LVDS transceiver RHFLVDSR2D2 - Differential voltage output failure

DMala.1 · ‎2023-09-13

Hello, I measure the output differential voltage of the drivers (with 100ohm termination resistor) and it is always higher than 0.4V that is referred to the datasheet. What I measure is about 0.68V. Is that normal?

Thank you in advance

Issamos · ‎2023-09-13

Hello @DMala.1

Is this the test circuit you have used.

The datasheet values are according to this test circuit.

Best regards.

II

View solution in original post

Issamos · ‎2023-09-13

Hello @DMala.1

Is this the test circuit you have used.

The datasheet values are according to this test circuit.

Best regards.

II

Tesla DeLorean · ‎2023-09-13

Related thread https://community.st.com/t5/interface-and-connectivity-ics/lvds-transceiver-rhflvdsr2d2-failure-info/td-p/590206

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TDK · ‎2023-09-13

Was this chip supplied with 5V? In which case, all bets are off.

Unclear what the connection is between this thread and the other, or why you posted there.

If you feel a post has answered your question, please click "Accept as Solution".

DMala.1 · ‎2023-09-14

Hello and thanks for the answers!

The chip is supplied with 3.3V and I measure on a termination resistor of 100Ohm as in picture 3 of the datasheet, what I don't use is the two capacitors.

Issamos · ‎2023-09-14

To have a credible result, you should use the same conditions as described in the datasheet (you should use the 2 capacitors).

Best regards.

II