I have been trying to evaluate the chip's performance for a multidrop LVDS topology, but I have so far been unsuccessful to get it to function even for a point-to-point connection. I'm attaching my test schematic below. I have two same transceiver chips functioning as a transmitter for one and the receiver for the other. When I power on the chips, I see a current draw of around 40mA, which is typical at according to the datasheet. I apply the following input to the IN1 / IN2 ports from the AWG:
Square wave @100kHz @ 3.2Vpp (from 0V to 3.2V).
When I connect a probe to the output terminal (OUT1 or OUT2), all I see if the noisy 3.3V DC output instead of the original input square wave. I think the chip could be in a failsafe state? I'm not sure. When I look at the LVDS signal itself with a single ended probe (OUT1+ & OUT1-), I see a noisy 3.3V DC output on OUT1+ line and a very noisy square wave of about 0.3Vpp centered at around 3V at OUT1-. I think this is wrong as the LVDS signal is supposed to swing at around 1.2V common mode voltage, and not 3V.
I suspect that the transmitter chip might have somehow got damaged. I checked all of my connections as well as the design itself. It looks correct to me as it's a very easy circuit. Before I proceed with changing the chip, do you recommend looking at anything else or is there anything that you think I might have missed in this circuit? Thank you
