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AD7671 Production
The AD7671 is a 16-bit, 1 MSPS, charge redistribution SAR, analog-to-digital converter that operates from a single 5 V power supply. It contains a high...
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AD7671 on Analog.com

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AD7671 Output has step



		

			

									
					    daydayzhq26
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Dec 13, 2017 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    
 
     When I use AD7671 to convert signal (1Hz to 1kHz), I found steps in the output.
    
 
    Attachment figure 1 is the waveform, where green line is input of AD7671;yellow line is the output of AD7671 (a DCA output, the DAC operated well).
    
									
			        
		
    

							
    
				
				
			
    
					
						
        

    
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                 Single Channel A/D Converters
                
                                                    
                 Precision A/D Converters
                
                                                    
                 ad7671
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
					
      
	
      

		
		
      
					
      Hi daydayzhq26 ,
      
 
         
      
 
            You mentioned that the yellow line is measured on the DAC. At what throughput rate the was the AD7671 ? and what is the rate of the DAC capture? What do you mean by DCA? If it is okay to share the schematic of your application so we may have a better understanding of the problem.
      
 
      Regards,
      
 
      Jonathan
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
					
      
	
      

		
		
      
					
      Hi daydayzhq26 ,
      
 
         
      
 
            You mentioned that the yellow line is measured on the DAC. At what throughput rate the was the AD7671 ? and what is the rate of the DAC capture? What do you mean by DCA? If it is okay to share the schematic of your application so we may have a better understanding of the problem.
      
 
      Regards,
      
 
      Jonathan
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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