Products Mentioned

AD7609 Production
The AD7609 is an 18-bit, 8-channel, true differential, simultaneous sampling analog-to-digital data acquisition system (DAS). The part contains analog...
Datasheet
AD7609 on Analog.com

Thread Details

  • State Verified Answer
  • +1 person also asked this people also asked this
  • Replies 1 reply
  • Subscribers 76 subscribers
  • Views 914 views
  • Users 0 members are here
Options
 
Related Content

        

            Post
             Go back to editing
        

    

    


    

    









		


















	
	
			
	
			
		
	
	
		

	    
	    
	    		
AD7609 Partial Power-Down?

		
	
				

			

									
					    teap
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 30, 2021 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    Hello,
    

    Is the AD7609 designed to withstand active analog input voltages (of up to +/-16V) while the device itself is powered-down?
    

    I'm not sure about the internal clamping circuit. Is this an active circuit that needs a proper power supply to work as intended?
    

    Thank you.
    
			
    
			
									
		                             
                        

    
    
                                            
                 Simultaneous Sampling A/D Converters
                
                                                    
                 Precision A/D Converters
                
                                                    
                 ad7609
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

    • 
	
      



	
			
		
	



      
	
      
		
      
							
					
      
		
      
		    
		    		    
			
				
									
							        
			
			
			
      •  Analog Employees  
      •  Super User  
      
            
						
                            
            
            				
            
                on Jul 1, 2021 12:11 AM
            
            
						
			            		
      
		
										+1
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      Hi, 
      

      The protection should work in normal or power-down mode. However, when device is powered-down I think it is recommended to tie both inputs to GND. The overvoltage clamp is use for transient overvoltage condition and not recommended to be active for extended periods in either mode (normal or power-down) as stressing the part outside range may degrade the Bipolar Zero Code error and THD performance as stated in the datasheet. 
      

      Thanks,
      

      Jellenie
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

      •