Products Mentioned

ADN4624 Recommended for New Designs
The ADN4622/ADN4624 are quad-channel, signal isolated, low-voltage differential signaling (LVDS) buffers that operate at up to 2.5 Gbps with very low jitter...
Datasheet
ADN4624 on Analog.com

ADN4620 Recommended for New Designs
The ADN4620/ADN4621 are dual-channel, signal isolated, low voltage differential signaling (LVDS) buffers that operate at up to 2.5 Gbps with very low jitter...
Datasheet
ADN4620 on Analog.com

ADN4650 Production
The ADN4650/ADN4651/ADN46521 are signal isolated, low voltage differential signaling (LVDS) buffers that operate at up to 600 Mbps with very low jitter...
Datasheet
ADN4650 on Analog.com

Thread Details

  • State Verified Answer
  • Replies 4 replies
  • Subscribers 35 subscribers
  • Views 1659 views
  • Users 0 members are here
Related Content

        

            Post
             Go back to editing
        

    

    


    

    









		


















	
	
			
	
			
		
	
	
		

	    
	    
	    		
AD LVDS isolators and their working supply and IO voltages

		
	
				

			

									
					    Divodella
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Apr 3, 2024 
				
			
			
		

		
		                    	    

        	    
Thread Summary

                The user is seeking clarification on using ADN462X and ADN465X LVDS isolators with 1.8V differential signals in a medical application. The final answer confirms that LVDS levels are independent of supply voltage, and the common mode voltage is 1.2V, making the isolators compatible with 1.8V differential signals. The user's Kria 24 SOM by AMD is confirmed to be LVDS compliant, and the ADN4650 can be used with 1.8V differential signals on its IOs.
                        	    

                
                     AI Generated Content
                
    	    

             
				
        		

		    
		    		    

		      		            		        
Category: Hardware

    		        		            		    
Product Number:  ADN4620  

    		        		    		    

		    		    
		    			

			    
Hi,


(I am a LVDS newbie) I am eyeing medical LVDS isolators (Creepage and clearance > 8.3mm) to perform parallel data transimissions (Probably 100MHz per LVDS line, I am after EMC benefits, not so much speeds) between two FPGAs isolated from one another. One of my FPGAs is limited to have 1.8V differential, HP or high performance IOs, hence I am limited to LVDS18.


Looking at the "ADN462X" and "ADN465X" LVDS isolators, I can't seem to understand the relationship between the supply and the IO supply voltages. For example, ADN4624 has ONLY VDD1 and VDD2 that can take separate 1.8V supply voltages for each of the isolated sides, but then if I feed LVDS1V8 signals to the ADN4624, do I get LVDS1V8 as an output? the data sheet recommends IO signal voltages to be 3 - 3.6V. It gets complicated when we discuss the ADN4620, which not only has VDD1 and VDD2, but also VIO1 and VIO2. VIO1 and VIO2 both got a recommended voltages of 3.3V, does this mean I can only perform LVDS3V3? if I do supply the 3.3V VIO voltages for the ADN4620 and I use LVDS1V8 in the input stage, do I get LVDS1.8 as an output? I just want a solution to provide and receive LVDS1V8 on either ends of the isolation chips. 




Many thanks.

			

			
									
		                             
                        

    

                                            
                 adn4650
                
                                                    
                 ADN4624
                
                                                    
                 hardware
                
                                                    
                 Digital Isolation Technology
                
                                                    
                 Interface Transceivers & Isolators
                
                                        
                                            
                
                
                                        
                                            
                
                
                                        
                                            
                
                
                                        
                                            
                
                
                                
                    Show More
            

    
    
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			


				
	









	




	
			








		

		

			
    
				
  • 
					
												
						
						
						
						
						
						
						

																										
						
						

					
					
					
				
    • 
			

		

	








































     



















		        
        

            
Before You Switch

            
        

        

        

            Switching languages will make ADI Explorer unavailable. Resume your session by switching back to English and reopening ADI Explorer.