MMA7260QT - ±1.5/2/4/6g 3-Axis MEMS Accelerometer | NXP
料号： MMA7260QT ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.95 | $5.95 |
| 10 | $5.2 | $52.00 |
| 100 | $4.45 | $445.00 |
| 500 | $3.8 | $1,900.00 |
| 1,000 | $3.25 | $3,250.00 |
MMA7260QT 概述
An accelerometer is a MEMS (micro-electromechanical systems) sensor that measures proper acceleration along one or more axes. Capacitive micromachined accelerometers use a suspended proof structure whose capacitance changes with deflection; on-board ASIC converts this change to an analog or digital output proportional to g-force. The MMA7260QT belongs to the broader category of inertial sensors (accelerometer -> MEMS motion sensor -> inertial measurement unit -> semiconductor sensor), and is one of the early sub-1g-noise floor/low-g consumer accelerometers that made tilt-based UI and HDD free-fall detection practical in volume products.
Key features include four selectable sensitivities (800 mV/g at 1.5g, 600 mV/g at 2g, 300 mV/g at 4g, and 200 mV/g at 6g), an analog ratiometric output, 1-pole low-pass filter with selectable bandwidth, low 0.95 mA typical supply current, sleep mode under 3 µA, fast power-on response, and self-test capability. The g-Select inputs (g-SEL1, g-SEL2) allow dynamic switching between two preset ranges. The QFN-16 package is small (6 mm x 6 mm) and supports hand or reflow soldering.
The MMA7260QT employs a surface-micromachined capacitor structure with an ASIC that includes a charge amplifier, temperature-compensation network, low-pass filter, and g-Select decoding. The 1.5 g internal sensor noise floor is approximately 350 µg/√Hz. Self-test verifies mechanical and electrical integrity via electrostatic deflection of the proof mass. The device operates from a 2.2 V to 3.6 V analog supply and supports 3.3V or 5V digital logic when paired with a level shifter.
Typical applications include HDD free-fall protection, tilt and orientation sensing, motion-activated user interfaces, vibration analysis in industrial equipment, 3-axis gaming controllers, and robotics tilt feedback. Its selectable sensitivity makes it suitable both for high-resolution 1.5g tilt sensing and broader-range shock detection.
When designing with this part, use low-ESR decoupling on VDD, place the device away from vibration sources (speakers, fans) and keep the g-Select lines tied to known logic levels to avoid transient range changes. Pololu and other module vendors pair this IC with an on-board 3.3V regulator to ease 5V host integration. The part is reported as obsolete/EOL by multiple distributors as of 2026-10-15; new designs should consider the recommended drop-in successors MMA7331L/MMA7361L/MMA7455L/MMA8451Q/MMA8452Q/MMA8453Q where pin-compatibility allows.
This page synthesizes distributor stock and lifecycle data, parametric alternatives, and application context not aggregated in a single manufacturer document.
直接替换替代料： MMA7260QT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MMA7260QT （相同外形与封装尺寸） ——差异在于 Output Type, Package, Sensor Type, RoHS Status, Acceleration Range.
