Products Mentioned

AD7147 Production
The AD7147 CapTouch™ controller is designed for use with capacitance sensors implementing functions such as buttons, scroll bars, and wheels. The sensors...
Datasheet
AD7147 on Analog.com

AD7147A Obsolete
The AD7147A CapTouch™ controller is designed for use with capacitance sensors implementing functions such as buttons, scroll bars, and wheels. The sensors...
Datasheet
AD7147A on Analog.com

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How to adjust the sensitivity and calculate capacitance for AD7147

		
	
				

			

									
					    HuaWuque
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Dec 25, 2024 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  AD7147A  
    
    		        		    		    
    
		    		    
		    			
    
			    
      

    • I would like to adjust the sensitivity of the AD7147, for example, to increase or decrease the CDC output corresponding to 1pF. Is there a method to achieve this?
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    • How can I convert the CDC output into capacitance?
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                 Datasheet/Specs
                
                                                    
                 ad7147a
                
                                                    
                 ad7147
                
                                                    
                 Integrated/Special Purpose A/D Converters
                
                                                    
                 Capacitive-to-Digital and Touch Screen Controllers