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NXP Semiconductors MMA1211EG
- Part No.:
- MMA1211EG
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MMA1211EG.pdf
- Description:
- ACCELEROMETER 169G ANALOG 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,771
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Product details
Overview
MMA1211EG from Freescale Semiconductor is a surface-mount, silicon capacitive, micromachined Z-axis accelerometer with integrated signal conditioning, factory-calibrated ±150g full-scale range, 4th-order Bessel low-pass filter (f–3dB = 360–440 Hz), and ratiometric linear output. It operates from 4.75–5.25 V, draws 3.0–6.0 mA, and is rated for –40°C to +125°C in automotive vibration monitoring systems.
For engineers reviewing the MMA1211EG datasheet, MMA1211EG pinout, MMA1211EG application, or MMA1211EG equivalent, this page delivers verified technical context, SOIC-16 pin mapping, self-test and fault-detection behavior, noise performance (110 mVrms, 0.1–1 kHz), and drop-in Pb-free alternatives for industrial shock sensing and impact recording designs.
Technical Context
The MMA1211EG implements a monolithic CMOS ASIC with switched-capacitor front-end interfacing to a wafer-level hermetically sealed poly-silicon g-cell. Its 4-pole Bessel filter preserves pulse shape integrity without external components, and its ratiometric output scales linearly with VDD to cancel supply-induced ADC errors.
Self-test applies electrostatic force to deflect the movable plate, producing a calibrated 55–95 g output response; status pin latches high on LVD (<2.7–4.0 V), clock monitor failure (50–260 kHz), or EPROM parity error, and resets only via ST pin pulse if faults clear.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±150 g - defines maximum measurable acceleration before saturation; supports high-shock impact detection |
| Bandwidth (–3 dB) | 360–440 Hz - sets usable frequency limit for vibration monitoring without phase distortion |
| Output Sensitivity | 12.66–14.00 mV/g - determines resolution per g; varies linearly with VDD due to ratiometric design |
| Supply Voltage | 4.75–5.25 V - narrow window ensures calibration validity; operation outside invalidates factory trim |
| Supply Current | 3.0–6.0 mA - enables low-power embedded deployment; current increases with temperature and VDD |
| Output Noise (RMS) | 110 mVrms (0.1–1 kHz) - limits smallest detectable acceleration change in dynamic sensing |
| Transverse Sensitivity | ≤10% FSO - quantifies cross-axis rejection; critical for accurate single-axis Z-direction measurement |
Pinout & Package
Package: 16-lead SOIC (Case 475-01), Pb-free, RoHS-compliant, surface-mount footprint per Figure 7 (9.65 mm × 6.10 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 9–16 | No Connect (N/C) | Internally unconnected; must remain floating per datasheet; no PCB routing required |
| 4 ST | Self-Test Input | Active-high logic input; initiates mechanical+electrical verification; internal pull-down prevents false triggering |
| 5 VOUT | Analog Output | Ratiometric voltage output (VDD/2 ± sensitivity × g); requires RC filter (1 kΩ + 0.01 µF) to suppress clock noise |
| 6 STATUS | Fault Status Output | Open-drain logic output; latched high on LVD, clock fail, or EPROM parity error; reset by ST pulse |
| 7 VSS | Ground Reference | Primary power return; requires dedicated ground plane beneath device to minimize noise coupling |
| 8 VDD | Power Supply Input | 4.75–5.25 V supply; requires 0.1 µF decoupling capacitor placed adjacent to pin per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Wafer-Level Seal | Eliminates package-level moisture ingress and long-term drift; enables >1500 g powered shock survivability |
| Calibrated Self-Test | Verifies g-cell deflection and ASIC signal path integrity with 55–95 g output; no external test equipment needed |
| On-Chip 4-Pole Bessel Filter | Provides linear-phase response to preserve transient pulse fidelity; eliminates need for external RC networks |
| Ratiometric Output | Offset and sensitivity scale with VDD; cancels supply ripple effects when digitized by same-rail ADC |
| Integrated Fault Monitoring | Detects low VDD, clock oscillator failure, and EPROM corruption; provides latchable STATUS flag for system diagnostics |
Applications
| Automotive Airbag Deployment Systems | Industrial Vibration Monitoring |
|---|---|
|
Use Scenario: Real-time crash detection during frontal collision events to trigger airbag inflation within <10 ms. IC Role / Device Role / Timing Role: Z-axis acceleration transducer providing analog voltage proportional to deceleration magnitude and direction. Use Value: Factory-trimmed ±150g range and 360–440 Hz bandwidth capture rapid crash pulses while rejecting engine harmonics; self-test validates readiness at power-up. |
Use Scenario: Continuous monitoring of rotating machinery (e.g., motors, gearboxes) for early bearing wear detection. IC Role / Device Role / Timing Role: High-reliability analog sensor feeding data to predictive maintenance microcontroller or FFT analyzer. Use Value: 110 mVrms noise floor and ≤10% transverse sensitivity enable precise amplitude tracking of 50–400 Hz vibration signatures amid mechanical noise. |
| Portable Impact Recorders | Heavy Equipment Shock Logging |
|
Use Scenario: Field-deployed devices capturing drop-test or transport shock events on electronics packaging or medical devices. IC Role / Device Role / Timing Role: Standalone analog output node interfaced directly to low-cost SAR ADC with minimal external components. Use Value: Ratiometric output eliminates need for precision voltage reference; STATUS pin flags power brownouts during data logging sessions. |
