AC/DC 홀 전류 센서 -ACS37002
(HALL CURRENT 16 CLICK)
개요
- 본 제품은 AC/DC 홀 전류 센서 -ACS37002입니다.
- ACS37002 센서를 장착하고 있으며, 핀으로 설정가능한 게인으로 센서 감도를 선택할 수 있습니다.
- SPI 인터페이스를 가지고 있습니다.
특징
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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.
HOW DOES IT WORK?
Hall Current 16 Click is based on the ACS37002, a 400kHz high-accuracy current sensor from Allegro Microsystems. It is a fully integrated Hall-effect current sensor, factory trimmed to provide high accuracy over the entire operating range without user programming. The current is sensed differentially by two Hall plates that subtract out interfering external common mode magnetic fields. The Hall sensor has no physical connection to the integrated current conductor, as the ACS37002 provides high isolation by magnetically coupling the field generated by the current in the conductor.
The current sensor features overvoltage detection, overcurrent fault, temperature compensation, and more. The ACS37002 is rated to withstand 3125VRMS of dielectric voltage. The IP+ and IP- terminals are fused internally and allow connecting the load over the load connectors. Depending on the position of the two GAIN SEL jumpers, the gain can be set as high as 66.7A for IP as a maximum. By default, the gain is set to 0 position on both jumpers, which results in a 50A bidirectional gain. The sensitivity can range from 19.8 to 39.6mV/A depending on the chosen gain.
The current sensor on the Hall Current 16 Click sends its output along with the zero current voltage reference to the ADC122S101, a two-channel 12-bit A/D converter from Texas Instruments. This ADC is fully specified over a sample rate range of 500ksps to 1Msps. It is based on a successive/approximation register architecture with an internal track-an-hold circuit.
Hall Current 16 Click uses a standard 4-Wire SPI serial interface of the ADC122S101 to communicate with the host MCU. If the sensed current exceeds the comparator threshold, the overcurrent fault (OCF) pin will trigger with an active LOW flag. The threshold can be set in percentage of full-scale output swing. You can turn off the overcurrent fault functionality.
This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the PWR SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. This 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,Measurements Applications Can be used for the development of applications requiring a combination of high-current monitoring and high isolation voltage between the primary high-current and low-voltage sides On-board modules ACS37002 - 400KHz high-accuracy current sensor from Allegro Microsystems ADC122S101 - 12-bit A/D converter from Texas Instruments Key Features Externally configurable gain settings, adjustable fast overcurrent fault, differential sensing for high immunity to external magnetic fields, high accuracy, high operating bandwidth for fast control loops, low internal primary conductor resistance, highly isolated device, and more Interface SPI ClickID Yes Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V or 5V