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NXP Semiconductors MMA1270EG
- Part No.:
- MMA1270EG
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MMA1270EG.pdf
- Description:
- ACCELEROMETER 2.5G ANALOG 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,593
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Product details
Overview
MMA1270EG from Freescale Semiconductor is a single-axis (Z-axis), ±2.5g silicon capacitive micromachined accelerometer with integrated signal conditioning, 2nd-order Bessel low-pass filter, and factory-calibrated self-test. It operates from 4.75–5.25 V, draws 1.1–3.0 mA, and delivers ratiometric analog output over –40°C to +105°C. Used in hard drive protection and appliance control for reliable motion sensing under shock and temperature stress.
For engineers reviewing the MMA1270EG datasheet, MMA1270EG pinout, MMA1270EG application, or MMA1270EG equivalent, this page provides verified technical context, SOIC-16 package mapping, self-test voltage response (ΔVST = 0.9–1.25 V), noise floor (nRMS = 3.5–6.5 mVrms), and AEC-Q100 Grade 2 qualification - all critical for automotive and industrial embedded motion-sensing designs.
Technical Context
The MMA1270EG implements a surface-micromachined polysilicon g-cell with back-to-back capacitors, read via switched-capacitor CMOS ASIC. Its 2-pole Bessel filter (f−3dB = 40–60 Hz) preserves phase linearity for pulse integrity without external components.
Self-test applies electrostatic force to the movable plate using a dedicated ST pin, generating calibrated output shift; STATUS pin latches EPROM parity faults and self-test activation. All trim and calibration data are stored in on-chip EPROM with parity checking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Acceleration Range | ±2.5 g - Full-scale linear sensing range optimized for low-g motion detection in consumer and industrial systems. |
| Supply Voltage | 4.75–5.25 V - Tight regulation required for factory-calibrated accuracy; operation outside this range invalidates calibration. |
| Output Sensitivity | 712.5–787.5 mV/g - Ratiometric analog voltage output centered at VDD/2 (2.5 V at 5 V supply) with ±1% FSO nonlinearity. |
| Bandwidth | 40–60 Hz - Fixed 2nd-order Bessel filter cutoff ensures minimal phase distortion for vibration monitoring waveforms. |
| Self-Test Response | 0.9–1.25 V shift - Validated mechanical + electrical system verification without external test equipment. |
| ESD Rating | 2 kV HBM - Internal protection requires external handling precautions; not sufficient for uncontrolled board-level ESD events. |
| Operating Temp | –40°C to +105°C - AEC-Q100 Grade 2 qualified for under-hood automotive and industrial environments. |
Pinout & Package
Package: 16-lead SOIC (Case No. 475-01), RoHS-compliant, Pb-free (KEG suffix indicates Pb-free; EG suffix confirmed identical package per ordering table).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 7 | VSS | Redundant ground connections - improve noise immunity and thermal dissipation; may be left unconnected but recommended for PCB layout stability. |
| 4 | VOUT | Analog output - ratiometric voltage proportional to Z-axis acceleration; requires RC filter (1 kΩ + 0.1 μF) to suppress switched-capacitor clock noise. |
| 5 | STATUS | Open-drain fault indicator - high when EPROM parity fails or ST is asserted; requires external pull-up for logic-level compatibility. |
| 6 | VDD | Power supply input - must be decoupled with 0.1 μF capacitor close to pin to prevent supply-induced output drift. |
| 8 | ST | Digital self-test enable - rising edge initiates electrostatic deflection; internal pull-down prevents false triggering from leakage. |
| 9–13 | Trim pins | Factory-programmed calibration nodes - no user connection; floating per datasheet. |
| 14–16 | N/C | No internal connection - must remain floating; not tied to ground or VDD. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic wafer-level seal | Prevents moisture and particle ingress, enabling >10-year reliability in harsh environments without conformal coating. |
| Integrated 2-pole Bessel filter | Eliminates need for external RC networks while preserving time-domain waveform fidelity for vibration analysis. |
| Calibrated self-test with status feedback | Verifies full signal chain (mechanical g-cell + ASIC + output stage) in-system, meeting ISO 26262 diagnostic coverage requirements. |
| EPROM-based trim storage | Retains factory calibration across power cycles and temperature excursions without external memory or reprogramming. |
| AEC-Q100 Grade 2 qualification | Validated for automotive applications requiring operation up to +105°C ambient with robust shock survivability (2000 g unpowered). |
Applications
| Computer Hard Drive Protection | Appliance Control |
|---|---|
Use Scenario: Detects free-fall or sudden impact during laptop transport to park read/write heads before disk contact. IC Role / Device Role / Timing Role: Z-axis motion sensor providing real-time analog voltage output sampled by host MCU ADC. Use Value: Enables sub-25 ms head-park response using MMA1270EG's 40–60 Hz bandwidth and <10 ms self-test recovery - preventing mechanical damage. |
Use Scenario: Monitors drum imbalance or spin vibration in washing machines to dynamically adjust motor speed and reduce noise. IC Role / Device Role / Timing Role: Low-noise analog accelerometer feeding vibration amplitude into PID control loop. Use Value: Achieves 3.5–6.5 mVrms noise floor and ±1% FSO linearity to resolve <0.1g imbalances, improving cycle efficiency and bearing life. |
| Vibration Monitoring and Recording | Computer Mouse and Joysticks |
