Products Mentioned

LTC5531 Production
The LTC5531 is an RF power detector for RF applications operating in the 300MHz to 7GHz range. A temperature compensated Schottky diode peak detector and...
Datasheet
LTC5531 on Analog.com

LTspice Production
LTspice® is a powerful, fast, and free SPICE simulator software, schematic capture and waveform viewer with enhancements and models for improving the simulation...
LTspice on Analog.com

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LTC5531

		
	
				

			

									
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				                on Aug 6, 2025 
				
			
			
		
    
		
		                    
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    Category: Hardware
    
    		        		            		    
    Product Number:  LTC5531 
    
    		        		    		    
    
		    		    
		    			
    
			    
    I tried to simulate the output voltage of the LTC5531 using LTspice, but I couldn't find any formulas or detailed input power vs. output voltage data in the datasheet.
    
			
    
			
									
		                             
                        

    
    
                                            
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Aug 7, 2025 4:46 PM
            
            
						
			            		
      
		
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      If you want to develop an simple equation for the transfer function of the device in the form Vout (dc) = Vin(ac)xSlope(V/V) + Intercept, do the following. 
      1. Pick a curve in the datasheet that you want to reproduce. (e.g. 300 MHz, Vos=0V). Pick two input levels (e.g. -4dBm and +4 dBm) and the corresponding output voltages (0.9V and 2.4V).
      2. Convert the dBm values to rms voltage. 
      3. Calculate the slope ((Vout2-Vout1/(Vin2-Vin1)).
      4. Calculate the intercept = Vout2-(Vin2/Slope).
      5. Now you have an equation for the operation of the part that you can test against simulation.. 
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
				
				
				
		
		
      
			
		
      
	
      

      

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