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DS25BR120: Device Fails

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

Dear Support Team,

we have an application were we use DS25BR120 and the DS25BR110 to drive a 500 MHz LVDS signal over appr. 1.5m external cable between two devices.

The cable is a RJ50 cable with rather poor HF properties - we will increase cable quality and length in next steps.

EQ and PRE are set und work fine in our long term tests, but some units came back from customers with defective DS25BR120.

There is basically a short between VCC and GND inside the device. 100Ohm termination can be measured at the input, but not at the output.

We use DC coupling.

Do you have any suggestion what could kill the DS25BR120 output to a complete device failure ?

Could you give any advises for testing ? Is there any approved protection circuit you can advise ?

BR,

KA