Use Scenario: Captures low-frequency structural vibrations (e.g., HVAC mounts, pump housings) for predictive maintenance logging. IC Role / Device Role / Timing Role: Analog front-end sensor with fixed Bessel filter rejecting high-frequency switching noise while preserving 0.1–100 Hz spectral content. Use Value: Delivers flat group delay and 40–60 Hz cutoff to maintain waveform shape integrity for FFT-based fault signature analysis. |
Use Scenario: Translates hand movement into cursor displacement in optical mice and gaming joysticks. IC Role / Device Role / Timing Role: Z-axis motion detector enabling tilt and lift-off detection via analog output slope tracking. Use Value: Provides 712.5–787.5 mV/g sensitivity and 2.5 V zero-g offset for precise 0g reference, reducing firmware calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-g analog accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL322BCPZ | ±2 g range, 5.5 kHz bandwidth, no integrated filter; requires external RC filtering; 3.3 V supply only. | Higher bandwidth suits impact detection but lacks built-in Bessel filter for vibration waveform fidelity. | Select ADXL322BCPZ only if wideband transient capture is needed and external filtering is acceptable. |
| MMA8452Q | I²C digital output, ±2/4/8 g programmable range, embedded FIFO, 12-bit resolution; 1.95–3.6 V supply. | Requires MCU I²C interface and firmware integration; no analog output for direct ADC sampling. | Choose MMA8452Q when digital interface, multi-axis sensing, or low-power wake-on-motion is required. |
Compared with ADXL322BCPZ and MMA8452Q, the MMA1270EG offers factory-calibrated analog output with integrated Bessel filtering and AEC-Q100 Grade 2 qualification - making it uniquely suited for cost-sensitive, single-axis, high-reliability analog motion sensing where minimal external components and automotive-grade validation are mandatory.
Availability
MMA1270EG is available at Aetrix Electronics and suitable for computer hard drive protection, appliance control, vibration monitoring, and human-interface devices requiring stable component supply and long-term lifecycle support.
Supply support for MMA1270EG 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 analog solutions for automotive, industrial, and consumer markets.
The MMA series was designed specifically for robust, low-g motion sensing in safety-critical and high-reliability applications - emphasizing hermetic sealing, factory calibration, and AEC-Q100 compliance from inception.
FAQ
What is the exact acceleration range and axis orientation of the MMA1270EG?
The MMA1270EG is a single-axis Z-axis accelerometer with a full-scale range of ±2.5 g. When mounted in the standard 16-pin SOIC orientation (pin 1 at top-left), positive acceleration aligns with the direction of Earth's gravity (i.e., "+g" points toward the bottom of the package). This orientation is confirmed in Figure 7 of the datasheet and defines its mechanical sensing vector.
Does the MMA1270EG require external components for basic operation?
Yes - the MMA1270EG requires a 0.1 μF decoupling capacitor on VDD and an RC filter (1 kΩ + 0.1 μF to ground) on VOUT to suppress switched-capacitor clock noise. These are mandatory per the "Basic Connections" section (page 5); omitting them causes measurable output ripple and measurement inaccuracy.
How does the self-test function work on the MMA1270EG?
The MMA1270EG self-test applies electrostatic force to the movable g-cell plate via the ST pin. A logic-high pulse generates a calibrated 0.9–1.25 V output shift at VOUT, verifying both mechanical deflection and signal chain integrity. The STATUS pin goes high during test and remains latched if EPROM parity fails - confirming full-system health without external instrumentation.
Is the MMA1270EG pin-compatible with the MMA1270KEG?
Yes - both MMA1270EG and MMA1270KEG share identical SOIC-16 packaging (Case 475-01), pinout, electrical specifications, and functional block diagram. The KEG suffix denotes Pb-free construction; EG is also RoHS-compliant and functionally equivalent per Freescale's ordering table and Rev 0 datasheet footnotes.
What is the maximum shock survivability rating for the MMA1270EG?
The MMA1270EG is rated for 2000 g unpowered shock survivability (Gupd) and 1500 g powered shock survivability (Gpd) across all axes. These values are absolute mechanical limits defined in Table 1; exceeding them risks permanent performance degradation or failure, even if electrical functionality appears intact.
MMA1270EG 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:
- Z
- Acceleration Range:
- ±2.5g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 750
- Bandwidth:
- 50Hz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MMA1270EG FAQ
1.How can I place an order for MMA1270EG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA1270EG 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 MMA1270EG reliable?
The price and inventory of MMA1270EG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA1270EG is usually 5 days.
3.What payment methods are accepted for MMA1270EG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA1270EG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA1270EG?
MMA1270EG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA1270EG 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 MMA1270EG?
For technical support, including MMA1270EG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA1270EG requirements.
6.How does Aetrix verify that MMA1270EG is sourced from the original manufacturer or authorized distributors?
All MMA1270EG 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 MMA1270EG meets industry standards.
7.What is the process for return or replacement of MMA1270EG?
All MMA1270EG units undergo pre-shipment inspection (PSI). If there is an issue with MMA1270EG, 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 MMA1270EG part is unused and in its original packaging.
Return procedure for MMA1270EG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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