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NXP Semiconductors MMA1260EG
- Part No.:
- MMA1260EG
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MMA1260EG.pdf
- Description:
- ACCEL 1.55G ANALOG 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,031
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Product details
Overview
MMA1260EG from Freescale Semiconductor is a low-g, single-axis (Z-axis), silicon capacitive micromachined accelerometer with integrated signal conditioning, 2nd-order Bessel low-pass filter, and factory-calibrated self-test. It delivers ±1.5g full-scale range, 1140–1290 mV/g sensitivity, 40–60 Hz –3 dB bandwidth, and operates over –40°C to +105°C in automotive-grade SOIC-16 packaging. Used in hard drive protection and appliance control systems requiring reliable motion sensing under shock and temperature stress.
For engineers reviewing the MMA1260EG datasheet, MMA1260EG pinout, MMA1260EG application, or MMA1260EG equivalent, this page provides verified technical context, validated pin functions, real-world use scenarios, and confirmed alternative parts for vibration monitoring, mechanical bearing diagnostics, and embedded safety-critical motion detection.
Technical Context
The MMA1260EG implements a surface-micromachined polysilicon g-cell with back-to-back capacitive sensing plates, read out via switched-capacitor CMOS ASIC. Its 2-pole Bessel filter preserves pulse shape integrity with linear phase response and no external components required.
Self-test is activated by a logic-high ST input, applying electrostatic force to deflect the movable plate; resulting output shift (ΔVST = 0.3–0.9 V) verifies mechanical and electronic integrity. Fault detection latches on EPROM parity error or clock failure, signaled via STATUS pin-resettable only by ST pulse if fault persists.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±1.5 g - defines maximum measurable acceleration before saturation; enables precise low-g motion capture in consumer and industrial devices. |
| Sensitivity | 1140–1290 mV/g - output voltage change per g of acceleration; calibrated at 1g and ratiometric to VDD for supply independence. |
| Bandwidth (–3 dB) | 40–60 Hz - usable frequency response for slow-varying motion like tilt or shock detection; limited by internal Bessel filter. |
| Supply Voltage | 4.75–5.25 V - guaranteed calibration range; operation outside this window yields linear but uncalibrated output. |
| Supply Current | 1.1–3.2 mA - quiescent current across temperature; supports low-power embedded systems without active sleep modes. |
| Zero-g Offset | 2.2–2.8 V at VDD = 5.0 V - mid-supply centered output at rest; enables bidirectional measurement with single-ended ADC interface. |
| Output Noise (RMS) | 5.0–9.0 mVrms (0.1–1.0 kHz) - limits resolution to ~0.004–0.008 g RMS; suitable for vibration monitoring above 0.1 Hz. |
Pinout & Package
Package: 16-lead SOIC (Case No. 475-01), RoHS-compliant, Pb-free (KEG suffix). Pin layout optimized for minimal noise coupling and mechanical stability in PCB-mounted applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS (Pins 1–3, 7) | Power Ground | Redundant ground connections reduce impedance and improve noise immunity; all must be connected to system ground plane. |
| VDD (Pin 6) | Supply Input | 5 V nominal supply; requires 0.1 μF decoupling capacitor close to pin to suppress switching noise from internal oscillator. |
| VOUT (Pin 4) | Analog Output | Single-ended ratiometric voltage output; requires RC filter (1 kΩ + 0.1 μF) to attenuate 70 kHz clock feedthrough. |
| STATUS (Pin 5) | Fault Indicator | Open-drain logic output; high indicates EPROM parity error, clock fault, or self-test activation; reset via ST pulse. |
| ST (Pin 8) | Digital Control Input | Active-high self-test trigger; internal pull-down prevents false initiation; ≥100 μs pulse required for latch reset. |
| Pins 9–13 | Factory Trim | No external connection; used during production calibration; floating or tied to VSS/VDD invalidates calibration. |
| Pins 14–16, N/C | No Connection | Internally unconnected; must remain floating per datasheet; routing traces to them risks parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Wafer-Level Seal | Transducer sealed at wafer level using bulk-micromachined cap wafer-ensures long-term reliability in humid or contaminated environments. |
| Calibrated Self-Test | Electrostatic deflection generates known output shift (0.3–0.9 V); validates full signal chain including g-cell mechanics and ASIC readout. |
| AEC-Q100 Grade 2 Qualification | Qualified for automotive applications from –40°C to +105°C ambient; includes thermal cycling, humidity, and shock survivability testing. |
| Onboard 2-Pole Bessel Filter | Switched-capacitor implementation eliminates external R/C components while preserving linear phase-critical for time-domain fidelity in shock analysis. |
| EPROM Parity Check | Real-time parity validation of trim data; STATUS pin latches high on odd parity, enabling field-detectable calibration corruption. |
Applications
| Hard Drive Protection | Appliance Control |
|---|---|
Use Scenario: Detects free-fall or sudden impact events in laptop computers to park read/write heads before physical contact occurs. IC Role / Device Role / Timing Role: Z-axis motion sensor providing analog voltage output proportional to gravitational acceleration; sampled at ≥100 Hz by host microcontroller. Use Value: Prevents disk damage by initiating head retraction within 25 ms of impact detection-enabled by fast self-test verification and low-latency analog output path. |
Use Scenario: Monitors drum imbalance or door slam force in washing machines to adjust spin speed or lock mechanism timing. IC Role / Device Role / Timing Role: Low-g motion detector interfaced to MCU ADC; outputs conditioned voltage representing static tilt and dynamic vibration magnitude. Use Value: Enables adaptive motor control and safety interlocks using factory-calibrated offset and sensitivity-no field calibration required. |
| Mechanical Bearing Monitoring | Computer Mouse / Joystick |
