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LTC2986 Recommended for New Designs
The LTC2986 measures a wide variety of temperature sensors and digitally outputs the result, in °C or °F, with 0.1°C accuracy and 0.001°C resolution...
Datasheet
LTC2986 on Analog.com

Associated Drivers

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LTC2986 Direct ADC Measurements

		            
		

			

									
					    Kazu
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 30, 2018 
				
			
			
		
    
		
     
				
		
    
		    		    
		    
		    	
			
    Hi,
    

    I have a couple of questons about the direct ADC mode of LTC2986. Please take care of this case.
    

    - What is the maximum sampling  speed of internal 24 bit ADCs in the direct ADC mode?
    

    - How can I know conversion start and finish in the direct ADC mode? I can know those by reading any register value?
    

    

    Regards,
    

    Kazu
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 Digital Temperature Sensors
                
                                                    
                 Integrated/Special Purpose A/D Converters
                
                                                    
                 LTC2986
                
                                
            
    
    
    

		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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													+1
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 8, 2018 4:55 AM
            
                                    
					
      
	
      

		
		
      
					
      Hi Kazu, 
      

          The maximum sampling speed of the LTC2986 is fixed for power line rejection. It is about 6Hz when in the default 50/60Hz mode. It will be slightly faster when set for 50Hz rejection only, and slightly slower for 60Hz only. Please see the tables in page 4 of the datasheet as well as page 75 for 2 and 3- cycles modes. Direct ADC is always a 2-cycle mode. 
      

          Conversion start/finish can be monitored by watching the INT signal (pin), as well as watching the Command status register (address 0x000) which will change from 0x80 during a conversion (start bit = 1, done bit = 0) to 0x40 when finished (start bit = 0, done bit = 1). Please see page 17-21 of the LTC2986 DS for more info.
      

      -Logan
      

          
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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