Bosch Sensortec

BMA421

Accelerometer

The ultra-small, triaxial BMA421 is a low-g acceleration sensor with digital interfaces. The accelerometer is ideally suited for low-power consumer market applications such as user interaction, gesture recognition or advanced power management for mobile devices. The BMA421 accelerometer is able to detect any-motion/no-motion. The acceleration sensor enables plug ’n’ play step counting and is optimized to fulfill the according low-power requirements in smart phones and wearable devices.

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
±100 mg
Parameter
Noise density (typ.)
Technical data
300 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.