Products Mentioned

AD7761 Recommended for New Designs
The AD7761 is an 8-channel, simultaneous sampling sigma-delta (S-?) analog-to-digital converter (ADC) with a S-? modulator and digital filter per channel...
Datasheet
AD7761 on Analog.com

AD7768 Recommended for New Designs
The AD7768/AD7768-4 are 8-channel and 4-channel 24-bit, simultaneous sampling, sigma-delta (Σ-Δ) analog-to-digital converters (ADCs) with power scaling...
Datasheet
AD7768 on Analog.com

AD7768-1 Recommended for New Designs
The AD7768-1 is a low power, high performance, Σ-Δ analog-to-digital converter (ADC), with a Σ-Δ modulator and digital filter for precision conversion...
Datasheet
AD7768-1 on Analog.com

AD7768-4 Recommended for New Designs
The AD7768/AD7768-4 are 8-channel and 4-channel 24-bit, simultaneous sampling, sigma-delta (Σ-Δ) analog-to-digital converters (ADCs) with power scaling...
Datasheet
AD7768-4 on Analog.com

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ADC AD7761 is missing in web tool "Precision ADC Driver Tool"

		
	
				

			

									
					    nick21
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 3, 2021 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    Hi,
    

    I need to use the web tool "Precision ADC Driver Tool" to calculate the RC filter for the driver but there is no AD7761. The only one close is AD7768, AD7768-1 and AD7768-4.
    

    Is it ok if I use any of these?
    

    Thanks!
    
			
    
			
									
		                             
                        

    
    
                                            
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                 RC filter
                
                                                    
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      •  Analog Employees  
      •  Super User  
      
            
						
                            
            
            				
            
                on Nov 3, 2021 10:57 PM
            
            
						
			            		
      
		
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      Hi, 
      

      AD7761 is a 16 bit version of AD7768 which is a 24 bit ADC. These parts are from the same family and the majority of behavior is the same. However, you have to consider that they are different in terms of resolution. So whatever noise contributions you get from the system I guess if it is lower than the LSB size of AD7761 then SNR, Dynamic range, etc. would still be limited by the LSB size. So I am not sure if it make sense to use AD7768 from the tool in order to simulate the expected performance of AD7761. But my thinking is that whatever the tool calculates for external RC values should work with AD7761 but like I said the performance would still be limited by the actual resolution.
      

      I will also ask the product apps for these parts and see what his thoughts on this.  
      

      Thanks,
      

      Jellenie
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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    • 
	
      



	
		
	
	



      
	
      
		
      
							
					
      
		
      
		    
		    		    
			
				
									
							        
			
			
			
      •  Analog Employees  
      •  Super User  
      
            
						
                            
            
            				
            
                on Nov 3, 2021 10:57 PM
            
            
						
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      Hi, 
      

      AD7761 is a 16 bit version of AD7768 which is a 24 bit ADC. These parts are from the same family and the majority of behavior is the same. However, you have to consider that they are different in terms of resolution. So whatever noise contributions you get from the system I guess if it is lower than the LSB size of AD7761 then SNR, Dynamic range, etc. would still be limited by the LSB size. So I am not sure if it make sense to use AD7768 from the tool in order to simulate the expected performance of AD7761. But my thinking is that whatever the tool calculates for external RC values should work with AD7761 but like I said the performance would still be limited by the actual resolution.
      

      I will also ask the product apps for these parts and see what his thoughts on this.  
      

      Thanks,
      

      Jellenie
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

      • 


    


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