EmbeddedRelated.com
The 2026 Embedded Online Conference
    Parts   Sensors  IMU & Accelerometers    BMA400
BMA400

BMA400

Bosch Sensortec
Acceleration Sensor Modules Ultra-low Power, Triaxial Acceleration Sensor
54,103 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The Bosch Sensortec BMA400 is an ultra-low power, triaxial digital acceleration sensor designed for always-on applications. It integrates smart on-chip motion and position-triggered interrupt features, making it suitable for battery-powered devices. The sensor offers a programmable functionality with a 12-bit resolution and configurable acceleration ranges.

Why Choose This Part

The BMA400 excels in power-constrained designs with its ultra-low current consumption, allowing for extended battery life. Its integrated FIFO and smart interrupt features offload the host microcontroller, reducing system power and complexity. The compact 2x2x0.95mm LGA package enables deployment in space-constrained products.

Applications

Wearable Devices
Its low power consumption (14.5uA in run mode) and small 2x2x0.95mm package make it ideal for activity tracking, step counting, and orientation detection in smartwatches, fitness trackers, and hearables.
IoT Edge Nodes
The BMA400 can be used in battery-operated IoT sensor nodes for asset tracking, condition monitoring, and smart home applications, leveraging its auto-low power and auto-wakeup features to conserve energy.
Smart Home and Building Automation
For applications requiring motion detection, orientation sensing, or tamper detection in smart door locks, windows, or security sensors, the BMA400 offers integrated interrupt features and low power operation.
Activity Monitoring in Medical Devices
Its ability to detect walking, running, and standing still, combined with low power, suits it for portable medical devices that monitor patient activity or posture.

Key Specifications

Axis X, Y, Z
Type Digital
Features Selectable Low Pass Filter
Bandwidth 3Hz ~ 384Hz
Output Type I2C, SPI
Mounting Type Surface Mount
Package / Case 12-VFLGA Module
Voltage - Supply 1.71V ~ 3.6V
Acceleration Range +/-2g, 4g, 8g, 16g
Sensitivity (LSB/g) 1024 (+/-2g) ~ 128 (+/-16g)
Operating Temperature -40degC ~ 85degC
Supplier Device Package 12-LGA (2x2)

Getting Started

Bosch Sensortec provides development kits and evaluation boards for the BMA400, often compatible with common microcontroller platforms. Engineers can utilize the provided drivers and application examples to integrate the sensor via its I2C or SPI interface. A comprehensive datasheet and application notes detail the register settings and interrupt configurations.

BMA400 Family

Also available as: BMA400TR

Also Consider

ADXL345 ADIAnalog Devices Inc. - The ADXL345 is a common digital accelerometer, offering good performance and a well-established ecosystem for various projects.

Categories

Sensors > IMU & Accelerometers
The 2026 Embedded Online Conference