Bosch Sensortec

BMA423

Accelerometer

The low-g acceleration sensor BMA423 is an ultra-small, triaxial accelerometer with digital interfaces, aiming for low-power consumer electronics applications. BMA423 is perfect for use cases such as advanced gesture recognition, activity recognition, activity tracking or advanced power management for mobile devices. The BMA423 senses wrist tilt, tab/double tab and enables plug ’n’ play step counting without an extra microcontroller. The accelerator can easily be used in modern, space-constrained wearables, such as fitness trackers, smartwatches and hearables.

Technical data

Parameter Technical data
Parameter
Digital resolution
Technical data
12 bit
Parameter
Resolution
(in ±2g range)
Technical data
0.98 mg
Parameter
Measurement ranges
(programmable)
Technical data
±2 g, ±4 g, ±8 g, ±16 g
Parameter
Sensitivity (calibrated)
Technical data
±2 g: 1024 LSB/g
±4 g: 512 LSB/g
±8 g: 256 LSB/g
±16 g: 128 LSB/g
Parameter
Zero-g offset (typ., over life-time)
Technical data
±80 mg
Parameter
Noise density (typ.)
Technical data
140 µg/vHz
Parameter
Bandwidths (programmable)
Technical data
1600 Hz ... 1.5 Hz
Parameter
Digital inputs/outputs
Technical data
SPI & I2C,
2x digital interrupt pins
Parameter
Supply voltage (VDD)
Technical data
1.62 … 3.6 V
Parameter
I/0 supply voltage (VDDIO)
Technical data
1.2 … 3.6 V
Parameter
Temperature range
Technical data
-40 … +85°C
Parameter
Current consumption
- full operation
- low-power mode
Technical data
150 μA
13 μA (at 50Hz data rate)
Parameter
FIFO data buffer
Technical data
1 kB
Parameter
LGA package
Technical data
2 x 2 x 0.95 mm³
Parameter
Shock resistance
Technical data
10,000 g x 200 µs

Documents

Software

Woman taking a picture of New York City

Smartphones & tablets

Did you know that you most likely have a Bosch MEMS sensor in your pocket? More than every second smartphone and tablet worldwide contains at least one of these tiny helpers. Bosch MEMS sensors stabilize images, detect gestures and activities, and count your steps.

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.