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AD7656输入管脚的直流偏置问题



		

			

									
					    fayege
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 12, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    AD7656输入管脚有-1.7V左右的偏置（前级电路已经完全断开），AD7656的VDD与AVCC共电压为4.98V，VSS为-4.98V。请教：1.VDD/VSS没有达到±5V是否有影响 2.输入偏置为0可能是什么原因？