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LTC2248 Production
The LTC2248/LTC2247/LTC2246 are 14-bit 65Msps/40Msps/25Msps, low power 3V A/D converters designed for digitizing high frequency, wide dynamic range signals...
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LTC2248 on Analog.com

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Input Clock LTC2248



		

			

									
					    LRoque289
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Apr 18, 2019 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi guy, I'm starting to develop a new project, and I want to use the LTC2248 High speed ADC with a microcontroller to read out the ADC conversion, my question is about the input clock. Can I use the microcontroller PWM output pin to generate the input clock? And how about the SNR in this case? 
    Or I need another input source clock for the ADC? What do you recommend?
    

    

    Thank you
    

    

    Luiz Roque
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on Apr 30, 2019 9:05 PM
            
            
					
      
	
      

		
		
      
					
      What sample rate are you planning on using?  In all likelihood the micro-controller will not be fast enough, or have the jitter performance required for the LTC2248.  For a high speed ADC an FPGA is usually used to collect the data and depending on clock requirements and input frequency, a clock can be used from an FPGA.  Typically a low jitter source like a AD9510 or VCXO is used for the clock of an ADC.  
      

      

      Give me some more information about your application and we can have a better discussion. 
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
			                            
                        
                on Apr 30, 2019 9:05 PM
            
            
					
      
	
      

		
		
      
					
      What sample rate are you planning on using?  In all likelihood the micro-controller will not be fast enough, or have the jitter performance required for the LTC2248.  For a high speed ADC an FPGA is usually used to collect the data and depending on clock requirements and input frequency, a clock can be used from an FPGA.  Typically a low jitter source like a AD9510 or VCXO is used for the clock of an ADC.  
      

      

      Give me some more information about your application and we can have a better discussion. 
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
				
						
				
				
		
		
      
			
		
      
	
      

      

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