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AD5933 Production
The AD5933 is a high precision impedance converter system solution that combines an on-board frequency generator with a 12-bit, 1 MSPS, analog-to-digital...
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AD5933 on Analog.com

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Accessing all pins of AD5933 on eval board



		

			

									
					    sam123456
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Apr 6, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    

    I purchased an AD5933 evaluation board for a student project.  I only needed the AD5933 chip itself, but I was not able to find any.  I thought that the evaluation board was basically the same, except with many additional convenience features added on. 
    

    For the project (measuring body fat https://www.instructables.com/Body-Composition-using-BIA/), I need to connect an arduino to the SCL and SCA pins.  Is this possible?  It seems the eval board has dedicated pins for the Vin and Vout, for example, but I can't see anything for the SCL and SCA pins.  

    Thanks!
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 clock and timing
                
                                                    
                 Direct Digital Synthesis (DDS)
                
                                                    
                 ad5933
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Super User  
      
            
						
                            
            
            				
            
                on Apr 6, 2022 6:14 PM
            
            
					
      
	
      

		
		
      
					
      Hopefully somebody from ADI can help you to get samples.
      

      I2C lines on the board are connected to microcontroller U3, please see the schematic on pp. 23, 24 in UG-364.   from ADI says you can simply connect your I2C lines to the correspondent lines on the evaluation board as long as the U3 microcontroller is not communicating with the AD5933 or EEPROM there should be no conflict, see the discussion here. Good spot to solder some thin wires would be the signal pins of R15 (SDA)  and R16 (SCL) sitting next to U4, the layout makes it obvious which pins are signal and which are connected to beefy +3.3V trace.
      

      Best of luck!
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
				
						
				
				
		
		
      
			
		
      
	
      

      

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