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Daisy chain issue with AD5415



		

			

									
					    BradP
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 16, 2012 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    If you are using or plan to use the AD5415 12-bit DAC chip in a daisy-chain configuration, you need to read page 20 of the marked up data sheet attached.  If you are using the SDO output of even a single AD5415, then you also need to see the erratum marked up on that same page.
    
								
    

				
							AD5415_a.pdf
					
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                        
                on May 16, 2012 1:42 PM
            
            
					
      
	
      

		
		
      
					
      Hi BradP,
      
 
      Yes, you are right. When the user selects the option of disabling the SDO pin, the daisychain mode is also disabled. This is an issue when the part is in a daisy chain and it is not the first part in the chain. As you explained, the part goes into standalone mode and expects the first SYNC pulse to contain its data, which is not the case.
      
 
      The datasheet will be edited to highlight this, so it will prevent users from spending time on analizing the part's behaviour for this specific conditions.
      
 
      Thanks,
      
 
      Estibaliz
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
				
						
				
				
		
		
      
			
		
      
	
      

      

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