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AD8003 Production
The AD8003 is a triple ultrahigh speed current feedback amplifier. Using ADI’s proprietary eXtra Fast Complementary Bipolar (XFCB) process, the AD8003...
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AD8003 on Analog.com

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About supply current of AD8003

		
	
				

			

									
					    shaoy
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Aug 27, 2024 
				
			
			
		

		
		                     
				
        		

		    
		    		    

		      		            		        
Category: Hardware

    		        		            		    
Product Number:  AD8003  

    		        		    		    

		    		    
		    			

			    
 
































When using the configuration shown in the figure, with Rf set at 430 ohms and the Vin terminal floating, the current for dual power supply is around 9 mA, and there is no oscillation in Vo. However, when Rg, which is 7.5 ohms, is connected, the dual power supply current rises to 150 mA, and Vo exhibits sinusoidal oscillations. What could be causing this?













			

			
									
		                             
                        

    

                                            
                 Operational Amplifiers (Op Amps)
                
                                                    
                 hardware
                
                                                    
                 amplifier
                
                                                    
                 ad8003
                
                                                    
                 Low Noise Op Amps (= 10nV/vHz)
                
                                
            

    
    
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			


				
	









	
    
	

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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Aug 29, 2024 3:37 AM
            
            
						
			            		
    
		
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    Hello Shaoy,
    

    Thanks for reaching out. What is your supply voltage, input voltage and load resistor? An Rf of 430ohms and Rg of 7.5ohms will give a gain of -57 which will amplify your output and increase the current on the load resistor which could possibly cause a high current pulled from the supply.
    


    Best Regards,
    Kenneth
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

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