ماژول شتاب سنج CJMCU MMA8452 بر اساس آی سی سنجش شتاب MMA8452 ساخته شده و از محصولات شرکت CJMCU است. این ماژول برای اندازه گیری شتاب در محدوده قابل انتخاب ±2 g/±4 g/±8 g مناسب است و از طریق پروتکل I2C با سایر میکروکنترلرها ارتباط برقرار می کند و برای تشخیص حرکت اجسام و یا صفحات الکترونیکی در جهت افقی یا عمودی و تشخیص Freefall به کار می رود.
Description:
The MMA8452Q is a smart, low-power, three-axis, capacitive, micromachined accelerometer with 12 bits of resolution. This accelerometer is packed with embedded functions with flexible user programmable options, configurable to two interrupt pins. Embedded interrupt functions allow for overall power savings relieving the host processor from continuously polling data.
The MMA8452Q has user selectable full scales of ±2 g/±4 g/±8 g with high-pass filtered data as well as non-filtered data available real-time. The device can be configured to generate inertial wakeup interrupt signals from any combination of the configurable embedded functions allowing the MMA8452Q to monitor events and remain in a low-power mode during periods of inactivity. The MMA8452Q is available in a 16-pin QFN, 3 mm x 3 mm x 1 mm package.
Application:
E-compass applications
Static orientation detection (portrait/landscape, up/down, left/right, back/front position identification)
Notebook, e-reader, and laptop tumble and freefall detection
Real-time orientation detection (virtual reality and gaming 3D user position feedback)
Real-time activity analysis (pedometer step counting, freefall drop detection for HDD, dead-reckoning GPS backup)
Motion detection for portable product power saving (auto-sleep and auto-wake for cell phone, PDA, GPS, gaming)
Shock and vibration monitoring (mechatronic compensation, shipping and warranty usage logging)
User interface (menu scrolling by orientation change, pulse detection for button replacement)
Features:
1.95 V ~ 3.6 V supply voltage
1.6 V ~ 3.6 V interface voltage
±2 g/±4 g/±8 g dynamically selectable full-scale
Output data rates (ODR) from 1.56 Hz to 800 Hz
99 μg/√Hz noise
12-bit and 8-bit digital output
I2C digital output interface
Two programmable interrupt pins for six interrupt sources
Three embedded channels of motion detection
Freefall or motion detection: one channel
Pulse detection: one channel
Transient detection: one channel
Orientation (portrait/landscape) detection with set hysteresis
Automatic ODR change for auto-wake and return to sleep
High-pass filter data available real-time
Self-test
Current consumption: 6 μA to 165 μA