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NXP Semiconductors MMA3201KEGR2
- Part No.:
- MMA3201KEGR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MMA3201KEGR2.pdf
- Description:
- MICROMACHINED ACCELEROMETER, DUA
- Quantity:
- Payment:
- Shipping:
Inventory:33,225
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Product details
Overview
MMA3201KEGR2 from Freescale Semiconductor is a dual-axis (X/Y) surface-micromachined capacitive accelerometer with integrated signal conditioning, 4th-order Bessel low-pass filtering, and factory-calibrated ±40g full-scale range. It delivers ratiometric linear analog outputs, operates from 4.75–5.25 V, draws 6–10 mA, and is qualified to AEC-Q100 Grade 2 (–40°C to +105°C) for automotive and industrial vibration monitoring.
For engineers reviewing the MMA3201KEGR2 datasheet, MMA3201KEGR2 pinout, MMA3201KEGR2 application, or MMA3201KEGR2 equivalent, this page provides verified technical context, SOIC-20 pin mapping, self-test and fault-detection behavior, noise performance (110 mVrms, 0.01–1 kHz), and calibrated alternatives for impact sensing, hard drive protection, and motion-controlled input devices.
Technical Context
The MMA3201KEGR2 integrates a polysilicon g-cell transducer hermetically sealed at wafer level with a CMOS ASIC performing switched-capacitor sensing, temperature compensation, and 4-pole Bessel filtering (f–3dB = 360–440 Hz). Its dual analog outputs (XOUT/YOUT) are ratiometric to VDD, with zero-g offset centered at VDD/2 and sensitivity of 47.5–52.5 mV/g per axis.
Self-test is initiated via ST pin, applying electrostatic force to deflect the center plate and produce a calibrated output shift (~10–14.4 g-equivalent); STATUS pin latches high on LVD trip (VLVD = 2.7–4.0 V), clock monitor failure (fmin = 50–260 kHz), or EPROM parity error, and resets only upon ST pulse if faults clear.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±40g per axis - supports high-shock detection in drop testing and impact monitoring without saturation. |
| Supply Voltage | 4.75–5.25 V - ensures stable calibration and ratiometric output; operation outside this range invalidates calibration. |
| Bandwidth | 360–440 Hz - preserves pulse shape integrity for vibration analysis using maximally flat group delay. |
| Output Noise | 110 mVrms (0.01–1 kHz) - defines minimum detectable acceleration resolution in low-frequency mechanical sensing. |
| Self-Test Response | 10–14.4 g-equivalent output shift - verifies mechanical integrity and signal chain functionality pre-deployment. |
| Operating Temp | –40°C to +105°C - meets AEC-Q100 Grade 2 for under-hood automotive and industrial embedded use. |
| Power Supply Current | 6–10 mA - enables low-power system design with predictable thermal budget in continuous-sensing mode. |
Pinout & Package
Package: 20-lead SOIC (Case 475A-02), surface-mount, Pb-free (KEG suffix), 0.61 mm lead pitch, 9.65 mm × 6.0 mm body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 12–20 (N/C) | No internal connection | Must be left floating; no PCB trace or pull-up/down required. |
| 5 ST | Self-test logic input | Active-high trigger; initiates calibrated mechanical deflection and output verification sequence. |
| 6 XOUT | Analog output (X-axis) | Ratiometric voltage (VDD/2 ± sensitivity × g); requires RC filter (1 kΩ + 0.01 µF) to suppress clock noise. |
| 7 STATUS | Fault status output | Open-drain logic high on LVD, clock fail, or EPROM parity error; resets only via ST pulse if fault clears. |
| 8 VSS | Digital ground | Reference for digital logic (ST, STATUS); separate from analog ground path to minimize noise coupling. |
| 9 VDD | Digital supply input | Primary power for control logic and oscillator; decoupled with 0.1 µF capacitor per layout guidelines. |
| 10 AVDD | Analog supply input | Independent analog rail for sensor front-end; improves PSRR and reduces supply-induced offset drift. |
| 11 YOUT | Analog output (Y-axis) | Identical electrical behavior to XOUT; enables orthogonal motion vector measurement. |
