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Issue with ADUM1201BR

Question asked by Subrah on Aug 31, 2012
Latest reply on Oct 11, 2012 by Subrah



This is in continuation to my previous post, adding portion of the schematic diagram.

The i coupler used here to isolate one of the OEM device from main circuit. OEM device talks to us at 9600 Baud rate by using RS232 protocol.

There is a RS232 level translator used to convert RS232 levels to TTL/CMOS levels.


ADUM1201 Pin # 6 is host side (TTL/CMOS) input (Host RXD) (wafeform not taken)

ADUM1201 Pin # 7 is host side (TTL/CMOS) output(host TXD) (waveform # 2, in light blue color)

ADUM1201 Pin # 3 OEM device side (TTL/CMOS) output (OEM TXD) (waveform # 4 in Green color)

ADUM1201 Pin # 2 OEM device side (TTL/CMOS) input (OEM RXD) (waveform # 1 in Dark Blue color)


PL click on the waveform graphic for viewing in zoom mode, graphic shall pop up automatic.

Hope the inputs are sufficient for your analysis.

Thanks and Regards,