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LT1819 Production
The LT1818/LT1819 are single/dual wide bandwidth, high slew rate, low noise and distortion operational amplifiers with excellent DC performance. The LT1818...
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LT1819 on Analog.com

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LT1819 is supplied by +-5V when it works with LT2310 as ADC drivers ?



		

			

									
					    Jessie
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Feb 26, 2021 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    the first question:In the reference SCH DC2425A，LT1819 is supplied by +6/-6v. Is it ok if the chip is supplied by +5/-5V? In the datasheet, it says Specifi ed at ±5V, Single 5V Supplies, why it supplied by +6/-6V?
    

    the second question, the following is my design which I modify according to DC2425A.Can you help me to check is it right?
    

      
    

    In my design, I use two single ADC, is it ok if I use one  Precision reference voltage source to supply the pin REFOUT of two ADCS?
    
									
			        
		
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                        
                on Feb 26, 2021 8:07 PM
            
            
					
      
	
      

		
		
      
					
      Hi Jessie:  The LT1819 is specified at +/-5V, and has a PSRR spec'd to +/-5.5V.   +-/6V is a little close to the Abs Max supply total of 12.6V, but as long as the supplies don't overshoot, it should be okay.   If the ADC ref pins are fairly benign, then you should normally be able to provide one reference for both ADC's, but you'll want a lot of bypass and use a plane not just a trace.  But the ADC experts should get back to you on this question.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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                on Mar 5, 2021 4:01 AM
            
            
					
        
	
        

		
		
        
					
        Hi GlenBresebois: The Vcm of the LT1819 in the datasheet is ±4.2V when the VS = ±5V. Is it right  -4.2V<VIN+<4.2V and -4.2V<VIN-<4.2V? 
        

        And the Vcm is displayed in the following picture  when the VS = 5V,0V.Is it right  0.8V<VIN+<4.2V and 0.8V<VIN-<4.2V?
        

         
        

        I don't understand what's the mean of the positive and the negative in the brackets.
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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