OPA692: 1:4 video buffer amplifier request

Hi Jonathan,

what is the exact value of your input signal? What do you mean by "5V"? RMS or Vpp or Vp?

And what do you mean by "1k pull-down resistor"? Just a simple 1k load resistance?

Kai

Hi Kai,

The input signal is a 5V Vp only.

Let me know if we have a better offering.

Regards,

Jonathan 

Well Jonathan

Topologically, your request is making little sense thus far, you are going 1 to 4 then 4 to 1 in the ADI mux. Why?

At an implementation level, assuming something like this will emerge, you always need to consider the input C of those mux's, that will lead to a series iso R to the mux, with some insertion loss. Then, what is on the other side of the mux, 100ohm load will give a different need than 1Mohm load. Here are those mux cap specs. 

Hello Jonathan, 

Just to confirm each load is set to 1kohms here rather than the 75-ohms shown in the first image, correct? What supplies are being used here?

Best,

Hasan Babiker

Hi Hasan and Michael,

Yes, 1K ohm is being used as the load here. The 1K ohm is used as a soft pull down when there is no signal present on (s1) of ADG5404FBRUZ.
The power supplies they are using for ADG5404FBRUZ  is (+/- ) 5V.
Power supplies for the op-amp can be anything to get the job done.

This is the information I get from the customer.

Please let me know if the above information is enough for us to offer a suitable TI part for the customer.

The customer is okay for 1:2 or 1:3 if there's no available 1:4 solution.

Regards,

Jonathan