Tool/software:
I would like to use a single supply analogue switch as part of a front end for a clock signal timing analyser. The key trait I am trying to create is a high fidelity representation of the clock signal zero crossing time on the output of a clock buffer (with suitable AC coupling and biasing). To achieve this, I am using the fastest propagation time analogue switch and clock buffer suitable.
I would like to provide separate voltage regulator to these parts but because one channel of the analogue switch will receive negative voltages from a sine clock input, I plan to shift its ground to -1.65 V. With +3.3V on the analogue switch's VDD pin, this should maintain the recommended supply voltage limits. I would like a low noise supply for these two voltage rails, and would like to get TI opinion on whether this is a good application for the LM27762 or if there is a better approach.
Here is a basic scheme of what I plan to do, without resistor/capacitor values selected or power decoupling capacitors shown.
The simplified scheme showing the analogue switch represented by basic SPDT switches is here, to better visualise the intended signal path.
