XRDAN29 Datasheet, PDF (1/2 Pages) Exar Corporation – Criteria for Accurate Sampling of Analog Signals

XRDAN29

     
 
Introduction
          
        
           ! 
     "#       
 !      $      
    %    
     !    "%
Choosing a Sampling Frequency
! &$        
  $     ' (   
          
 $    "   %   )
 $        "
 
     "      
      "%     
   !   "    
     $  '
*          % 
 $  " $    
"* +   ,%  *    
    , -.*
* /         " 
 %      )
0  ,     %  "
 )  $ *    $   " 
       (   ) 
"    %   "   
Aperture Uncertainty

     ,*  
)  "%  _{1 } 2   
           -. 
            
!  3  %    %    3
         "  
             
4 "       
      _
2       )  %
"  "%  "     
     5  3

     )    6'
v(t) = V • s in(2• ft)
 )      6,*7  '
dv
dt
=
2• fV
   %        
  _{1 } %    )   '
•v
•t
=
2 • f_MAX V
    %         _
%         '
V_ERR = 2• • V • t_a • f_MAX
 $4 "   " -.  
   - 89  89   ( 
%       -89      
    '
V_ERR
2V
=
1
2^{n+ 1}
 " "'
f_MAX =
1
• • t_a • 2^{n+ 1}
  )    7 : "   -. 
% _ 7 ;       % 
         _{1 } 7<<
1=4    - 89       %
"