Products Mentioned

ADL5303 Recommended for New Designs
The ADL5303 is a monolithic logarithmic detector optimized for the measurement of low frequency signal power in fiber optic systems and offers a large...
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ADL5303 on Analog.com

AD829 Production
The AD829 is a low noise (1.7 nV/√Hz), high speed op amp with custom compensation that provides the user with gains of 1 to 20 while maintaining a bandwidth...
Datasheet
AD829 on Analog.com

AD7655 Production
The AD7655 is a low cost, simultaneous sampling, dual-channel, 16-bit, charge redistribution SAR, analog-to-digital converter that operates from a single...
Datasheet
AD7655 on Analog.com

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Regarding power supply for the AD829ARZ

		
	
				

			

									
					    ankit
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Jul 9, 2026 
				
			
			
		

		
		                     
				
        		

		    
		    		    

		      		            		        
Category: Hardware

    		        		            		    
Product Number:  AD829  

    		        		    		    

		    		    
		    			

			    
Hi Team,


I have the following setup:


 PD out (Photo-diode output) --> ADL5303 (Log Amp) --> AD829 (Driver Amp) --> AD7655 (ADC).


I have a query regarding AD829:


Can I connect GND to -Vs (pin 4) in place of the -5V supply and +5V to +Vs for AD829, as I am using AD829 as a unity-gain buffer before ADC and the output swing for ADL5303 is 0.1V- 1.6V? 



			

			
									
		                             
                        

    

                                            
                 Operational Amplifiers (Op Amps)
                
                                                    
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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Jul 12, 2026 8:54 PM
            
            
						
			            		
    
		
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    Hi  

    No, the AD829 cannot operate from a single 5V supply. Its minimum specified supply span is 9V, and its input common-mode and output swing do not extend close enough to the negative rail for a 0.1 signal.

     

    Please continue using ±5V, or select a unity-gain stable rail-to-rail amplifier designed for 5V single-supply ADC driving.

    Best Regards,
    Ian
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

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