Thread Details

  • State Not Answered
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 368 views
  • Users 0 members are here
Options
Related 

        

            Post
             Go back to editing
        

    

    


    

    









		


















	
	
			
	
			
		
	
	
		

	    
	    
	    		
AD5677R & AD5673R EVAL-AD5677RSDZ dev board. DAC not responding and possible error in schematics.

		
	
				

			

									
					    BHTSDR
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Sep 29, 2020 
				
			
			
		

		
		                     
				
        		

		    
		    		    
		    			

			    
I have been trying to get the board and DAC running for some time now, but the DAC don't seem to respond to any commands (it responds to address scan though).


I've tried to write the DAC outputs directly (3-bytes consisting 0011+dac addres, data high byte,data low byte) and using the input registers (001) and latching the values to the output (0010).


I can't also read from the DAC registers. There are two more devices on the same I2C bus and I managed to write their drivers and get them to work immediately.


I have two questions and one statement to begin with:


- This is relatively new chip and dev board, has anyone get these working?


- Are you supposed to supply the VIO yourself (I2C_PMOD) ?


- There seems to be an error in the schematis: on the page 8, the VIO is connected to VDD and VDD is connected to VLOGIC in the DAC. This might be an issue. 




Best regards,




Janne

			

			
									
		                             
                        

    

                                            
                 ad5677r
                
                                                    
                 Voltage Output D/A Converters
                
                                                    
                 ad5673r
                
                                                    
                 eval-5677rsdz
                
                                                    
                 Single-Supply Voltage Output D/A Converters
                
                                
            

    
    
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			


				
	









	
    
	

  • 
	
    



	
		
	
	



    
	
    
		
    
							
					
    
		
    
		    
		    		    
			
				
									
							        
			
			
			
    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Sep 30, 2020 2:22 AM
            
            
						
			            		
    
		
										0
					
	
    

		
		
    
		
    
                                
                                                            
    
					
    Hi Janne, 
    

    BHTSDR said:
    - This is relatively new chip and dev board, has anyone get these working?
    

    Yes, I was able to use this board previously, although I used the SDP board and not the PMOD interface. 
    

    BHTSDR said:
    - Are you supposed to supply the VIO yourself (I2C_PMOD) ?
    

    You are correct. If you are using the PMOD interface, the controller should provide the VIO. 
    

    BHTSDR said:
    - There seems to be an error in the schematis: on the page 8, the VIO is connected to VDD and VDD is connected to VLOGIC in the DAC. This might be an issue. 
    

    This part is a typo error only on the schematic image. Just checked the actual layout file and VIO is connected to VLOGIC and VDD to VDD. Sorry about this, it's lined up to be updated the next revision of the user guide. 
    

    Can you also make sure the RESET and LDAC are idled high on your controller to avoid any problems from them? 
    

    Best regards,
    

    Ian
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

    •