2채널 양방향 I2C 절연 모듈 -ISO1644
(I2C ISOLATOR 5 CLICK)
개요
- 본 제품은 2채널 양방향 I2C 절연 모듈 -ISO1644입니다.
- 2채널 양방향 I2C 아이솔레이터 ISO1644 칩을 기반으로 디자인된 제품입니다.
- 최대 1.7Mhz의 데이터 레이트를 지원하며, hot swap 회로를 가지고 있어 데이터 노이즈를 방지합니다.
특징
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HOW DOES IT WORK?
I2C Isolator 5 Click is based on the ISO1644, a hot-swappable bidirectional I2C isolator with enhanced EMC and GPIOs from Texas Instruments. The ISO1644 bidirectionally buffers the two I2C signals across the isolation barrier while providing 5kVRMS of galvanic isolation. The isolation barrier consists of a double capacitive silicon dioxide and includes basic and reinforced insulation devices. In addition, the ISO1644 also integrates three unidirectional CMOS isolation channels with up to 50Mbps speed, which can be used for static GPIO signal isolation. It also integrates the logic required to support bidirectional channels.
ISO1644 supports I2C 2-Wire bidirectional data transfer between a host device and several peripheral devices, where the host MCU controls the bus, specifically the serial clock (SCL) line. The data transfer can be made in standard, fast, fast-mode plus, and high-speed mode with speeds up to 3.4Mbps. As for three GPIO lines, the ISO1644 consists of two lines in one direction and one in the opposite direction. It could be used for any GPIO purpose.
This Click board™ poses a terminal with isolated SCL and SDA lines. Besides, the terminal consists of VCC and GND lines and OUTA, OUTB, and INA, labeling the direction of the lines. Those GPIO lines are connected to the mikroBUS™ socket, thus the host MCU, via OTA, OTB, and INA pins. You can pull up the isolated I2C lines via unpopulated R6 and R7 jumpers if that suit your needs.
This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can 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 I2C,Isolators Applications Can be used for transferring digital signals between circuits with different power domains at ambient temperatures On-board modules ISO1644 - a hot-swappable bidirectional I2C isolator with enhanced EMC and GPIOs from Texas Instruments Key Features Robust galvanic isolation of digital signals withstands 5kVRMS, low power consumption, supports four I2C speeds, three additional GPIO lines ideal for isolation and glitch-free operation, excellent reliability, long operational life, and more Interface GPIO,I2C Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V