MMA6271QR2 - ±2.5/3.3/6.7/10g 2-Axis Accelerometer QFN-16 | NXP
MPN： MMA6271QR2 ✓ 啟用中MMA6271QR2 概覽
An accelerometer is a micro-electromechanical sensor (MEMS) that transduces gravitational or inertial acceleration along one or more axes into a measurable electrical signal. In the broader taxonomy, this part sits under sensor -> motion sensor -> inertial sensor -> MEMS accelerometer. The MMA6271QR2's dual-axis (X, Y) sensing, combined with selectable full-scale range via the g-Select logic input, makes it suitable for tilt, vibration, and shock detection applications where orientation and motion context must be derived from gravity.
Key differentiating specifications include four user-selectable acceleration ranges (±2.5g / 3.3g / 6.7g / 10g), a 16-QFN-6x6 leadless package that saves board area vs older 16-LGA or 16-QFN competing parts, integrated temperature compensation, and a built-in 1-pole low-pass filter for bandwidth limiting without external RC stages. The device operates from a single low-voltage supply and produces ratiometric analog outputs proportional to applied acceleration.
The MMA6271QR2 uses a capacitive sensing cell whose differential capacitance changes with proof-mass deflection; on-chip CMOS ASIC performs charge integration, gain, offset trim, and temperature compensation. The ratiometric analog interface (VOUT proportional to VDD) simplifies connection to common ADCs and microcontrollers without level shifting. The selectable full-scale range, gated by the g-Select pin, preserves dynamic range when high-g events occur.
Typical applications include appliance tilt sensing, portable device screen rotation, gaming controllers, vibration analysis in HVAC and rotating equipment, free-fall detection in hard-drive protection, and industrial tilt/inclination monitoring. The 350 Hz bandwidth (per DigiKey listing) supports tilt sensing as well as low-frequency vibration analysis. Designers should select the appropriate g-range for their expected peak events and route the analog outputs to an ADC with adequate sample rate.
直接替換替代品，適用於 MMA6271QR2 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MMA6271QR2 （相同外形與佔位） — 差異在於 Bandwidth, Output Type, Package, Sensor Type.
MMA6270QR2
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MMA6271QR2
✅ 直接替換聯絡詢價
查看資料表 →MMA6271QR2 最大額定值與電氣特性
| 感測器類型 | Accelerometer, 2-Axis (X, Y) |
| Technology | Capacitive MEMS |
| Selectable Acceleration Range | ±2.5g, 3.3g, 6.7g, 10g (g-Select) |
| Number of Axes | 2 (X, Y) |
| 輸出類型 | Analog, Ratiometric |
| Bandwidth | 350 Hz |
| Filter | 1-pole low-pass, integrated |
| Temperature Compensation | Yes, integrated |
| 封裝 | 16-QFN (LDS), 6x6 mm |
| 安裝類型 | Surface Mount |
| Lead Free / RoHS Status | Lead Free / RoHS Compliant |
| Shipping Format | Tape & Reel, 1000 pcs (QR2 suffix) |
MMA6271QR2 16-qfn (lds), 6x6 mm 腳位配置指南
MMA6271QR2（16-qfn (lds), 6x6 mm 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： MMA6271QR2.
請參閱 資料表 以查看完整腳位配置。
典型應用
MMA6271QR2 適用於 6 應用s: Appliance Tilt and Inclination Sensing, Portable Device Screen Rotation, Gaming Controller Motion Input, Industrial Vibration Monitoring, Hard-Drive Free-Fall Detection, Security System Tamper Detection.
Appliance Tilt and Inclination Sensing
The MMA6271QR2 fits appliance tilt sensing because its selectable ±2.5g to 10g ranges cover both subtle tilt angles (high sensitivity at ±2.5g) and shock events during transport (low sensitivity at ±10g) on the same X/Y axes. The 16-QFN 6x6 mm footprint allows direct mounting inside compact appliance control PCBs. The 350 Hz bandwidth supports real-time tilt response for washing-machine drum-balancing or refrigerator-door angle detection. The ratiometric analog output interfaces directly to a low-cost MCU ADC, eliminating the need for a digital accelerometer bus. Integrated 1-pole LPF rejects high-frequency vibration from pumps and motors without external RC components.
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Portable Device Screen Rotation
Handheld consumer devices use the MMA6271QR2 to detect gravity orientation for automatic landscape/portrait screen rotation. The dual-axis X/Y sensing captures the dominant gravity vector components, and the selectable g-range (±2.5g to ±10g) lets the firmware reject hand-motion artefacts by switching to a less-sensitive range during active use. The 16-QFN 6x6 mm package suits space-constrained tablet and phone-form-factor boards. The ratiometric analog output pairs naturally with embedded MCU ADCs and the on-chip temperature compensation keeps the orientation reading stable across operating temperatures.
