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LTC6404 input circuit

Dear Sir or Madam 

I am implementing my design with LTC6404-2 , and not sure if the  circuits  will  work well , especially about the input part , where switches are inserted  between  the input resistors (R1,R2)  and feedback resistors(R5 , R6) ,  Besides , are there any issues if I place the R1 ,R2 far away from LTC6404-2 input pins respectively  in my layout design ?

Is the circuit OK?

Thank you in advance  for your advice.


Best regards