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AD8021 Production
The AD8021 is an exceptionally high performance, high speed voltage feedback amplifier that can be used in 16-bit resolution systems. It is designed to...
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AD8021 on Analog.com

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-Vs connection  Part Number: AD8021



		

			

									
					    yzli
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 25, 2024 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Subject: -Vs connection
    
 
    Part Number: AD8021
    
 
    Linear Product Category: NA
    
 
    Inquiry Description: 
    
 
    Just to double check, is it possible to connect the power supply (pin 4) to ground instead of the negative Vs value? All the design reference I saw (from UG727 document) connected the -Vs pin to a -ve voltage, but I'm constraint in terms of PCB area so I couldn't supply a negative voltage to the chip, hence I just want to double check if connecting -Vs to ground will still work. My input voltage range is from 0.2V to 3V, and my planned +Vs will be 5V.
    
									
			                
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    Tags: 
                                            
                 Operational Amplifiers (Op Amps)
                
                                                    
                 amplifiers
                
                                                    
                 adc driver
                
                                                    
                 Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C)
                
                                                    
                 ad8021
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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													+1
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Oct 4, 2016 5:58 AM
            
            
					
      
	
      

		
		
      
					
      Hi Yunzhe, 
      
 
      Unfortunately, connecting the -Vs pin to ground would limit your input voltage range to 0.9 to 4.6 volts, so it would not be able to detect your entire input range. Could you provide other requirements for your application? What will the end application be?
      
 
      Thanks, 
      
 
      Kris
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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