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NXP Semiconductors MMA2244KEGR2
- Part No.:
- MMA2244KEGR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MMA2244KEGR2.pdf
- Description:
- ACCEL 22.5G ANALOG 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,284
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Product details
Overview
MMA2244KEGR2 from NXP (formerly Freescale) is a ±20g, low-g silicon capacitive micromachined accelerometer in SOIC-16 package, featuring integrated 4th-order Bessel low-pass filter, ratiometric linear output, and factory-calibrated self-test. It delivers 100 mV/g sensitivity at 5.0 V supply with 360 Hz –3 dB bandwidth and operates across –40°C to +105°C for automotive crash sensing and hard drive protection.
For engineers reviewing the MMA2244KEGR2 datasheet, MMA2244KEGR2 pinout, MMA2244KEGR2 application, or MMA2244KEGR2 equivalent, key selection considerations include its AEC-Q100 Grade 2 qualification, hermetically sealed wafer-level packaging, status-fault latching behavior, and absence of external passive components for filter configuration.
Technical Context
The MMA2244KEGR2 integrates a surface-micromachined polysilicon g-cell with a CMOS ASIC using switched-capacitor techniques for capacitance-to-voltage conversion, temperature compensation, and gain trimming via EPROM. Its signal path includes an on-chip 4-pole Bessel filter with fixed 360 Hz cutoff and no external RC components required.
It implements calibrated electrostatic self-test by applying voltage across a dedicated test plate to deflect the movable sensing plate, generating a known output shift (~12 g equivalent). Fault detection monitors low-voltage (trip at 3.25 V), clock frequency (150–400 kHz), and EPROM parity, latching STATUS high until reset by ST pulse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Acceleration Range | ±20 g - Full-scale measurement range centered at zero-g output (VDD/2), enabling bidirectional motion detection in vehicle crash and HDD drop-sensing applications. |
| Sensitivity | 100 mV/g (typ) at VDD = 5.0 V - Delivers precise analog voltage proportional to acceleration without scaling circuitry; ratiometric to supply ensures stability against VDD drift. |
| Bandwidth (–3 dB) | 360 Hz - Supports vibration monitoring and mechanical bearing diagnostics while rejecting high-frequency noise beyond system-relevant dynamics. |
| Self-Test Output Shift | 12 g (typ) - Generates predictable, calibrated output step to verify full signal chain integrity-mechanical transducer, ASIC, and output stage-without external stimulus. |
| Operating Temperature | –40°C to +105°C - Qualified per AEC-Q100 Rev. F Grade 2, enabling deployment in under-hood automotive and industrial embedded environments. |
| Supply Voltage | 4.75 V to 5.25 V - Specifies calibrated linear operation range; operation outside this window yields uncalibrated but functional output. |
| Output Noise (10 Hz–1 kHz) | 110 mVRMS - Defines minimum detectable acceleration resolution in low-dynamic applications like appliance control and VR input devices. |
Pinout & Package
Package: 16-lead SOIC (Case No. 475-01), Pb-free, surface-mountable with standard reflow profile. Dimensions: 9.65 mm × 5.97 mm × 1.45 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 9–13, 14–16 | No Connect (N/C) | Internally unconnected; must be left floating per datasheet-no grounding or routing required to avoid parasitic coupling. |
| 4 (ST) | Digital Input | Active-high logic input initiating self-test; internal pull-down prevents false triggering; requires ≥100 µs pulse to latch STATUS and generate calibrated output shift. |
| 5 (VOUT) | Analog Output | Ratiometric voltage output (0.45–0.55 × VDD at ±20g), buffered for direct ADC interface; requires 1 kΩ + 0.01 µF RC filter to suppress 70 kHz clock noise. |
| 6 (STATUS) | Open-drain Fault Output | Latches high on LVD, clock failure, or EPROM parity error; resets only after ST pulse unless fault persists; used for system-level diagnostic flagging. |
| 7 (VSS) | Ground Reference | Primary power return; must connect to clean, low-impedance ground plane beneath device to minimize noise coupling into sensitive analog path. |
| 8 (VDD) | Power Supply | 5 V nominal supply input; requires 0.1 µF ceramic decoupling capacitor placed adjacent to pin to suppress switching noise from internal oscillator and filter circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Wafer-Level Seal | Transducer cavity sealed during wafer fabrication-eliminates post-packaging moisture ingress and long-term drift, critical for airbag safing reliability over 15+ years. |
