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LTC2324-12 Production
The LTC2324-12 is a low noise, high speed quad 12-bit + sign successive approximation register (SAR) ADC with differential inputs and wide input common...
Datasheet
LTC2324-12 on Analog.com

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LTC2324 tCYC  Time between Conversions  Max time



		

			

									
					    llfish
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Sep 5, 2018 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Q:
    

    LTC2324-12 Datasheet Page 5 Line:
    

    tCYC    Time between Conversions            (Note 11)  tCYC = tCNVH + tCONV + tREADOUT   min 0.5us  max 1000us
    

    and Page 6  Note 11:
    

    Note 11: Guaranteed by design, not subject to test.
    

    ----------------------------------------------------------------------------------------------------------------------
    

    So, the minimum Sampling Frequency is 1/1000us = 1KSPS ? If Time between Conversions  is more than 1000us, the adc accuracy will be lost , or something is going wrong?
    

    For application with variable tCYC, for example,  if tcyc sequence  like this : 1s 0.5s 100ms 10us  10s 1us 2ms 1us 1us 1us 5s........  , does the adc results will be right?
    

    Thanks.
    

    Does this can be applied for LTC2325 LTC2320 LTC2351  LTC2357 ...series?
    

    Thanks.
    

    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 LTC2324
                
                                                    
                 Simultaneous Sampling A/D Converters
                
                                                    
                 Precision A/D Converters
                
                                                    
                 LTC2324-12
                
                                                    
                 LTC2320
                
                                        
                                            
                
                
                                
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Sep 5, 2018 11:22 AM
            
            
					
      
	
      

		
		
      
					
      If the time between conversions exceeds the maximum specified, there will be a gradual loss of accuracy.  This also applies to parts such as the LTC2325, etc.  Let me know if you have a specific concern or time between conversions and I can help you further.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
        
            
						
                            
            
            				
            
                on Sep 5, 2018 11:34 PM
            
            
												
						in reply to ADIApproved
					
									
        
	
        

		
		
        
					
        I see.
        

        This is the Application:
        

        DPSS ( Diode-pumped solid-state laser ). Repetition rates :0Hz to 100 kHz. 
        

        The adc is used to monitor the peak current of  pulsed pumped diodes for DPSS test in its production. Repetition rate is variable, so the time between conversions is variable. When one pulse is detected, the adc works at 2Msps for several samples, then the sample values can be averaged. When one pulse is gone , there will be a long time before next pulse, maybe 10us to several seconds depending on the repetition rate, so i have a concern on time between conversions.
        

        As a result, If I use this serial adcs, I must add conversions in the long idle time or set the adc into power saving mode.
        

        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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