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NXP Semiconductors MMA1220EG
- Part No.:
- MMA1220EG
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MMA1220EG.pdf
- Description:
- ACCELEROMETER 8G ANALOG 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,727
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Product details
Overview
MMA1220EG from Freescale Semiconductor is a silicon capacitive, micromachined z-axis accelerometer with ±8g full-scale range, factory-calibrated 4th-order Bessel low-pass filter (f−3dB = 250 Hz typ), ratiometric linear output (0.50 VDD mV/g), and integrated self-test functionality. It operates from 4.75–5.25 V at −40°C to +125°C and is used in hard drive protection, appliance control, and vibration monitoring systems.
For engineers reviewing the MMA1220EG datasheet, MMA1220EG pinout, MMA1220EG application, or MMA1220EG equivalent, key selection considerations include its SOIC-16 package, zero-g offset stability (±0.25 VDD), status fault latch behavior, and ESD-sensitive handling requirements per Freescale's 2 kV internal protection specification.
Technical Context
The MMA1220EG implements a surface-micromachined polysilicon g-cell transducer hermetically sealed at wafer level, paired with a CMOS ASIC that performs switched-capacitor sensing, temperature-compensated gain/offset trimming, and 4-pole Bessel filtering - all without external components. Its ratiometric architecture ensures output offset and sensitivity scale linearly with VDD.
Self-test is activated via logic-high ST pin, applying electrostatic force to deflect the center plate; resulting output shift (∆VST = 0.2 VDD min) verifies mechanical and electrical integrity. The STATUS pin latches high on Low Voltage Detect, clock monitor failure, or EPROM parity error, and resets only after ST pulse if faults are cleared.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±8g - defines maximum measurable acceleration before saturation; supports shock detection in HDD drop protection. |
| Bandwidth (−3 dB) | 250 Hz typical - preserves pulse shape integrity for vibration analysis up to industrial machinery frequencies. |
| Output Sensitivity | 0.50 VDD mV/g - ratiometric scaling enables direct interface with 5 V ADCs without supply-error compensation. |
| Zero-g Offset | 2.5 V at VDD = 5.0 V - midsupply quiescent output simplifies DC-coupled signal conditioning. |
| Supply Current | 5.0 mA typical - enables low-power operation in battery-backed appliance controllers. |
| Self-Test Response | ≥0.2 VDD output shift - provides deterministic verification of sensor+ASIC chain prior to system deployment. |
| Transverse Sensitivity | ≤10% FSO - ensures minimal cross-axis interference in single-axis z-oriented mounting. |
Pinout & Package
Package: 16-lead SOIC (Case 475-01), Pb-free, RoHS-compliant, 7.5 mm × 10.3 mm body, 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 9–16 | No Connect (N/C) | Unused die pads; must remain unconnected to avoid parasitic coupling or latch-up. |
| 4 | Self-Test Input (ST) | Active-high digital input; initiates calibrated electrostatic deflection; internal pull-down prevents false triggering. |
| 5 | Analog Output (VOUT) | Ratiometric voltage output proportional to z-axis acceleration; requires RC filter (1 kΩ + 0.01 µF) to suppress clock noise. |
| 6 | Status Output (STATUS) | Open-drain logic output latched high on LVD/clock/EPROM fault; reset by ST pulse ≥100 µs. |
| 7 | Ground (VSS) | Primary power return; pins 1–3 are redundant VSS - connect all to solid ground plane. |
| 8 | Supply (VDD) | 4.75–5.25 V analog/digital supply; requires 0.1 µF decoupling capacitor placed near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Wafer-Level Seal | Eliminates moisture-induced drift and long-term reliability degradation in automotive/appliance environments. |
| Factory-Calibrated Filter | 4-pole Bessel response (250 Hz) set at wafer test - no external R/C components needed for timing accuracy. |
| Integrated Self-Test | Electrostatic actuation verifies g-cell motion and signal path continuity without mechanical stimulus. |
| Ratiometric Output | Offset and sensitivity track VDD - cancels supply-induced errors when digitized by same-supply ADC. |
| Fault Detection Logic | LVD, clock monitor, and EPROM parity checking provide system-level diagnostic coverage for safety-critical use. |
Applications
| Hard Drive Drop Protection | Appliance Vibration Control |
|---|---|
Use Scenario: Detects free-fall events in laptop computers to park read/write heads before impact. IC Role / Device Role / Timing Role: Z-axis accelerometer providing real-time acceleration threshold detection with <10 ms response time. Use Value: Prevents head crash damage by enabling firmware-initiated park sequence within 20 ms of 0g detection. | Use Scenario: Monitors drum imbalance during washing machine spin cycles to dynamically adjust motor speed. IC Role / Device Role / Timing Role: Analog vibration sensor feeding into MCU ADC for FFT-based amplitude analysis. Use Value: Reduces mechanical stress and acoustic noise by limiting spin RPM when vibration exceeds 0.5g RMS. |
| Computer Input Devices | Industrial Bearing Monitoring |
