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AD7779 Recommended for New Designs
The AD7779 is an 8-channel, simultaneous sampling ADC. There are eight full Σ-Δ ADCs on chip. The AD7779 provides an ultralow input current to allow...
Datasheet
AD7779 on Analog.com

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PGA gain setting for AD7779

		
	
				

			

									
					    PhilB
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Sep 12, 2019 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    Hi,
    

    I'm using the AD7779 in pin config mode. I would liek to increase the PGA gain to 4, with a decimation rate of 512. Table 18 on page 39 of the datasheet suggests that setting the mode pins to 0101 would set channels 0-3 to 1 and channels 4-7 to a gain of 4. Is the datasheet correct here? If I want all channels set to a PGA gain of 4 is it necessary to use SPI config mode?
    

    Thanks
    

    PhilB
    

     
    
			
    
			
									
		                             
                        

    
    
                                            
                 ad7779
                
                                                    
                 Simultaneous Sampling A/D Converters
                
                                                    
                 pga
                
                                                    
                 Precision A/D Converters