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ADRV9002 Recommended for New Designs
The ADRV9002 is a highly integrated RF transceiver that has dual-channel transmitters, dual-channel receivers, integrated synthesizers, and digital signal...
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ADRV9002 on Analog.com

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Rx input power limiting values

		
	
				

			

									
					    RKH
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 13, 2025 
				
			
			
		
    
		
		                    	    
    
        	    
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                The user inquires about the maximum safe input power for the ADRV9002 Rx ports, noting a discrepancy between the datasheet (25 dBm CW for >7 years with 30 dB FE attenuation) and ug1828 (18 dBm peak). The final answer clarifies that the ug1828 limit is the most relevant for safe operation, and the user confirms that limiting input power to +18 dBm is within both the recommended limit and the full-scale input signal level when 30 dB attenuation is applied.
                        	    
    
                
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    Category: Hardware
    
    		        		            		    
    Product Number:  ADRV9002  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hopefully an easy one for the Experts to answer...
    

    Table 14 in the datasheet states that the RF Ports will handle 25 dBm CW for >7 years if the Front End attenuator is set to 30 dB. (Assumes device is powered)
    

    However, page 270 of ug1828 states that the "maximum safe input power is 18 dBm (peak)" for the Rx ports. Its unclear if this limit assumes any FE attenuation or if the device is even powered or not.
    

    

    In our application, the preceding RF chain includes gain such that weak signals of interest occupy >-60 dBFS. To monitor stronger signals we can introduce 30 dB of attenuation. However, when the attenuation is not enabled, unexpected blockers may exceed 0 dBFS. Although not ideal, we can accept blockers exceeding the dynamic range but we must also ensure that they do not cause damage.
    

    

    For reliable operation, should we limit input power at the ADRV9002 pin to below +18 dBm or are we OK follow datasheet Table 14?
    
			
    
			
									
		                             
                        

    
    
                                            
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 13, 2025 5:09 AM
            
            
						
			            		
      
		
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      Hi, 
      

      The information in the ug is the most relevant for determining the real maximum usable input range. The datasheet specification primarily addresses long-term reliability and how sustained high-power signals can degrade the device over time. In practice, you should follow the ug limits for safe operation. Essentially, care must be taken to avoid exposing the Rx ports to very high-power signals.
      

      Regards
      

      Rahul
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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                on Nov 13, 2025 8:55 AM
            
            
												
						in reply to RahulMushini
					
										
			            		
        
		
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        Understood, thanks for the reply Rahul.
        

        +18dBm is approximately 30dB above the -11.4dBm level (at the pin) that results in FSD (+8.6dBm) of the ADC. So I understand that this is the maximum usable input range when 30dB Front End attenuation is engaged. The ug uses the words "maximum safe input power" which I interpreted as being a damage limit, this was why I asked.
        

        So if we limit power to +18dBm then this is well within the recommended limit in the datasheet and also full-scale input signal level - when 30dB attenuation has been applied.
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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