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AD8067 Production
The AD8067 FastFET™ amp is a voltage feedback amplifier with FET inputs offering wide bandwidth (54 MHz @ G = +10) and high slew rate (640 V/µs).  The...
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AD8067 on Analog.com

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using AD8067 as inverting amplifier



		

			

									
					    niloyeee147@gmail.com
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 15, 2014 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    
 
    I tried to work with AD8067 operational amplifier as inverting amplifier. My input resistance is 12k ohm and feedback resistance is 10k ohm. Now gain should be less than one. I tried to simulate it in LTspice with spice model of AD8067 from analog device website. I got very weird result. The frequency increased and the output is like a beam. I am attaching the circuit and output curve here. Can anyone please help me to solve this problem? 
    
 
    Thank you.
    
 
    Niloy
    
									
			        
		
    

				
							attachments.zip
							
        

    
    Tags: 
                                            
                 Operational Amplifiers (Op Amps)
                
                                                    
                 amplifiers
                
                                                    
                 ad8067
                
                                                    
                 inverting amplifier
                
                                                    
                 Low Input Bias Current Op Amps (≤100 pA)
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 16, 2014 1:37 PM
            
            
					
      
	
      

		
		
      
					
      Hi Niloy,
      
 
      If I may add on my previous response, the AD8067 is stable at gains > 8. As for your application, i think AD8067 is not the best part for you.
      
 
      Can you share your schematic of your application so that I can assist you better? What are your input requirements if I may know? As what i understand, you want a gain of -0.826? At to what level do you expect your current output will be?
      
 
      Best Regards,
      
 
      Jino
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 16, 2014 1:37 PM
            
            
					
      
	
      

		
		
      
					
      Hi Niloy,
      
 
      If I may add on my previous response, the AD8067 is stable at gains > 8. As for your application, i think AD8067 is not the best part for you.
      
 
      Can you share your schematic of your application so that I can assist you better? What are your input requirements if I may know? As what i understand, you want a gain of -0.826? At to what level do you expect your current output will be?
      
 
      Best Regards,
      
 
      Jino
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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