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LTM2881 Production
The LTM2881 is a complete galvanically isolated full-duplex RS485/RS422 µModule® (micromodule) transceiver. No external components are required. A single...
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LTM2881 on Analog.com

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LTM2881



		

			

									
					    TANGWENWEN
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 17, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Hardware
    
    		        		        		    		    	
			
    Hello, I'm sorry to bother you. About LTM2881, I met some problems when drawing PCB. How can GND and GND2 be distinguished on PCB board?  Do you have a sample PCB for your reference? 
    
									
			        
		
    

				
						
        

    
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                 LTM2881
                
                                                    
                 hardware
                
                                                    
                 Digital Isolation Technology
                
                                                    
                 Isolated RS-485
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Mar 13, 2023 7:42 PM
            
            
					
      
	
      

		
		
      
					
      Hi, 
      

      The separation of planes is more a PCB layout software question. The LTM2881's GND and GND2 pins would be typically be assigned to different nets which would then become the galvanically separated copper planes in the PCB schematic creation and layout processes.  
      

      The DC1746A User Manual does provide an example of PCB layout for the evaluation board. 
      

      Regards,
      

      Jason
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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													+1
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Mar 13, 2023 7:42 PM
            
            
					
      
	
      

		
		
      
					
      Hi, 
      

      The separation of planes is more a PCB layout software question. The LTM2881's GND and GND2 pins would be typically be assigned to different nets which would then become the galvanically separated copper planes in the PCB schematic creation and layout processes.  
      

      The DC1746A User Manual does provide an example of PCB layout for the evaluation board. 
      

      Regards,
      

      Jason
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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