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NXP Semiconductors MMA3202KEG
- Part No.:
- MMA3202KEG
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MMA3202KEG.pdf
- Description:
- ACCEL 112.5G/56.3G ANALOG 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,112
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Product details
Overview
MMA3202KEG from Freescale Semiconductor is a dual-axis (X/Y) surface-micromachined capacitive accelerometer with factory-calibrated ±100g X-axis and ±50g Y-axis full-scale range, integrated 4th-order Bessel low-pass filter (360–440 Hz), ratiometric linear output, and self-test functionality. It operates from 4.75–5.25 V over –40°C to +125°C and is qualified to AEC-Q100 Grade 2 for automotive-grade reliability.
For engineers reviewing the MMA3202KEG datasheet, MMA3202KEG pinout, MMA3202KEG application, or MMA3202KEG equivalent, this page delivers verified specifications, SOIC-20 pin mapping, real-world use cases in impact monitoring and hard drive protection, and two validated alternative accelerometers with documented functional and packaging differences.
Technical Context
The MMA3202KEG integrates a micromachined polysilicon g-cell transducer with a CMOS ASIC featuring switched-capacitor signal conditioning, on-chip clock generation, EPROM-based trim, and fault detection logic. Its dual-output architecture provides independent analog voltage outputs (XOUT, YOUT) referenced to AVDD, each with 19–21 mV/g sensitivity (X) and 38–42 mV/g (Y) at VDD = 5.0 V.
Self-test activation applies electrostatic force to deflect the center plate, producing a calibrated ΔVOFF of 9.6–14.4 g-equivalent output shift. Fault detection includes low-voltage detect (VLVD = 2.7–4.0 V), clock monitor (fmin = 50–260 kHz), and EPROM parity check - all latched to the STATUS pin and resettable via ST pulse ≥100 µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| X-axis range | ±100 g - supports high-shock vibration monitoring without saturation |
| Y-axis range | ±50 g - optimized for lower-range orthogonal motion sensing |
| Bandwidth | 360–440 Hz - preserves pulse shape integrity for impact event capture |
| Sensitivity (X) | 19–21 mV/g - enables direct interface to 10-bit ADC with ~50 mg LSB resolution |
| Sensitivity (Y) | 38–42 mV/g - higher gain for improved Y-axis SNR in low-acceleration applications |
| Supply current | 6–10 mA - compatible with 5 V microcontroller power rails without external regulation |
| Operating temp | –40°C to +125°C - meets AEC-Q100 Grade 2 for under-hood automotive use |
Pinout & Package
Package: 20-lead SOIC (Case 475A-02), Pb-free, surface-mountable with standard reflow profile. Pin 1 index corner marked; N/C pins (1–4, 12–16, 17–19) must remain floating per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 5 ST | Digital input | Active-high self-test trigger; initiates mechanical deflection and fault latch reset on rising edge ≥100 µs |
| 6 XOUT | Analog output | X-axis acceleration voltage (0.46–0.54 × VDD at 0g); requires RC filter (1 kΩ + 0.01 µF) to suppress clock noise |
| 7 STATUS | Digital output | Open-drain fault indicator; latches high on LVD, clock failure, or EPROM parity error; reset by ST pulse |
| 8 VSS | Ground | Digital ground reference; separate from AVDD/GND to minimize digital noise coupling |
| 9 VDD | Power supply | 5 V nominal digital supply (4.75–5.25 V); powers logic, clock, and control circuits |
| 10 AVDD | Analog supply | Dedicated analog rail; decoupled with 0.1 µF capacitor to ensure stable sensor biasing |
| 11 YOUT | Analog output | Y-axis acceleration voltage (ratiometric to AVDD); same filtering requirements as XOUT |
| 20 GND | Ground | Analog ground return; tied to PCB ground plane beneath device to reduce noise |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic wafer-level seal | Eliminates package-level moisture ingress, enabling >10-year reliability in humid environments |
| 4th-order Bessel filter | Provides linear phase response to avoid distortion of transient shock waveforms during impact analysis |
| Calibrated self-test | Verifies full signal chain integrity (mechanical g-cell + ASIC + output stage) without external test equipment |
| Ratiometric output | Output scaling tracks AVDD variations, removing need for precision voltage references in cost-sensitive systems |
| AEC-Q100 Grade 2 qualification | Validated for automotive applications requiring operation up to +125°C ambient with robust ESD tolerance |
Applications
| Vibration Monitoring and Recording | Computer Hard Drive Protection |
|---|---|
Use Scenario: Continuous measurement of machine frame vibration in industrial pumps and motors to detect bearing wear or imbalance. IC Role / Device Role / Timing Role: Dual-axis analog sensor providing real-time acceleration data to an MCU for FFT-based spectral analysis. Use Value: ±100g/±50g range captures both low-frequency resonance and high-frequency impact events; 360–440 Hz bandwidth avoids aliasing in rotating machinery diagnostics. | Use Scenario: Detecting free-fall or sudden impact to park read/write heads before physical contact with platters. IC Role / Device Role / Timing Role: Shock-triggered safety controller interfaced to disk drive actuator logic via analog comparators or ADC thresholds. Use Value: Self-test capability validates sensor readiness at boot; ratiometric output ensures consistent trip-point accuracy across varying 5 V rail tolerances. |
| Appliance Control | Impact Monitoring |
Use Scenario: Measuring drum rotation dynamics and unbalance in front-loading washing machines to adjust spin speed and prevent vibration-induced movement. IC Role / Device Role / Timing Role: Low-latency analog feedback element feeding into motor control loop for adaptive spin balancing. Use Value: Factory-trimmed zero-g offset and temperature compensation eliminate need for runtime calibration in consumer appliance firmware. | Use Scenario: Logging peak acceleration during drop testing of portable electronics or packaging validation. IC Role / Device Role / Timing Role: High-sensitivity analog front-end capturing transient shock pulses for post-event analysis. Use Value: 2000 g unpowered survivability rating ensures device integrity after 1.2 m concrete drop tests; STATUS pin flags any internal fault post-impact. |
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 |
|---|---|---|---|
| MMA3201KEG | Single-axis (X-only), ±100g range, identical SOIC-20 package and pinout except YOUT unused | Lacks Y-axis sensing; suitable only where orthogonal axis data is unnecessary | Select when system requires only one axis and board space/layout reuse is critical |
| ADXL322ARZ | ±5 g range per axis, 500 Hz bandwidth, 3.3 V supply, different SOIC-16 footprint and pin assignment | Higher sensitivity but narrower dynamic range; not AEC-Q100 qualified | Prefer for low-g precision motion sensing in non-automotive industrial or medical devices |
Compared with MMA3202KEG, MMA3201KEG reduces channel count while maintaining pin compatibility and automotive qualification, whereas ADXL322ARZ trades range and qualification for higher resolution at lower g levels and a smaller package - neither is pin-compatible, requiring layout changes and firmware adaptation.
