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差分放大采集，输出电压存不对

		
	
				

			

									
					    HongKeil
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Dec 1, 2025 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user encountered a -1.5V output from an AD620-based differential circuit when no current was present, due to the AD620's inability to support rail-to-rail output, especially when -VS is grounded, preventing the output from reaching near 0V.
                        	    
    
                
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    Category: Hardware
    
    		        		            		    
    Product Number:  AD620 
    
    		        		    		    
    
		    		    
		    			
    
			    
     
    

    我通过AD620构建的差分电路，采集U18分流器电压，在没有电流的情况下，AD620输出电压有-1.5V,这是什么原因；
    
			
    
			
									
		                             
                        

    
    
                                            
                 amplifiers
                
                                                    
                 hardware
                
                                                    
                 Instrumentation Amplifiers
                
                                                    
                 ad620