4채널 SPI 절연 모듈 -ISOW7743
(SPI ISOLATOR 8 CLICK)
개요
- 본 제품은 4채널 SPI 절연 모듈 -ISOW7743입니다.
- ISOW7743 4채널 디지털 아이솔레이터를 기반으로 디자인된 제품입니다.
- 절연 회로간 최대 100Mbps 의 데이터 전송 레이트를 지원합니다.
- 최대 60초동안 5kVRMS 전압에서 견딜 수 있습니다.
특징
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HOW DOES IT WORK?
SPI Isolator 8 Click is based on the ISOW7743, a quad-channel digital isolator from Texas Instruments. The ISOW7743 is galvanically isolated and comes with an integrated high-efficiency DC-DC power converter with low emissions, which provides up to 550mW of isolated power. This way, the SPI Isolator 8 Click eliminates the need for a separate isolated power supply in space-constrained isolated designs. The integrated signal isolation channels employ an ON-OFF keying (OOK) modulation scheme to transmit data across a silicon-dioxide based isolation barrier. The transmitter sends a high-frequency carrier across the barrier to represent one state and sends no signal to represent the other state, while the receiver demodulates the signal after signal conditioning and produces the output through a buffer stage.
There are a few jumpers that allow you to use some of the isolator's features. The VIN SEL allows you to choose the supply voltage for isolation channels between the external and ISOW7743's converter output voltage. As external, you can use the voltages in a range of 2.25 – 5.5V. The VOUT SEL jumper allows you to choose the ISOW7743's converter output voltage level. You can connect the external SPI device over the screw terminal. Besides, you can also connect an external power supply over the VEXT screw terminal, and isolated SPI device enable logic over the EN2 terminal. Over the VOUT terminal, you can power the connected SPI device.
SPI Isolator 8 Click uses a standard 4-Wire SPI serial interface to establish communication between the host MCU and the connected SPI device that needs to be isolated. The isolator features a multifunctional power converter enable input pin, that also serves as a fault output pin. Obviously, you can not use both at the same time. Those functions are available on pins ENP and FLT of the mikroBUS™ socket. To enable the host MCU side of the SPI Isolator 8 Click, you can use the ENC pin with a HIGH logic state.
This Click board™ can operate with either 3.3V or 5V logic and power voltage levels selected via the VIO and VCC SEL jumpers. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, 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 Isolators,SPI Applications Can be used for the development of factory automation, motor control, grid infrastructure, medical equipment, test, and measurement devices, and more On-board modules ISOW7743 - quad-channel digital isolator from Texas Instruments Key Features Integrated DC-DC converter with low emissions, high-efficiency output power, and independent power supply for channel isolator and power converter, robust electromagnetic compatibility, enabling any of the isolator's sides, isolated side power source selection, and more Interface SPI ClickID Yes Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V or 5V