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HMC943APM5E Production
The HMC943APM5E is a four stage, gallium arsenide (GaAs), pseudomorphic high electron mobility transistor (pHEMT), monolithic microwave integrated circuit...
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HMC943APM5E on Analog.com

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Decoupling network for HMC943APM5E



		

			

									
					    EZADI_123
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 10, 2020 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi - The HMC943APM5E datasheet shows a requirement for 3 decoupling caps per qty. 8 Vd and qty. 2 Vg pins; that is a total of 30 capacitors.  Do you have any recommendations for a simplified decoupling network that will result in performance that meets the datasheet performance (including over temp).  For example, tying all pins at the device and bulking up capacitance in less overall capacitors?
    

    Thanks!
    
										

    
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[edited by: EZADI_123 at 6:12 PM (GMT 0) on 9 May 2020]
				
    
					
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on May 26, 2020 10:17 PM
            
            
					
      
	
      

		
		
      
					
      Hi Fernando,
      

      

      This is generally difficult to determine without testing:
      

      1. 4.7uF are power supply noise reduction capacitors so need for them depends on your pcb.
      

      But at least you can reduce their number if for example you are using the same voltage point for supplying Vdd1...4, in that case you can use only on 4.7uF. This also applies for Vgg pins.
      

      2. Need for other caps here depends on your pcb therefore I can not say anything with certainty without testing.
      

      

      Regards
      

      Ivan
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
			                            
                        
                on May 26, 2020 10:17 PM
            
            
					
      
	
      

		
		
      
					
      Hi Fernando,
      

      

      This is generally difficult to determine without testing:
      

      1. 4.7uF are power supply noise reduction capacitors so need for them depends on your pcb.
      

      But at least you can reduce their number if for example you are using the same voltage point for supplying Vdd1...4, in that case you can use only on 4.7uF. This also applies for Vgg pins.
      

      2. Need for other caps here depends on your pcb therefore I can not say anything with certainty without testing.
      

      

      Regards
      

      Ivan
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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