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HMC745 question about input Voltage.

hi ,

i have a HMC745 question about input Voltage.

in differential mode,

If only the following level conditions(spec)  are met ...

Does the level of the input signal matter? How Can Device Judge the Logic?

I Don' t know about Inner Device internal circuit.

ex) VCC 3.3V , Vin : VIH 3.3V VIL 2.3V or VIH 2.8V VIL 2.3V or any contion?

in single input mode,

negative input conneted decap-GNDED, how can i get input level? (+ input)

device is vcc termed, Input signals based on the value of vcc must be sent equally = (vih : vcc+0.5v vil : vcc-0.5v)

is it right? anything else?

PLZ GIVE A TIP.

I Don' t know about Inner Device curcuit...