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NXP Semiconductors MMA7261QT
- Part No.:
- MMA7261QT
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-LQFN Exposed Pad
- Datasheet:
-
MMA7261QT.pdf
- Description:
- ACCEL 2.5-10G ANALOG 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,864
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Product details
Overview
MMA7261QT from Freescale Semiconductor is a ±2.5g to ±10g three-axis capacitive micromachined accelerometer with integrated signal conditioning, factory-trimmed low-pass filtering, temperature compensation, and g-Select sensitivity configuration. It delivers ratiometric analog outputs (XOUT/YOUT/ZOUT), operates from 2.2 V to 3.6 V, draws only 500 µA active current or 3 µA in Sleep Mode, and is packaged in a 6 mm × 6 mm × 1.45 mm QFN-16 for handheld battery-powered motion sensing.
For engineers reviewing the MMA7261QT datasheet, MMA7261QT pinout, MMA7261QT application, or MMA7261QT equivalent, this device supports real-time tilt compensation, freefall detection, motion-triggered UI control, and pedometer-grade acceleration measurement - all with no external passive components required for filter configuration or zero-g calibration.
Technical Context
The MMA7261QT integrates dual surface-micromachined capacitive g-cells per axis with an ASIC using switched-capacitor C-to-V conversion, internal clock generation (11 kHz sampling), and single-pole switched-capacitor filtering. Its g-Select logic (pins 1 & 2) configures full-scale range across four discrete sensitivities without reprogramming.
Sleep Mode activation (pin 12 low) disables output stages while preserving configuration state, enabling rapid wake-up (<2 ms enable response). Ratiometric output ensures offset and sensitivity scale linearly with VDD, eliminating supply-induced errors when interfacing with microcontroller ADCs referenced to the same rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±2.5g / ±3.3g / ±6.7g / ±10g - selectable via g-Select pins; enables one hardware design to serve multiple motion-detection thresholds. |
| Output Type | Ratiometric analog voltage (XOUT/YOUT/ZOUT) - scales linearly with VDD; eliminates need for separate reference voltage in ADC interface. |
| Supply Current | 500 µA typical active, 3 µA Sleep Mode - extends battery life in portable devices such as MP3 players and smartphones. |
| Bandwidth | XY-axis: 350 Hz, Z-axis: 150 Hz - optimized for human-motion frequencies while rejecting high-frequency mechanical noise. |
| Operating Temp | –40°C to +105°C - qualified for automotive interior and industrial embedded environments without derating. |
| ESD Rating | 2000 V HBM - requires handling precautions but includes on-chip protection sufficient for standard assembly lines. |
| Package | 16-lead QFN (6 mm × 6 mm × 1.45 mm, Case 1622-02) - surface-mount compatible with automated PCB assembly and compact consumer form factors. |
Pinout & Package
Package: 16-lead QFN (6 mm × 6 mm × 1.45 mm), exposed thermal pad internally connected to VSS; non-soldered flag recommended for consumer applications per Freescale PCB guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | g-Select1 / g-Select2 | Logic inputs selecting full-scale range (00=2.5g, 10=6.7g, etc.); internal pull-down defaults to 2.5g if unconnected. |
| 3 | VDD | Power supply input (2.2–3.6 V); requires 0.1 µF decoupling capacitor placed near pin. |
| 4 | VSS | Ground reference; electrically tied to exposed die pad; must be connected to system ground plane. |
| 12 | Sleep Mode | Active-low digital input; asserts Sleep Mode at <0.8 V, resumes operation at >2.0 V; wake-up time <2 ms. |
| 13–15 | ZOUT / YOUT / XOUT | Analog voltage outputs (ratiometric, midsupply = VDD/2); each provides DC-coupled acceleration measurement per axis. |
| 5–7, 8–11, 16 | N/C | No internal connection; must remain unconnected per datasheet - not for trimming or test access in production units. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Trimmed Sensitivity & Offset | Zero-g offset and full-scale span calibrated at wafer level; eliminates need for system-level calibration or external trim components. |
| Integrated Low-Pass Filter | Single-pole switched-capacitor filter with fixed cut-off (350 Hz XY / 150 Hz Z); no external RC network required. |
| Temperature Compensation | On-die X/Y/Z temperature compensation circuits reduce drift to ±0.02 mg/°C (X), ±0.01 mg/°C (Y/Z) over operating range. |
| Robust Mechanical Design | Withstands ±2000 g shock and survives 1.8 m concrete drop tests - suitable for portable electronics subjected to handling stress. |
| Environmentally Preferred Packaging | RoHS-compliant, lead-free QFN package with halogen-free molding compound - meets global environmental compliance requirements. |
Applications
| Laptop Freefall Protection | Smartphone Motion UI |
|---|---|
Use Scenario: Detecting sudden vertical acceleration loss during laptop drop to park HDD heads before impact. IC Role / Device Role / Timing Role: Three-axis analog acceleration sensor providing real-time g-force vector magnitude and direction at 11 kHz internal sampling rate. Use Value: Enables sub-10 ms response to freefall onset using on-board threshold logic and Sleep Mode wake-up, preventing data loss. |
Use Scenario: Enabling text scrolling, motion dialing, and image stabilization by interpreting user tilt and gesture. IC Role / Device Role / Timing Role: Low-power analog motion sensor feeding MCU ADC; g-Select dynamically switches between 2.5g (UI) and 10g (impact) modes. Use Value: Delivers 4.7 mVrms noise floor and 350 Hz bandwidth - sufficient resolution for finger-level tilt detection without oversampling. |
| Pedometer Activity Tracking | Robotics Tilt Compensation |
Use Scenario: Counting steps and estimating distance traveled based on vertical hip acceleration waveform analysis. IC Role / Device Role / Timing Role: Analog-output accelerometer capturing gait cycle peaks and zero-crossings; outputs sampled by MCU at ≥100 Hz. Use Value: 2.5g full-scale mode provides 480 mV/g sensitivity - yielding ~800 mV peak-to-peak swing for walking motion, maximizing ADC dynamic range. |
