Bosch Sensortec

BMA400

Accelerometer

Bosch Sensortec´s triaxial BMA400 is the first real ultra-low power acceleration sensor. Accordingly, the BMA400 is especially suited for wearable devices, which need a long-lasting battery lifetime. Further, it is the ideal solution for smart home applications e.g. smart indoor climate systems and smart home security systems. By distinguishing between critical situations and false signals, the new acceleration sensor avoids false alarms.

Technical data

Parameter Technical data
Parameter
Measurement range
Technical data
±2 g, ±4 g, ±8 g, ±16 g
Parameter
Digital resolution
Technical data
12 bit
Parameter
Output data rate (ODR)
Technical data
12.5 Hz to 800 Hz
Parameter
Low path filter bandwidth
Technical data
Selectable 0.48xODR or 0.24xODR
Parameter
Current consumption (independent from ODR due to continuous measurement)
Technical data
Max. performance: 14.5 μA
Typical use case: 5.8 μA
Low power use case: 3.5μA
Parameter
Noise density
Technical data
Max. performance: 180 μg/√Hz (Z: x 1.45)
Typical use case: 300 μg/√Hz (Z: x 1.45)
Low power: 415 μg/√Hz (Z: x 1.45)
Parameter
Ultra low power / auto-wake-up mode
Technical data
800 nA @ 25 Hz ODR
Parameter
Embedded features
Technical data

  • Step counter (< 4 μA overall)

  • Activity recognition (walking, running, standing still)

  • Activity change

  • Orientation

  • Tab/double tab (< 8 μA overall)

  • General interrupt 1 and 2 (programmable via thresholds, timer, logical AND/OR operations)

  • 1 kB FIFO

Parameter
Offset
Technical data
±80 mg
Parameter
TCO
Technical data
±1 mg/K
Parameter
Interface
Technical data
SPI & I²C & 2 Interrupt pins
Parameter
Supply voltage
Technical data
1.71 V up to 3.6 V
Parameter
Package
Technical data
12 pin LGA 2x2x0.95 mm³

Documents

Software

 Woman and man chatting with each other while looking in the smartphone

Smart home

Imagine you get up on a cold day and the bathroom is heated the way you prefer it. When you leave home, sensor-activated intrusion detection gives you peace of mind during the day. Our sensing solutions enable many smart home applications, enhancing your well-being.

Woman doing sports using hearables and smartwatch

Wearables & hearables

Smartwatches, wristbands, smart clothes and hearables: whether supporting your fitness through calorie counting or helping you orient yourself through navigation, our accurate and ultra-low power sensing solutions turn a regular wearable into your daily companion!

Explore more

The BSEC software is only available for download after accepting the software license agreement:

BSEC license agreement

You will soon receive an e-mail with the download link.