Use Scenario: Mounted on industrial pump housings to detect abnormal vibration harmonics indicating early-stage bearing wear. IC Role / Device Role / Timing Role: Analog vibration transducer feeding signal-conditioned output to FFT-capable processor; bandwidth limited to 60 Hz avoids aliasing. Use Value: Supports predictive maintenance by resolving sub-1g vibration amplitudes with <0.01 g RMS noise floor-validated via EPROM-trimmed nonlinearity (<±1.0% FSO). |
Use Scenario: Captures hand movement acceleration for cursor positioning or game controller input in USB/HID peripherals. IC Role / Device Role / Timing Role: Z-axis motion sensor delivering linear, low-noise analog output to microcontroller's 10-bit ADC with minimal external filtering. Use Value: Provides jitter-free pointer tracking with factory-set zero-g offset (2.2–2.8 V) eliminating software nulling routines in firmware. |
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 |
|---|---|---|---|
| ADXL326BCPZ | Wider ±16 g range, higher 5.5 kHz bandwidth, 3-axis output; requires external filtering; no self-test or STATUS pin. | Better suited for high-frequency vibration analysis; lacks built-in fault detection and automotive qualification. | Select ADXL326BCPZ when multi-axis data and wide bandwidth outweigh need for integrated diagnostics and AEC-Q100 compliance. |
| MMA8452Q | I²C digital output, 12-bit resolution, embedded motion detection engine; lower power (65 μA in standby); no analog output or Bessel filter. | Designed for ultra-low-power portable devices with host MCU-based processing; lacks analog interface and deterministic analog latency. | Choose MMA8452Q for battery-powered systems needing intelligent wake-up and configurable thresholds-MMA1260EG remains preferred for analog-signal-chain simplicity and deterministic timing. |
Compared with ADXL326BCPZ and MMA8452Q, the MMA1260EG offers unique value in automotive-qualified, self-testing, single-axis analog output with factory-set Bessel filtering-eliminating design effort for calibration, fault monitoring, and anti-aliasing in cost-sensitive embedded motion systems.
Availability
MMA1260EG is available at Aetrix Electronics and suitable for hard drive protection, appliance control, mechanical bearing monitoring, and computer peripheral motion sensing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MMA1260EG 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 automotive electronics.
The MMA series was designed specifically for robust, low-g motion sensing in automotive and industrial environments-emphasizing hermetic reliability, factory calibration, and integrated diagnostics over raw performance metrics.
FAQ
What is the operating temperature range for the MMA1260EG?
The MMA1260EG is qualified for operation from –40°C to +105°C ambient temperature and meets AEC-Q100 Grade 2 requirements. This range ensures reliable performance in under-hood automotive applications and industrial equipment exposed to thermal cycling. The device maintains calibrated sensitivity and zero-g offset across this full range, as verified by Freescale's production test flow.
Does the MMA1260EG require external components for basic operation?
The MMA1260EG requires only a 0.1 μF decoupling capacitor on VDD and an RC filter (1 kΩ + 0.1 μF) on VOUT for optimal noise suppression-no external resistors or capacitors are needed for gain, offset, or filter tuning. All calibration, filtering, and self-test circuitry are fully integrated, making the MMA1260EG a true single-chip solution for analog motion sensing.
How does the self-test function work on the MMA1260EG?
The MMA1260EG self-test applies an electrostatic force to the movable g-cell plate via the ST pin, producing a known output shift of 0.3–0.9 V at VOUT. This verifies both mechanical integrity (g-cell deflection) and electronic functionality (ASIC signal path). The STATUS pin reflects self-test activation and latches fault conditions, enabling system-level diagnostic coverage without external test equipment.
Is the MMA1260EG pin-compatible with other devices in the MMA1260 family?
Yes-the MMA1260EG shares identical pinout, package (SOIC-16, Case 475-01), and electrical interface with MMA1260KEG and MMA1260EGR2. Differences are limited to manufacturing site and reel packaging; all variants use the same die, calibration, and functional specifications. No PCB redesign is needed when substituting between these part numbers.
What is the significance of the "KEG" suffix in related part numbers like MMA1260KEG?
The "KEG" suffix denotes a Pb-free, RoHS-compliant version of the MMA1260 device, manufactured at a different Freescale facility. Electrically and mechanically identical to the MMA1260EG, it carries the same AEC-Q100 qualification and functional specifications. The MMA1260EG and MMA1260KEG are interchangeable in design-only material compliance and traceability differ.
MMA1260EG 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:
- ±1.55g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 1200
- 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
MMA1260EG FAQ
1.How can I place an order for MMA1260EG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA1260EG 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 MMA1260EG reliable?
The price and inventory of MMA1260EG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA1260EG is usually 5 days.
3.What payment methods are accepted for MMA1260EG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA1260EG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA1260EG?
MMA1260EG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA1260EG 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 MMA1260EG?
For technical support, including MMA1260EG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA1260EG requirements.
6.How does Aetrix verify that MMA1260EG is sourced from the original manufacturer or authorized distributors?
All MMA1260EG 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 MMA1260EG meets industry standards.
7.What is the process for return or replacement of MMA1260EG?
All MMA1260EG units undergo pre-shipment inspection (PSI). If there is an issue with MMA1260EG, 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 MMA1260EG part is unused and in its original packaging.
Return procedure for MMA1260EG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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