Mikroelektronika d.o.o.
Hall Current 10 Click-Board
Hall Current 10 Click-Board
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Der Hall Current 10 Click Board™ ist eine kompakte Zusatzplatine, die kostengünstige und präzise AC- oder DC-Stromsensorlösungen bietet. Diese Platine verfügt über den ACHS-7194, einen vollständig integrierten, isolierten linearen Stromsensor auf Hall-Effekt-Basis für den Strombereich von ±40 A von Broadcom Limited. Im Inneren des ACHS-7194 befindet sich ein präziser, linearer Hall-Schaltkreis mit geringem Offset und einem Kupferleitungspfad in der Nähe der Chipoberfläche. Der durch diesen Kupferleitungspfad fließende Strom erzeugt ein Magnetfeld, das die differenziellen Hall-Sensoren in eine proportionale Spannung umwandeln, wobei der Benutzer anschließend die Möglichkeit hat, die Ausgangsspannung als analogen oder digitalen Wert zu verarbeiten.
Dieses Click Board™ eignet sich für die AC- oder DC-Strommessung in industriellen, kommerziellen und Kommunikationssystemen.
How Does The Hall Current 10 Click Board™ Work?
The Hall Current 10 Click Board™ as its foundation uses the ACHS-7194, a Hall-effect current sensor that sends an analogue voltage proportional to the magnetic field intensity caused by the current flowing through the primary input conductor from Broadcom Limited. Without a magnetic field, the output voltage is half of the supply voltage. The ACHS-7194 can detect both DC and AC designed for the current range of ±40A. Device accuracy is optimized across the operating ambient temperature through the close proximity of the magnetic signal to the Hall sensors.
The thickness of the copper conductor allows the survival of the device at high overcurrent conditions. The terminals of the conductive path are electrically isolated from the signal leads. This feature enables the ACHS-7194 to be used in applications requiring electrical isolation without optoisolators or other costly isolation techniques.
The ACHS-7194 also has a ratiometric output that means it changes proportionally to the supply voltage. Just like that, the output voltage, analogue signal, can be converted to a digital value using MCP3221, a successive approximation A/D converter with a 12-bit resolution from Microchip, using a 2-wire I2C compatible interface, or can be sent directly to an analogue pin of the mikroBUS™ socket Labelled as AN. Selection can be performed by onboard SMD jumper Labelled as ADC SEL to an appropriate position marked as AN and I2C.
With the MCP3221, data transfers at rates of up to 100kbit/s in the Standard and up to 400kbit/s in the Fast Mode. Also, maximum sample rates of 22.3kSPS with the MCP3221 are possible in a Continuous-Conversion Mode with a clock rate of 400kHz.
This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VIO SEL jumper. This way, it allows both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
Specifications
| Type | Current sensor |
| Applications | Can be used for AC or DC current sensing in industrial, commercial, and communications systems |
| On-board modules | ACHS-7194 - fully integrated Hall-effect-based isolated linear current sensor designed for the current range of ±40A from Broadcom Limited |
| Key Features | Output voltage proportional to AC or DC currents, ratiometric output from the supply voltage, high reliability, factory-trimmed for accuracy, stable output offset voltage, isolation voltage (3kVrms / 1 minute), and more |
| Interface | Analog, I2C |
| Compatibility | mikroBUS |
| Click board size | L (57.15 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
Pinout diagram
This table shows how the pinout on Hall Current 10 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| Analog Signal | AN | 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 | VIO SEL | Left | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
| JP2 | ADC SEL | Right | Output Voltage A/D Selection AN/ADC: Left position AN, Right position ADC |
Hall Current 10 Click electrical specifications
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| Input Current Range | -40 | - | +40 | A |
| Sensitivity | - | 50 | - | mV/A |
| Operating Temperature Range | -40 | +25 | +110 | °C |
Software Support
We provide a library for the Hall Current 10 Click 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 API for Hall Current 10 Click driver.
Key Functions
hallcurrent10_cfg_setup- Config Object Initialization function.hallcurrent10_init- Initialization function.hallcurrent10_default_cfg- Click the Default Configuration function.
Example Description
This library contains API for Hall Current 10 Click driver. The demo application reads ADC value, ADC voltage and current value.
The demo application is composed of two sections :
void application_task ( void )
{
hallcurrent10_read_adc( &hallcurrent10, &adc_data );
log_printf( &logger, " ADC Value : %d rn", adc_data );
Delay_ms( 100 );
hallcurrent10_get_adc_volatge( &hallcurrent10, &adc_voltage );
log_printf( &logger, " ADC Voltage : %.2f mV rn", adc_voltage );
log_printf( &logger, "- - - - - - - - - - - - -rn" );
Delay_ms( 100 );
hallcurrent10_get_current ( &hallcurrent10, ¤t );
log_printf( &logger, " Current : %.2f mA rn", current );
log_printf( &logger, "--------------------------rn" );
Delay_ms( 2000 );
}
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.HallCurrent10
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. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.
mikroSDK
This 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.
Hall Current 10 Click-Board
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