X9015WS8Z-2.7 datasheet(9/12 Pages) INTERSIL

Part #	X9015WS8Z-2.7

Description	Single Digitally Controlled

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Manufacturer	INTERSIL [Intersil Corporation]

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9 / 12 page

9

FN8157.6

August 14, 2015

Applications Information

Electronic digitally controlled potentiometers provide two powerful application advantages: (1) the variability and reliability of a

solid-state potentiometer, and (2) the flexibility of computer-based digital controls.

Basic Configurations of Electronic Potentiometers

Basic Circuits

VR

VW/RW

VR

I

THREE-TERMINAL POTENTIOMETER;

VARIABLE VOLTAGE DIVIDER

TWO-TERMINAL VARIABLE RESISTOR;

VARIABLE CURRENT

VH/RH

VL/RL

Cascading Techniques

Buffered Reference Voltage

–

+

+5V

R1

+V

–5V

VW/RW

VREF

VOUT

OP-07

VW/RW

+V

X

(a)

(b)

VOUT = VW

Noninverting Amplifier

+

–

VS

VO

R2

R1

VO = (1+R2/R1)VS

LM308A

VOLTAGE REGULATOR

R1

R2

Iadj

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

VO (REG)

VIN

317

OFFSET VOLTAGE ADJUSTMENT

+

–

VS

VO

R2

R1

100k



10k



10k



10k



-12V

+12V

TL072

COMPARATOR WITH HYSTERESIS

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

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

+

–

VS

VO

R2

R1

LT311A

+5V

–5V

(FOR ADDITIONAL CIRCUITS, SEE AN115.)

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