We are using the ISO1500DBQ isolated RS485 transceiver IC in one design to give us an RS485 MODBUS port. On another design we are using a Linear Tech component. Same code is being used on both boards to communicate on the bus. On the board with the ISO1500DBQ we are unable to run the bus any faster than 33,600 baud rate. On the board with the Linear Tech component we can go all the way up to 115200. I see a big difference between these two components is that the IS01500DBQ has a max speed of 1Mbps whereas the Linear Tech component is 20Mbps. Is there any reason the ISO1500DBQ wouldn’t be able to run 115200?
Thanks
Viktorija