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ADA4254 Recommended for New Designs
The ADA4254 is a zero drift, high voltage, low power programmable gain instrumentation amplifier (PGIA) designed for process control and industrial applications...
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ADA4254 on Analog.com

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Time/Phase Response of ADA4254 Amplifier

		
	
				

			

									
					    awolfed
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 7, 2025 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  ADA4254  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hello,
    

    

    I am interested in understanding the phase response of the ADA4254 amplifier. In our application, synchronization and timing are very key.
    

    

    In the datasheet, the frequency response plots do not include a plot for phase vs frequency. Does AD have this information? Could AD please provide a plot for phase against frequency at different gain settings?
    

    

    

    Thanks,
    
			
    
			
									    
    
			        
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    				removed false ai content label
    
[edited by: awolfed at 5:04 PM (GMT -4) on 7 Jul 2025]
				
    
						
		                             
                        

    
    
                                            
                 Datasheet/Specs
                
                                                    
                 amplifiers
                
                                                    
                 ADA4254
                
                                                    
                 Instrumentation Amplifiers
                
                                                    
                 phase
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jul 8, 2025 10:29 PM
            
            
						
			            		
      
		
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      Hi  ,
      

      Unfortunately, we do not have the phase response data of ADA4254 in our internal files. Could you share your application?
      

      Regards,
      

      Kristine
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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                on Jul 9, 2025 9:46 AM
            
            
												
						in reply to kristinehoffman
					
										
			            		
        
		
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        The main goal of our application is simultaneous sampling. We are using the AD7768 to do this. Some of the channels on the AD7768 go through an ADA4254 PGA, and some do not. Since we are concerned with ~20ns of time difference between samples of different channels, we would like to understand exactly how much time delay the signal chains with the ADA4254 experience vs without the ADA4254. Also, we are simultaneously sampling not only on the same device, but on separate devices synchronized over GPS time as well. 
        

        This is where the desire to have good time/phase information on the ADA4254 comes from. We could take some empirical measurements, but I would really like to have a max/min expectation.
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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