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SNR of AD9695 DC-COUPLE  is much lower than AC-COUPLE?


		

			

									
						ascending123
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Jan 25, 2023 
				
			
			
		


				
		

			
SNR of AD9695 DC-COUPLE  is much lower than AC-COUPLE? 


i have configured the regs of ad9695 in dc-coupled way and connect the circuit 's vcm in dc-coupled way,but the snr seems much lower than ac-coupled ,what's wrong ?