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AD5123 RAB輸入頻率問題


		

			

									
						tchen340
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Dec 20, 2019 
				
			
			
		


				
		

			
Dears,


AD5123設計應用RWB調整op buffer gain,當op輸入訊號頻率在 7.8KHz 時,輸出波形正常.


但當op輸入訊號頻率在 125KHz & 500KHz 時,輸出波形不正常.(量測點B355,B356,B357)


相同的條件下,將AD5123改用一般電阻,波形正常.(量測點A351,A352,A353)


請問是什麼原因呢?線路及量測點與波形如下.謝謝.


線路及量測點:


  




A351


 




A352


 




A353


 




B355


 




B356


 




B357


 

								


				
				
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	










	

	

					



			








	
	
	
	



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