We don't yet have wideband amplifiers that cover the full range of the AD9129 (1st and 2nd Nyquist). What is the frequency range you need? There are some options for resistive loading, but they will impact performance and also output power (for example, a low impedance resistive load followed by a min-loss pad to translate to 50 ohms load). We have not done much testing in that area, though, since most applications are RF output signals and don't need to go all the way to DC. Can you give more details about the signals you are trying to create?
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