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...
Datasheet
ADL5303 on Analog.com

Thread Details

  • State Verified Answer
  • Replies 3 replies
  • Subscribers 70 subscribers
  • Views 410 views
  • Users 0 members are here
 
Related Content

        

            Post
             Go back to editing
        

    

    


    

    









		


















	
	
			
	
			
		
	
	
		

	    
	    
	    		
Input circuit for the ADL5303 when using the full range

		
	
				

			

									
					    Denny3
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Aug 1, 2025 
				
			
			
		
    
		
		                    
                 Contains AI Generated Content
            
                    	    
    
        	    
    Thread Summary
    
                The user inquired about potential issues with using VPDB as the bias for the ADL5303 over its full current range, particularly in the high current range (several hundred μA). The final answer indicates no known issues, emphasizing that the VPDB pin is designed to scale the bias voltage with photodiode current. The user was directed to focus on Figure 29 in the datasheet for further guidance.
                        	    
    
                
                     AI Generated Content
                
    	    
    
             
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  ADL5303  
    
    		        		    		    
    
		    		    
		    			
    
			    
    When using the ADL5303 over its full range, are there any particular problems with using VPDB as the bias?
    

    I don't think there will be any problems in the low current range, but are there any precautions to take in the high current range (several hundred μA or more)?
    
			
    
			
									
		                                 
    Thread Notes  
    
                
    
        
                                        
                        

    
    
                                            
                 hardware
                
                                                    
                 opamp
                
                                                    
                 Logarithmic Transimpedance Amplifiers
                
                                                    
                 logamp
                
                                                    
                 Specialty Amplifiers
                
                                        
                                            
                
                
                                
                    Show More