ADM3055E/ADM3057E TX Port Over 1M Data Rate Fail

Hi Jack, 

What is the state of the RS pin? JP4 on the EVAL-ADM3055EEBZ will set the part in and out of slope control mode. 

Regards,

Jason

Hi Jnaso,

This test case  RS pin is 47K ohm resistor to GND ,and VIO short to VDD1 ,SILENT STBY AUXIN pins to Low.

Best
Jack

Hi Jack, 

Connect the ADM3055E's RS pin to ground for high speed data. This is likely the reason for the distorted waveform on the CAN bus. Please refer to the ADM3055E datasheet Pin Configuration section. There is also a subsection about the RS pin in Theory of Operation which will describe the operation in greater detail. 

Slope control mode should only be used for low data rates. 

Regards,

Jason 

Hi Jnaso.

Thanks for your support ,I can TX port test to 12MHz.

Best

Jack

Hi Jnaso.

Thanks for your support ,I can TX port test to 12MHz.

Best

Jack