Use Scenario: Mounting on construction vehicles or mining equipment to log operational shock exposure over service life. IC Role / Device Role / Timing Role: Robust inertial sensor surviving 2000 g unpowered shocks and operating continuously at 125°C ambient. Use Value: Wafer-level hermetic seal and –40°C to +125°C rating ensure functionality in harsh under-hood or outdoor environments without conformal coating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMA1211D | Same die, SnPb finish; identical electrical specs, timing, and pinout; differs only in RoHS compliance and solder alloy | Legacy automotive production requiring Pb-containing solder reflow profiles | Select MMA1211D only if Pb-based assembly process is mandated and RoHS exemption applies |
| ADXL206 | Single-axis ±5 g, 2.5 V supply, 100 Hz bandwidth; lower sensitivity, narrower range, no STATUS fault pin or self-test latch | Low-g precision tilt sensing where high-shock survivability and diagnostics are not required | Choose ADXL206 only for battery-powered static-tilt applications; not suitable for MMA1211EG's ±150g/impact use cases |
Compared with MMA1211D, the MMA1211EG offers identical performance with Pb-free termination for modern RoHS-compliant assembly; compared with ADXL206, it delivers 30× higher full-scale range, integrated fault reporting, and calibrated self-test-making it unsuitable as a drop-in replacement but essential for high-shock automotive and industrial logging.
Availability
MMA1211EG is available at Aetrix Electronics and suitable for automotive crash sensing, industrial vibration monitoring, portable impact recording, and heavy-equipment shock logging requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MMA1211EG 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 embedded processors and sensors, specializing in automotive, industrial, and networking solutions before its 2015 acquisition.
The MMA1211EG belongs to Freescale's legacy micromachined accelerometer family, engineered specifically for high-reliability automotive safety systems and industrial condition monitoring where self-test, fault reporting, and wide-temperature operation are mandatory.
FAQ
What is the full-scale acceleration range of the MMA1211EG?
The MMA1211EG has a factory-set full-scale range of ±150 g, meaning it outputs a ratiometric voltage spanning VDD/2 ± (sensitivity × 150) across its linear operating region. This range is optimized for high-shock applications like crash detection and impact logging, and remains valid across its –40°C to +125°C operating temperature range.
Does the MMA1211EG require external components for basic operation?
Yes-the MMA1211EG requires a 0.1 µF ceramic capacitor between VDD and VSS for power supply decoupling, and an RC filter (1 kΩ + 0.01 µF) on VOUT to suppress switched-capacitor clock noise. No external resistors or capacitors are needed for filter cutoff or calibration, as those functions are fully integrated and factory-trimmed.
How does the self-test function work on the MMA1211EG?
The MMA1211EG self-test applies a calibrated electrostatic force to the movable g-cell plate via pin ST, causing mechanical deflection equivalent to 55–95 g of acceleration. The resulting output voltage shift on VOUT verifies both mechanical integrity and signal chain functionality. STATUS pin reflects self-test activation and latches fault conditions independently.
What does the STATUS pin indicate on the MMA1211EG?
The STATUS pin on the MMA1211EG is an open-drain output that goes high to signal three fault conditions: supply voltage falling below the LVD threshold (2.7–4.0 V), internal clock frequency dropping outside 50–260 kHz, or EPROM parity becoming odd. It latches high until cleared by a >100 µs ST pulse-if the underlying fault persists, STATUS remains asserted.
Is the MMA1211EG pin-compatible with other variants in the MMA1211 family?
Yes-the MMA1211EG shares identical SOIC-16 pinout, electrical characteristics, and functional block diagram with MMA1211D, MMA1211DR2, and MMA1211EGR2. The only differences are Pb-free termination (EG suffix) versus SnPb (D suffix) and tape-and-reel packaging (R2 suffix); all variants use Case 475-01 and require identical PCB layout and interface circuitry.
MMA1211EG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- Z
- Acceleration Range:
- ±169g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 13.33
- 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
MMA1211EG FAQ
1.How can I place an order for MMA1211EG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA1211EG 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 MMA1211EG reliable?
The price and inventory of MMA1211EG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA1211EG is usually 5 days.
3.What payment methods are accepted for MMA1211EG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA1211EG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA1211EG?
MMA1211EG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA1211EG 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 MMA1211EG?
For technical support, including MMA1211EG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA1211EG requirements.
6.How does Aetrix verify that MMA1211EG is sourced from the original manufacturer or authorized distributors?
All MMA1211EG 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 MMA1211EG meets industry standards.
7.What is the process for return or replacement of MMA1211EG?
All MMA1211EG units undergo pre-shipment inspection (PSI). If there is an issue with MMA1211EG, 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 MMA1211EG part is unused and in its original packaging.
Return procedure for MMA1211EG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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