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about AD9739 output amplitude

Category: Hardware

In datasheet, output of ad9739 is connected to TC1-33-75G2+, using 90Ω to GND in figure 65. Now,i want to amplify the amplitude of output, can i use bigger resistor here, i.e, 100Ω,150Ω?

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  • FormerMember
    0 FormerMember

Hi Licunxu,

thanks for the question. I don't recommend changing the 90ohm. (70ohm // (90+90)ohm ) = 50ohm, this is the impedance driving by the DAC for an optimal match.

If you like to amplify the signal, you could use Figure 67 with RF differential amp

what type of application is that?

Thanks

Adam

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  • FormerMember
    0 FormerMember

Hi Licunxu,

thanks for the question. I don't recommend changing the 90ohm. (70ohm // (90+90)ohm ) = 50ohm, this is the impedance driving by the DAC for an optimal match.

If you like to amplify the signal, you could use Figure 67 with RF differential amp

what type of application is that?

Thanks

Adam

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