What is the output impedance of the AD8347s baseband amplifiers? I thought I read somewhere that it had a relatively high output impedance, but I cannot find where I read it. Also, what is the input referred noise? The reason I ask is because if it is a relatively high impedance then I need to find a suitable differential amplifier to act as a buffer. However, most of the differential amplifier datasheets I've seen use gain and feedback resistors of a few hundred ohms and I think I would need to use much higher resistor values. Any recommendations on a diff-amp that can use higher gain and feedback resistors?