Description: BMA220 3-axis I2C digital accelerator - DFRobot module
Sensor for measuring acceleration in three axes. It is characterized by small size, low energy consumption and simple use. It communicates via the I2C bus.
For communication with the central unit, the popular I2C bus (TWI) is used. The module has, necessary for the correct operation of the system, passive elements. Leads are popular goldpin connectors (in the set for self-soldering), for connecting the sensor via wires or for connecting directly to breadboard.
|
The product is compatible with Arduino Manufacturer prepared a libraryanduser's guidefor users ofArduino. |
Since the maximum voltage, with which the system works is 3.6 V, to work with Arduinoneeded is a voltage converter. The exceptions are the modules operating with voltages of 3.3 V, for example,Arduino Pro Mini 328 - 3.3 V/8 MHz.
Pins
The sensor has five pins for mounting the goldpin connectors - 2.54 mm pitch (not included).
| Name | Description |
|---|---|
| VCC | The module's supply voltage ranges from 2.0 V to 3.6 V. |
| GND | The ground of the system. |
| SCL | Clock line of the I2C bus (TWI). |
| SDA | The data line of the I2C bus (TWI). |
| INT | External interrupt output (details indocumentation). |
Resolution
Data about the resolution and sensitivity of the sensor are presented in the table below.
|
The registry range |
Range | Sensitivity | Resolution | Example of usage |
|---|---|---|---|---|
| 00 | ± 2 g | 16 LSB/g | 62.5 mg / LSB | Orientation recognition |
|
01 |
± 4 g | 8 LSB/g | 125 mg / LSB | Games |
|
10 |
± 8 g | 4 LSB/g | 250 mg / LSB | Games |
| 11 | ± 16 g | 2 LSB/g | 500 mg / LSB | Detection of vibration |
Specification of BMA220 3-axis I2C digital accelerator - DFRobot module
- Supply voltage: 2.0 V - 3.6 V
- The voltage of pins: 1,6 V to 3,6 V
- Low current consumption: up to 250 µA (up to 10 µA in standby mode)
- Three axes: X, Y, Z
- Communication interface: I2C (TWI)
- Does not contain pull-up resistors - pulling up the line of the I2C bus (details on the diagram)
- Resolution:details in the table
- Measuring range (configurable): ±2 g, ±4 g, ±8 g, ±16 g
- Programmable interrupt
- Pins:strap goldpin pitch of 2.54 - kit for self-soldering
- Two mounting holes with the diameter of 3 mm
- Board sizes: 22 x 13 mm
Useful links |