| 20 GND | Analog ground | Reference for analog signal chain (XOUT/YOUT); must be connected to solid ground plane beneath device. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic wafer-level seal | Prevents moisture and particle ingress, ensuring long-term stability in harsh environments (e.g., engine compartments). |
| Factory-set 4-pole Bessel filter | Eliminates need for external RC components while preserving transient fidelity critical for impact waveform capture. |
| Calibrated self-test with status latch | Enables automated system-level diagnostics without external test equipment or firmware overhead. |
| Ratiometric analog outputs | Compensates for supply voltage drift in battery-powered systems, maintaining measurement accuracy across VDD variation. |
| AEC-Q100 Grade 2 qualification | Validates reliability for automotive applications including airbag readiness checks and chassis vibration monitoring. |
Applications
| Vibration Monitoring and Recording | Computer Hard Drive Protection |
|---|---|
Use Scenario: Continuous measurement of machine frame acceleration to detect bearing wear or imbalance in industrial motors. IC Role / Device Role / Timing Role: Dual-axis analog sensor providing real-time X/Y acceleration data to an MCU ADC for FFT-based spectral analysis. Use Value: ±40g range and 440 Hz bandwidth capture harmonics up to 7th order; 110 mVrms noise floor enables early fault detection before catastrophic failure. | Use Scenario: Sudden free-fall detection during laptop movement to park read/write heads before impact. IC Role / Device Role / Timing Role: Shock event detector triggering immediate head retraction via dedicated interrupt path (STATUS pin). Use Value: Self-test capability validates sensor health at boot; AEC-Q100 qualification ensures robustness against repeated drop shocks (1.2 m concrete drop test). |
| Appliance Control | Virtual Reality Input Devices |
Use Scenario: Detecting drum unbalance in washing machines to dynamically adjust spin speed and reduce vibration. IC Role / Device Role / Timing Role: Low-latency analog interface to microcontroller for closed-loop motor control based on real-time acceleration feedback. Use Value: Ratiometric outputs maintain accuracy across varying 5 V rail tolerances in cost-sensitive white goods; 6–10 mA current draw supports always-on monitoring. | Use Scenario: Capturing hand orientation and gesture velocity in VR controllers for immersive motion tracking. IC Role / Device Role / Timing Role: Dual-axis motion sensor feeding orientation algorithms; STATUS pin signals fault conditions that could corrupt pose estimation. Use Value: 360–440 Hz bandwidth supports fast hand movements; ±40g range accommodates aggressive gestures without clipping. |
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 |
|---|---|---|---|
| ADXL203CE | Single-supply 5 V operation; ±1.7 g full-scale; 0.5–500 Hz bandwidth; no self-test or STATUS pin. | Limited to low-g precision tilt sensing; unsuitable for impact or high-shock detection. | Select ADXL203CE only when sub-2g resolution is required and system-level diagnostics are handled externally. |
| MMA8452Q | I²C digital output; ±2/4/8 g selectable range; embedded FIFO and motion detection; 12-bit resolution. | Requires host MCU with I²C interface; eliminates analog filtering but adds firmware complexity for self-test emulation. | Choose MMA8452Q for space-constrained designs needing digital integration and advanced features, accepting trade-off in analog simplicity. |
Compared with MMA3201KEGR2, ADXL203CE offers higher resolution at low g but lacks self-test and shock tolerance, while MMA8452Q replaces analog outputs with digital intelligence-making MMA3201KEGR2 optimal for deterministic analog signal chains requiring guaranteed fault visibility and ±40g robustness.
Availability
MMA3201KEGR2 is available at Aetrix Electronics and suitable for vibration monitoring, hard drive protection, and appliance control requiring stable component supply across automotive, industrial, and consumer electronics programs.
