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AD7606 Production
The AD7606/AD7606-6/AD7606-4 are 16-bit, simultaneous sampling, analog-to-digital data acquisition systems (DAS) with eight, six, and four channels, respectively...
Datasheet
AD7606 on Analog.com

AD7606B Recommended for New Designs
The AD7606B is a 16-bit, simultaneous sampling, analog-to-digital data acquisition system (DAS) with eight channels, each channel containing analog input...
Datasheet
AD7606B on Analog.com

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FAQ: How to calibrate the gain error introduced by a resistor on the AD7606B's front end?

		
	
				

			

									
					    Lluis
					
							

            
            			
				
									
											
			
			
				
  •  Analog Employees  

			
			
			    	
			                    
                
				                on May 17, 2019 
				
			
			
		

		
		                     
				
        		

		    
		    		    
		    			

			    
I have a series resistor in front of my analog inputs that causes a gain error, how can I calibrate this gain error off with AD7606B?

			

			
									
		                             
                        

    

                                            
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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on May 17, 2019 8:20 AM
            
            
						
			            		
    
		
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    Having a series resistor in front of the ADC leads to having a system gain error. This system gain could be calibrated on the backend, however the AD7606B provides a feature to compensate this error by just programming the resistor value used on the front-end (up to 65kOhm). This gain calibration register reduces the burden of doing this task on the backend, and achieves it more precisely because the it uses the actual, factory trimmed, input impedance on each device. See A.N. 2011 for further details on AD7606B gain calibration feature, and simulate it through the Software model available on the AD7606B product page
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on May 17, 2019 8:20 AM
            
            
						
			            		
    
		
										0
					
	
    

		
		
    
		
    
                                
                                                            
    
					
    Having a series resistor in front of the ADC leads to having a system gain error. This system gain could be calibrated on the backend, however the AD7606B provides a feature to compensate this error by just programming the resistor value used on the front-end (up to 65kOhm). This gain calibration register reduces the burden of doing this task on the backend, and achieves it more precisely because the it uses the actual, factory trimmed, input impedance on each device. See A.N. 2011 for further details on AD7606B gain calibration feature, and simulate it through the Software model available on the AD7606B product page
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

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