快速对比工具——选择替代料号进行并排对比：
MMA7260Q
✅ 直接替换✓ 有现货
$4.75 / 个
查看数据手册 →MMA7261QT
✅ 直接替换📋 参考替代料（不在目录中）
MMA7361L
✅ 直接替换📋 参考替代料（不在目录中）
MMA7331L
✅ 直接替换📋 参考替代料（不在目录中）
MMA7455L
✅ 直接替换📋 参考替代料（不在目录中）
MMA7260QT 最大额定值与电气特性
| 传感器类型 | 3-axis capacitive micromachined accelerometer (MEMS) |
| Acceleration Range (selectable) | ±1.5g / ±2g / ±4g / ±6g (g-Select) |
| Sensitivity @ 1.5g | 800 mV/g (typical, at VDD = 3.3 V) |
| Sensitivity @ 2g | 600 mV/g (typical) |
| Sensitivity @ 4g | 300 mV/g (typical) |
| Sensitivity @ 6g | 200 mV/g (typical) |
| 输出类型 | Analog, ratiometric to VDD |
| Supply Voltage (VDD) | 2.2 V to 3.6 V |
| Supply Current (active, typical) | 0.95 mA |
| Sleep Mode Current | < 3 µA |
| Bandwidth | 1-pole low-pass filter, configurable via external capacitor |
| g-Select Inputs | 2 (g-SEL1, g-SEL2) |
| Self-Test | Yes (ST pin) |
| Zero-g Offset (initial) | ±1.0 g max (ratiometric) |
| 工作温度 | -20 °C to +85 °C |
| 封装 | QFN-16 (HQCCN), 6 mm x 6 mm |
| 安装类型 | Surface Mount |
| RoHS 状态 | RoHS Compliant (per DigiChip) |
| Lead Status | Contains Lead (per DigiChip listing) |
MMA7260QT 引脚配置
| 引脚 1 | NC — Not connected (per datasheet) |
| 引脚 2 | NC — Not connected (per datasheet) |
| 引脚 3 | NC — Not connected (per datasheet) |
| 引脚 4 | g-SEL1 — g-Select input 1 (range selection, see datasheet logic table) |
| 引脚 5 | g-SEL2 — g-Select input 2 (range selection) |
| 引脚 6 | EN — Enable (active high, sleep mode when low) |
| 引脚 7 | VDD — Supply voltage 2.2 V to 3.6 V |
| 引脚 8 | GND — Ground |
| 引脚 9 | XOUT — X-axis analog output |
| 引脚 10 | YOUT — Y-axis analog output |
| 引脚 11 | ZOUT — Z-axis analog output |
| 引脚 12 | NC — Not connected (per datasheet) |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | ST — Self-test input (apply VLogic high to perform self-test) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | NC — Not connected (per datasheet) |
典型应用
MMA7260QT 适用于 6 应用s: HDD Free-Fall Detection, Tilt and Orientation Sensing, Motion-Activated User Interface, Vibration Analysis in Industrial Equipment, Robotics Tilt Feedback, Portable Activity and Step Monitors.
HDD Free-Fall Detection
The MMA7260QT is purpose-built for HDD free-fall protection in notebook computers, where the head must park within milliseconds of detecting a drop. Its ±1.5g range provides high-resolution tilt and modest acceleration detection, and the analog ratiometric output interfaces directly to the disk controller's ADC. Pololu and other module vendors still recommend this part for legacy HDD designs and educational projects, though digital successors like MMA8451Q are preferred for new designs. Power-on settling is fast enough to detect the first g-event after system boot.
推荐
Tilt and Orientation Sensing
The ±1.5g range with 800 mV/g sensitivity makes the MMA7260QT ideal for tilt-based user interfaces and orientation detection in handheld devices, e-readers, and industrial displays. The ratiometric analog output connects to a microcontroller ADC, where the 0g reading identifies level and deviation-from-level translates directly to tilt angle. Place the IC away from speakers and fans to avoid mechanical noise coupling; for high-precision tilt (under ±0.1°), apply software temperature compensation in firmware.
推荐
Motion-Activated User Interface
Consumer devices (TV remotes, game controllers, smart pens) use the MMA7260QT to wake on motion and recognize gestures. Its fast power-on and selectable g-Select ranges allow designers to switch from a low-g sensitivity mode (tap detection) to a higher-g mode (shake or throw detection). The 0.95 mA active current is acceptable for short-burst operation, and the <3 µA sleep current supports long battery standby. Modern alternatives like MMA8452Q add FIFO and tap-detection interrupts that simplify firmware.
推荐
Vibration Analysis in Industrial Equipment
In industrial machinery and predictive-maintenance systems, the MMA7260QT captures vibration signatures in the 0-1.5g band, allowing FFT analysis to detect bearing wear or imbalance. The 1-pole low-pass filter can be tuned with an external capacitor to limit aliasing, and the analog output drives an op-amp/ADC chain. For high-frequency vibration (>500 Hz), the MMA7361L or ADXL335 family offers better bandwidth. Expect a noise floor around 350 µg/√Hz on the MMA7260QT at sensitivity bands - adequate for slow-rotating machinery.
