EVAL-AD5144DBZ View Datasheet(PDF) - Analog Devices

Part Name

Description

MFG CO.

EVAL-AD5144DBZ

Quad Channel, 128-/256-Position, I2C/SPI, Nonvolatile Digital Potentiometer

Analog Devices 

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AD5124/AD5144/AD5144A

Data Sheet

TEST CIRCUITS

Figure 39 to Figure 43 define the test conditions used in the Specifications section.

NC

DUT

A

W

B

IW

VMS

NC = NO CONNECT

VA

VDD

V+ ~

A

W

B

VMS

( ) V+ = VDD ±10%

ΔVMS

PSRR (dB) = 20 LOG ΔVDD

PSS (%/%) = ΔVMS%

ΔVDD%

Figure 39. Resistor Integral Nonlinearity Error (Rheostat Operation; R-INL, R-DNL)

Figure 42. Power Supply Sensitivity and

Power Supply Rejection Ratio (PSS and PSRR)

DUT

V+ = VDD

A

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 40. Potentiometer Divider Nonlinearity Error (INL, DNL)

Figure 43. Incremental On Resistance

NC

DUT

A

W

B

IW = VDD/RNOMINAL

VW

VMS1

RW = VMS1/IW

NC = NO CONNECT

Figure 41. Wiper Resistance

Rev. C | Page 22 of 36

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