Soldered Ultra-Low-Power Accelerometer BMA400 Breakout

This breakout carries the Bosch BMA400, a 12-bit 3-axis accelerometer made for battery-powered devices. Besides raw acceleration, the chip counts steps, detects taps, orientation and activity changes, and buffers samples in a 1 KB FIFO, so your microcontroller can sleep until an interrupt wakes it. It talks over I2C (a two-wire bus for talking to chips) and has two Qwiic connectors, so you can plug it in without soldering.

Soldered Ultra-Low-Power Accelerometer BMA400 Breakout

Top down

You pick a measurement range of ±2 g, ±4 g, ±8 g or ±16 g. In normal mode the output data rate goes from 12.5 Hz to 800 Hz. The BMA400 draws 14.5 µA in normal mode at its highest performance setting, 850 nA in low-power mode at 25 Hz with OSR=0 and 160 nA in sleep mode (datasheet typical values, nominal supply, 25 °C).

The board answers on I2C address 0x14, or 0x15 when you change the address jumper or pull the ADDR pin high. Two 4-pin 2.54 mm headers bring out power, I2C, ADDR, the two interrupt outputs INT1 and INT2, and CSB.

This documentation is for

ProductSoldered Ultra-Low-Power Accelerometer BMA400 BreakoutA Bosch BMA400 3-axis accelerometer breakout with ±2 g to ±16 g ranges, on-chip step counting and motion interrupts, I2C and two Qwiic connectors.SKU 333419

At a glance

InterfaceI2C, address 0x14 (default) or 0x15; INT1 and INT2 interrupt outputs

Main ICBosch BMA400, 12-bit, 3-axis

Range±2 g, ±4 g, ±8 g or ±16 g

Output data rate12.5 to 800 Hz (normal mode), 25 Hz (low-power mode)

Voltage1.72 to 3.6 V on 3V3, no on-board regulator

Current14.5 µA normal mode, 850 nA low-power mode (25 Hz, OSR=0), 160 nA sleep (typical)

Connectors2x Qwiic, 2x 4-pin 2.54 mm header

Dimensions22 x 22 mm, two 3.2 mm mounting holes

LibrariesArduino library, MicroPython library

What's in the box

Qty	Item	Notes
1	Soldered Ultra-Low-Power Accelerometer BMA400 Breakout (main product)	333419
1	Header pins (unsoldered)	Header pins included for all breadboard-compatible pins