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LT6370 Right Leg Drive



		

			

									
						Kitong-Ha
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Mar 7, 2022 
				
			
			
		


				
		

		    		    
		    
		    	
			
Hello,


is the LT6370 suitable for providing a signal to a right leg drive circuit by splitting its RG into 2 resistors and using the signal at the center tap for the RLD circuit?


 


Thanks, 
Kitong

								


				
				
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	

		
	















	

	

					



			


				
	









	
    
	

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                on Mar 7, 2022 5:04 PM
            
            
					
    
	
    

		
		
    
					
    Hi Kitong,
    

    LT6370 is suitable for the Right Leg Drive (RLD) circuit that you're asking about. LT1168 datasheet (Figure 8) shows a dual supply implementation. LT6370 can be similarly used.
    

    The part I'm not sure about is that you're doing a single-supply implementation and the RLD electrode will be at 2.5V DC. I don't know if medical instrumentations allow a DC supply voltage to be applied to the body or not?
    

    Regards,
    

    Hooman
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
						
						
				
				
		
		
    
			
		
    
	
    

    

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                on Mar 8, 2022 7:49 AM
            
            
												
						in reply to Hooman
					
									
    
	
    

		
		
    
					
    Thank you Hooman, that's good to know. To your question: In medical instrumentation it is necessary to isolate the application parts to earth ground. In doing so no risk occurs by using single supply
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

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