How to set LTC5586 ADRF6520 AD9691 Common mode voltages ?

Question

Dear Sir, 
 Our application is Zero-IF. 
 But AD9691 provide common mode voltage 0.85V. 
 I have some questions as below: 
 
 What the common mode voltage for ac-coupled of ADRF6520? 
 May I use AC-coupled connection from LTC5586 to ADRF6520 and from ADRF6520 to AD9691? 
 If I need AC-coupled connection from LTC5586 to ADRF6520 and from ADRF6520 to AD9691. Could you please send me a reference interface connection?

jdobler · Accepted Answer

For the ADRF6520, the input common-mode is set at 1.375V and the output common-mode set at 1.65V. This is whether the output is DC or AC-coupled. There is no mechanism to change these common-mode voltages on the ADRF6520. 
 I would recommend using large valued AC coupling capacitors on the ADRF6520 on its input and output if the stages that are connected cannot accommodate its common-mode voltage. Be sure to size the capacitors values such that the high-pass corner they create is not an appreciable percentage of your signal bandwidth.)

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How to set LTC5586 ADRF6520 AD9691 Common mode voltages ?