推荐
Robotics Tilt Feedback
Balance robots, two-wheeled vehicles, and self-balancing platforms use the MMA7260QT for real-time tilt feedback in control loops. The ±1.5g range offers fine angular resolution near horizontal, and the 1 kHz analog bandwidth is plenty for slow-control servo loops. Mount the sensor near the center of gravity with the Z axis vertical to minimize coupling. Hobbyists typically pair it with an MPU or microcontroller and run a complementary filter in firmware to combine accelerometer and gyroscope data.
推荐
Portable Activity and Step Monitors
Wearable fitness devices and medical step counters use the MMA7260QT for activity classification and step counting. Its selectable ±2g/±4g modes accommodate walking and running, while the ratiometric output is read by a low-power microcontroller ADC. Sleep mode under 3 µA keeps battery drain minimal between samples. Newer digital accelerometers (MMA8451Q, MMA8452Q) include built-in step-detection interrupts that offload this from the host MCU, but the MMA7260QT remains a workable choice when the host has spare cycles.
推荐
推荐产品汇总
工程参考数据： MMA7260QT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MMA7260Q | MMA7261QT | MMA7361L | MMA7331L | MMA7455L |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | QFN-16 (6x6 mm) | QFN-16 (6x6 mm) - same | QFN-16 (6x6 mm) - same | LGA-14 - DIFFERENT (PCB rework) | LGA-14 - DIFFERENT (PCB rework) | LGA-14 - DIFFERENT (PCB rework) |
| Acceleration Range | ±1.5/2/4/6g (4 ranges) | ±1.5/2/4/6g (4 ranges) - same | ±1.5/4/6g (3 ranges) | ±1.5/3/6g (3 ranges) | ±2/4/6g (3 ranges) | ±2/4/8g (3 ranges, digital) |
| Output Type | Analog ratiometric | Analog ratiometric | Analog ratiometric | Analog ratiometric | Analog ratiometric | Digital I2C/SPI - DIFFERENT |
| Supply Current (active) | 0.95 mA | 0.95 mA | 0.95 mA | 0.4 mA (lower) | 0.4 mA (lower) | 0.4 mA |
| Operating Temperature | -20 °C to +85 °C | -20 °C to +85 °C | -20 °C to +85 °C | -20 °C to +85 °C | -20 °C to +85 °C | -40 °C to +85 °C |
| Lifecycle Status (as of 2026-10-15) | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| RoHS Compliant | Yes (per DigiChip) | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Four selectable g-ranges via g-Select pins （对比 MMA7361L)
- QFN-16 package with 6x6 mm footprint （对比 MMA7361L (LGA-14))
- Analog ratiometric output (no firmware stack required) （对比 MMA7455L)
设计说明
Decouple VDD with a 0.1 µF ceramic capacitor placed as close as possible to the VDD pin (pin 7) and the GND pin (pin 8). Add a bulk 1 µF to 10 µF capacitor on the same rail if the supply is shared with switching regulators. The MMA7260QT draws 0.95 mA active and <3 µA in sleep; assert the EN pin low during sleep to extend battery life in portable applications.
Tie g-SEL1 and g-SEL2 to fixed logic levels (GND or VDD) using 100 kΩ resistors - never leave them floating, as a floating logic input can cause the device to select an unintended range. Verify with a multimeter that the logic levels settle within 100 µs of power-on to avoid range transients during startup.
Mount the MMA7260QT on a rigid section of the PCB with the Z-axis (out of package) oriented vertically for typical tilt applications. Avoid mounting near speakers, fans, or PCB flexure points that can introduce vibration coupling. Use a continuous ground plane under and around the device to shield against EMI, and keep the analog X/Y/Z traces short and away from switching nodes (DC-DC, clock lines).
The MMA7260QT outputs are ratiometric to VDD - the zero-g output sits at VDD/2 (1.65 V at 3.3 V). Use a ratiometric ADC reference (also tied to VDD) so temperature and supply variations cancel out. Add a unity-gain buffer (e.g., MCP6002) on each output if the ADC input is more than 10 cm away, to prevent capacitive loading from distorting the analog signal.
合规信息
RoHS compliance per DigiChip datasheet listing; lead status reported as 'Contains Lead' by DigiChip. Reach and conflict-mineral declarations not in provided data. AEC-Q100 not applicable - this is a consumer/industrial sensor, not automotive-grade.
