how to design IF filter between ADL5801 and AD8375

hello,

I want to design a IF receiver board, the RF input  from 400Mhz to 900Mhz, 40Mhz bandwidth,tuneable,   i want to get 144Mhz IF signal,

I select following chips

ADL5801         downconvertor mixter

ADF4350         LO

AD8375           IF amp

who can tell me how to design the impedance match between ADL5801 and the IF filter, and between IF filter and AD8375 amplifier?

anyone can give me the filter component value ? with schmatic is better.  i want to get enough stopband attenuation(>= 40db)

and passband flatness(<= 0.5db)
  • 0
    •  Analog Employees 
    on Apr 25, 2012 1:51 AM

    I would suggest using the filter design tool in ADS (or a comparable product) for this exercse. The zip file attached with this message provides an example of a 'Maximally flat' filter network designed using some of the system specifications. The file includes a screen capture of the design parameters specified, filter network and simulation results. This should serve as a good starting point for the final design.

    If signal distortion in the lower frequencies is not a concern, a low pass filter could also be an alternative. This would simplify the filter design process and reduce the component count.

    adl5801_ad8375_iffilter_example.zip