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Products Mentioned

ADRF5474 Recommended for New Designs
The ADRF5474 is a 4-bit digital attenuator with 22 dB attenuation control range in 2 dB steps manufactured in a silicon process attached on a gallium arsenide...
Datasheet
ADRF5474 on Analog.com

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Bias and power up LE VS VDD

		
	
				

			

									
					    Andrew771211
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Nov 20, 2025 
				
			
			
		

		
		                    	    

        	    
Thread Summary

                The user inquires about using the ADRF5474 in direct parallel mode with Vss at -3.3V, Vdd and LE tied to +3.3V. The support engineer confirms that this bias sequencing (Vss, Vdd/LE, then digital bits) is acceptable and will work fine.
                        	    

                
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Category: Hardware

    		        		            		    
Product Number:  ADRF5474  

    		        		    		    

		    		    
		    			

			    
Hi,


I want to use the ADRF5474 in direct parallel mode.


Doing so, I want to feed Vss to -3,3V, Vdd  and LE physically tied together to +3,3 V,


so bias sequencing will be: Vss, VDD and LE and after digital bits


Are there any consequences?




Thanks


Andrea

			

			
									
		                             
                        

    

                                            
                 ADRF5474
                
                                                    
                 hardware
                
                                                    
                 Digital Step Attenuators
                
                                                    
                 attenuators
                
                                
            

    
    
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                                                    
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			


			
	













	
			








	






































     



















		        
        

            
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