Supply support for MMA3201KEGR2 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 connectivity solutions for automotive, industrial, and IoT markets.
The MMA3201 series was designed as a high-reliability analog-output accelerometer for safety-critical and high-shock applications where deterministic self-test, AEC-Q100 compliance, and ratiometric stability are mandatory.
FAQ
What is the operating supply voltage range for the MMA3201KEGR2?
The MMA3201KEGR2 operates within a supply voltage range of 4.75 V to 5.25 V. Operation outside this window invalidates factory calibration and may cause nonlinearity or output instability. The device draws 6–10 mA typical current and requires separate AVDD and VDD rails decoupled with 0.1 µF capacitors. The MMA3201KEGR2 datasheet specifies that ratiometric performance and sensitivity accuracy are guaranteed only within this 4.75–5.25 V band.
How does the self-test function work on the MMA3201KEGR2?
The MMA3201KEGR2 self-test applies an electrostatic force to the micromachined center plate via the ST pin, causing a calibrated mechanical deflection that produces a 10–14.4 g-equivalent output shift on both XOUT and YOUT. This verifies integrity of the g-cell and signal chain. The STATUS pin reflects self-test activation and latches fault conditions; it resets only after a valid ST pulse if no active fault remains. The MMA3201KEGR2's self-test is fully integrated and requires no external components.
What package type and footprint does the MMA3201KEGR2 use?
The MMA3201KEGR2 uses a 20-lead SOIC package (Case 475A-02), Pb-free (KEG suffix), with 0.61 mm lead pitch and 9.65 mm × 6.0 mm body dimensions. Its minimum recommended footprint matches standard SOIC-20 land patterns, including solder mask definition and coplanarity control. The MMA3201KEGR2 has 11 functional pins (ST, XOUT, STATUS, VSS, VDD, AVDD, YOUT, GND) and 9 no-connect (N/C) terminals that must remain floating per datasheet guidance.
Does the MMA3201KEGR2 include built-in fault detection?
Yes, the MMA3201KEGR2 includes three hardware fault monitors: low-voltage detection (trip threshold 2.7–4.0 V), clock frequency monitor (valid range 50–260 kHz), and EPROM parity checker. Any fault sets the open-drain STATUS pin high and latches it until cleared by a rising edge on ST-if the underlying fault persists, STATUS remains asserted. This diagnostic capability is integral to the MMA3201KEGR2's AEC-Q100 Grade 2 qualification for automotive safety systems.
What is the bandwidth and filter type used in the MMA3201KEGR2?
The MMA3201KEGR2 employs an onboard 4th-order switched-capacitor Bessel filter with a –3 dB cutoff frequency of 360–440 Hz. This filter preserves pulse shape integrity through maximally flat group delay, making it ideal for transient impact capture and vibration waveform analysis. Unlike Butterworth or Chebyshev filters, the Bessel response minimizes phase distortion-critical for accurate time-domain interpretation of acceleration events in the MMA3201KEGR2.
MMA3201KEGR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- X, Y
- Acceleration Range:
- ±45g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 50
- Bandwidth:
- 400Hz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
MMA3201KEGR2 FAQ
1.How can I place an order for MMA3201KEGR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA3201KEGR2 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 MMA3201KEGR2 reliable?
The price and inventory of MMA3201KEGR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA3201KEGR2 is usually 5 days.
3.What payment methods are accepted for MMA3201KEGR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA3201KEGR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA3201KEGR2?
MMA3201KEGR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA3201KEGR2 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 MMA3201KEGR2?
For technical support, including MMA3201KEGR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA3201KEGR2 requirements.
6.How does Aetrix verify that MMA3201KEGR2 is sourced from the original manufacturer or authorized distributors?
All MMA3201KEGR2 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 MMA3201KEGR2 meets industry standards.
7.What is the process for return or replacement of MMA3201KEGR2?
All MMA3201KEGR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA3201KEGR2, 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 MMA3201KEGR2 part is unused and in its original packaging.
Return procedure for MMA3201KEGR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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