• State Verified Answer
  • Replies 11 replies
  • Subscribers 70 subscribers
  • Views 1116 views
  • Users 0 members are here
Options
Related 

        

            Post
             Go back to editing
        

    

    


    

    









		











	
	
			
	
			
		
	
	
		

		
ADC Requriement



		

			

									
						SHARVY
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Apr 3, 2016 
				
			
			
		


				
		

		    		    
		    
		    	
			
I am having a latest requirement to design the new ADC cards with the below specification. Kindly let me know, about which ADC chip from AD is more suited.

 
    
  
  • Type
    1:    
   
      
    
    • Analog inputs: Minimum, 8-Analog
      Inputs (AI) w/ Surge Protection. Surge protection shall be external. 
      • 
    
    • Resolution: 10-12bit, min 
      • 
    
    • Precision: +/- 0.5% on DC Readings 
      • 
    
    • Channel Isolation: 1000 Volts
      isolation between each channel 
      • 
    
    • Input Impedance: Min 20 mega ohms up
      to 350 volts ranges, 230k Ohms up to 100 mv range. 
      • 
   
    • 
  
  • Type 2:
   
      
    
    • 4-20mA 
      • 
   
    • 
 

 
Best Regards

 
Sharvy

								


				
				
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	

		
	















	

	

					



			








	
	
	
	



Parents
	
    
	

  • 
	
    



	
		
	
	



    
	
    
		
    
							
					
    
		
    
			
													0
							
			
				
									
							        
            
                                                                                                        
      
                            
    • 
                                 Analog Employees 
                                
                            
      • 
                        
     
                                                           			
			                            
                        
                on Apr 25, 2016 12:21 AM
            
            
					
    
	
    

		
		
    
					
    Hi Sharvy,
    
 
         The AD7791 is a good choice for your requirement and it has a buffer. For the AD7791 when the input buffer is enable, the buffer requires headroom. This means that the analog input must be at 100mV inside the power supply rails. The Ain- needs to be connected to some bias(100mV).
    
 
    Regards,
    
 
    Jonathan
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

    • 

	




Reply

    


  • 
	
    



	
		
	
	



    
	
    
		
    
							
					
    
		
    
			
													0
							
			
				
									
							        
            
                                                                                                        
      
                            
    • 
                                 Analog Employees 
                                
                            
      • 
                        
     
                                                           			
			                            
                        
                on Apr 25, 2016 12:21 AM
            
            
					
    
	
    

		
		
    
					
    Hi Sharvy,
    
 
         The AD7791 is a good choice for your requirement and it has a buffer. For the AD7791 when the input buffer is enable, the buffer requires headroom. This means that the analog input must be at 100mV inside the power supply rails. The Ain- needs to be connected to some bias(100mV).
    
 
    Regards,
    
 
    Jonathan
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

    • 





Children
	
No Data