MMA6270QT - ±1.5g-6g Dual-Axis Accelerometer | NXP | 16-QFN
부품 번호: MMA6270QT ✗ 단종| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $8.92 | $8.92 |
| 10 | $7.95 | $79.50 |
| 100 | $6.4 | $640.00 |
| 500 | $5.12 | $2,560.00 |
| 1,000 | $4.35 | $4,350.00 |
MMA6270QT 개요
An accelerometer is a micro-electromechanical systems (MEMS) sensor that measures linear acceleration along one or more axes by detecting the displacement of a proof mass suspended by compliant springs. The MMA6270QT belongs to the capacitive-sensing accelerometer family, where displacement changes the gap of a differential capacitor and is read out as an analog signal. Within the broader sensor hierarchy, it sits under inertial sensors -> motion sensors -> MEMS sensors. Capacitive MEMS accelerometers offer lower power consumption than piezoresistive types and are widely used in battery-powered motion-enabled products.
Key features include four user-selectable sensitivities via the g-Select pin (1.5g/2g/4g/6g), integrated temperature compensation across -40°C to +105°C, low current consumption (typically under 1 mA), and self-test functionality that verifies mechanical and electrical integrity at power-up. The MMA6270QT also provides a ratiometric analog output that scales with the supply voltage, which allows direct ADC interfacing without precision voltage references. The 16-QFN (6x6) package exposes a thermal pad for improved PCB thermal performance and mechanical stability.
Typical applications include tilt sensing in appliances and gaming, freefall detection for hard-disk drive protection, motion-activated user interfaces, vibration monitoring in industrial equipment, and orientation detection in portable electronics. Designers value the g-Select feature because it lets a single part serve multiple sensitivity requirements across product variants, reducing BOM complexity. Compared with discrete accelerometer designs that require external op-amps and filters, the MMA6270QT integrates the entire analog signal chain on a single die.
When designing with this device, place 0.1 µF decoupling capacitors close to VDD and add a 10 µF bulk capacitor for supply stability. The g-Select pin should be tied high or low through a 100 kΩ resistor - do not leave it floating. For accurate measurements, keep the PCB layout symmetrical around the sensor axes and avoid placing heat-generating components directly above the package. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
드롭인 대체품: MMA6270QT — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MMA6270QT (동일 폼 팩터 및 풋프린트) — 차이점: Acceleration Range, Operating Temperature, Output Type, Package, RoHS Status.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
MMA6260Q
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MMA6233Q
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MMA6270QT 최대 정격 & 전기적 특성
| 센서 유형 | Accelerometer, X/Y dual-axis |
| Sensing Axis | X, Y |
| Acceleration Range | ±1.5g, ±2g, ±4g, ±6g (g-Select) |
| Bandwidth | 350 Hz (1-pole low-pass filter) |
| 출력 유형 | Analog, ratiometric voltage |
| 공급 전압 | 2.2 V to 3.6 V |
| Sensitivity | Selectable per g-range (ratiometric to VDD) |
| 동작 온도 | -40 °C to +105 °C |
| 패키지 | 16-QFN (6x6 mm), HQCCN |
| 실장 유형 | Surface Mount |
| g-Select Input | Logic pin: 1.5g/2g/4g/6g range selection |
| Self-Test | Yes (electrostatic force on proof mass) |
| Temperature Compensation | Integrated |
| RoHS 상태 | Compliant |
| Lead Free | Yes |
MMA6270QT 핀 구성
| 핀 1 | VDD — Power supply (2.2 V to 3.6 V) |
| 핀 2 | GND — Ground |
| 핀 3 | XOUT — X-axis analog output (ratiometric to VDD) |
| 핀 4 | YOUT — Y-axis analog output (ratiometric to VDD) |
| 핀 5 | g-Select0 — Range select logic input bit 0 |
| 핀 6 | g-Select1 — Range select logic input bit 1 |
| 핀 7 | ST — Self-test input |
| 핀 8 | NC — Not connected (per datasheet) |
| 핀 9 | NC — Not connected (per datasheet) |
| 핀 10 | NC — Not connected (per datasheet) |
| 핀 11 | NC — Not connected (per datasheet) |
| 핀 12 | NC — Not connected (per datasheet) |
| 핀 13 | NC — Not connected (per datasheet) |
| 핀 14 | NC — Not connected (per datasheet) |
| 핀 15 | NC — Not connected (per datasheet) |
| 핀 16 | EP — Exposed thermal pad - tie to GND |
일반적인 애플리케이션
MMA6270QT 적합 용도: 6 애플리케이션s: Tilt Sensing in Appliances and White Goods, Freefall Detection for HDD Protection, Motion-Activated User Interfaces, Vibration Monitoring in Industrial Equipment, Orientation Sensing in Portable Electronics, Gaming and Virtual Pointer Events.
Tilt Sensing in Appliances and White Goods
The MMA6270QT is well suited to tilt sensing in washing machines, refrigerators, and other white goods where reliable ±1.5g to ±6g detection is required. Its g-Select input allows one BOM line to cover multiple product variants with different tilt thresholds, and the integrated temperature compensation keeps zero-g offset stable across the -40 °C to +105 °C operating range. Placed on the appliance control board with its X or Y axis aligned to the tilt direction, the analog ratiometric output feeds a host MCU ADC channel directly, eliminating an external op-amp. Compared with discrete tilt switches, the MMA6270QT delivers a proportional angle measurement that supports smooth UI feedback rather than binary on/off behavior.