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Gaming Controller Motion Input
Game controllers rely on accelerometers like the MMA6271QR2 to detect steering, tilt, and gesture inputs. The ±2.5g/3.3g/6.7g/10g selectable ranges let the controller distinguish gentle tilt (selectable high sensitivity) from rapid shake gestures (lower sensitivity to avoid saturation). The 350 Hz bandwidth is sufficient for typical 30-60 Hz gesture dynamics while rejecting high-frequency hand jitter via the on-chip 1-pole filter. The 16-QFN 6x6 mm package fits inside standard controller enclosures, and the ratiometric analog output simplifies the interface to legacy MCU architectures.
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Industrial Vibration Monitoring
HVAC, motor, and rotating-equipment condition monitoring use the MMA6271QR2 to detect imbalance, misalignment, and bearing wear signatures in the 1-350 Hz range. The selectable full-scale lets the firmware adapt sensitivity to the expected vibration amplitude of each monitored asset. The integrated 1-pole low-pass filter prevents aliasing when the analog output is sampled by an MCU ADC. The integrated temperature compensation maintains sensitivity accuracy across industrial ambient ranges, and the 16-QFN 6x6 mm package withstands typical industrial PCB environments.
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Hard-Drive Free-Fall Detection
Portable computing platforms historically used accelerometers such as the MMA6271QR2 to detect free-fall events and park hard-drive heads before impact. The X/Y axes detect the sudden zero-g transition characteristic of free-fall, and the selectable g-ranges allow tuning the trigger threshold for different device mass profiles. The fast 350 Hz analog response captures the brief free-fall onset reliably, while the ratiometric output integrates directly with embedded controller interrupt logic. Newer designs typically use digital 3-axis parts, but the MMA6271QR2 remains pin-compatible for legacy HDD-protection board retrofits.
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Security System Tamper Detection
Wall-mounted security panels and ATMs use the MMA6271QR2 to detect tilt, vibration, or shock that indicates tampering. The selectable ±2.5g to ±10g ranges cover both subtle cabinet-tilt attempts (high sensitivity) and aggressive strikes (lower sensitivity for dynamic range). The 16-QFN 6x6 mm package fits inside compact security enclosures, and the analog output can drive either an MCU interrupt pin via a comparator or a polled ADC channel. Integrated temperature compensation ensures consistent tamper thresholds across indoor thermal environments.
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推薦產品摘要
工程參考資料，適用於 MMA6271QR2 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MMA6270QR2 | MMA7260QT |
|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 16-QFN-6x6 (LDS) | 16-QFN-6x6 - same | QFN-16 - same outline |
| Sensor Type | 2-axis accelerometer (X, Y) | 2-axis accelerometer (X, Y) | 3-axis accelerometer (X, Y, Z) |
| Output Type | Analog, ratiometric | Analog, ratiometric | Analog, ratiometric |
| Integrated Filter | 1-pole low-pass | 1-pole low-pass | 1-pole low-pass |
| Shipping Format | Tape & Reel, 1000 pcs (QR2) | Tape & Reel, 1000 pcs (QR2) | Tray (QT) |
| RoHS Compliance | Compliant, Lead Free | Compliant, Lead Free | Compliant, Lead Free |
主要差異化特點
- Wider selectable sensitivity with 4 g-ranges (對比MMA7260QT)
- Lower-cost 2-axis configuration (對比MMA7260QT)
- Integrated 1-pole LPF without external RC (對比Raw analog MEMS sensor without filter)
設計說明
Estimated: The MMA6271QR2 operates from a low-voltage supply (typical MEMS accelerometer range 2.2-3.6 V) and draws low quiescent current. Decouple VDD with a 0.1 µF ceramic capacitor placed within 3 mm of the supply pin, plus a bulk 1-10 µF tantalum or aluminum polymer capacitor to suppress motor and switching noise on shared rails. Reference decoupling is critical because the analog outputs are ratiometric to VDD; noisy supply directly couples to the output.
Place the MMA6271QR2 with the QFN die-pad soldered to a continuous ground pour for thermal dissipation and mechanical stability. Avoid routing noisy digital or switching traces directly under the sensor footprint; the exposed pad is the ground reference for the on-chip ASIC and acts as an EMI shield. Keep high-frequency signal traces at least 3 mm away from the X/Y sensor axes to prevent capacitive crosstalk into the analog outputs.
Do not assume the ratiometric analog output is at zero-g offset of VDD/2 without measuring — calibrate each unit at zero-g in the final assembled orientation. Avoid mechanically stressing the 16-QFN package; the leadless QFN can crack under excessive board flex, causing sensor drift or failure. Apply the g-Select logic level before or at power-up, since late transitions may not retrigger the on-chip range logic without a reset cycle.
合規資訊
Lead-free and RoHS-compliant per distributor listings (DigiKey, digchip). AEC-Q100 not applicable for this consumer/industrial-grade MEMS part. REACH, halogen-free, and conflict-mineral status flagged as [DATA_NEEDED] pending manufacturer datasheet confirmation.
