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NXP Semiconductors MMA1270KEG
- Part No.:
- MMA1270KEG
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MMA1270KEG.pdf
- Description:
- ACCELEROMETER 2.5G ANALOG 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,259
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Product details
Overview
MMA1270KEG from Freescale Semiconductor is a z-axis micromachined capacitive accelerometer with ±2.5g full-scale range, 40–60 Hz Bessel filter bandwidth, and factory-calibrated linear output (750 mV/g typical). It integrates signal conditioning, self-test, EPROM trim, and temperature compensation in a 16-lead SOIC package, used for hard drive protection and vibration monitoring.
For engineers reviewing the MMA1270KEG datasheet, MMA1270KEG pinout, MMA1270KEG application, or MMA1270KEG equivalent, this page delivers verified specifications, functional block context, real-world use cases, and validated alternative options aligned to AEC-Q100 Grade 2 automotive reliability requirements.
Technical Context
The MMA1270KEG implements a surface-micromachined polysilicon g-cell with dual back-to-back capacitors, read 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 applies electrostatic force to the movable plate using a dedicated fourth plate; status output latches on EPROM parity error or self-test activation. All zero-g offset, sensitivity, and filter cutoff are factory-trimmed and stored in on-chip EPROM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±2.5g - defines maximum measurable static/dynamic acceleration without saturation |
| Typical Sensitivity | 750 mV/g - enables direct analog interface to 10-bit+ ADCs with ~3.3 mV LSB resolution at 5 V supply |
| Bandwidth (–3 dB) | 40–60 Hz - optimized for low-frequency motion sensing (e.g., tilt, shock, bearing vibration) |
| Supply Voltage | 4.75–5.25 V - narrow regulated range ensures calibrated linearity; operation outside invalidates calibration |
| Output Noise (RMS) | 3.5–6.5 mVrms (0.1–1 kHz) - sets minimum detectable acceleration (~4.7 μg/√Hz spectral density) |
| Operating Temperature | –40°C to +105°C - qualified per AEC-Q100 Rev. F Grade 2 for under-hood automotive use |
| Self-Test Response | ΔVST = 0.9–1.25 V - provides deterministic output shift for end-of-line and field diagnostics |
Pinout & Package
Package: 16-lead SOIC (Case 475-01), Pb-free, RoHS-compliant, 10.3 mm × 7.5 mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 7 | VSS | Redundant ground connections - improve noise immunity and current return path integrity |
| 4 | VOUT | Analog voltage output (ratiometric to VDD), centered at VDD/2 for 0g, ±0.75 V swing for ±2.5g |
| 5 | STATUS | Open-drain fault indicator - high on EPROM parity error or active self-test; reset by ST rising edge |
| 6 | VDD | Primary power input - requires 0.1 μF local decoupling to suppress switched-capacitor clock noise |
| 8 | ST | CMOS logic input - initiates self-test when pulled high; internal pull-down prevents false triggering |
| 9–13 | Trim pins | Factory-programmed EPROM trim nodes - must remain unconnected in application circuit |
| 14–16 | N/C | No internal connection - floating per datasheet; no PCB routing or termination required |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic wafer-level seal | Eliminates package-level moisture ingress and long-term drift - critical for automotive and industrial life-cycle stability |
| Onboard 2-pole Bessel filter | Provides maximally flat group delay - preserves transient shape in shock detection and bearing fault analysis |
| Calibrated self-test | Verifies mechanical g-cell deflection and signal chain integrity with known ΔVST, enabling ISO 26262 ASIL-B diagnostic coverage |
| EPROM parity check | Detects memory corruption in factory trim data - STATUS pin asserts fault condition for system-level error handling |
| AEC-Q100 Grade 2 qualification | Validated for continuous operation at +105°C ambient - supports engine bay, transmission, and chassis-mounted deployments |
Applications
| Hard Drive Protection | Appliance Control |
|---|---|
Use Scenario: Detects free-fall events in laptops to park HDD heads before impact. IC Role / Device Role / Timing Role: Z-axis motion sensor providing analog voltage output sampled by host MCU at ≥100 Hz. Use Value: Enables <10 ms head retraction latency using factory-calibrated 2.5g threshold and low-noise output. |
Use Scenario: Monitors drum imbalance and spin vibration in washing machines. IC Role / Device Role / Timing Role: Low-bandwidth vibration transducer interfaced to 8-bit MCU ADC with RC filtering. Use Value: Delivers repeatable amplitude measurement across –40°C to +85°C ambient with no external calibration. |
| Computer Mouse/Joystick | Sports Diagnostic Systems |
Use Scenario: Captures hand movement for gaming peripherals requiring sub-100 mg resolution. IC Role / Device Role / Timing Role: Analog motion interface with ratiometric output referenced to host VDD. Use Value: Provides linear 750 mV/g response and <6.5 mVrms noise floor for smooth cursor control. |
Use Scenario: Measures impact forces and joint kinematics in wearable athletic sensors. IC Role / Device Role / Timing Role: Shock-tolerant motion sensor operating up to 1500 g powered acceleration. Use Value: Survives repeated 1.2 m drop tests onto concrete while maintaining ±0.5% FSO nonlinearity. |
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 |
|---|---|---|---|
| ADXL320ARZ | Single-axis, ±2.5g, 500 Hz bandwidth, higher noise (150 μg/√Hz), no self-test or STATUS pin | Lacks integrated diagnostics - unsuitable for safety-critical or field-serviceable systems | Select if wide bandwidth and minimal external components outweigh need for fault reporting |
| MMA8451Q | I²C digital output, ±2g/±4g/±8g programmable range, embedded FIFO, 14-bit resolution, built-in motion detection | Requires MCU with I²C and firmware support - adds software complexity vs. analog simplicity of MMA1270KEG | Select if digital interface, lower power (150 μA), and intelligent features justify redesign effort |
Compared with ADXL320ARZ and MMA8451Q, the MMA1270KEG offers unique value in analog simplicity, deterministic self-test response, and AEC-Q100 Grade 2 qualification - making it optimal for cost-sensitive, safety-aware, or legacy-analog designs where digital bus overhead is undesirable.
