• State Not Answered
  • Replies 2 replies
  • Subscribers 1344 subscribers
  • Views 234 views
  • Users 0 members are here
Options
Related 

        

            Post
             Go back to editing
        

    

    


    

    









		











	
	
			
	
			
		
	
	
		

		
AD8622 spice model output current at zero input



		

			

									
						slmperl
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Nov 12, 2020 
				
			
			
		


				
		

		    		    
		    
		    	
			
Hello,


My test circuit is very simple: non inverter amp, gain 2, 500 ohms resistors .Input is 1uV(for test).I measured Vout ~-1mV .The input bias current was measured to be ~300p, but the output current  was ~1.2uA, so it is the reason to the -1mV output.


Is it a real fact of the component or only a problem of the model? 

								


				
				
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	










	

	

					



			








	
	
	
	



Parents
	
    
	

  • 
	
    



	
		
	
	



    
	
    
		
    
							
					
    
		
    
			
													0
							
			
				
									
							        
            
                                                                                                        
      
                            
    • 
                                 Analog Employees 
                                
                            
      • 
                        
     
                                                           			
			                            
                        
                on Nov 13, 2020 5:29 AM
            
            
					
    
	
    

		
		
    
					
    Hi,
    

    Can you attach your ltspice circuit here?
    

    Thanks.
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

    • 

	

  • 
	
    



	
		
	
	



    
	
    
		
    
							
					
    
		
    
			
													0
							
			
				
									
							        
            
                                    			
			                            
                        
                on Nov 18, 2020 6:13 AM
            
            
												
						in reply to ADIApproved
					
									
    
	
    

		
		
    
					
    Here.I didn't find option to insert a file- so here is the asc file as a text, save it as a file with a some name.
    

    Version 4
    SHEET 1 1772 680
    WIRE -304 -64 -320 -64
    WIRE -128 -64 -160 -64
    WIRE -320 -32 -320 -64
    WIRE -160 -32 -160 -64
    WIRE -128 192 -192 192
    WIRE -16 192 -48 192
    WIRE -128 320 -128 288
    WIRE -304 336 -336 336
    WIRE -192 336 -192 192
    WIRE -192 336 -224 336
    WIRE -160 336 -192 336
    WIRE -336 352 -336 336
    WIRE -16 352 -16 192
    WIRE -16 352 -96 352
    WIRE 32 352 -16 352
    WIRE -528 368 -592 368
    WIRE -464 368 -528 368
    WIRE -160 368 -384 368
    WIRE -592 400 -592 368
    WIRE -128 416 -128 384
    WIRE -592 560 -592 480
    FLAG -320 48 0
    FLAG -160 48 0
    FLAG -304 -64 VDD
    FLAG -128 -64 VEE
    FLAG -592 560 0
    FLAG -128 288 VDD
    FLAG -128 416 VEE
    FLAG -528 368 VIN
    FLAG -336 352 0
    FLAG 32 352 out
    SYMBOL voltage -320 -48 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    WINDOW 0 -68 46 Left 2
    WINDOW 3 -109 131 Left 2
    SYMATTR InstName V1
    SYMATTR Value PWL(0 0 +10u 6)
    SYMBOL voltage -160 -48 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    WINDOW 0 -70 50 Left 2
    WINDOW 3 -42 129 Left 2
    SYMATTR InstName V2
    SYMATTR Value PWL(0 0 +10u -6)
    SYMBOL res -32 176 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R1
    SYMATTR Value 500
    SYMBOL res -208 320 R90
    WINDOW 0 -38 56 VBottom 2
    WINDOW 3 -37 54 VTop 2
    SYMATTR InstName R2
    SYMATTR Value 500
    SYMBOL voltage -592 384 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V3
    SYMATTR Value 1µV
    SYMBOL Opamps\\AD8624 -128 288 R0
    SYMATTR InstName U1
    SYMBOL res -368 352 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R10
    SYMATTR Value 5k
    TEXT -272 616 Left 2 !.tran 1m startup
    TEXT -264 640 Left 2 !.option noopiter
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

    • 

	




Reply

    


  • 
	
    



	
		
	
	



    
	
    
		
    
							
					
    
		
    
			
													0
							
			
				
									
							        
            
                                    			
			                            
                        
                on Nov 18, 2020 6:13 AM
            
            
												
						in reply to ADIApproved
					
									
    
	
    

		
		
    
					
    Here.I didn't find option to insert a file- so here is the asc file as a text, save it as a file with a some name.
    

    Version 4
    SHEET 1 1772 680
    WIRE -304 -64 -320 -64
    WIRE -128 -64 -160 -64
    WIRE -320 -32 -320 -64
    WIRE -160 -32 -160 -64
    WIRE -128 192 -192 192
    WIRE -16 192 -48 192
    WIRE -128 320 -128 288
    WIRE -304 336 -336 336
    WIRE -192 336 -192 192
    WIRE -192 336 -224 336
    WIRE -160 336 -192 336
    WIRE -336 352 -336 336
    WIRE -16 352 -16 192
    WIRE -16 352 -96 352
    WIRE 32 352 -16 352
    WIRE -528 368 -592 368
    WIRE -464 368 -528 368
    WIRE -160 368 -384 368
    WIRE -592 400 -592 368
    WIRE -128 416 -128 384
    WIRE -592 560 -592 480
    FLAG -320 48 0
    FLAG -160 48 0
    FLAG -304 -64 VDD
    FLAG -128 -64 VEE
    FLAG -592 560 0
    FLAG -128 288 VDD
    FLAG -128 416 VEE
    FLAG -528 368 VIN
    FLAG -336 352 0
    FLAG 32 352 out
    SYMBOL voltage -320 -48 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    WINDOW 0 -68 46 Left 2
    WINDOW 3 -109 131 Left 2
    SYMATTR InstName V1
    SYMATTR Value PWL(0 0 +10u 6)
    SYMBOL voltage -160 -48 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    WINDOW 0 -70 50 Left 2
    WINDOW 3 -42 129 Left 2
    SYMATTR InstName V2
    SYMATTR Value PWL(0 0 +10u -6)
    SYMBOL res -32 176 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R1
    SYMATTR Value 500
    SYMBOL res -208 320 R90
    WINDOW 0 -38 56 VBottom 2
    WINDOW 3 -37 54 VTop 2
    SYMATTR InstName R2
    SYMATTR Value 500
    SYMBOL voltage -592 384 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V3
    SYMATTR Value 1µV
    SYMBOL Opamps\\AD8624 -128 288 R0
    SYMATTR InstName U1
    SYMBOL res -368 352 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R10
    SYMATTR Value 5k
    TEXT -272 616 Left 2 !.tran 1m startup
    TEXT -264 640 Left 2 !.option noopiter
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

    • 





Children
	
No Data