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AD7143 Obsolete
The AD7143 is an integrated capacitance-to-digital converter (CDC) with on-chip environmental calibration for use in systems requiring a novel user input...
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AD7143 on Analog.com

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Does the pad on the AD7143 CDAC chip have to be grounded?



		

			

									
					    gbmhunter
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Dec 22, 2011 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    
 
    Does the pad on the underside of the AD7143 (QFN-like package) have to be grounded for the IC to work?
    
 
    I have connected everything up except this pad, and the chip won't respond over I2C (no acknowledge bit).
    
 
    Cheers, Geo