Hall Current 10 Click Board™

Product Code: MIKROE-4587

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 diagramThis 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