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ADUCM360 Recommended for New Designs
The ADuCM360 is a fully integrated, 3.9 kSPS, 24-bit data acquisition system that incorporates dual high performance, multichannel sigma-delta (S-?) analog...
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ADUCM360 on Analog.com

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AduCM360 ADC conversion rate



		

			

									
					    johnnybravo
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 17, 2016 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			

    Hi,
    
 
    I have a problem with AduCM360 ADC conversion rate. I have changed FLT settings, to obtain the best conversion rate, but I cannot get under 2ms. The 2 ms duration is  too much for my application. What settings should I use to get fADC=3906 Hz?
    
 
    The adc config is : Internal reference, continuous conversion
    
 
    Looking into table 16 and 17 in UG, I see that to obtain the best rate, i should configure the filters like lines: 1,2,6,7
    
 
    The main difference that i see is the settling time, that is the best for line 1 in Table 16. Still, I can't get under 2ms per conversion.
    
 
    Please help!
    
 
    Thank you!
    
 
    Ionut
    
									
			        
		
    

				
						
        

    
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                 microcontrollers
                
                                                    
                 aduc cortex m3
                
                                                    
                 Precision Microcontrollers
                
                                                    
                 aducm360
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jun 17, 2016 5:43 AM
            
            
					
      
	
      

		
		
      
					
      Hi Ionut,
      
 
      I just did a calculation in my head there and with 3.9kHz, the settling time is 3 conversions which works out at 0.768 ms, Also note at the bottom of table 16 there's a further delay of 0.256 ms every time you change channels because the ADC is restarted, so that gives you the 1.024ms.
      
 
      
 
      Is the ~1ms good enough? You have 2 ADCs so that's effectively half of it as you can do 2 channels at once.
      
 
      How many channels do you need to sample and in what time?
      
 
      Can you do a few samples and then change channels so then you effectively gather more samples in less overall time?
      
 
      Regards,
      
 
      Alex
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jun 17, 2016 5:43 AM
            
            
					
      
	
      

		
		
      
					
      Hi Ionut,
      
 
      I just did a calculation in my head there and with 3.9kHz, the settling time is 3 conversions which works out at 0.768 ms, Also note at the bottom of table 16 there's a further delay of 0.256 ms every time you change channels because the ADC is restarted, so that gives you the 1.024ms.
      
 
      
 
      Is the ~1ms good enough? You have 2 ADCs so that's effectively half of it as you can do 2 channels at once.
      
 
      How many channels do you need to sample and in what time?
      
 
      Can you do a few samples and then change channels so then you effectively gather more samples in less overall time?
      
 
      Regards,
      
 
      Alex
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
				
						
				
				
		
		
      
			
		
      
	
      

      

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