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LTC6801 Not Recommended for New Designs
The LTC6801 is a multicell battery monitoring IC incorporating a 12-bit ADC, a precision voltage reference, sampled comparator, and a high voltage input...
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LTC6801 on Analog.com

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Maximum number of LTC6801 in a daisy chain

		
	
				

			

									
					    pmoh
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Mar 28, 2023 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  LTC6801 
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hello, 
    I am working on a design with the LTC6801 and there are >10 of these ICs in series. The chip requires up to a 40kHz pulse and each chip is transformer isolated. I am seeing the pulse get distorted after the 6th-7th IC. Is there a maximum number of these chips I can connect in series?

    
			
    
			
									
		                             
                        

    
    
                                            
                 battery monitor
                
                                                    
                 Battery Management System
                
                                                    
                 hardware
                
                                                    
                 bms
                
                                                    
                 LTC6801
                
                                        
                                            
                
                
                                        
                                            
                
                
                                
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                on Mar 28, 2023 5:56 PM
            
            
						
			            		
        
		
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        As a follow-up which might help us come to a solution, is the Frequency Match Detect Circuitry that is internal to the chip dependent on the phase of EIN and SIN? For example, as the number of chips in the daisy chain increase, there bound to be a phase mismatch between EIN and SIN. Does the Frequency Match Detect Circuitry get thrown off by this mismatch?
         
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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