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AD8139 Not Working. I need help



		

			

									
					    sschekall
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Feb 24, 2011 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I am using the AD8139 in the as shown in the attached PDF.
    
 
    Spice simulations work fine. But On the bench using +-5V supplys,  AD8138 outputs Nothing.
    
 
    What did I do wrong.
    
 
    Stan Schekall a783239d66076ba983835f6e0157fe05.pdf
    
								
    

				
							osc_5MHZ.pdf
					
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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                on Mar 4, 2011 7:32 AM
            
            
					
        
	
        

		
		
        
					
        John 
        
 
          
        
 
        It's a Legacy design. 
        
 
          
        
 
        Earlier Versions of the design used AD8138, Same configuration, and
        
 
        worked much better that expected.  Except for Temp > 100C
        
 
          
        
 
        Current design is an attempt to work at much higher Temp. Simply replace
        
 
        AD8138 with AD8139 no problem. 
        
 
          
        
 
        But AD8139 does not work. I was trying to avoid a costly re-design. 
        
 
          
        
 
          
        
 
        Stan
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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													0
							
			
				
									
							        
			
			
			
          
            
			                            
                        
                on Mar 4, 2011 7:32 AM
            
            
					
          
	
          

		
		
          
					
          John 
          
 
            
          
 
          It's a Legacy design. 
          
 
            
          
 
          Earlier Versions of the design used AD8138, Same configuration, and
          
 
          worked much better that expected.  Except for Temp > 100C
          
 
            
          
 
          Current design is an attempt to work at much higher Temp. Simply replace
          
 
          AD8138 with AD8139 no problem. 
          
 
            
          
 
          But AD8139 does not work. I was trying to avoid a costly re-design. 
          
 
            
          
 
            
          
 
          Stan
          
			
          

		
		
		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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