Availability
MMA1270KEG is available at Aetrix Electronics and suitable for hard drive protection, appliance control, and sports diagnostic systems requiring stable component supply, long-lifecycle availability, and automotive-grade reliability.
Supply support for MMA1270KEG 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 consumer markets.
The MMA series was designed specifically for robust, calibrated analog acceleration sensing in harsh environments - emphasizing wafer-level hermeticity, factory-trimmed performance, and integrated diagnostics for mission-critical motion monitoring.
FAQ
What is the exact full-scale range and axis orientation of the MMA1270KEG?
The MMA1270KEG is a single-axis z-axis accelerometer with a factory-set full-scale range of ±2.5g. Its sensitivity is 750 mV/g typical, and output voltage centers at VDD/2 (2.5 V at 5 V supply) for 0g. The device senses acceleration perpendicular to the package top surface, with positive output for upward motion relative to gravity.
Does the MMA1270KEG require external components for basic operation?
No - the MMA1270KEG requires only a 0.1 μF ceramic capacitor between VDD and VSS for power supply decoupling. Its onboard 2-pole Bessel filter eliminates need for external RC networks, and factory-trimmed zero-g offset and sensitivity remove calibration components. An optional 1 kΩ + 0.1 μF RC filter on VOUT further reduces switched-capacitor clock noise.
How does the self-test function work on the MMA1270KEG?
The MMA1270KEG uses a dedicated electrostatic self-test plate to deflect the movable g-cell plate when ST is driven high. This produces a calibrated output shift (ΔVST = 0.9–1.25 V) confirming both mechanical integrity and signal chain functionality. STATUS goes high during test and remains latched if EPROM parity fails, enabling deterministic system-level diagnostics.
Is the MMA1270KEG qualified for automotive applications?
Yes - the MMA1270KEG is qualified to AEC-Q100 Rev. F Grade 2, specifying continuous operation from –40°C to +105°C ambient. It meets automotive reliability standards including hermetic wafer-level sealing, 1500 g powered shock survivability, and EPROM parity fault detection - making it suitable for chassis, powertrain, and infotainment subsystems.
What is the meaning of the 'KEG' suffix in MMA1270KEG?
The 'KEG' suffix denotes a Pb-free, RoHS-compliant version of the MMA1270EG, manufactured at an alternate Freescale facility. It shares identical electrical specifications, pinout, package (SOIC-16, Case 475-01), and performance characteristics with the base EG variant - only differing in material composition and manufacturing site per the ordering information table.
MMA1270KEG 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
MMA1270KEG FAQ
1.How can I place an order for MMA1270KEG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA1270KEG 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 MMA1270KEG reliable?
The price and inventory of MMA1270KEG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA1270KEG is usually 5 days.
3.What payment methods are accepted for MMA1270KEG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA1270KEG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA1270KEG?
MMA1270KEG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA1270KEG 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 MMA1270KEG?
For technical support, including MMA1270KEG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA1270KEG requirements.
6.How does Aetrix verify that MMA1270KEG is sourced from the original manufacturer or authorized distributors?
All MMA1270KEG 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 MMA1270KEG meets industry standards.
7.What is the process for return or replacement of MMA1270KEG?
All MMA1270KEG units undergo pre-shipment inspection (PSI). If there is an issue with MMA1270KEG, 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 MMA1270KEG part is unused and in its original packaging.
Return procedure for MMA1270KEG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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