I am using the Si Si834x-EVB Board to do the evaluation. I can write the data into Si83408ADA and enable the B1 of the channel, but I can't read any diagnosis information back as below picture.
The MISO is a tristate pin, so I use a 10K pull-up resistor and I try to visit different register addresses, but also not useful.
According to Si838x datasheet, section 3.4.1, page 7:
"To enhance the robustness of a design, the user may also include resistors (50–300 Ω) in series with the outputs if the system is excessively noisy."
My application is a PLC, so customers can use the PLC in noisiest environments.
Because high-energy pulses are filtered by device "optocoupler", my question: Is really necessary the series resistors on output side?. What is the purpose?. Avoid EMI or meet EMC?. Could you explain why?.
I'm using the parallel device, but, this is apply to serial devices with SPI also?.
I just wanted to know whether both output channel of Si8273/4/5 are isolated from each other if we provide isolated power supply to each of (VDDA-VSSA) and (VDDB-VSSA)?
For example, can we use Si8273/4/5 to drive two switches of "two-switch forward converter"?
I am using SI8900 ADC with UART communication.
Auto Baud rate process:-
Master transmit 0xAA command frequently. Si8900 have to reply 0x55 command for successful communication establish. But i have not received 0x55 value . Si8900 replies 0xAB and 0x02 frequently. i have tried with 9600 baud rate to maximum baud rate value with serial Emulator. Kindly support us for establish the successful communication. i have attached the excel sheet with the sample data's which we received for your reference.
I cannot find it in the datasheet: can the voltage driving VO by a resistor be significantly higher than VDD, provided that they are both within the 30V limit? In other words, how open collector is this open collector output depicted on the schematic?
Best regards, Piotr
I have a question about the opto-Coupler SI8710CC，in the datasheet I can't find the parament “CTR”, I want to know the reason.
In addition I have a project of switching power supply, I want to use this opto-Coupler and TL431 as the feedback sectioln, if SI8710CC is not the solution, pls recommend a proper opto-Coupler, thanks.
We have an isolated PoE PD test board with an Si3402-B on board, using a Coilcraft FA2732 transformer to create an isolated +12V at the output.
Class detection works fine, but when starting the PSE, the output ramps to approx. 8V and then it aborts; the PSE reports OVL.
Do you see any obvious issue in the enclosed schematics? Can the opto-coupler have a significant influence on the boot-up process?
Thanks for your help.