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MIKROE-6632
28 g
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Hall Current 22 Click is a compact add-on board designed for precise and isolated measurement of bidirectional current flow. This board features the ACS37041KLHBLT-010B3, an integrated Hall effect current sensor from Allegro Microsystems. It offers a shuntless, galvanically isolated analog voltage output with ±10A current sensing range, 132mV/A sensitivity, and a low 1.6mΩ internal conductor resistance for minimal power loss. It supports 100VRMS functional isolation and is AEC-Q100 Grade 1 qualified, ensuring robust performance in demanding environments. Ideal for use in industrial motor control, renewable energy systems like string and micro inverters, and personal mobility applications.
Hall Current 22 Click is fully compatible with the mikroBUS™ socket and can be used on any host system supporting the mikroBUS™ standard. It comes with the mikroSDK open-source libraries, offering unparalleled flexibility for evaluation and customization. What sets this Click board™ apart is the groundbreaking ClickID feature, enabling your host system to seamlessly and automatically detect and identify this add-on board.
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DO NOT TOUCH THE BOARD WHILE THE LOAD IS CONNECTED!
Note: This Click board™ needs to be used by trained personnel only while applying high voltages. Special care should be taken when working with hazardous voltage levels.
Hall Current 22 Click is based on the ACS37041 (ACS37041KLHBLT-010B3), an integrated Hall effect current sensor from Allegro Microsystems, to provide current sensing in a wide range of industrial and energy-related applications. This sensor delivers a shuntless, self-contained current measurement solution, eliminating the need for an external sense resistor. It outputs an analog voltage signal that is galvanically isolated from the current being measured, enhancing safety and system flexibility. Hall Current 22 Click is well-suited for use in industrial motor drives, clean energy string and micro inverters, as well as personal mobility systems.
The internal current conductor of the ACS37041 features a low resistance of just 1.6mΩ, making it suitable for applications with stringent power dissipation requirements. With support for bidirectional current measurement up to ±10A, a high sensitivity of 132mV/A, and a functional working voltage of 100VRMS, this sensor offers reliable and accurate performance. Additionally, the ACS37041 is AEC-Q100 Grade 1 automotive qualified, ensuring robust operation in demanding environments.
The ACS37041's output 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 sent directly to an analog pin of the mikroBUS™ socket labeled as AN. Selection can be performed via an onboard SMD switch labeled AD SEL, placing it in an appropriate position marked as AN or I2C.
This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. It also comes equipped with a library containing functions and example code that can be used as a reference for further development.
Type
Current sensor,Measurements
Applications
Ideal for use in industrial motor control, renewable energy systems like string and micro inverters, and personal mobility applications
On-board modules
ACS37041 (ACS37041KLHBLT-010B3) - integrated Hall effect current sensor from Allegro Microsystems
Key Features
Integrated Hall-effect current sensor, shuntless current measurement, galvanic isolation, analog voltage output, ±10A bidirectional current sensing, high sensitivity, low resistance current conductor, low power dissipation, automotive grade qualification, I2C or analog output selection, and more
Interface
Analog,I2C
Feature
ClickID
Compatibility
mikroBUS™
Click board size
L (57.15 x 25.4 mm)
Input Voltage
3.3V
This table shows how the pinout on Hall Current 22 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
Label | Name | Default | Description |
---|---|---|---|
LD1 | PWR | - | Power LED Indicator |
SW1 | AD SEL | Right | Output Voltage A/D Selection AN/I2C: Left position AN, Right position I2C |
Description | Min | Typ | Max | Unit |
---|---|---|---|---|
Supply Voltage | - | 3.3 | - | V |
Current Range | -10 | - | +10 | A |
Sensitivity | - | 132 | - | mV/A |
Hall Current 22 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.
Example Description
This example demonstrates the use of Hall Current 22 Click board by reading and displaying the input current measurements.
Key Functions
hallcurrent22_cfg_setup
This function initializes Click configuration structure to initial values.hallcurrent22_init
This function initializes all necessary pins and peripherals used for this Click board.hallcurrent22_calib_offset
This function calibrates the zero current offset value.hallcurrent22_calib_resolution
This function calibrates the data resolution at the known load current.hallcurrent22_read_current
This function reads the input current level [A].Application Init
Initializes the driver and calibrates the zero current offset and data resolution at 1A load current.
Application Task
Reads the input current measurements and displays the results on the USB UART approximately once per second.
Application Output
This Click board can be interfaced and monitored in two ways:
Additional Notes and Information
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
NOTE: Please be advised that any peripheral devices or accessories shown connected to the Click board™ are not included in the package. Check their availability in our shop or in the YMAN section below.