Description:

FXLS8971CF 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 as well as good performance over 

temperature. 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.FXLS8971CF is available in a 3 mm x 3 mm x 1.25 mm 12-pin QFN package with 0.65 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 FXLS8971CF an ideal accelerometer for motion and position sensing in the industrial and medical IoT market segments.

Features:

• ±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 typical 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

• Post-board mount zero-g offset and TCO performance of ±30 mg (typ) and ±0.15 mg/°C (typ), respectively

• Selectable ODRs from 0.78 to 3200 Hz in both low-power and high-performance modes

• Flexible performance mode allowing 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)

• Self-governed 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, robust self-test diagnostic: Device motion or orientation does not impact the result.

Applications:

Industrial IOT

• Asset tracking

• Equipment monitoring

• Smart metering / tamper detection

• Tilt measurement, orientation detection, vibration sensing

• Surveillance

• Point of sale devices

• Indoor localization

Medical

• Patient activity monitors

• Drug delivery

• Clinical care

• Smart inhalers

Consumer devices

• Connected home

• Wearables

• Portable electronics

• Tilt sensing

• Mobile accessories