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NXP Semiconductors MMA7261QR2
- Part No.:
- MMA7261QR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-LQFN Exposed Pad
- Datasheet:
-
MMA7261QR2.pdf
- Description:
- ACCEL 2.5-10G ANALOG 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,084
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Product details
Overview
MMA7261QR2 from Freescale Semiconductor is a ±2.5g–±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 500 µA active current and 3 µA in Sleep Mode, and is housed in a 6 mm × 6 mm × 1.45 mm QFN-16 package for handheld motion-sensing applications including freefall detection and tilt compensation.
For engineers reviewing the MMA7261QR2 datasheet, MMA7261QR2 pinout, MMA7261QR2 application, or MMA7261QR2 equivalent, key selection criteria include selectable full-scale ranges (2.5g/3.3g/6.7g/10g), zero-g offset stability (±0.02%FSO), bandwidths of 350 Hz (XY) and 150 Hz (Z), 1.0 ms power-up response time, and ESD robustness (2000 V HBM).
Technical Context
The MMA7261QR2 integrates dual surface-micromachined g-cells per axis with an ASIC implementing switched-capacitor C-to-V conversion, gain control, and single-pole filtering - all without external components. Its g-Select logic (pins 1 & 2) configures internal gain to set full-scale range, while Sleep Mode (pin 12) disables output stages to reduce current to 3 µA.
Ratiometric operation ensures output offset (1.65 V at 0g, VDD = 3.3 V) and sensitivity (480 mV/g at 2.5g) scale linearly with supply voltage, enabling direct interface to microcontroller ADCs without reference voltage matching. The device features ±2000 g shock survivability and is qualified for –40°C to +105°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | Selectable: ±2.5g / ±3.3g / ±6.7g / ±10g via g-Select pins - enables one hardware design to support multiple motion-detection thresholds. |
| Supply Voltage | 2.2 V – 3.6 V - compatible with single-cell Li-ion and 3.3 V logic rails without level-shifting. |
| Active Current | 500 µA typical - supports >100-hour battery life in portable devices with periodic wake-up sampling. |
| Sleep Current | 3 µA typical - reduces standby power by >99% versus active mode for always-on motion monitoring. |
| Bandwidth (XY/Z) | 350 Hz / 150 Hz - sufficient for human-motion capture (e.g., pedometer, gaming) while rejecting high-frequency noise. |
| Zero-g Offset Drift | ±0.02 mg/°C (X), ±0.01 mg/°C (Y/Z) - maintains calibration stability across industrial temperature range. |
| Output Type | Analog ratiometric voltage (XOUT/YOUT/ZOUT) - eliminates need for external voltage reference when interfacing to MCU ADC. |
Pinout & Package
Package: 16-lead QFN (6 mm × 6 mm × 1.45 mm), Case 1622-02, exposed thermal pad internally connected to VSS but not recommended for soldering in consumer applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | g-Select1 / g-Select2 | Logic inputs selecting full-scale range (00=2.5g, 01=3.3g, 10=6.7g, 11=10g); internal pull-down defaults to 2.5g if unconnected. |
| 3 | VDD | Positive supply input (2.2–3.6 V); requires 0.1 µF decoupling capacitor placed near pin. |
| 4 | VSS | Ground reference; connects internally to exposed thermal pad. |
| 12 | Sleep Mode | Active-low digital input; low state disables outputs and reduces current to 3 µA. |
| 13–15 | ZOUT / YOUT / XOUT | Analog voltage outputs (ratiometric to VDD) representing acceleration on respective axes; each requires RC filter (1 kΩ + 0.1 µF) to suppress clock noise. |
| 5–7, 8–11, 16 | N/C | No internal connection; must remain unconnected per datasheet to avoid performance degradation. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed signal chain | Zero-g offset, sensitivity, and filter cutoff pre-calibrated - eliminates need for system-level trimming or external compensation components. |
| Integrated low-pass filter | Single-pole switched-capacitor filter with no external R/C required - simplifies PCB layout and improves noise immunity. |
| Ratiometric analog outputs | Output offset (1.65 V at 0g) and sensitivity scale linearly with VDD - enables accurate ADC conversion without separate voltage reference. |
| High shock survivability | Rated for ±2000 g mechanical shock - withstands drop testing (1.8 m onto concrete) and handling stress in portable electronics. |
| Environmentally preferred packaging | RoHS-compliant, lead-free QFN - meets global environmental regulations without performance trade-offs. |
Applications
| Laptop Freefall Protection | HDD-Based MP3 Player Safety |
|---|---|
Use Scenario: Detects sudden vertical acceleration loss during laptop drop to park HDD heads before impact. IC Role / Device Role / Timing Role: Primary inertial sensor providing real-time 3-axis acceleration data to system controller for predictive head retraction. Use Value: Prevents mechanical damage and data loss by triggering head parking within 1.0 ms of freefall onset - leveraging MMA7261QR2's fast power-up response and 2.5g sensitivity mode. |
Use Scenario: Monitors orientation and impact events in portable music players with spinning hard drives. IC Role / Device Role / Timing Role: Motion-triggered safety enabler that initiates drive spin-down upon detection of high-g shock or sustained tilt. Use Value: Extends device lifespan and data integrity using MMA7261QR2's ±2000 g shock rating and configurable 10g range for impact detection. |
| Smartphone Motion UI | Pedometer Activity Tracking |
Use Scenario: Enables text scrolling, motion dialing, and e-compass tilt compensation in mobile handsets. IC Role / Device Role / Timing Role: Core 3-axis motion sensor feeding orientation and gesture data to baseband processor or dedicated motion coprocessor. Use Value: Delivers low-noise (4.7 mVrms, 0.1–1 kHz) analog outputs with <1% nonlinearity - ensuring smooth UI responsiveness and accurate compass heading correction. |
