I need to switch a differential analog signal with a common-mode voltage of 3.5 volts (output from an LTC5585 IQ demodulator) with at least 300 MHz of signal bandwidth into various gain stages and bandwidth-limiting filters, 25 to 250 MHz .  The ADG794 seems to fill the bill except that the data sheet says the input voltage level is only 0 to 2.5V, whereas the selection table shows a range of 5.5V.  Will this device work for my application, or is there a better device for this?

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  • Hi tgcoombs,

    I checked the ADG774 and found out that the device is an Nmos only switch thus is has a restricted signal range.

    You might want to check the ADG772, dual 2:1 Mux with 6.7ohms on resistance and has a bandwidth of up to 63MHz. The ADG772 has a Vdd of 3.6V in rail-to-rail operation and so the analog input signal of 3.5V will be accepted.

    Let me know if this helps.

    Best Regards,


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