DS90UB947-Q1: There is a problem with the DS90UB947 stringer

ian wu

Part Number: DS90UB947-Q1

hi Ti engineer，

There is a question about the ds90ub947 serializer. About the LVDS CLK amplitude, the specification says 100-600mv, but I actually tested our board with only 60mV. Since there is no differential probe and 30mV is tested with a single end, have you encountered similar phenomena? Jumper resistance 100R. It's quite urgent. Please take a look. thank you!

over 3 years ago

0 ian wu over 3 years ago

Intellectual 745 points

is there any progress?

0 Shu Huang over 3 years ago in reply to ian wu

TI__Mastermind 18046 points

Hi Ian,

Apologies, it does not seem like my reply went through last time. Since the LVDS CLK signal is a differential signal, it is important to use a differential probe to get an accurate measure of the signal. In addition, the LVDS CLK is an input to the 947 and the source would need to be examined if the differential measurement still causes a problem.

Best,

Shu

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DS90UB947-Q1: There is a problem with the DS90UB947 stringer