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DS25BR100EVK: Startup issue with the evaluation board

Part Number: DS25BR100EVK
Other Parts Discussed in Thread: DS25BR120, DS25BR100, DS25BR110

Hi,

In order to test the impact of the pre-emphasis and equalization for our future projects, I ordered the DS25BR100EVK evaluation from Digikey.

At the first power on, there was a shortcut between the power line and the GND.

The current limitation of our power supply protected the board but we were unable to start it due to this shortcut.

We have investigated around the three ICs (U1, U2 and U3) and found some strange results over the output impedances of U1 and U2.

For example: we had 1KOhms between OUT+ and the GND. Also we didn't had the 100Ohms termination resistor on the output side.

I'm currently not able to test this eval board