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ADPD1080 Recommended for New Designs
The ADPD1080/ADPD1081 are highly efficient, photometric front ends, each with an integrated 14-bit analog-to-digital converter (ADC) and a 20-bit burst...
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ADPD1080/ADPD1081 GPIO output logic levels

		
	
				

			

									
					    Repa
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on May 4, 2026 
				
			
			
		

		
		                    	    

        	    
Thread Summary

                The user asked if the GPIO0 and GPIO1 outputs of the ADPD1080/1081 are clamped to DVDD when configured as open-drain. The final answer confirms that even in open-drain configuration, the outputs are clamped to DVDD, and a level translation is required for 3.3V IO, not just a pull-up resistor.
                        	    

                
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Category: Hardware

    		        		            		    
Product Number:  ADPD1080  

    		        		    		    

		    		    
		    			

			    
Greetings,


when using the GPIO0 and GPIO1 outputs of ADPD1080/1081 are the outputs clamped to the DVDD? I.e. then setting GPIO0_ENA to '1' and GPIO0_DRV to '1' and pulling the GPIO0 to 3.3 volts with an external pull-up, will the logic high be DVDD - Vclamp (1.8V - 0.5V approximately), not 3.3 volts?


Thanks!

			

			
									
		                             
                        

    

                                            
                 Analog to Digital Converters (ADCs)
                
                                                    
                 hardware
                
                                                    
                 ADPD1080