Use Scenario: Counts steps and estimates distance traveled based on vertical acceleration peaks during walking/running. IC Role / Device Role / Timing Role: Low-power motion detector operating in 2.5g mode with Sleep Mode cycling to extend battery life between step events. Use Value: Achieves >100-hour runtime on coin-cell batteries using MMA7261QR2's 3 µA sleep current and programmable sensitivity for optimal step amplitude resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis analog-output accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL335BCPZ | Fixed ±3 g range; higher noise floor (300 µg/√Hz vs MMA7261QR2's ~170 µg/√Hz); no g-Select or Sleep Mode. | Lacks programmable range and ultra-low-power sleep - unsuitable for multi-threshold or long-battery-life designs. | Choose ADXL335BCPZ only if fixed 3g range and legacy footprint compatibility are prioritized over configurability and power efficiency. |
| KXSC7-2050 | Higher bandwidth (800 Hz XY); digital I²C/SPI output; 1.8 V min supply; no analog ratiometric output. | Requires ADC interface and firmware parsing; incompatible with direct-analog MCU connections used for MMA7261QR2. | Choose KXSC7-2050 when digital integration, higher bandwidth, or lower supply voltage (<2.2 V) are mandatory - not for drop-in analog replacement. |
Compared with ADXL335BCPZ and KXSC7-2050, the MMA7261QR2 uniquely combines selectable full-scale range, true analog ratiometric outputs, sub-µA sleep current, and factory-trimmed performance in a single QFN package - making it optimal for cost-sensitive, battery-constrained motion systems requiring hardware-configurable sensitivity.
Availability
MMA7261QR2 is available at Aetrix Electronics and suitable for laptop freefall protection, smartphone motion UI, and pedometer activity tracking requiring stable component supply across automotive-qualified temperature ranges and long-lifecycle production programs.
Supply support for MMA7261QR2 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 MMA7261QR2 belongs to Freescale's MEMS accelerometer product line, designed specifically for ultra-low-power, high-reliability motion sensing in battery-operated portable electronics - emphasizing ease of integration, factory calibration, and robust mechanical survivability.
FAQ
What is the operating temperature range of the MMA7261QR2?
The MMA7261QR2 is specified for continuous operation from –40°C to +105°C. This extended industrial temperature range ensures reliable performance in demanding environments such as laptop chassis, automotive infotainment enclosures, and outdoor portable devices - matching the qualification of its pin-compatible variant MMA7261QT.
How does the g-Select feature work on the MMA7261QR2?
The MMA7261QR2 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. With binary encoding (00/01/10/11), it changes internal gain without external components. Leaving both pins unconnected defaults to 2.5g mode via internal pull-downs, simplifying designs needing only one sensitivity.
What is the purpose of the Sleep Mode function in the MMA7261QR2?
Sleep Mode in the MMA7261QR2 reduces supply current from 500 µA to 3 µA by disabling analog output stages while retaining configuration state. Activated via a low signal on pin 12 (Sleep Mode), it enables ultra-low-power monitoring in battery-powered devices like pedometers and remote controls - extending operational life without sacrificing wake-up responsiveness (1.0 ms recovery).
Can the MMA7261QR2 be used with a 1.8 V supply?
No, the MMA7261QR2 requires a minimum supply voltage of 2.2 V and maximum of 3.6 V. Operation below 2.2 V is outside specification and may result in undefined output behavior or failure to power up reliably - especially below 0°C where dV/dt requirements become critical. For 1.8 V systems, consider alternative accelerometers such as the KXSC7-2050.
Is the MMA7261QR2 RoHS-compliant and lead-free?
Yes, the MMA7261QR2 is RoHS-compliant and manufactured in a lead-free process per Freescale's environmental program. Its QFN-16 package (Case 1622-02) meets JEDEC standards for Pb-free reflow profiles, and all specifications - including electrical performance and thermal ratings - are identical to non-RoHS versions of the MMA7261QR2.
MMA7261QR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-LQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
MMA7261QR2 FAQ
1.How can I place an order for MMA7261QR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA7261QR2 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 MMA7261QR2 reliable?
The price and inventory of MMA7261QR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA7261QR2 is usually 5 days.
3.What payment methods are accepted for MMA7261QR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA7261QR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA7261QR2?
MMA7261QR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA7261QR2 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 MMA7261QR2?
For technical support, including MMA7261QR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA7261QR2 requirements.
6.How does Aetrix verify that MMA7261QR2 is sourced from the original manufacturer or authorized distributors?
All MMA7261QR2 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 MMA7261QR2 meets industry standards.
7.What is the process for return or replacement of MMA7261QR2?
All MMA7261QR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA7261QR2, 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 MMA7261QR2 part is unused and in its original packaging.
Return procedure for MMA7261QR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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