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NXP Semiconductors MMA2301KEG
- Part No.:
- MMA2301KEG
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MMA2301KEG.pdf
- Description:
- ACCELEROMETER 225G ANALOG 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,691
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Product details
Overview
MMA2301KEG from Freescale Semiconductor is a surface-mount, silicon capacitive micromachined accelerometer with integrated signal conditioning, 4th-order Bessel low-pass filter, and factory-calibrated ±200g full-scale range on the X-axis. It delivers ratiometric linear analog output (10.0 mV/g/V typical sensitivity), operates from 4.75–5.25 V, draws 3.0–6.0 mA, and is qualified to AEC-Q100 Grade 2 (−40°C to +105°C) for automotive vibration monitoring.
For engineers reviewing the MMA2301KEG datasheet, MMA2301KEG pinout, MMA2301KEG application, or MMA2301KEG equivalent, this page provides verified technical context, SOIC-16 pin mapping, self-test and fault-detection behavior, calibrated output characteristics, and direct alternatives for impact-sensing and structural health monitoring designs.
Technical Context
The MMA2301KEG integrates a wafer-level hermetically sealed polysilicon g-cell transducer with a CMOS ASIC that implements switched-capacitor sensing, temperature compensation, and a 4-pole Bessel filter (f−3dB = 400 Hz typ). Its output is ratiometric to VDD, with zero-g offset trimmed at 2.5 V (±0.1 V) and full-scale linearity error ≤1.0% FSO.
Self-test is initiated via logic-high pulse on ST pin, producing a calibrated 24g output shift; STATUS pin latches high on EPROM parity failure, clock monitor fault (fCLK < 50 kHz or > 260 kHz), or low-voltage detection (VLVD = 3.25 V typ). All functions operate without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±200g - defines maximum measurable acceleration before saturation; supports high-shock impact detection. |
| Sensitivity | 10.0 mV/g/V - output scales linearly with both acceleration and supply voltage; enables ratiometric measurement against VDD reference. |
| Bandwidth | 400 Hz - −3 dB point of integrated 4th-order Bessel filter; preserves pulse shape integrity for transient event capture. |
| Zero-g Offset | 2.5 V ±0.1 V at TA = 25°C, VDD = 5.0 V - factory-trimmed mid-supply baseline; eliminates need for external DC bias adjustment. |
| Supply Current | 3.0–6.0 mA - active-mode current draw across operating temperature; compatible with low-power automotive microcontroller interfaces. |
| Operating Temp | −40°C to +105°C - AEC-Q100 Grade 2 qualification ensures reliability in under-hood and chassis-mounted applications. |
| ESD Rating | 2 kV HBM - internal protection requires external handling precautions but avoids need for discrete TVS diodes. |
Pinout & Package
Package: 16-lead SOIC (Case 475-01), Pb-free (KEG suffix), surface-mount footprint per Figure 6 (9.65 mm × 3.91 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 9–16 | No Connect (N/C) | Internally unconnected; must be left floating per datasheet - no tie-to-ground or pull-up required. |
| 4 | ST (Self-Test Input) | CMOS logic input; rising edge initiates electrostatic self-test; requires ≥100 µs pulse width to reset STATUS latch. |
| 5 | VOUT (Analog Output) | Ratiometric voltage output (0.46–0.54 × VDD at zero-g); drives 200 µA load; RC filter (1 kΩ + 0.01 µF) recommended to suppress clock noise. |
| 6 | STATUS (Fault Output) | Open-drain logic output; latches high on EPROM parity error, clock monitor failure, or LVD; reset via ST pulse unless fault persists. |
| 7 | VSS | Analog ground reference; must be connected directly to system ground plane with low-inductance path. |
| 8 | VDD | Power supply input (4.75–5.25 V); requires 0.1 µF ceramic decoupling capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wafer-level hermetic seal | Eliminates package-level moisture ingress and long-term drift; enables >10-year operational stability in harsh environments. |
| Calibrated self-test | Verifies mechanical (g-cell deflection) and electrical (ASIC signal chain) integrity with 24g-equivalent output shift - critical for safety-critical airbag systems. |
| Onboard 4-pole Bessel filter | Provides linear phase response up to 400 Hz; prevents distortion of impact waveforms during vibration analysis or crash pulse capture. |
| Ratiometric output | Output voltage scales with VDD; removes dependency on absolute voltage reference - simplifies interface with microcontroller ADC using same VDD rail. |
| AEC-Q100 Grade 2 qualification | Validated for automotive under-hood operation (−40°C to +105°C); includes shock survivability to 1500g powered / 2000g unpowered. |
Applications
| Automotive Airbag Deployment Sensing | Industrial Machinery Vibration Monitoring |
|---|---|
|
Use Scenario: Real-time detection of rapid deceleration events during vehicle collision to trigger airbag inflation within 20 ms. IC Role / Device Role / Timing Role: Primary X-axis acceleration transducer providing analog voltage output proportional to crash pulse magnitude and timing profile. Use Value: Factory-calibrated ±200g range and 400 Hz Bessel-filtered bandwidth ensure accurate capture of 10–100 ms crash pulses without phase distortion or aliasing. |
Use Scenario: Continuous measurement of bearing housing vibration on rotating equipment (e.g., motors, gearboxes) to detect early-stage faults. IC Role / Device Role / Timing Role: Analog acceleration sensor feeding signal-conditioned output to data logger or predictive maintenance MCU. Use Value: Ratiometric output and −40°C to +105°C operation enable stable long-term deployment in uncontrolled industrial enclosures without recalibration. |
| Portable Impact Data Logger | Structural Health Monitoring Node |
|
Use Scenario: Battery-powered field device recording drop impacts on logistics packages or construction equipment during transport. IC Role / Device Role / Timing Role: Shock event detector with self-test capability to verify functionality before and after each deployment cycle. Use Value: Integrated self-test and STATUS fault latch allow autonomous verification of sensor integrity without host intervention - reducing field maintenance. |
