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AD5752 not working



		

			

									
					    abtron
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Apr 12, 2018 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi, 
    I'm trying to set AD5752RBREZ (I use internal DAC reference) with Atmega16, but it is not working. It gives no output voltage. Between every step I have a delay. I would like to use bipolar output DAC A with range +-10,8V. Analog power supply is 15V, digital 5V. I don't use SDO output. I have connected SYNC, SCK, LDAC, CLR, SDIN with Atmega16. 
    My algorithm is:
    SYNC LOW
    WriteByte(0b00010000)
    WriteByte(0b00000000)
    WriteByte(0b00000011)  - The first I set Power control register
    SYNC HIGH
    LDAC LOW
    DELAY
    LDAC HIGH
    
 
    The same for Output range select register, I send:
    0x0C0005
    
 
    After that I send data to DAC Register, for example 0x001A30
    
 
    What could be wrong? Thanks.
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		






		

			
    
			
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      •  Analog Employees  
      
            
			                            
                        
                on Apr 12, 2018 1:54 PM
            
            
					
      
	
      

		
		
      
					
      Hi,
      
 
      You may refer to the "CONFIGURING THE AD5722/AD5732/AD5752" section of the datasheet.
      
 
      Correct power sequence should be followed, then set the output range then power up the channel through the power control register.
      
 
      If it still doesn't work for you, can you try the readback function to check whether the DAC is able to recognize what you wrote to the DAC register.
      
 

      Cheers,
      
 
      Ivan
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
			                            
                        
                on Apr 12, 2018 1:54 PM
            
            
					
      
	
      

		
		
      
					
      Hi,
      
 
      You may refer to the "CONFIGURING THE AD5722/AD5732/AD5752" section of the datasheet.
      
 
      Correct power sequence should be followed, then set the output range then power up the channel through the power control register.
      
 
      If it still doesn't work for you, can you try the readback function to check whether the DAC is able to recognize what you wrote to the DAC register.
      
 

      Cheers,
      
 
      Ivan
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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