| Factory-Calibrated Self-Test | Delivers repeatable 12 g-equivalent output shift with <±1.0% FSO nonlinearity, enabling end-of-line and periodic field verification without mechanical actuators or external test equipment. |
| 4th-Order Bessel Filter | Preserves pulse shape integrity in transient events (e.g., crash pulses) via maximally flat group delay-ensures time-domain fidelity without phase distortion or overshoot. |
| AEC-Q100 Grade 2 Qualification | Validated for automotive use at –40°C to +105°C ambient, including 1500 g powered shock survival and 2000 g unpowered survivability-meets airbag safing and ECU mounting requirements. |
| Ratiometric Output | Output scales linearly with VDD (0.50 × VDD at zero-g); eliminates need for precision voltage reference when paired with ratiometric ADC, reducing BOM cost and layout complexity. |
Applications
| Automotive Air Bag Crash Sensing | Computer Hard Drive Protection |
|---|---|
Use Scenario: Detect rapid deceleration during frontal collision to trigger air bag deployment within strict timing windows. IC Role / Device Role / Timing Role: Primary safing sensor providing validated analog acceleration signal to airbag control unit (ACU) with fault-latched STATUS for system integrity monitoring. Use Value: AEC-Q100 Grade 2 qualification, 1500 g shock survivability, and calibrated self-test ensure reliable operation over vehicle lifetime without calibration drift or undetected failure modes. |
Use Scenario: Sense free-fall or impact events to park read/write heads before HDD platter contact. IC Role / Device Role / Timing Role: Low-latency ±20g motion detector interfacing directly to drive controller; STATUS pin signals fault conditions affecting head parking reliability. Use Value: 360 Hz bandwidth captures drop dynamics while rejecting high-frequency board vibration; ratiometric output simplifies integration with existing 5 V controller ADCs. |
| Vibration Monitoring in Industrial Appliances | Virtual Reality Motion Input |
Use Scenario: Monitor motor imbalance and bearing wear in washing machines or HVAC compressors via continuous acceleration waveform capture. IC Role / Device Role / Timing Role: Analog front-end sensor feeding microcontroller ADC; self-test verifies functionality during idle periods without interrupting operation. Use Value: 110 mVRMS noise floor enables detection of sub-0.1 g vibration harmonics; hermetic seal prevents performance degradation in humid, detergent-exposed environments. |
Use Scenario: Track head or hand orientation and gesture velocity in VR controllers requiring low-latency, low-drift motion feedback. IC Role / Device Role / Timing Role: X-axis motion transducer delivering linear analog output to MCU; STATUS pin alerts firmware to sensor faults before rendering artifacts occur. Use Value: ±20g range accommodates aggressive user motion; Bessel-filtered output preserves transient edge fidelity for accurate gesture recognition timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-g analog accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL326BCPZ | Wider ±16 g range, 3.3 V supply only, 550 Hz bandwidth, no STATUS fault pin or self-test latch. | Lacks AEC-Q100 qualification and integrated fault reporting-suitable for consumer VR or industrial monitoring where safety-critical diagnostics are not required. | Select ADXL326BCPZ when lower supply voltage and higher bandwidth are prioritized over automotive-grade reliability and built-in diagnostics. |
| MMA8452Q | I²C digital output, ±2/4/8 g selectable range, embedded FIFO, no analog VOUT or STATUS pin; 2×2×1 mm DFN package. | Requires host MCU with I²C interface and firmware for register access; lacks analog simplicity and immediate fault visibility of MMA2244KEGR2's STATUS pin. | Select MMA8452Q when digital integration, small footprint, and multi-axis capability outweigh need for analog output and hardware-level fault signaling. |
Compared with ADXL326BCPZ and MMA8452Q, the MMA2244KEGR2 uniquely combines analog ratiometric output, AEC-Q100 Grade 2 qualification, hardware-latched STATUS fault reporting, and factory-calibrated self-test in a single SOIC-16 package-making it optimal for safety-critical automotive and industrial systems requiring deterministic analog interface and zero-software diagnostic overhead.
