SNLA385 September 2021 DP83561-SP , DP83620 , DP83630 , DP83640 , DP83822H , DP83822HF , DP83822I , DP83822IF , DP83825I , DP83826E , DP83826I , DP83843 , DP83847 , DP83848-EP , DP83848-HT , DP83848C , DP83848H , DP83848I , DP83848J , DP83848K , DP83848M , DP83848Q-Q1 , DP83848T , DP83848VYB , DP83848YB , DP83849C , DP83849I , DP83849ID , DP83849IF , DP83867CR , DP83867CS , DP83867E , DP83867IR , DP83867IS , DP83869HM
The following formula can be copied into a Microsoft® Excel file. With this helper the engineer can validate if the test equipment vendor is using the correct percent error formula:
Va = 695.89 mV
Vb = 708.24 mV
=100*((B2-0.5*(B1+B2))/(0.5*(B1+B2)))
The result in the Excel table cell B3 reports that the test result has been passed because it is below 1%. The test report from the test equipment vendor shows a failed test case. In this case the formula used in Figure 1-1 by the manufacturer is incorrect and out-of-date. When facing this situation, contact the test manufacturer for a software update.