FXOS8700CQR1 Description

The FXOS8700CQ is a compact, low-power combination of a 3-axis linear accelerometer and 3-axis magnetometer. The device includes smart-embedded functionality and a selectable I2C or point-to-point SPI serial interface with an ADC resolution of 14 bits for the magnetometer and 16 bits for the accelerometer. The FXOS8700CQ features a fixed magnetic measurement range of 1200 T and dynamically configurable acceleration full-scale ranges of 2 g, 4 g, and 8 g. Users can choose output data rates (ODR) for each sensor between 1.563 Hz and 800 Hz. At ODR rates up to 400 Hz, interleaved magnetic and acceleration data is provided. The plastic QFN packaging of the FXOS8700CQ is available, and it is warranted to function across a temperature range of -40 °C to +85 °C.

FXOS8700CQR1 Features

Complete 6-axis, e-compass hardware solution

1.95 V to 3.6 V VDD supply voltage, 1.62 V to 3.6 V VDDIO voltage

±2 g/±4 g/±8 g dynamically selectable acceleration full-scale range

±1200 µT magnetic sensor full-scale range

Output data rates (ODR) from 1.563 Hz to 800 Hz for each sensor, and up to 400 Hz when operated in hybrid mode with both sensors active

Low noise: < 126 μg/√Hz acceleration noise density at 200-Hz bandwidth, < 100 nT/√Hz magnetic noise density at 100-Hz bandwidth

14-bit ADC resolution for acceleration measurements

16-bit ADC resolution for magnetic measurements

 Low power: 240 μA current consumption at 100 Hz, and 80 μA at 25 Hz with both sensors active

Embedded programmable acceleration event functions

Freefall and motion detection

Transient detection

Vector-magnitude change detection

Pulse and tap detection (single and double)

Orientation detection (portrait/landscape)

Embedded programmable magnetic event functions

Threshold detection

Vector-magnitude change detection

Autonomous magnetic min/max detection

Autonomous hard-iron calibration

FXOS8700CQR1 Applications

Security: motion detection, door opening, smart home applications, robotics, and unmanned aerial vehicles (UAVs) with electronic compass (e-compass) function.

Medical applications: patient monitoring, fall detection, and rehabilitation

E-compass in mobile devices, tablets, and personal navigation devices

User interface (menu scrolling by orientation change, tap detection for button replacement)

Orientation detection (portrait/landscape: up/down, left/right, back/front orientation identification)

Augmented reality (AR), gaming, and real-time activity analysis (pedometry, freefall, and drop detection for hard disk drives and other devices)

Power management for mobile devices using inertial and magnetic event detection

Wearable devices: motion detection, activity monitoring, sports monitoring, context awareness, and shock and vibration monitoring (mechatronic compensation, shipping, and warranty usage logging)