Availability
MMA2244KEGR2 is available at Aetrix Electronics and suitable for automotive crash sensing, computer hard drive protection, and industrial vibration monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing from qualified manufacturing facilities.
Supply support for MMA2244KEGR2 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, with deep heritage in sensor technology through its acquisition of Freescale.
The MMA2244KEGR2 belongs to Freescale's legacy MMA series of analog-output accelerometers designed specifically for safety-critical automotive systems and rugged industrial motion sensing where analog simplicity, fault visibility, and long-term calibration stability are mandatory.
FAQ
What is the operating supply voltage range for the MMA2244KEGR2?
The MMA2244KEGR2 operates within a calibrated linear range of 4.75 V to 5.25 V. Outside this range, the device may still function but is not guaranteed to maintain its specified sensitivity, offset, or linearity. The low-voltage detect (LVD) circuit trips at 3.25 V (typ), asserting the STATUS pin high to indicate supply fault. This ensures the MMA2244KEGR2 remains reliable in automotive 5 V rail environments subject to load dump or cold-crank conditions.
How does the self-test function work on the MMA2244KEGR2?
The MMA2244KEGR2 uses an electrostatic self-test mechanism: applying a logic-high pulse (>100 µs) to the ST pin activates a dedicated test plate, generating a calibrated electrostatic force that deflects the movable sensing plate-producing a ~12 g-equivalent output shift at VOUT. This verifies both mechanical integrity (g-cell) and electronic signal chain (ASIC, filter, output buffer) without external hardware. The STATUS pin reflects self-test activation and latches fault conditions independently.
What does the STATUS pin indicate on the MMA2244KEGR2?
The STATUS pin on the MMA2244KEGR2 is an open-drain output that goes high to signal three fault conditions: low-voltage detection (VDD < 3.25 V), clock frequency failure (outside 150–400 kHz), or EPROM parity error. It also mirrors ST pin activity during self-test. Once latched high, STATUS remains asserted until reset by a rising edge on ST-unless the underlying fault persists. This provides hardware-level system diagnostics without MCU intervention.
Is the MMA2244KEGR2 qualified for automotive applications?
Yes, the MMA2244KEGR2 is qualified to AEC-Q100 Rev. F Grade 2, covering operation from –40°C to +105°C ambient temperature. It meets automotive reliability requirements including 1500 g powered shock survivability and 2000 g unpowered shock tolerance. Its hermetically sealed wafer-level packaging, EPROM-trimmed calibration, and integrated fault detection make it suitable for airbag safing, rollover detection, and other safety-critical vehicle systems.
What external components are required for stable operation of the MMA2244KEGR2?
The MMA2244KEGR2 requires only two external components for robust operation: a 0.1 µF ceramic capacitor between VDD and VSS (placed adjacent to the device), and a 1 kΩ resistor + 0.01 µF capacitor RC filter on VOUT to suppress 70 kHz clock noise from the internal switched-capacitor filter. All other functions-including filtering, temperature compensation, and self-test-are fully integrated; no external trim resistors, op-amps, or references are needed.
MMA2244KEGR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- X
- Acceleration Range:
- ±22.5g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 100
- Bandwidth:
- 400Hz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MMA2244KEGR2 FAQ
1.How can I place an order for MMA2244KEGR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA2244KEGR2 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 MMA2244KEGR2 reliable?
The price and inventory of MMA2244KEGR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA2244KEGR2 is usually 5 days.
3.What payment methods are accepted for MMA2244KEGR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA2244KEGR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA2244KEGR2?
MMA2244KEGR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA2244KEGR2 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 MMA2244KEGR2?
For technical support, including MMA2244KEGR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA2244KEGR2 requirements.
6.How does Aetrix verify that MMA2244KEGR2 is sourced from the original manufacturer or authorized distributors?
All MMA2244KEGR2 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 MMA2244KEGR2 meets industry standards.
7.What is the process for return or replacement of MMA2244KEGR2?
All MMA2244KEGR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA2244KEGR2, 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 MMA2244KEGR2 part is unused and in its original packaging.
Return procedure for MMA2244KEGR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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