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AD2437 Production
The AD2437 A2B® transceiver provides a multichannel, I2S/TDM link over distances of up to 30 m between nodes. It embeds bidirectional synchronous pulse...
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AD2437 on Analog.com

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A2B max number of slots

		
	
				

			

									
					    StevenNob
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Apr 15, 2026 
				
			
			
		

		
		                     
				
        		

		    
		    		    

		      		            		        
Category: Datasheet/Specs

    		        		            		    
Product Number:  AD2437  

    		        		    		    

		    		    
		    			

			    
Hi,
I want to clear one specs bout A2B. How many slots can the A2B AD2437 handle at maximum?


I’m trying to reconcile my bandwidth calculations with what is stated in the datasheet, but they don’t seem to match.


Based on my calculations, the maximum number of total slots I can achieve is:


    

  • 51 slots when using 16-bit audio
    • 

  • 32 slots when using 24-bit audio
    • 

  • 27 slots when using 32-bit audio
    • 



However, the datasheet seems to suggest that it is possible to use 32 slots in the downstream direction and 32 slots in the upstream direction simultaneously.


Am I missing something in how the bandwidth is allocated, or are the datasheet and product documentation somewhat unclear on this point?
I attached some examples from your website and datasheet/TRM.
 
From:
https://www.analog.com/en/resources/analog-dialogue/articles/a2b-enables-new-more-complex-data-and-audio-transport-systems.html#:~:text=A2B,stacks
 
The last one is from TRM of AD2437. 
Thanks in advance, 


Steven

			

			
									
		                             
                        

    

                                            
                 Datasheet/Specs
                
                                                    
                 AD2437
                
                                                    
                 Interface Transceivers & Isolators
                
                                
            

    
    
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			


				
	









	
    
	

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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on May 25, 2026 7:01 AM
            
            
						
			            		
    
		
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    Hi  
    

    The AD2437 transceiver supports a maximum of 51 slots at 16‑bit word length (or 32 slots at 24‑bit). However, the register model only allows configuration of up to 32 slots in each direction (downstream and upstream). This means you cannot exceed 32 slots per direction, and the aggregate slot usage is further constrained by the overall bus bandwidth.
    

    In practice, the usable number of slots depends not only on word length but also on system factors such as the number of nodes, cable length, and slot width. Because of these bandwidth constraints, the effective slot count may be lower than the theoretical maximum.
    

    We recommend using SigmaStudio+ to configure your network and calculate the actual slot allocation. The tool enforces both the register limits and the bandwidth cap, so you can see exactly how many slots are valid for your design.
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

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