Nonvolatile, I2C-Compatible 64-Position, Digital Potentiometer ...

AD5258TEST CIRCUITSFigure 31 through Figure 36 illustrate the test circuits thatdefine the test conditions used in the product specificationtables.V+DUTAWBV+ = V DD1LSB = V+/2 NV MS05029-030V+∆V DDV A∆VDUT (MS)AWBV+ = V DD ± 10%PSRR (dB) = 20 LOG∆V∆V MS % DDPSS (%/%) =∆V DD %V MS05029-033Figure 31. Test Circuit for Potentiometer Divider Nonlinearity Error (INL, DNL)Figure 34. Test Circuit for Power Supply Sensitivity (PSS, PSSR)NO CONNECTDUTA WBV MSI W05029-031OFFSETGNDV IN+2.5VABDUTW+5VAD8610–5VV OUT05029-034Figure 32. Test Circuit for Resistor Position Nonlinearity Error(Rheostat Operation; R-INL, R-DNL)Figure 35. Test Circuit for Gain vs. FrequencyV MS2DUTAWBV WV MS1I W = V DD /R NOMINALR W = [V MS1 – V MS2 ]/I W05029-032DUTWR SW = 0.1V I SWCODE = 0x000.1VI SWBGND TO V DD05029-035Figure 33. Test Circuit for Wiper ResistanceFigure 36. Test Circuit for Common-Mode Leakage CurrentRev. 0 | Page 13 of 24