Use Scenario: Enables tilt and motion sensing in gaming joysticks and VR controllers. IC Role / Device Role / Timing Role: Low-latency z-axis motion transducer interfaced directly to microcontroller ADC. Use Value: Delivers sub-10 mg resolution and <150 Hz usable bandwidth for responsive human-interface feedback. | Use Scenario: Mounted on motor housings to detect early-stage bearing wear via spectral analysis of vibration harmonics. IC Role / Device Role / Timing Role: High-reliability analog sensor operating continuously at 125°C ambient. Use Value: Supports predictive maintenance by resolving 2nd–5th order harmonics up to 1.2 kHz with <3% nonlinearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL320ARZ | Single-axis, ±5g range, 2.5 V supply, no self-test or status pin; 100 Hz bandwidth. | Lacks fault diagnostics and wider dynamic range; suitable only for non-safety-critical consumer motion sensing. | Select ADXL320ARZ only if supply is fixed at 2.5 V and self-test is not required. |
| MMA8451Q | I²C digital output, ±2g/±4g/±8g programmable range, embedded FIFO, 12-bit resolution, 50–200 Hz ODR. | Requires host MCU I²C interface and firmware configuration; lacks analog ratiometric simplicity and direct drop-in replacement. | Choose MMA8451Q when digital integration, low power, and configurable ODR outweigh need for analog immediacy. |
Compared with ADXL320ARZ and MMA8451Q, the MMA1220EG offers guaranteed analog linearity, factory-set filtering, and hardware-level fault reporting - making it uniquely suited for industrial and automotive applications where deterministic analog behavior and system-level diagnostics are mandatory.
Availability
MMA1220EG is available at Aetrix Electronics and suitable for hard drive protection, appliance control, and industrial vibration monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MMA1220EG 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 consumer ICs with emphasis on reliability and system-level integration.
The MMA1220EG belongs to Freescale's legacy micromachined accelerometer product line, engineered for high-shock survivability, wafer-level hermetic sealing, and analog signal integrity in demanding mechanical environments.
FAQ
What is the operating temperature range for the MMA1220EG?
The MMA1220EG is specified to operate across −40°C to +125°C, making it suitable for under-hood automotive applications and industrial equipment exposed to extreme thermal cycling. This range is validated per Freescale's operating characteristics table and applies to all electrical parameters including offset, sensitivity, and self-test response.
Does the MMA1220EG require external components for basic operation?
No, the MMA1220EG requires only a 0.1 µF VDD decoupling capacitor and an RC filter (1 kΩ + 0.01 µF) on VOUT to suppress clock noise - all other functions including filtering, temperature compensation, and self-test are fully integrated. No external resistors or capacitors are needed to set sensitivity, offset, or bandwidth.
How does the STATUS pin behave during normal operation versus fault conditions?
During normal operation, the STATUS pin remains low unless pulsed high by self-test activation. It latches high upon detection of low supply voltage, clock oscillator failure, or EPROM parity error - and stays high until a valid ST pulse resets it, provided the fault condition has cleared. This behavior is defined in Freescale's Status section and verified in Table 2.
Is the MMA1220EG pin-compatible with the MMA1220D?
Yes, the MMA1220EG shares identical pinout, package (SOIC-16, Case 475-01), and electrical specifications with the MMA1220D - the only difference is the EG suffix indicating Pb-free/RoHS-compliant construction. Both devices have identical VOUT, ST, STATUS, VDD, and VSS pin assignments and functional behavior.
What is the maximum acceleration the MMA1220EG can survive without damage?
The MMA1220EG withstands up to 1500 g when powered and 2000 g when unpowered, as specified in Freescale's Maximum Ratings table. These limits apply to all axes simultaneously and define mechanical survival thresholds - not measurement range - and are validated through shock testing per industry standards.
MMA1220EG 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:
- ±8g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 250
- Bandwidth:
- 250Hz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MMA1220EG FAQ
1.How can I place an order for MMA1220EG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA1220EG 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 MMA1220EG reliable?
The price and inventory of MMA1220EG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA1220EG is usually 5 days.
3.What payment methods are accepted for MMA1220EG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA1220EG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA1220EG?
MMA1220EG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA1220EG 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 MMA1220EG?
For technical support, including MMA1220EG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA1220EG requirements.
6.How does Aetrix verify that MMA1220EG is sourced from the original manufacturer or authorized distributors?
All MMA1220EG 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 MMA1220EG meets industry standards.
7.What is the process for return or replacement of MMA1220EG?
All MMA1220EG units undergo pre-shipment inspection (PSI). If there is an issue with MMA1220EG, 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 MMA1220EG part is unused and in its original packaging.
Return procedure for MMA1220EG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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