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AD8232芯片手册上设计高通滤波截止频率与实际高通滤波截止频率不同，AD8232能否实现0.1Hz高通滤波



		

			

									
					    wanghan
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 24, 2021 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
     
    

    测试时使用信号发生器，正极接RA,地接RA端。输入0.1Hz-100Hz幅值2mv正弦信号，0.5Hz时增益大概36dB，根据数据手册0.5Hz增益应该60dB左右。60dB频率范围在10Hz到40Hz左右相差较大。
    

    

    

     
    

    根据芯片手册通带应该是0.5Hz-40Hz
    

    原理图如下：
    

     
    

    
									
			        
		
    

				
						
        

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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