Hello,
I'm working on my first design with a ONET4291VA, and I have trouble setting the modulation and bias currents. I suspect that the issue lies with the i2c-like serial interface, since there are no other connection to the microcontroller other than the DISABLE line (which I keep low). Please take a look at the attached screen-shot of the two bus lines - I labelled them with what I expect them to do.
The datasheet mentions maximum rise and fall times of 10ns - is this correct? It seems demanding on an open-drain output.
Thank you and best regards,
Hauke