General description
FXLS8974CF is a compact 3-axis MEMS accelerometer designed for use in a wide
range of industrial and medical IOT applications that require ultra-low-power wake-up
on motion. The part supports both high-performance and low-power operating modes,
allowing maximum flexibility to meet the resolution and power needs for various unique
use cases. A number of advanced, integrated digital features enable designers to reduce
the overall system power consumption and simplify host data collection.
FXLS8974CF is available in a 2 mm x 2 mm x 0.95 mm 10-pin DFN package with 0.4
mm pitch and wettable flanks. The device is qualified to industrial standards over the
extended –40 °C to +105 °C temperature range. The combination of sensor performance,
system power-saving features, and extended over-temperature-range performance
makes FXLS8974CF an ideal accelerometer for motion sensing in the IOT.

Features and benefits
• ±2/4/8/16 g user-selectable, full-scale measurement ranges
• 12-bit acceleration data
• 8-bit temperature sensor data
• Low noise: 230 μg/√Hz in high performance mode
• Low-power capability:
– ≤ 1 μA IDD for ODRs up to 6.25 Hz
– < 4 μA IDD for ODRs up to 50 Hz
• Selectable ODRs up to 3200 Hz; Flexible Performance mode allows for custom ODRs
with programmable decimation (resolution) and idle-time settings
• 144 byte output data buffer (FIFO/LIFO) capable of storing up to 32 12-bit X/Y/Z data
triplets
• Flexible Sensor Data Change Detection (SDCD) function for realizing motion or no
motion, high-g/low-g, freefall, and other inertial events
• Autonomous orientation detection function (Portrait/Landscape/Up/Down)
• Dedicated low-power motion-detection mode with one wire interface option
• 12-bit vector magnitude calculation
• Trigger input for synchronizing data collection with an external system
• I2C interface frequencies up to 1 MHz; 3- and 4-wire SPI interface with clock
frequencies up to 4 MHz
• Bidirectional self-test diagnostic: Device motion or orientation does not impact the
result.

Applications
3.1 Industrial IOT
• Asset tracking
• Equipment monitoring
• Smart metering / tamper detection
• Surveillance
• Point of sale devices
• Indoor localization
3.2 Medical
• Patient activity monitors
• Drug delivery
• Clinical care
• Smart inhalers
3.3 Consumer devices
• Connected home
• Wearables
• Portable electronics
• Mobile accessories