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AD7794 Bias AIN4



		

			

									
						buerni
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Dec 14, 2021 
				
			
			
		


				
		

		    		    
		    
		    	
			
Hello!




I have a question regarding the AD7794-B. The 400nA/V Typ input bias current in ref 1 is too high for my application.


This is why I had the idea to use AIN4 as my reference input (REF2), as this is an analog input channel and only has 1nA/V Typ in Buffered Mode, according to the data sheet.


My question is: if I use AIN4 as a reference input, does it really have 1nA/V Typ (Analog Input Current) or does it count as an Reference Input and also have 400nA/V Typ.



Thanks!
buerni