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ADUM1400隔离没有输出

		
	
				

			

									
					    Uop
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 25, 2017 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    供电用的混合3.3,5V供电，供电正常，输入端的信号位5V，频率在2MHZ，带宽在ADUM1400BRZ10M范围内，但是经过ADUM1400隔离之后就没有信号输出（也不是完全没有，大概有0.X的样子，也不是0V），电路图如下所示，求帮忙解答一下，谢谢！
    
			
    
			
									
		                             
                        

    
    
                                            
                 Digital Isolation Technology
                
                                                    
                 adum1400
                
                                                    
                 Standard Digital Isolators