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ADF5901 Recommended for New Designs
The ADF5901 is a 24 GHz Tx monolithic microwave integrated circuit (MMIC) with an on-chip, 24 GHz VCO with PGA and dual Tx channels for radar systems....
Datasheet
ADF5901 on Analog.com

ADF4159 Recommended for New Designs
The ADF4159 is a 13 GHz, fractional-N frequency synthesizer with modulation and both fast and slow waveform generation capability. The part uses a 25-bit...
Datasheet
ADF4159 on Analog.com

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ADF5901 output power issue.

		
	
				

			

									
					    Rainy
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Jan 18, 2021 
				
			
			
		

		
		                    	    

        	    
Thread Summary

                The user wants to control the output power of TXOUT 1 and TXOUT 2 on the ADF5901 with ADF4159 to 5dBm and 8dBm, respectively. The final answer explains that the Tx power can be adjusted by changing the Tx Amp Cal bitfield in register 1, but both Txs use the same amplitude setting, requiring recalibration when switching between outputs. The datasheet provides details on recalibration on pages 23 and 24.
                        	    

                
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Hello,


I'm using ADF5901 with ADF4159. 


i want to use txout 1 for 5dBm, txout 2 for 8dBm.


how can i control each output power ?

			

			
									
		                             
                        

    

                                            
                 Microwave and mmWave Transmitters
                
                                                    
                 RF Integrated Transmitters
                
                                                    
                 rf & microwave
                
                                                    
                 Fractional-N PLL
                
                                                    
                 adf4159
                
                                        
                                            
                
                
                                        
                                            
                
                
                                
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    •  Analog Employees  
    •  Super User  
    
            
						
                            
            
            				
            
                on Jan 19, 2021 7:33 AM
            
            
						
			            		
    
		
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    Hi,
    

    The Tx power can be controlled by changing the amplitude calibration bitfield (Tx Amp Cal) in register 1 during calibration. See figure 7 in datasheet. To get different output powers on each Tx unfortunately you will have to re-run calibration with the new Tx Amp Cal code when you switch Tx to recalibrate the power, since both Txs use the same amplitude setting bitfield. The datasheet explains how to re-run calibration on page 23 & 24
    

    Regards,
    

    Alex
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
				
				
				
		
		
    
			
		
    
	
    

    

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