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ADL5523 Recommended for New Designs
The ADL5523 is a high performance GaAs pHEMT low noise amplifier. It provides high gain and low noise figure for single-downconversion IF sampling receiver...
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ADL5523 on Analog.com

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ADL5523 failure



		

			

									
					    MDo
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 22, 2019 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hello,
    

    I met several cases of ADL5523 failures which is characterized by over current consumption of 200mA on power input (sooner a short circuit...).
    

    This component is power by a LDO generating 3.3V from USB 5V. 
    

    Without considering potential over voltages from USB 5V which could damage the component through the LDO (if the voltage is not well regulated), I would like to focus on the power supply voltage.
    

    The ADL5523 is powered with 3.3V, but the none resistor is used to protect VPOS from input power overdrive as advised for 3V configuration.
    

    Is the failure could come from this 3.3V power voltage?
    

    Is it necessary to add serial resistor to limit input power overdrive as 5V configuration?
    

    

    Best regards,
    

    

    Martial