DC/DC converters isolated

[wizpic]

I'm currently working on a project where I need to have an 5V isolated supply from a single 5V supply.
I've been looking at these RI3-0505S Isolated Module DC DC Converter 1 Output 5V 600mA 4.5V - 5.5V Input rather than having 2 transformers/rectifiers to supply the 5V isolated power

I will be running an ESP32 (5V input A) with a 3.3V regulator to run it, The 5V input A will be running other stuff, Then on the isolated part I will be using a MCP4822 12bit DAC running through an SI8630 on the SPI bus and a MCP3426 16Bit ADC running through an SI8600 I2C isolator. One side will be connected to Input A then on the isolated side Output A (5V).

Would this be the best approach and any precautions required ?

 

[zenerbjt]

seems ok but hopefully this is not for going across a mains isolation barrier as that RECOM module isnt rated for those kinds of isolation voltages.

 

[wizpic]

No its pure DC voltage of 5V. It's just so that I can just use one transformer and rectifier smoothing capacitors to convert the 9VAC into 9VDC then regulator to 5VDC, Then one of the RI3-0505S to give me the 5VDC isolated supply

 

[KlausST]

Hi,

What zenerbjt means: what's the voltage (peak) between input and output of the DCDC converter?

If ADC and DAC refer to the same potential I recommend to use both with SPI interface.
It's the simplest.

Klaus