Use Scenario: Correcting compass heading error caused by vehicle or platform tilt in navigation systems. IC Role / Device Role / Timing Role: Gravity vector reference sensor supplying pitch/roll angles to e-compass fusion algorithm. Use Value: Ratiometric output and <±0.02%FSO nonlinearity ensure stable tilt angle calculation across VDD variation and temperature drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-axis analog accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL335BCPZ | Wider supply range (1.8–3.6 V), higher noise (800 µg/√Hz), no g-Select or Sleep Mode; outputs require external RC filtering. | Better suited for low-voltage battery systems; lacks power-gating for ultra-low-duty-cycle monitoring. | Select ADXL335BCPZ when VDD may dip below 2.2 V or when external filtering is acceptable for cost reduction. |
| KXSC7-2050 | Digital I²C/SPI output, programmable ODR (0.78–1600 Hz), built-in FIFO, lower active current (25 µA), no analog ratiometric output. | Requires MCU firmware support for register access; eliminates ADC channel usage but adds protocol overhead. | Select KXSC7-2050 when digital interface, configurable sampling, or motion interrupt features outweigh analog simplicity. |
Compared with ADXL335BCPZ and KXSC7-2050, the MMA7261QT offers unique value in analog simplicity, factory-calibrated g-Select flexibility, and sub-3 µA Sleep Mode - making it optimal for cost-sensitive, battery-constrained designs where MCU ADC resources are available and deterministic low-latency analog response is prioritized.
Availability
MMA7261QT is available at Aetrix Electronics and suitable for laptop freefall detection, smartphone motion UI, and pedometer activity tracking requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MMA7261QT 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, known for automotive, industrial, and consumer ICs with robust qualification and system-level integration.
The MMA7261QT belongs to Freescale's MEMS accelerometer product line, designed specifically for motion-aware portable electronics - emphasizing low power, analog interface simplicity, and factory-trimmed reliability without host processor dependency.
FAQ
What is the maximum acceleration the MMA7261QT can survive without damage?
The MMA7261QT is rated for ±2000 g mechanical shock across all axes per Table 1 Maximum Ratings. This survivability is validated by concrete drop testing from 1.8 m height and qualifies the device for use in handheld consumer electronics subject to handling impacts. The MMA7261QT maintains functionality after such events provided electrical limits (e.g., VDD ≤ 3.6 V) are not exceeded during operation.
How does the g-Select feature work on the MMA7261QT?
The MMA7261QT uses two logic inputs - g-Select1 (pin 1) and g-Select2 (pin 2) - to configure full-scale range among ±2.5g, ±3.3g, ±6.7g, or ±10g. Binary combinations (00, 01, 10, 11) set internal gain; for example, 00 selects 480 mV/g sensitivity. Unconnected pins default to 00 via internal pull-down, ensuring 2.5g operation without external biasing in the MMA7261QT.
Does the MMA7261QT require external components for basic operation?
No external components are required for core operation of the MMA7261QT. Its onboard switched-capacitor filter, factory-trimmed offset/sensitivity, and ratiometric output eliminate the need for external resistors, capacitors, or calibration circuitry. A single 0.1 µF ceramic capacitor on VDD is recommended for power supply decoupling, but no external filter or reference is needed for analog output functionality.
What is the Sleep Mode current consumption of the MMA7261QT?
The MMA7261QT draws 3 µA typical current in Sleep Mode, activated by driving pin 12 (Sleep Mode) low. This ultra-low quiescent state disables analog outputs while retaining configuration, enabling rapid wake-up (<2 ms) upon high assertion. The MMA7261QT achieves this with no external control logic - only a single GPIO from the host system is required to manage power state.
Is the MMA7261QT pin-compatible with other Freescale accelerometers like the MMA7260Q?
No, the MMA7261QT is not pin-compatible with the MMA7260Q. While both are 16-pin QFN accelerometers, the MMA7260Q uses different pin assignments for g-Select and Sleep Mode functions, and its internal architecture lacks the MMA7261QT's 10g range and enhanced temperature compensation. Direct replacement would require PCB layout revision and firmware adaptation for the MMA7261QT.
MMA7261QT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-LQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- X, Y, Z
- Acceleration Range:
- ±2.5g, 3.3g, 6.7g, 10g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 480 (±2.5g) ~ 120 (±10g)
- Bandwidth:
- 350Hz (X,Y), 150Hz (Z)
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 2.2V ~ 3.6V
- Features:
- Selectable Scale, Sleep Mode
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (6x6)
MMA7261QT FAQ
1.How can I place an order for MMA7261QT through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA7261QT 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 MMA7261QT reliable?
The price and inventory of MMA7261QT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA7261QT is usually 5 days.
3.What payment methods are accepted for MMA7261QT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA7261QT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA7261QT?
MMA7261QT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA7261QT 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 MMA7261QT?
For technical support, including MMA7261QT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA7261QT requirements.
6.How does Aetrix verify that MMA7261QT is sourced from the original manufacturer or authorized distributors?
All MMA7261QT 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 MMA7261QT meets industry standards.
7.What is the process for return or replacement of MMA7261QT?
All MMA7261QT units undergo pre-shipment inspection (PSI). If there is an issue with MMA7261QT, 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 MMA7261QT part is unused and in its original packaging.
Return procedure for MMA7261QT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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