추천
Freefall Detection for HDD Protection
Freefall detection in laptop and portable-storage hard-disk drives requires an accelerometer with low noise, sub-100 ms response, and reliable ±2g to ±6g range - all satisfied by the MMA6270QT. The 350 Hz analog bandwidth exceeds the typical 100-200 Hz freefall signal content, giving the HDD controller enough time to park the head before impact. The ratiometric analog output interfaces directly to the HDD controller's ADC, and the integrated self-test verifies sensor integrity at power-up - critical for a mission-critical data integrity item. For designers migrating to newer packages, the MMA845x digital family offers I2C/SPI but requires a footprint change.
추천
Motion-Activated User Interfaces
Motion-activated UI in remote controls, gaming peripherals, and wearable devices benefits from the MMA6270QT's selectable sensitivity and low supply current. Designers can use g-Select to switch from ±1.5g (fine gesture detection) to ±6g (shock detection) on the fly, supporting both subtle taps and vigorous swings in the same product. The ratiometric analog output allows the host MCU to wake on a programmable threshold using its ADC comparator, eliminating a dedicated motion-interrupt pin. Compared with digital accelerometers that require continuous polling, the MMA6270QT's analog output keeps power consumption bounded by the MCU's ADC sampling rate.
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Vibration Monitoring in Industrial Equipment
Industrial vibration monitoring on pumps, motors, and fans benefits from the MMA6270QT's 350 Hz bandwidth, which covers most rotating-equipment vibration signatures up to several thousand RPM. The analog output can be sampled by an industrial MCU's ADC at 1 kHz or higher to extract RMS and peak vibration levels for predictive maintenance. The integrated temperature compensation maintains accuracy across -40 °C to +105 °C factory-floor conditions, and the 16-QFN package withstands typical industrial shock and vibration when soldered to a proper PCB land pattern. Designers migrating to digital accelerometers can retain the same analog signal chain by adding an external ADC.
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Orientation Sensing in Portable Electronics
The MMA6270QT's X and Y axes map directly to portrait/landscape detection in e-readers, tablets, and handheld instruments. The ±1.5g range provides 1.5x headroom over Earth's gravity, allowing accurate tilt angle calculation across the full ±90° rotation envelope. The 350 Hz bandwidth tracks fast reorientation events (such as a user snapping a tablet into position) without aliasing artifacts, and the analog ratiometric output means orientation decisions can be made by a simple MCU ADC threshold comparison - no DSP required. The exposed thermal pad on the 16-QFN aids mechanical stability when the device is surface-mounted on a flexible PCB section.
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Gaming and Virtual Pointer Events
Low-cost gaming controllers and virtual pointers use the MMA6270QT to translate hand tilt and motion into cursor movement. The ±4g or ±6g range (selected via g-Select) gives enough headroom for vigorous game gestures while the ±1.5g range supports fine pointer control. The 350 Hz analog bandwidth comfortably exceeds the 60-120 Hz update rate typical of wireless game controllers, and the ratiometric output drives a host MCU's ADC without an op-amp stage. For battery-powered controllers, the sub-1 mA supply current preserves runtime, and the self-test pin validates sensor integrity at every power-on.
추천
추천 제품 요약
엔지니어링 참조 데이터: MMA6270QT — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MMA6260Q | MMA6233Q |
|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 16-QFN (6x6 mm) | 16-QFN (6x6 mm) - same | 16-QFN (6x6 mm) - same |
| Acceleration Range | ±1.5g, ±2g, ±4g, ±6g (g-Select) | ±1.5g fixed | ±2g, ±4g, ±6g (g-Select) |
| Number of Axes | 2 (X, Y) | 2 (X, Y) | 2 (X, Y) |
| Output Type | Analog ratiometric | Analog ratiometric | Analog ratiometric |
| Supply Voltage | 2.2 V to 3.6 V | 2.2 V to 3.6 V | 2.2 V to 3.6 V |
| Self-Test | Yes | Yes | Yes |
주요 차별점
- Selectable full-scale range via g-Select logic pins (vs MMA6260Q)
- Larger range coverage than fixed-1.5g siblings (vs MMA6260Q)
- Wider full-scale range envelope than the MMA6233Q (vs MMA6233Q)
설계 노트
Place a 0.1 µF ceramic decoupling capacitor within 3 mm of the VDD pin and a 10 µF bulk capacitor on the same supply trace, both referenced to the exposed thermal pad ground. The exposed pad on the 16-QFN MUST be soldered to a contiguous ground pour of at least 10 mm² to provide mechanical stability and a thermal path - skipping this pad causes temperature-drift and offset shifts. Avoid routing high-current digital traces under or directly above the package, as capacitive coupling can inject noise into the analog outputs.
Route the XOUT and YOUT analog traces as differential pairs with grounded guard traces on both sides, keeping them short and away from switching regulators or digital clocks. The g-Select logic pins must be tied high or low through a 100 kΩ resistor; leaving g-Select floating produces undefined full-scale range and invalid readings. Maintain symmetric PCB copper balance around both mechanical axes to keep zero-g offset within datasheet tolerance.
Do not apply reverse voltage to VDD - the MMA6270QT has no internal protection diode and reverse polarity will permanently damage the device. The self-test pin should be pulsed low briefly during power-up validation, not held low continuously, because continuous activation biases the proof mass and skews readings. Avoid mechanical stress on the package - the silicon die is sensitive to PCB flexure above 1-2 mm bend radius, which manifests as offset shifts.
규정 준수 정보
RoHS compliant and lead-free per NXP product page. REACH SVHC and halogen-free status not specified on the verified web data - contact NXP for the latest declaration.
