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Part Number: ISO1540
I am looking into the device ISO1540 to galvanically isolate the Master from the slaves.
My system has 4 boards each with micro-controller and they are identical in PCBs.
Board 1 acts as the bus master while other 3 boards are slaves at the bus. I want to isolate the master as well as the slaves galvanically from the I2C bus via a DC/DC converter.
I attach my design below. Is its possible to achieve this?
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In reply to Tejas Hommaradi:
In reply to sns22:
Could you let me know how far these boards are placed to each other? Do these boards share common bus side ground? (GND2)
Connecting 2 devices in parallel shouldn't be a problem if the pull up resistors are chosen to achieve the required rise time values.
The bus side ground should be connected at a common point (forming a star type connection) to minimize the potential ground loops.
Hi, We intent to use this setup as a slow control clocking @100kHz or max. 400kHz. Well, no our environment is not so noisy as we avoid ground loops throughout the system. Each of the board has its own power supply and GND. Although all the GNDs can be connected via Earth in future.
I would also like to know what means in the datasheet
The ISO1540 is suitable for multimaster applications. For applications where clock stretching by the slave is possible, the ISO1540 device should be used. What is clock stretching?
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