Content
  • Product Description

    BMA421

    The BMA421 is an ultra-small, triaxial, low-g acceleration sensor with digital interfaces, aiming for low-power consumer electronics applications. Featuring 12 bit digital resolution and embedded intelligence, the BMA421 allows low-noise measurement of accelerations in 3 perpendicular axes and thus senses any-motion/no-motion and enables plug ’n’ play step counting in smart phones and wearable devices. Furthermore the device is optimized to fulfill low power step counter requirements.

    Applications

    - Step-counting in smartphones

    - Step-counting in wearable devices

    - Low power user interaction

    - Gesture recognition

    - Advanced power management for mobile devices

    - Tilt compensation for electronic compass

     
     

    Mobile Applications

    Would you like to check an altitude on a map and plan the the best route or check the local weather forecast for your next hike? Are you monitoring your daily sports acitivities with your smartphone? These and many more outdoor applications are enabled by MEMS sensors. These new and advanced devices will even help you to find your car in a public parking garage.

    discover the application

    watch the video

     
     



     

    Other sensors in the same category

     

    BMA423

    The BMA421 is an ultra-small, low-g acceleration sensor with 12 bit digital resolution for wearable devices.

    BMA455

    With its embedded intelligence BMA455 is unique in the class of consumer grade accelerometers for smartphones, wearable devices and toys and gadgets.

    BMA456

    The BMA456 is an ultra-small, low-g acceleration sensor with 16 bit digital resolution for wearable devices.

    BMA280

    The BMA280 is an advanced, triaxial, low-g acceleration sensor with digital interfaces, aiming for low-power consumer electronics applications. The sensor has a footprint of 2 x 2mm² and a 14 bit digital resolution.

     

    BMA253

    The ultra-small package of only 2 x 2mm² and the interfaces of the BMA253 have been defined to match a multitude of hardware requirements.

    BMA222E

    The BMA222E is an small acceleration sensor with a footprint of 2 x 2mm² and a 8 bit digital resolution.

    BMA250E

    The BMA250E with its 2 x 2 mm² footprint and a 10 bit digital resolution allows low-noise measurement of accelerations in 3 perpendicular axes.

    BMA255

    With its small footprint of only 2 x 2mm² the BMA255 is unique in the class of low-noise, 12 bit digital acceleration sensors.

     
     
  • Technical data
    Parameter Technical data
    Digital resolution 12 bit
    Resolution
    (in ±2g range)
    0.98 mg
    Measurement ranges
    (programmable)
    ±2 g, ±4 g, ±8 g, ±16 g
    Sensitivity (calibrated) ±2 g: 1024 LSB/g
    ±4 g: 512 LSB/g
    ±8 g: 256 LSB/g
    ±16 g: 128 LSB/g
    Zero-g offset (typ., over life-time) ±100 mg
    Noise density (typ.) 300 µg/vHz
    Bandwidths (programmable) 1600 Hz ... 1.5 Hz
    Digital inputs/outputs SPI & I2C,
    2x digital interrupt pins
    Supply voltage (VDD) 1.62 … 3.6 V
    I/0 supply voltage (VDDIO) 1.2 … 3.6 V
    Temperature range -40 … +85°C
    Current consumption
    - full operation
    - low-power mode
    150 μA
    13 μA (at 50Hz data rate)
    FIFO data buffer 1 kB
    LGA package 2 x 2 x 0.95 mm³
    Shock resistance 10,000 g x 200 µs
     
     
  • Downloads
    Type of document Download
    Flyer BST-BMA421-FL000
    Handling & Soldering instructions BST-MAS-HS000