Availability
MMA3202KEG is available at Aetrix Electronics and suitable for vibration monitoring, computer hard drive protection, and appliance control requiring stable component supply across automotive, industrial, and consumer electronics production cycles.
Supply support for MMA3202KEG 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, analog, and sensor solutions for automotive, industrial, and IoT markets.
The MMA3202KEG belongs to Freescale's Xtrinsic™ family of intelligent sensors, designed specifically for high-reliability motion sensing in harsh environments where self-test, temperature stability, and AEC-Q100 compliance are mandatory.
FAQ
What is the operating voltage range for the MMA3202KEG?
The MMA3202KEG operates from 4.75 V to 5.25 V on both VDD (digital supply) and AVDD (analog supply). Operation outside this range may yield linear output but invalidates factory calibration. The device includes a low-voltage detect circuit with trip points between 2.7 V and 4.0 V, and the STATUS pin asserts high if VDD falls below the threshold, signaling potential measurement inaccuracy in the MMA3202KEG.
How does the self-test function work in the MMA3202KEG?
The MMA3202KEG self-test applies electrostatic force to the movable g-cell plate via the ST pin, causing calibrated mechanical deflection equivalent to 9.6–14.4 g. This produces measurable output shifts on XOUT and YOUT, verifying integrity of both transducer and signal chain. A rising edge on ST ≥100 µs also resets the STATUS latch unless a fault condition persists - confirming full-system functionality without external stimuli in the MMA3202KEG.
Is the MMA3202KEG pin-compatible with other devices in the MMA320x series?
Yes - the MMA3202KEG shares identical SOIC-20 (Case 475A-02) packaging and pinout with MMA3202EG, MMA3202EGR2, and MMA3201KEG. Pin functions (ST, XOUT, STATUS, VDD, AVDD, YOUT, GND, VSS) match exactly. However, MMA3201KEG leaves YOUT unconnected internally, so firmware and schematic must account for missing Y-axis data when substituting in the MMA3202KEG design.
What is the purpose of separate VDD and AVDD supplies in the MMA3202KEG?
VDD powers digital logic, clock generator, and control circuitry, while AVDD supplies the analog front-end including the g-cell bias and output amplifiers. Separating these rails minimizes digital switching noise coupling into sensitive analog signals. The MMA3202KEG datasheet mandates individual 0.1 µF decoupling capacitors on both VDD and AVDD, routed directly to ground, to maintain signal fidelity - especially critical for accurate low-noise acceleration measurement in the MMA3202KEG.
Does the MMA3202KEG require external components for basic operation?
No external components are required for core functionality, but best-practice implementation of the MMA3202KEG includes: a 0.1 µF ceramic capacitor on VDD and AVDD for decoupling; 1 kΩ + 0.01 µF RC filters on XOUT and YOUT to suppress switched-capacitor clock noise (~70 kHz); and grounding of all N/C pins per datasheet guidance. These ensure specified noise performance, stability, and fault detection reliability in the MMA3202KEG.
MMA3202KEG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA3202
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- X, Y
- Acceleration Range:
- ±112.5g (X), ±56.3g (Y)
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 20 (X), 40 (Y)
- 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:
- 20-SOIC
MMA3202KEG FAQ
1.How can I place an order for MMA3202KEG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA3202KEG 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 MMA3202KEG reliable?
The price and inventory of MMA3202KEG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA3202KEG is usually 5 days.
3.What payment methods are accepted for MMA3202KEG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA3202KEG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA3202KEG?
MMA3202KEG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA3202KEG 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 MMA3202KEG?
For technical support, including MMA3202KEG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA3202KEG requirements.
6.How does Aetrix verify that MMA3202KEG is sourced from the original manufacturer or authorized distributors?
All MMA3202KEG 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 MMA3202KEG meets industry standards.
7.What is the process for return or replacement of MMA3202KEG?
All MMA3202KEG units undergo pre-shipment inspection (PSI). If there is an issue with MMA3202KEG, 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 MMA3202KEG part is unused and in its original packaging.
Return procedure for MMA3202KEG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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