DS90UB948-Q1: Interface forum

songlin he

Hi ,TI team

For 948 VOD swing, test is over 1200mVpp, in below with no LVDS load; if connect LVDS to LCD, add LVDS load, the swing become to 400mVpp.

so i want to know the swing over 1200mVpp is right? But the datasheet setting max only 970mVpp.

over 3 years ago

+1 Ryan Kitto over 3 years ago

TI__Guru 52385 points

Hi Songlin,

What is the value of register 0x4B? This setting has an effect on the swing of the LVDS Output.

Thanks,

Ryan

0 songlin he over 3 years ago in reply to Ryan Kitto

Prodigy 60 points

hi Kitto，

We set 00: Setting 1 - 190mV typical voltage swing (single-ended)

0 Ryan Kitto over 3 years ago in reply to songlin he

TI__Guru 52385 points

Hi Songlin,

The spec in the datasheet specifies the typical swing while there is a load applied to the output (RL = 100 Ohms). As such, the 400mVpp should fit within the spec defined for setting 1.

Seeing as it does, I see no issue with this.

Thanks,

Ryan