DS90UB940N-Q1: FPD-Link Switches

Zhi Li

Prodigy 10 points

Part Number: DS90UB940N-Q1

Tool/software:

Does TI provide any chips that support switches of FPD-Link that includes Power-over-Coax?

6 months ago

0 Jack Scherlag 6 months ago

TI__Mastermind 34235 points

Hello,

Please note that the FPD-Link deserializer you have included in the title has not been validated with PoC. Only FPD-Link ICs in the camera/ADAS portfolio have been validated with PoC.

For a typical PoC voltage of 9v, there is no existing high-speed mux that can handle that level of DC bias. TI's high-speed muxes can typically handle up to 5v on the signal path. To realize a muxing solution with PoC, the mux will be placed after the AC coupling caps to remove the DC bias from the signal.

There is an app note covering muxing with FPD-Link ADAS parts. See the app note link below.

https://www.ti.com/lit/wp/snla416a/snla416a.pdf?ts=1725467329417&ref_url=https%253A%252F%252F

Best,

Jack

0 Zhi Li 6 months ago in reply to Jack Scherlag

Prodigy 10 points

Thanks Jack. This is super helpful.

I did not quite get your answer on adding the AC coupling caps. In the datasheet, Mux is added between deserializer and the serializer (Camera). If I add AC coupling on either side of the Mux then the camera will not get the power over the coax anymore right.

+1 Jack Scherlag 6 months ago in reply to Zhi Li

TI__Mastermind 34235 points

See the attached diagram for a simplified version PoC in a muxed FPD-Link system.

Interface

Interface forum

DS90UB940N-Q1: FPD-Link Switches