{"product_id":"isolator-for-spi-interface-with-inbuilt-dc-dc-converter","title":"Isolator for SPI Interface with Inbuilt DC-DC Converter","description":"\u003cp\u003e\u003cspan\u003eThis simple, compact solution is ideal for isolated SPI data requiring communication across different ground potentials often found in Industrial PLCs (programmable logic controllers) and Instrumentation and data acquisition systems. Serial Peripheral Interface (SPI) is a protocol that is commonly used for communication between microcontrollers and peripheral ICs such as sensors, ADCs, DACs, and others.  The project is based on an \u003c\/span\u003e\u003cstrong\u003eISOW7741\u003c\/strong\u003e\u003cspan\u003e quad-channel digital isolator with an integrated DC-DC converter. For many industrial control applications, the communications pathway between the microcontroller and the I\/O module devices must be isolated. Isolation helps to minimize noise and ground loop issues and also protects expensive control units (MCUs or FPGAs) and equipment operators. This module is the solution to all these problems and the inbuilt DC-DC converter is a great advantage that powers the output side of the circuitry and thus the project can work with a single supply. The DC-DC converter output can be used to power the peripherals device maximum load up to \u003c\/span\u003e\u003cstrong\u003e100mA\u003c\/strong\u003e\u003cspan\u003e with \u003c\/span\u003e\u003cstrong\u003e5V\u003csub\u003eDC\u003c\/sub\u003e\u003c\/strong\u003e\u003cspan\u003e input.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePower Supply Logic 1.71V to 5.5V\u003c\/li\u003e\n\u003cli\u003ePower Supply DC-DC Converter 3V to 5.5V\u003c\/li\u003e\n\u003cli\u003eSingle Supply Operation 3V to 5.5V (Logic Power + DC-DC Power)\u003c\/li\u003e\n\u003cli\u003eProject Supports 3.3V and 5V Interface\u003c\/li\u003e\n\u003cli\u003eMaximum Load Data Channel 15mA (I\/O)\u003c\/li\u003e\n\u003cli\u003eDC-DC Converter Output Available for Peripherals Load Up to 100mA with 5V Supply DC-DC Converter\u003c\/li\u003e\n\u003cli\u003e100 Mbps Data Rate\u003c\/li\u003e\n\u003cli\u003eIsolation Ratings 5000V-RMS\u003c\/li\u003e\n\u003cli\u003eIndependent power supply for channel isolator \u0026amp; power converter\u003c\/li\u003e\n\u003cli\u003e±8 kV IEC 61000-4-2 contact discharge protection across isolation barrier\u003c\/li\u003e\n\u003cli\u003eIntegrated DC-DC converter with low-emissions, low-noise\u003c\/li\u003e\n\u003cli\u003eEmission optimized to meet CISPR 32 and EN 55032 Class B with \u0026gt;5 dB margin on 2-layer board\u003c\/li\u003e\n\u003cli\u003eLow-frequency power converter at 25 MHz enabling low noise performance\u003c\/li\u003e\n\u003cli\u003eLow output ripple: 24 mV\u003c\/li\u003e\n\u003cli\u003eHigh-efficiency output power\u003c\/li\u003e\n\u003cli\u003eEfficiency at max load: 46%\u003c\/li\u003e\n\u003cli\u003eUp to 0.55-W output power\u003c\/li\u003e\n\u003cli\u003eOn Board Power LED (Logic Power)\u003c\/li\u003e\n\u003cli\u003eHeader Connectors for easy connections\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 50.17 x 21.75 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDC-DC Converter Input and Output\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDC-DC Converter Power Supply 5V DC =Output 5V DC, Load Current 110mA\u003c\/li\u003e\n\u003cli\u003eDC-DC Converter Power Supply 5V DC =Output 3.3V DC, Load Current 140mA\u003c\/li\u003e\n\u003cli\u003eDC-DC Converter Power Supply 3.3V DC =Output 3.3V DC, Load Current 60mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOutput Power (DC-DC Converter)\u003c\/h3\u003e\n\u003cp\u003eThe integrated isolated DC-DC converter uses advanced circuit and on-chip layout techniques to reduce radiated emissions and achieve up to 46% typical efficiency. The integrated transformer uses thin film polymer as the insulation barrier. The output voltage of the power converter can be controlled to 3.3 V or 5 V using V\u003csub\u003eSEL\u003c\/sub\u003e\u003cspan\u003e \u003c\/span\u003epin. Read Note 2 for output voltage selection.\u003c\/p\u003e\n\u003ch3\u003e4 Channel Input\/Outputs\u003c\/h3\u003e\n\u003cp\u003eThe project has four high-speed three forward and one reverse direction channels.  The first three forward channels can be used, for CS (Chip Select) CLK, MI\/SO, and the fourth reverse channel for MO\/SI (the slash indicates the connection of the particular input and output channel across the isolator)\u003c\/p\u003e\n\u003cp\u003eThe device ISOW7741 is high-performance, quad channel digital isolator with integrated DC-DC converter. Typically, digital isolators require two power supplies isolated from each other to power up both sides of device. Due to the integrated DC-DC converter in the device, the isolated supply is generated inside the device that can be used to power isolated side of the device and peripherals on isolated side, thus saving board space. The device uses single-ended CMOS-logic switching technology.\u003c\/p\u003e\n\u003ch3\u003eSPI Signals\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSCLK:  \u003c\/strong\u003eThe synchronous clock used by all devices. The master drives this clock and the slaves receive it. Note that SCLK can be gated and need not be driven between SPI transactions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMOSI\u003c\/strong\u003e: Master out, slave in. Also called DO on the Master or DI on the slave. This is the main data line driven by the master to all slaves on the SPI bus. Only the selected slave clocks data from MOSI.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMISO:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMaster in, slave out. Also called DI on the Master and DO on the Slave. This is the main data line driven by the selected slave to the master. Only the selected slave may drive this signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCS:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eChip Select, this signal is unique to each slave. When active (generally low) the selected slave must drive MISO based on SCLK transitions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47200786907308,"sku":"C110","price":22.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/C110.jpg?v=1789367092","url":"https:\/\/dotfry.com\/products\/isolator-for-spi-interface-with-inbuilt-dc-dc-converter","provider":"dotfry","version":"1.0","type":"link"}