BMA400

3-axes ultra-low power accelerometer

The BMA400 is a 3-axes ultra-low power accelerometer from Bosch Sensortec (implied by document number BST-BMA400-DS000-02). View the full BMA400 datasheet below including key specifications, absolute maximum ratings.

Manufacturer

Bosch Sensortec (implied by document number BST-BMA400-DS000-02)

Key Specifications

Parameter	Value
On Chip Fifo Size	1 KB
Package Dimensions	2mm x 2mm x 0.95mm
Acceleration Ranges	±2g/±4g/±8g/±16g
Communication Interfaces	SPI (4-wire, 3-wire), I²C
Supply Voltage Io Domain	1.2V to 3.6V
Low Pass Filter Bandwidth	0.24ODR to 0.48ODR
Operating Temperature Range	-40°C to +85°C
Operating Current Sleep Mode	160 nA
Output Data Rate Normal Mode	12.5 Hz to 800 Hz
Output Data Rate Low Power Mode	25 Hz
Supply Voltage Internal Domains	1.72V to 3.6V
Operating Current Low Power Mode	850 nA
Operating Current Normal Mode Low Performance	3.5 μA
Operating Current Normal Mode High Performance	14.5 μA

Overview

Part: BMA400

Type: 3-axes ultra-low power accelerometer

Description: 12-bit, digital, triaxial acceleration sensor with smart on-chip motion and position-triggered interrupt features, offering ultra-low power consumption (< 14.5 μA) and programmable acceleration ranges.

Operating Conditions:

Supply voltage: 1.2V to 3.6V (VDDIO)
Acceleration ranges: ±2g/±4g/±8g/±16g
Max output data rate: 800Hz

Key Specs:

Resolution: 12 bit
Current consumption (highest performance): < 14.5 μA
Current consumption (Step Counter): 4 μA
Acceleration ranges: ±2g/±4g/±8g/±16g
Max output data rate: 800 Hz
Low-pass filter bandwidths: 0.48*ODR
Integrated FIFO: 1 KB
VDDIO voltage range: 1.2V to 3.6V

Features:

Small LGA package (2mm x 2mm, 0.95 mm height, 12 pins)
Ultra-low power (< 14.5 μA with highest performance)
Programmable acceleration ranges (±2g/±4g/±8g/±16g)
Programmable low-pass filter bandwidths (0.48*ODR up to 800Hz)
Integrated 1 KB FIFO
On-chip interrupt features (Auto-low power/Auto wakeup, Activity/In-activity, Step Counter, Activity Recognition, Orientation detection, Tap/double tap)
Digital interface (SPI (4-wire, 3-wire), I²C, 2 interrupt pins)
RoHS compliant, halogen-free

Applications:

Step Counting with ultra-low current consumption for extensive battery lifetime
Advanced system power management for mobile applications and (smart) watches
Fitness applications / Activity Tracking
Tap / double tap sensing
Drop detection for warranty logging
Window/door measurements for climate control and alarm systems
IoT applications powered by coin cell driven batteries, requiring <1μA and auto-wakeup functionality

Package:

LGA (12 pins), 2mm x 2mm, 0.95 mm height

Features

Small package size

LGA package (12 pins), footprint 2mm x 2mm, height 0.95 mm

Ultra-low power

Low current consumption of data acquisition without compromising on performance (< 14.5 μA with highest performance)

Programmable functionality

Acceleration ranges ±2g/±4g/±8g/±16g Low-pass filter bandwidths = 0.48*ODR up to a max. output data read out of 800Hz

On-chip FIFO

Integrated FIFO on sensor with 1 KB

On-chip interrupt features

Auto-low power/Auto wakeup Activity/In-activity Step Counter (overall device current consumption 4μA) Activity Recognition (Walking, Running, Standing still) Orientation detection Tap/double tap

Digital interface

SPI (4-wire, 3-wire), I²C, 2 interrupt pins

VDDIO voltage range: 1.2V to 3.6V

RoHS compliant, halogen-free

Applications

Step Counting with ultra-low current consumption for extensive battery lifetime
Advanced system power management for mobile applications and (smart) watches
Fitness applications / Activity Tracking
Tap / double tap sensing
Drop detection for warranty logging
Window/door measurements for climate control and alarm systems
IoT applications powered by coin cell driven batteries, requiring <1μA and auto-wakeup functionality

Absolute Maximum Ratings

Absolute maximum ratings

Parameter	Condition	Min	Max	Units
Voltage at Supply Pin	V DD Pin	-0.3	3.6	V
Voltage at Supply Pin	V DDIO Pin	-0.3	3.6	V
Voltage at any Logic Pin	Non-Supply Pin	-0.3	V DDIO +0.3, <4	V
Passive Storage Temp. Range	≤ 65% rel. H.	-50	+150	°C
Mechanical Shock	Duration ≤ 200μs		10,000	g
Mechanical Shock	Duration ≤ 1.0ms		2,000	g
Mechanical Shock	Free fall onto hard surfaces		1.8	m
ESD	HBM, at any Pin		2	kV
ESD	CDM		500	V
ESD	MM		200	V

Typical Application

Step Counting with ultra-low current consumption for extensive battery lifetime
Advanced system power management for mobile applications and (smart) watches
Fitness applications / Activity Tracking
Tap / double tap sensing
Drop detection for warranty logging
Window/door measurements for climate control and alarm systems
IoT applications powered by coin cell driven batteries, requiring <1μA and auto-wakeup functionality

Package Information

Ordering Information

MPN	Package	Temperature Range	Packing
BMA400	LGA-12 (2x2mm)	-40 to +85 °C	null

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