hz cutoff (–4 dB point); supports additional filter options |
| Supply Voltage | 3.3 V or 5 V single supply (operating range: 3.15–3.45 V or 4.75–5.25 V) |
| Operating Temperature | –40°C to +105°C (AEC-Q100 Rev. F Grade 2 qualified) |
| Output Noise Density | 1.1 mg/√Hz (1 Hz to 1 kHz bandwidth) |
| Nonlinearity | ±1% of full-scale range (FSR) |
| Self-Test Output Shift | +10% to +18% of full-scale output (temperature-compensated) |
Pinout & Package
Pb-free 20-pin SOIC package (Case 475A-02, 7.5 mm × 12.8 mm body, 1.27 mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 11, 19, 20 | N/C | No internal connection; must be left unconnected or tied to ground per layout guidelines |
| 2, 8 | VSS / VSSA | Digital and analog ground returns - separate planes required for noise isolation |
| 4 | VCC | Main supply input (3.3 V or 5 V); requires external bypass capacitor to VSS |
| 5, 10 | XOUT / YOUT | Ratiometric analog voltage outputs (0.46×VCC to 0.54×VCC at 0g; ±20g range) |
| 6, 12 | CREG / CREGA | Digital/analog internal regulator filter pins; require 800–1000 nF low-ESR capacitors to VSS/VSSA |
| 7, 13, 14 | CREF / CREF / CREGA | Internal reference voltage node; dual CREF pins support redundant decoupling for reliability |
| 9 | CAP/HOLD | Freezes latest acceleration sample on rising edge; enables synchronized multi-sensor capture |
| 15 | SCLK | Unused in normal operation; used only with RESET to initiate hardware reset (512 μs low pulse) |
| 16 | CREGA | Second analog regulator rail pin - paralleled with Pin 12 for enhanced PSRR and stability |
| 17 | RESET | Active-low hardware reset; internal pull-up; asserts internal reset when held low with SCLK high |
| 18 | STATUS | Open-drain fault indicator (high on parity error, over-temperature, clock fault, or reset) |
| 19 | ST | Self-test activation (high) and STATUS latch clear (low-to-high transition) |
Key Features
| Feature | Design Value |
|---|---|
| Over-damped transducer | Eliminates resonant peaking in crash pulse response; ensures stable analog output under high-slew shock |
| On-chip temperature sensor | Enables real-time thermal compensation of offset and sensitivity without external components |
| Dedicated CAP/HOLD input | Allows precise time-aligned sampling across multiple sensors in airbag control units |
| Integrated voltage regulator | Provides stable internal analog/digital rails independent of VCC ripple; reduces external BOM count |
| AEC-Q100 Grade 2 qualification | Validated for automotive under-hood environments including extended temperature cycling and ESD robustness |
| Internal self-test | Electrically stimulates g-cell to verify signal chain integrity without mechanical stimulus or external test equipment |
Applications
| Crash Detection (Airbag) | Impact Monitoring (Industrial) |
|---|---|
|
Use Scenario: Real-time vehicle deceleration monitoring during frontal/side collisions to trigger airbag deployment within 20 ms. IC Role / Device Role / Timing Role: Primary analog acceleration sensor feeding ADC in airbag control unit; provides ratiometric X/Y outputs synchronized via CAP/HOLD. Use Value: ±20g range and 400 Hz filter match FMVSS 208 crash pulse profiles; AEC-Q100 Grade 2 ensures reliability in under-hood mounting locations. |
Use Scenario: Continuous vibration and impact logging on heavy machinery to detect bearing failure or structural fatigue. IC Role / Device Role / Timing Role: Dual-axis analog front-end for data logger; outputs sampled at 1 kHz with hold capability for burst-mode capture. Use Value: Low 1.1 mg/√Hz noise and ±1% nonlinearity enable accurate RMS acceleration calculation; over-damped response prevents aliasing on impulsive shocks. |
| Shock Detection (Consumer Electronics) | Orientation Sensing (Safety Systems) |
|
Use Scenario: Detecting drop events in portable medical devices to trigger protective shutdown or data backup. IC Role / Device Role / Timing Role: Shock event detector with programmable threshold; STATUS pin signals fault or overrange condition to host MCU. Use Value: ±800 g survival rating and ±1500 g powered shock tolerance ensure survivability during accidental drops; self-test validates functionality pre-deployment. |
Use Scenario: Tilt and static orientation monitoring in elevator safety controllers to detect free-fall or overspeed conditions. IC Role / Device Role / Timing Role: Dual-axis DC-coupled accelerometer providing gravity-referenced X/Y output for angle calculation. Use Value: 0g offset accuracy (±4% of VCC) and <±1% FSR nonlinearity enable sub-degree tilt resolution; CREF-stabilized DACs maintain ratio-metric accuracy across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-axis analog accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMA6255AKEG | ±50g full-scale range per axis; identical pinout, package, and interface | Higher dynamic range suitable for rollover detection or heavy-vehicle crash sensing | Select when system requires >±20g measurement headroom without changing PCB layout or firmware |
| ADXL206ARZ | Single-axis, 5 V only, 2.5 V fixed reference (non-ratiometric); SOIC-8 package | Lacks dual-axis integration, CAP/HOLD, and AEC-Q100 qualification | Use only in non-automotive, lower-performance industrial monitoring where cost and size outweigh safety certification needs |
Compared with MMA6222AKEG, MMA6255AKEG offers direct pin-compatible scaling to ±50g while retaining identical diagnostics and timing behavior; ADXL206ARZ requires redesign of analog interface, power architecture, and safety validation due to missing automotive qualification and dual-axis capability.
