The VCP Monitor 4 Click Board™ as its foundation uses the INA239, a digital current sense amplifier with a 4-wire serial digital interface from Texas Instruments. It measures shunt and bus voltage and internal temperature while calculating the power necessary for accurate decision-making in precisely controlled systems. The input stage of the INA239 is designed such that the input common-mode voltage can be higher than the device supply voltage. It operates from mikroBUS™ power rails but can measure voltage and current as high as 85V, making it well suited for high-side and low-side current measurements.
Its integrated 16-bit ADC allows for selectable conversion times from 50μs to 4.12ms and sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data. It also features low offset and gain-drift and low input bias current, which reduces the current consumed in both Active and Shutdown operational states. Another benefit of low bias current is that it allows the use of larger current-sense resistors (in this case, onboard R4 shunt 25MΩ resistor), thus providing accurate, current measurements in the micro-amp range. Besides, it can also measure the temperature through the integrated temperature sensor in a range from -40ºC up to +125ºC.
Its integrated 16-bit ADC allows for selectable conversion times from 50μs to 4.12ms and sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data. It also features low offset and gain-drift and low input bias current, which reduces the current consumed in both Active and Shutdown operational states. Another benefit of low bias current is that it allows the use of larger current-sense resistors (in this case, onboard R4 shunt 25MΩ resistor), thus providing accurate, current measurements in the micro-amp range. Besides, it can also measure the temperature through the integrated temperature sensor in a range from -40ºC up to +125ºC.
The VCP Monitor 4 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 SPI 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 | Measurements |
| Applications | Can be used for applications such as industrial measurements, DC-DC converters, power inverters, telecom equipment, servers, and many more |
| On-board modules | INA239 - ultra-precise digital power monitor with a 16-bit delta-sigma ADC specifically designed for current-sensing applications from Texas Instruments |
| Key Features | Low power consumption, high precision, high-resolution ADC, accuracy, fast alert response, programmable conversion time and averaging, and more |
| Interface | SPI |
| Compatibility | mikroBUS |
| Click board size | M (42.9 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
This table shows how the pinout on VCP Monitor 4 Click 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 | ALR | Alert | |
| SPI Chip Select | CS | 3 | CS | RX | 14 | NC | |
| SPI Clock | SCK | 4 | SCK | TX | 13 | NC | |
| SPI Data OUT | SDO | 5 | MISO | SCL | 12 | NC | |
| SPI Data IN | SDI | 6 | MOSI | SDA | 11 | NC | |
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| LD2 | ALERT | - | Alert LED Indicator |
| JP1 | VCC SEL | Left | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| Common-mode Input Range | 0 | - | 85 | V |
| ADC Resolution | - | 16 | - | bits |
| Operating Temperature Range | -40 | +25 | +125 | °C |
We provide a library for the VCP Monitor 4 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.
This library contains an API for VCP Monitor 4 Click driver.
vcpmonitor4_cfg_setup - Config Object Initialization function.vcpmonitor4_init - Initialization function.vcpmonitor4_default_cfg - Click Default Configuration function.This example application showcases the ability of Click board to be configured for different readings and reads temperature, voltage, current and power.
The demo application is composed of two sections :
void application_task ( void )
{
float read_data;
vcpmonitor4_get_temperature( &vcpmonitor4, &read_data );
log_printf( &logger, " > Temperature:t%.2f rn", read_data );
vcpmonitor4_get_vbus( &vcpmonitor4, &read_data );
log_printf( &logger, " > Vbus[V]:t%.2f rn", read_data );
vcpmonitor4_get_vshunt( &vcpmonitor4, &read_data );
log_printf( &logger, " > Vshunt[mV]:t%.2f rn", read_data );
vcpmonitor4_get_current( &vcpmonitor4, &read_data );
log_printf( &logger, " > Current[A]:t%.2f rn", read_data );
vcpmonitor4_get_power( &vcpmonitor4, &read_data );
log_printf( &logger, " > Power[W]:t%.2f rn", read_data );
log_printf( &logger, "*************************rn" );
Delay_ms( 500 );
}
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:
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.
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.
