規格
| 屬性 | 價值 |
| Supplier | NXP USA Inc. |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Obsolete |
| Type | Digital |
| Axis | X, Y, Z |
| Acceleration Range | ±8g |
| Sensitivity(LSB / g) | 1024 |
| Bandwidth | 0.5Hz ~ 400Hz |
| Output Type | I²C |
| Voltage - Supply | 1.95V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
概述
Description
MMA8491QR1 is a Freescale/NXP 3‑axis MEMS accelerometer used to sense motion and tilt. It measures acceleration along X, Y, and Z axes and provides motion data to a host microcontroller. The device is designed for low power, compact applications and typically runs from a low-voltage supply (about 1.8–3.6 V) and uses a digital serial interface (I2C or SPI) to deliver data. Common applications include orientation sensing, gesture/step detection, and vibration monitoring in mobile devices, wearables, controllers, automotive, and industrial sensors. For exact figures (measurement ranges, data rates, package, and interface details) refer to the specific MMA8491QR1 datasheet.
Equivalent
Equivalent parts (3-axis digital MEMS accelerometers with I2C/SPI output):
- ST LIS3DH / LIS3DE
- Bosch BMA180 / BMA280
- Analog Devices ADXL345
- Kionix KX022 / KX134
These offer similar form factor and digital interfaces to the MMA8491QR1; select by range (±2/±4/±8 g), power, and package.
- ST LIS3DH / LIS3DE
- Bosch BMA180 / BMA280
- Analog Devices ADXL345
- Kionix KX022 / KX134
These offer similar form factor and digital interfaces to the MMA8491QR1; select by range (±2/±4/±8 g), power, and package.
Features
Here are the typical features of the MMA8491QR1:
- 3-axis MEMS accelerometer
- Analog voltage outputs for X, Y and Z axes
- Fully integrated device with no external components required
- Single-supply operation
- Low power consumption
- Small, compact package (QFN) with RoHS-compliant, lead-free construction
- Wide operating temperature range
- Factory-calibrated for offset and sensitivity (bias stability)
- Suitable for tilt, vibration, motion, and impact/shock sensing
- Applications in consumer electronics, automotive, and industrial sensing
- 3-axis MEMS accelerometer
- Analog voltage outputs for X, Y and Z axes
- Fully integrated device with no external components required
- Single-supply operation
- Low power consumption
- Small, compact package (QFN) with RoHS-compliant, lead-free construction
- Wide operating temperature range
- Factory-calibrated for offset and sensitivity (bias stability)
- Suitable for tilt, vibration, motion, and impact/shock sensing
- Applications in consumer electronics, automotive, and industrial sensing
Pinout
Pin count: 8 pins (8-pin package).
Function: 3-axis MEMS accelerometer with analog voltage outputs for X, Y, and Z axes (three analog outputs proportional to acceleration).
Function: 3-axis MEMS accelerometer with analog voltage outputs for X, Y, and Z axes (three analog outputs proportional to acceleration).
Manufacturer
The MMA8491QR1 is manufactured by NXP Semiconductors (the former Freescale Semiconductor; Freescale originated as Motorola’s semiconductor division). NXP is a Dutch multinational semiconductor company that designs and manufactures integrated circuits and solutions for automotive, industrial, and consumer electronics.
Application
Application areas of MMA8491QR1:
- Consumer electronics/mobile devices for screen orientation and motion-triggered UI; gesture sensing in remotes/controllers.
- Wearables/fitness devices for activity recognition and step counting.
- Gaming peripherals for motion control.
- Automotive/transport for tilt/impact sensing and vehicle dynamics.
- Industrial/IoT for vibration monitoring, asset condition sensing and machine health.
- Security/smart-home for tamper and vibration alarms.
- Datalogging and education/prototyping in labs and hobby projects.
- Consumer electronics/mobile devices for screen orientation and motion-triggered UI; gesture sensing in remotes/controllers.
- Wearables/fitness devices for activity recognition and step counting.
- Gaming peripherals for motion control.
- Automotive/transport for tilt/impact sensing and vehicle dynamics.
- Industrial/IoT for vibration monitoring, asset condition sensing and machine health.
- Security/smart-home for tamper and vibration alarms.
- Datalogging and education/prototyping in labs and hobby projects.
Package
QFN-16 package (16-pin, 3×3 mm).
