Data Sheet

AD5122A/AD5142A

Rev. A | Page 19 of 32

TEST CIRCUITS

Figure 32 to Figure 36 define the test conditions used in the Specifications section.

A

W

B

NC

DUT

NC = NO CONNECT

Figure 32. Resistor Integral Nonlinearity Error (Rheostat Operation; R-INL, R-DNL)

A

W

B

DUT

V+

Figure 33. Potentiometer Divider Nonlinearity Error (INL, DNL)

A

W

NC

B

DUT

NC = NO CONNECT

Figure 34. Wiper Resistance

A

W

B

PSRR (dB) = 20 LOG

(

)

~

PSS (%/%) =

V+

Δ

Figure 35. Power Supply Sensitivity and

Power Supply Rejection Ratio (PSS, PSRR)

+

–

DUT

CODE = 0x00

0.1V

0.1V

W

B

A = NC

Figure 36. Incremental On Resistance