홀 전류 센서 -TMCS1108A2U
(HALL CURRENT 11 CLICK)
개요
- 본 제품은 홀 전류 센서 -TMCS1108A2U입니다.
- 100V 절연된 TMCS1108A2U 전류센서 기반으로 디자인된 제품입니다.
- I2C 인터페이스를 가지고 있으며, 3.3V/5V 시스템과 사용이 가능합니다.
- 알림: 외부 전원이 인가되어 있을때 보드를 만지지 마십시오. 위험할 수 있습니다.
특징
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HOW DOES IT WORK?
Hall Current 11 Click as its foundation uses the TMCS1108A2U, a precision Hall-effect current sensor, featuring a 100V functional isolation working voltage, <3% full-scale error across temperature, and both unidirectional and bidirectional current sensing from Texas Instruments. The input current flows through a 1.8mΩ resistance conductor between the isolated input current pins, minimizing power loss and thermal dissipation. The magnetic field generated by the input current is sensed by a Hall sensor and amplified by a precision integrated signal chain. The TMCS1108A2U can be used for both AC and DC current measurements with a bandwidth of 80kHz.
The TMCS1108A2U is optimized for high accuracy and temperature stability, with both offset and sensitivity compensated across the entire operating temperature range. Based on the selected logic voltage VCC, the TMCS1108A2U allows the user to measure current in two appropriate ranges, where after that, can process the output signal in analog or digital form. With the selected logic voltage of 3.3V, it is possible to measure the current from -2.8A to 27.7A, while with the chosen 5V, it is possible to measure it in the range from -4.5A to 43A.
The analog output signal of the TMCS1108A2U 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 analog pin of the mikroBUS™ socket labeled as AN. Selection can be performed by onboard SMD jumper labeled as ADC SEL to an appropriate position marked as AN and I2C.
The MCP3221 provides one single-ended input with low power consumption, a low maximum conversion current, and a Standby current of 250μA and 1μA, respectively. Data can be transferred at rates of up to 100kbit/s in the Standard and 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 VCC SEL jumper. This way, it is allowed for 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.
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Type Current sensor Applications Can be used for AC or DC current-sensing in industrial, commercial, and communications systems On-board modules TMCS1108A2U - galvanically isolated Hall-effect current sensor with high accuracy, excellent linearity, and temperature stability from Texas Instruments Key Features Low power consumption, high accuracy, featuring a 100V functional isolation working voltage, bigger than 3% full-scale error across temperature, both unidirectional and bidirectional current sensing, possibility of signal processing in analog and digital form, and more Interface Analog,I2C Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V or 5V