EVAL-AD5142DBZ View Datasheet(PDF) - Analog Devices

Part Name

Description

MFG CO.

EVAL-AD5142DBZ

Dual Channel, 128-/256-Position, SPI, Nonvolatile Digital Potentiometer

Analog Devices 

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Data Sheet

AD5122/AD5142

TEST CIRCUITS

Figure 35 to Figure 39 define the test conditions used in the Specifications section.

NC

DUT

A

W

B

IW

VMS

NC = NO CONNECT

Figure 35. Resistor Integral Nonlinearity Error (Rheostat Operation; R-INL, R-DNL)

VA

VDD

V+ ~

AW

B

VMS

( ) V+ = VDD ±10%

PSRR (dB) = 20 LOG

∆VMS

∆VDD

PSS (%/%) = ∆VMS%

∆VDD%

Figure 38. Power Supply Sensitivity and

Power Supply Rejection Ratio (PSS, PSRR)

DUT

A

V+ = VDD

1LSB = V+/2N

V+

W

B

VMS

DUT

W

B

A = NC

RSW =

0.1V

ISW

CODE = 0x00

+

ISW

0.1V

–

VSS TO VDD

Figure 36. Potentiometer Divider Nonlinearity Error (INL, DNL)

Figure 39. Incremental On Resistance

NC

DUT

A

W

B

IW = VDD/RNOMINAL

VW

VMS1

RW = VMS1/IW

NC = NO CONNECT

Figure 37. Wiper Resistance

Rev. C | Page 19 of 32

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