Use Scenario: Embedded node measuring low-frequency building sway or bridge oscillation under wind or seismic loading. IC Role / Device Role / Timing Role: High-reliability analog accelerometer providing DC-coupled acceleration data for FFT-based spectral analysis. Use Value: Wafer-level hermetic seal and AEC-Q100 qualification ensure 15+ year operational life in outdoor, weather-exposed installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-axis analog accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL103CRZ | Single-axis, ±1.7g range, 1700 Hz bandwidth, 0.25 mg/√Hz noise floor; SOIC-8 package; no integrated self-test or STATUS pin. | Optimized for low-noise tilt sensing and low-g motion detection - unsuitable for high-g impact or crash pulse capture. | Select ADXL103CRZ only when sub-2g resolution and ultra-low noise are required; MMA2301KEG remains preferred for ≥100g events. |
| MMA2262KEG | Same SOIC-16 package and pinout; ±6g full-scale range; identical self-test, STATUS, and filtering architecture; lower sensitivity (1000 mV/g/V). | Designed for precision low-g applications (e.g., inclinometers); lacks the dynamic range needed for impact or crash sensing. | MMA2262KEG is a functional variant within the same family - use only when ±6g range suffices; MMA2301KEG is mandatory for ±200g requirements. |
Compared with ADXL103CRZ and MMA2262KEG, the MMA2301KEG uniquely combines ±200g range, integrated self-test with STATUS feedback, and AEC-Q100 Grade 2 qualification - making it the sole choice for automotive crash sensing and high-shock industrial logging where functional safety verification is required.
Availability
MMA2301KEG is available at Aetrix Electronics and suitable for automotive airbag control units, industrial vibration analyzers, portable impact loggers, and structural health monitoring nodes requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MMA2301KEG 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 fabless semiconductor company specializing in embedded processing, sensors, and automotive ICs, with leadership in MEMS accelerometer technology since the early 2000s.
The MMA series was designed specifically for automotive safety and industrial condition monitoring, integrating wafer-level packaging, factory calibration, and diagnostic features like self-test and fault latching into monolithic SOIC devices.
FAQ
What is the full-scale acceleration range of the MMA2301KEG?
The MMA2301KEG has a full-scale acceleration range of ±200g on its X-axis. This specification is factory-set and does not require external configuration. The device maintains linearity within ±1.0% FSO across this range and supports reliable detection of high-shock events such as crashes or drops. Its 1500g powered and 2000g unpowered survival ratings further confirm mechanical robustness beyond the measurement range.
Does the MMA2301KEG require external components for basic operation?
No, the MMA2301KEG operates autonomously with no external passive components required for core functionality. Its 4-pole Bessel filter, temperature compensation, and zero-g offset are fully integrated. However, a 0.1 µF ceramic capacitor on VDD and an RC filter (1 kΩ + 0.01 µF) on VOUT are strongly recommended to suppress power supply noise and switched-capacitor clock noise, respectively - both specified in the official Freescale layout guidelines.
How does the self-test function work on the MMA2301KEG?
The MMA2301KEG self-test applies an electrostatic force to the moveable g-cell plate via the ST pin, producing a calibrated 24g-equivalent output shift at VOUT. When ST is driven high, the internal ASIC measures the resulting deflection and outputs a corresponding voltage change. This verifies both mechanical integrity (g-cell) and electronic signal chain (ASIC, filter, output stage) - a requirement for ISO 26262-compliant automotive systems.
What fault conditions cause the STATUS pin on the MMA2301KEG to assert?
The STATUS pin on the MMA2301KEG asserts high (latched) upon detection of three independent fault conditions: EPROM parity becoming odd, clock frequency falling outside 50–260 kHz range, or supply voltage dropping below the low-voltage detect threshold (typ. 3.25 V). The latch resets only after a valid ST pulse - unless the underlying fault persists - enabling persistent fault reporting in safety-critical applications.
Is the MMA2301KEG pin-compatible with other devices in the MMA230x family?
Yes, the MMA2301KEG shares identical SOIC-16 pinout (Case 475-01), terminal assignments, and electrical interface with all members of the MMA230x series including MMA2301EGR2 and MMA2262KEG. This allows direct substitution within the same footprint when range, sensitivity, or qualification level aligns with system requirements - though full functional equivalence requires verification of specific performance parameters per application.
MMA2301KEG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- X
- Acceleration Range:
- ±225g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 10
- Bandwidth:
- 400Hz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MMA2301KEG FAQ
1.How can I place an order for MMA2301KEG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA2301KEG 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 MMA2301KEG reliable?
The price and inventory of MMA2301KEG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA2301KEG is usually 5 days.
3.What payment methods are accepted for MMA2301KEG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA2301KEG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA2301KEG?
MMA2301KEG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA2301KEG 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 MMA2301KEG?
For technical support, including MMA2301KEG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA2301KEG requirements.
6.How does Aetrix verify that MMA2301KEG is sourced from the original manufacturer or authorized distributors?
All MMA2301KEG 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 MMA2301KEG meets industry standards.
7.What is the process for return or replacement of MMA2301KEG?
All MMA2301KEG units undergo pre-shipment inspection (PSI). If there is an issue with MMA2301KEG, 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 MMA2301KEG part is unused and in its original packaging.
Return procedure for MMA2301KEG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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