Availability
MMA6222AKEG is available at Aetrix Electronics and suitable for automotive crash detection, industrial impact monitoring, and consumer drop-sensing applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MMA6222AKEG 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) was a leading designer of automotive and industrial microcontrollers, sensors, and analog ICs, known for high-reliability embedded solutions.
The MMA62XXAKEG series was developed specifically for automotive safety systems, delivering integrated signal conditioning, diagnostic features, and AEC-Q100 qualification in a single analog-output accelerometer IC.
FAQ
What is the full-scale range of the MMA6222AKEG?
The MMA6222AKEG has a ±20g full-scale range on both the X and Y axes, independently specified and trimmed at production. This range is optimized for automotive crash pulse detection per FMVSS 208 requirements. The device maintains linearity within ±1% FSR across its operating temperature range of –40°C to +105°C, and its ratiometric output scales directly with VCC to minimize supply-induced errors. MMA6222AKEG does not support user-configurable range selection - range is fixed at manufacture.
Does the MMA6222AKEG support digital communication interfaces like SPI or I²C?
No, the MMA6222AKEG does not support SPI, I²C, or any serial digital interface. Its interface is strictly analog: XOUT and YOUT provide continuous ratiometric voltage outputs. The SPI port described in some documentation is disabled in normal operation; pins SCLK and CS are repurposed for hardware reset and status signaling only. MMA6222AKEG relies on external ADCs for digitization, and uses CAP/HOLD, STATUS, and ST for system-level synchronization and diagnostics instead of packet-based communication.
How is the MMA6222AKEG qualified for automotive use?
The MMA6222AKEG is qualified to AEC-Q100 Revision F Grade 2, covering operation from –40°C to +105°C ambient temperature, plus stress testing for ESD (HBM ±2000 V), latch-up immunity, and accelerated life testing. It includes built-in diagnostics such as STATUS pin fault reporting (for parity errors, over-temperature, clock faults), internal self-test, and power-on reset monitoring - all required for ASIL-B–capable airbag systems. MMA6222AKEG's Pb-free SOIC package and traceable manufacturing meet automotive PPAP requirements.
What is the purpose of the CAP/HOLD pin on the MMA6222AKEG?
The CAP/HOLD pin freezes the current acceleration sample at the DAC output stage: a low-to-high transition captures and holds the latest XOUT/YOUT values until the next update cycle. This enables precise time-aligned sampling across multiple MMA6222AKEG devices or with other sensors in a distributed airbag control unit. If unused, CAP/HOLD may be tied directly to VSS. MMA6222AKEG does not support continuous streaming mode - output updates only occur when CAP/HOLD is low, making it ideal for synchronized burst acquisition rather than real-time waveform capture.
Can the MMA6222AKEG operate from a 3.3 V supply?
Yes, the MMA6222AKEG supports both 3.3 V and 5 V single-supply operation. At 3.3 V, the valid operating range is 3.15 V to 3.45 V; at 5 V, it is 4.75 V to 5.25 V. All specifications - including output swing (0.46×VCC to 0.54×VCC at 0g), noise density (1.1 mg/√Hz), and self-test shift (+10% to +18% FS) - are guaranteed across both supply ranges. The internal voltage regulator and separate VSSA/VSS rails ensure analog performance remains stable regardless of supply choice. MMA6222AKEG requires no configuration change between 3.3 V and 5 V operation.
MMA6222AKEG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA62XXAKEG
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- Type:
- Analog
- Axis:
- X, Y
- Acceleration Range:
- ±20g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 23.40mV/V/g
- Bandwidth:
- 3kHz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 3.13V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
MMA6222AKEG FAQ
1.How can I place an order for MMA6222AKEG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA6222AKEG 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 MMA6222AKEG reliable?
The price and inventory of MMA6222AKEG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA6222AKEG is usually 5 days.
3.What payment methods are accepted for MMA6222AKEG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA6222AKEG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA6222AKEG?
MMA6222AKEG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA6222AKEG 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 MMA6222AKEG?
For technical support, including MMA6222AKEG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA6222AKEG requirements.
6.How does Aetrix verify that MMA6222AKEG is sourced from the original manufacturer or authorized distributors?
All MMA6222AKEG 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 MMA6222AKEG meets industry standards.
7.What is the process for return or replacement of MMA6222AKEG?
All MMA6222AKEG units undergo pre-shipment inspection (PSI). If there is an issue with MMA6222AKEG, 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 MMA6222AKEG part is unused and in its original packaging.
Return procedure for MMA6222AKEG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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