Mikroelektronika d.o.o.
Tableau magnétique à 10 clics
Tableau magnétique à 10 clics
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Le Planche à cliquer Magneto 10™ est une carte complémentaire compacte qui contient un magnétomètre 3D. Cette carte comprend le MLX90392, un magnétomètre de plage +/-5mT pour les applications à faible bruit de Melexis Technologies. Le MLX90392, spécialement conçu pour les applications de micropuissance, mesure les champs magnétiques selon les trois axes (X, Y étant dans un plan parallèle à la surface de la matrice et Z étant perpendiculaire à la surface). Ces mesures et la température du MLX90392 sont converties en mots de 16 bits, transférés sur demande via une communication I2C.
Le tableau magnétique à 10 clics™ convient à la détection de position nécessitant une petite plage magnétique et une mesure de position précise où le bruit est un paramètre de conception critique.
How Does The Magneto 10 Click Board™ Work?
The Magneto 10 Click Board™ as its foundation uses the MLX90392, a three-axis micropower magnetic field sensor for low-noise applications based on a proprietary Triaxis technology from Melexis Technologies. The MLX90392 comes in a version of a ±5mT full-scale range for leveraging Melexis' patented Triaxis Hall technology to deliver low noise and best-in-class accuracy. It offers a 16-bit output proportional to the magnetic flux density sensed along the XYZ axes and temperature output signal. It also features a Power-Down mode that helps save energy and maximize run-time in battery-powered applications.
Whereas the ±5mT, the MLX90392 includes several operational modes, the sensitivity of 0.15µT/LSB and typical RMS noise down to 0.3µT. By selecting which axes are to be measured, the raw data can be used as input for further post-processing by an external MCU, making the device suitable for position sensing that requires a small magnetic range and precise position measurement where noise is a critical design parameter.
The MLX90392 also requires a supply voltage of 1.8V to work regularly. Therefore, a small LDO regulator, BH18PB1WHFV from Rohm Semiconductor, provides 1.8V out of mikroBUS™ power rails. This LDO cut power consumption by lowering its current consumption to approximately 2μA when the application is operating in the Standby state.
The Magneto 10 Click Board™ communicates with MCU using a standard I2C 2-Wire interface that supports Standard and Fast Mode Plus operation. Since the sensor for operation requires a 1.8V logic voltage level only, this Click board™ also features the PCA9306 voltage-level translator from Texas Instruments. The I2C interface bus lines are routed to the dual bidirectional voltage-level translator, allowing this Click board™ to work with both 3.3V and 5V MCUs properly.
The Magneto 10 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the I2C communication lines properly. However, the Click board™ comes equipped with a library that contains easy-to-use functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
| Type | Magnetic |
| Applications | Can be used for position sensing requiring a small magnetic range and precise position measurement where noise is a critical design parameter |
| On-board modules | MLX90392 - three-axis micropower magnetic field sensor for low-noise applications based on a proprietary Triaxis technology from Melexis Technologies |
| Key Features | Low power consumption, high precision, Triaxis Hall technology for best-in-class in noise, integrated temperature sensor, 16-bit digital magnetic and temperature output, selectable operational modes, and more |
| Interface | I2C |
| Compatibility | mikroBUS |
| Click board size | S (28.6 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout on the Magneto 10 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| NC | 1 | AN | PWM | 16 | NC | ||
| NC | 2 | RST | INT | 15 | NC | ||
| NC | 3 | CS | RX | 14 | NC | ||
| NC | 4 | SCK | TX | 13 | NC | ||
| NC | 5 | MISO | SCL | 12 | SCL | I2C Clock | |
| NC | 6 | MOSI | SDA | 11 | SDA | I2C Data | |
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1 | VCC SEL | - | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
MAGNETO 10 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| Magnetic Flux Density | -5 | - | 5 | mT |
| Sensitivity | - | 0.15 | - | µT/LSB |
| Resolution | - | 16 | - | bit |
| Operating Temperature Range | -40 | +25 | +85 | °C |
Software Support
We provide a library for the Magneto 10 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe GitHub account.
Library Description
This library contains an API for the Magneto 10 Click Board™ driver.
Key functions
-
magneto10_get_magnetic_fluxThis function reads the raw values of the X, Y, and Z-axis and converts them to magnetic flux data in microTesla. -
magneto10_get_temperatureThis function reads the raw temperature value and converts it to Celsius. -
magneto10_set_operating_modeThis function sets the device operating mode.
Example Description
This example demonstrates the use of the Magneto 10 Click Board™.
void application_task ( void )
{
float x_axis, y_axis, z_axis, temperature;
if ( MAGNETO10_OK == magneto10_get_magnetic_flux ( &magneto10, &x_axis, &y_axis, &z_axis ) )
{
log_printf( &logger, " X-axis: %.2f uTrn Y-axis: %.2f uTrn Z-axis: %.2f uTrn",
x_axis, y_axis, z_axis );
}
if ( MAGNETO10_OK == magneto10_get_temperature ( &magneto10, &temperature ) )
{
log_printf( &logger, " Internal temperature: %.2f Crnn", temperature );
}
Delay_ms ( 100 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe GitHub account.
Other Mikroe Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.Magneto10
Additional Notes and Information
Depending on the development board you are using, you may need a USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.
MIKROSDK
The Magneto 10 Click Board™ is supported with mikroSDK - MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.
Tableau magnétique à 10 clics
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