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ADF4356 Recommended for New Designs
The ADF4356 allows implementation of fractional-N or integer-N phase-locked loop (PLL) frequency synthesizers when used with an external loop filter and...
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ADF4356 on Analog.com

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How would you recommend powering the many power rails on an ADF4356?

		
	
				

			

									
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  •  Analog Employees  

			
			
			    	
			                    
                
				                on Mar 27, 2018 
				
			
			
		

		
		                    	    

        	    
Thread Summary

                The user asks about powering the ADF4356's multiple voltage rails, specifically whether the 3.3V rail for AVDD, DVDD, and VRF can be shared. The final answer recommends using a clean LDO like the ADM7150, HMC1060, or LTC3045 for the 5V rail, and notes that the 3.3V rail is more forgiving. The evaluation board (EV ADF4356SD1Z) uses a single 3.3V rail for AVDD and DVDD, and a separate 3.3V rail for VRF, which is different from the datasheet recommendation of using two ADM7170 regulators.
                        	    

                
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How would you recommend powering the many power rails on an ADF4356? For example, would you advise a single plane for a single voltage rail and do discontinuities make a difference?

			

			
									
		                             
                        

    

                                            
                 adf4356
                
                                                    
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                 Fractional-N PLL
                
                                                    
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                 Phase Locked Loop (PLL) Synthesizer & Translation Loop
                
                                        
                                            
                
                
                                
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