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ADA4862-3 Production
The ADA4862-3 (triple) is a low cost, high speed, internally fixed G = +2 op amp, which provides excellent overall performance for high definition and...
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ADA4862-3 on Analog.com

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What is output of ADA4862 in power down?

		
	
				

			

									
					    bluesky
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 14, 2013 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    Is the output of the ADA4862-3 suitable for video mux applications? (i.e. high impedance when in shutdown)
    
 
    In either case what does the impedance of the output look like when in shut down.?
    
			
    
			
									
		                             
                        

    
    
                                            
                 Video Amplifiers and Analog Video Functions
                
                                                    
                 Video Operational Amplifiers (Op Amps)
                
                                                    
                 ada4862-3
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on May 15, 2013 3:23 PM
            
            
						
			            		
      
		
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      Hi Paul,
      
 
      The power-down feature shuts down the bias section to save power when a particular part is not in use, and does not produce an intentional high-Z output state.  If you were to use the part in a tri-state MUXed configuration, the outputs of the powered-down devices on the bus would appear as relatively high impedances as long as the signal from the active device is small, since the internal transistors are cutoff.  This is not a recommended way to operate the part, however, and I recommend instead that you use a dedicated MUX to select between outputs.
      
 
      Best regards.
      
 
      --Jonathan
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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