X9401_09 Datasheet, PDF(15/18 Page) Intersil Corporation – Quad, 64 Tap, Digitally Controlled Potentiometer (XDCP™)

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X9401_09 Datasheet, PDF (15/18 Pages) Intersil Corporation – Quad, 64 Tap, Digitally Controlled Potentiometer (XDCP™)

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X9401

Applications information

Basic Configurations of Electronic Potentiometers

+VR

VW/RW

THREE TERMINAL POTENTIOMETER;

VARIABLE VOLTAGE DIVIDER

Application Circuits

NONINVERTING AMPLIFIER

VO = (1+R2/R1)VS

OFFSET VOLTAGE ADJUSTMENT

100KÎ©

TL072

10KÎ©

+5V

ATTENUATOR

ALL RS = 10KÎ©

VO = G VS

-1/2 â¤ G â¤ +1/2

TWO TERMINAL VARIABLE RESISTOR;

VARIABLE CURRENT

VOLTAGE REGULATOR

VIN

317

IADJ

VO (REG) = 1.25V (1+R2/R1)+IADJ R2

VO (REG)

COMPARATOR WITH HYSTERESIS

R1 R2

VUL = {R1/(R1+R2)} VO(MAX)

VLL = {R1/(R1+R2)} VO(MIN)

FILTER

GO = 1 + R2/R1

fc = 1/(2ÏRC)

FN8190.4

October 13, 2009

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