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AD7739 转换输出的电压值比模拟输入的电压小一个25mV

		
	
				

			

									
					    redsliu
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 28, 2019 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
     
    

    上图是原理设计图，用高精度万用表测量出转换输出的电压值比模拟输入的电压小一个25mV，通道校准也做过同样是一样的？请专家帮忙解答下；谢谢！
    
			
    
			
									
		                             
                        

    
    
                                            
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