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It measures shunt and bus voltage and internal temperature while calculating the power necessary for accurate decision-making in precisely controlled systems. The input stage of the INA239 is designed such that the input common-mode voltage can be higher than the device supply voltage. It operates from mikroBUS™ power rails but can measure voltage and current as high as 85V, making it well suited for high-side and low-side current measurements."}]},{"type":"paragraph","children":[{"type":"text","value":""}]},{"type":"paragraph","children":[{"type":"text","value":"Its integrated 16-bit ADC allows for selectable conversion times from 50μs to 4.12ms and sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data. It also features low offset and gain-drift and low input bias current, which reduces the current consumed in both Active and Shutdown operational states. Another benefit of low bias current is that it allows the use of larger current-sense resistors (in this case, onboard R4 shunt 25MΩ resistor), thus providing accurate, current measurements in the micro-amp range. Besides, it can also measure the temperature through the integrated temperature sensor in a range from -40ºC up to +125ºC."}]},{"type":"paragraph","children":[{"type":"text","value":"Its integrated 16-bit ADC allows for selectable conversion times from 50μs to 4.12ms and sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data. It also features low offset and gain-drift and low input bias current, which reduces the current consumed in both Active and Shutdown operational states. Another benefit of low bias current is that it allows the use of larger current-sense resistors (in this case, onboard R4 shunt 25MΩ resistor), thus providing accurate, current measurements in the micro-amp range. Besides, it can also measure the temperature through the integrated temperature sensor in a range from -40ºC up to +125ºC."}]},{"type":"paragraph","children":[{"type":"text","value":"The"},{"type":"text","value":" ","bold":true,"italic":true},{"type":"text","value":"VCP Monitor 4 Click Board™","bold":true},{"type":"text","value":" ","italic":true},{"type":"text","value":" 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 SPI 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":"paragraph","children":[{"type":"text","value":" "}]},{"type":"paragraph","children":[{"type":"text","value":"Type\nMeasurements\nApplications\nCan be used for applications such as industrial measurements, DC-DC converters, power inverters, telecom equipment, servers, and many more\nOn-board modules\nINA239 - ultra-precise digital power monitor with a 16-bit delta-sigma ADC specifically designed for current-sensing applications from Texas Instruments\nKey Features\nLow power consumption, high precision, high-resolution ADC, accuracy, fast alert response, programmable conversion time and averaging, and more\nInterface\nSPI\nCompatibility\nmikroBUS\nClick board size\nM (42.9 x 25.4 mm)\nInput Voltage\n3.3V or 5V"}]},{"type":"paragraph","children":[{"type":"text","value":" "}]},{"type":"heading","level":3,"children":[{"type":"text","value":"PINOUT DIAGRAM"}]},{"type":"paragraph","children":[{"type":"text","value":"This table shows how the pinout on VCP Monitor 4 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns)."}]},{"type":"paragraph","children":[{"type":"text","value":"Notes\nPin\nPin\nNotes\nNC\n1\nAN\nPWM\n16\nNC\nNC\n2\nRST\nINT\n15\nALR\nAlert\nSPI Chip Select\nCS\n3\nCS\nRX\n14\nNC\nSPI Clock\nSCK\n4\nSCK\nTX\n13\nNC\nSPI Data OUT\nSDO\n5\nMISO\nSCL\n12\nNC\nSPI Data IN\nSDI\n6\nMOSI\nSDA\n11\nNC\nPower Supply\n3.3V\n7\n3.3V\n5V\n10\n5V\nPower Supply\nGround\nGND\n8\nGND\nGND\n9\nGND\nGround"}]},{"type":"heading","level":3,"children":[{"type":"text","value":"ONBOARD SETTINGS AND INDICATORS"}]},{"type":"paragraph","children":[{"type":"text","value":"Label\nName\nDefault\nDescription\nLD1\nPWR\n-\nPower LED Indicator\nLD2\nALERT\n-\nAlert LED Indicator\nJP1\nVCC SEL\nLeft\nLogic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V"}]},{"type":"heading","level":3,"children":[{"type":"text","value":"VCP MONITOR 4 CLICK ELECTRICAL SPECIFICATIONS"}]},{"type":"paragraph","children":[{"type":"text","value":"Description\nMin\nTyp\nMax\nUnit\nSupply Voltage\n3.3\n-\n5\nV\nCommon-mode Input Range\n0\n-\n85\nV\nADC Resolution\n-\n16\n-\nbits\nOperating Temperature Range\n-40\n+25\n+125\n°C"}]}]} - summary:The VCP Monitor 4 Click Board™ is a compact add-on board that represents a high-precision power monitoring system. This board features the INA239, ultra-precise digital power monitor with a 16-bit delta-sigma ADC specifically designed for current-sensing applications from Texas Instruments. The INA239 reports current, bus voltage, temperature, and power while performing the needed calculations in the background. The integrated temperature sensor is ±1°C accurate for die temperature measurement and is also helpful in monitoring the ambient system temperature. This Click Board™ is suitable for applications such as industrial measurements, DC-DC converters, power inverters, telecom equipment, servers, and many more.
The VCP Monitor 4 Click Board™ is supported by a mikroSDK compliant library, which includes functions that simplify software development. This Click Board™ comes as a fully tested product, ready to be used on a system equipped with the mikroBUS™ socket.