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About AD7225

		
	
				

			

									
					    Tarzan
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Jan 7, 2016 
				
			
			
		

		
		                     
				
        		

		    
		    		    
		    			

			    
Hi there,

 
I have questions about AD7225.

 
http://www.analog.com/media/en/technical-documentation/data-sheets/AD7225.pdf

 
I'd like to know the following things.

 
#1, Does AD7225 have a power-on-reset?If so, what voltage is it?

 
#2, It looks like that datasheet does not mention the default value of  DAC register.Can you tell me the default value?

 
#3, I'd like to set the same value for all DAC registers at once. Do you think it's possible?

 
It seems like that  this device does not have this kind of function. The data should be written by setting A1 and A2 step by step.

 
Best regards,

 
Tarzan

			

			
									
		                             
                        

    

                                            
                 Voltage Output D/A Converters
                
                                                    
                 AD7225
                
                                                    
                 Multichannel Voltage Output D/A Converters
                
                                
            

    
    
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			


				
	









	
    
	

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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Jan 11, 2016 1:37 PM
            
            
						
			            		
    
		
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    Hi Tarzan-san,
    
 
    Apologies for the delayed response. To answer your questions, the AD7225 do not have a POR circuitry. If there is no POR circuitry in the part, the output would take the zero-scale code when starting from cold boot.
    
 
    You may write any code to each of the DAC channels by writing to the INPUT REGISTER and then update the DAC registers and DAC channel outputs all at once using /LDAC.
    
 
    I hope these answers your questions. Please do not hesitate to ask if you have any further questions.
    
 
    Regards,
    
 
    Mark
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
						
						
				
				
		
		
    
			
		
    
	
    

    

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                on Jan 13, 2016 1:39 AM
            
            
						
			            		
    
		
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    Hi Mark,
    
 
    Thank you for your answer.
    
 
    Let me ask you if there are other questions coming up.
    
 
    Best regards,
    
 
    Tarzan
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

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