CJMCU-400 BMA400 Tri-Axis Accelerometer Wearable Equipment with Low Power Consumption
Description: The BMA400 is the first real ultra-low power acceleration sensor without compromising on performance. Featuring 12-bit digital resolution, continuous measurement and a defined selectable bandwidth combined with ultra-low power the BMA400 allows low-noise measurement of accelerations in three perpendicular axes. The BMA400 thus senses tilt, orientation, tab/double tab, and enables plug 'n' play step counting with activity recognition especially suited for wearable devices, which need long-lasting battery life. Thanks to the continuous measurement principle and always-defined bandwidth, the BMA400 is the ideal solution for smart home applications such as smart indoor climate systems and smart home security systems. In the latter, the BMA400 can distinguish between real alarm situations like broken glass and false signals coming from random vibrations. Thereby, the new acceleration sensor avoids false alarms. BMA400 Target Applications: IoT and smart home applications (e.g. indoor climate systems, security systems) Activity tracking and step counting in wearable devices (e.g. fitness bands, smart and regular watches, wearables) Industrial applications (e.g. predictive maintenance, package tracking) Power management of consumer end-devices based on motion Feature: With its embedded features, the BMA400 is unique in the class of ultra-low current accelerometers for wearable devices, smart home- and Internet of Things applications. The embedded step counter and activity recognition enable low current step-counting and activity tracking at only 4 A overall current consumption. The plug and play step counter is optimized for wrist band usage and can also be used in other wearable devices. On top, the BMA400 integrates a multitude of other features (e.g. activity change, orientation, tab/double tab, etc.) that facilitate its use especially in wearable devices and increase battery life significantly. Featuring continuous measurement and low pass filters in all power/noise configurations down to 3.2 A, the BMA400 is robust to vibrations and aliasing. In an additional ultra-low power mode the current consumption can be reduced even further, down to 800 nA. This mode offers an auto wake-up function to switch the sensor into any normal mode configuration when the precise measurement is required. In addition, an auto ultra-low power feature is available to switch the sensor into its lowest current consumption configuration, when simple motion monitoring is needed. The BMA400 is highly configurable in terms of current consumption and noise performance in order to give the designer full flexibility when integrating the sensor into an always-on low power system. The integrated features enable the sensor to be used as a main part of a power management unit. BMA400 Technical data Measurement range 2 g, 4 g, 8 g, 16 g Digital resolution 12 bit Output Data Rate (ODR) 12.5 Hz to 800 Hz Low path filter bandwidth Selectable 0.48xODR or 0.24xODR Current consumption (independent from ODR due to continuous measurement) Max. performance: 14 A Typical use case:
