X9268_06 Datasheet, PDF(21/22 Page) Intersil Corporation – Dual Digitally-Controlled Potentiometers

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X9268_06 Datasheet, PDF (21/22 Pages) Intersil Corporation – Dual Digitally-Controlled Potentiometers

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Application Circuits (continued)

Attenuator

X9268

R4 R1 = R2 = R3 = R4 = 10kâ¦

VO = G VS

-1/2 â¤ G â¤ +1/2

Filter

GO = 1 + R2/R1

fc = 1/(2ÏRC)

Inverting Amplifier

R1 R2

VO = G VS

G = - R2/R1

Function Generator

} RA

} RB

frequency â R1, R2, C

amplitude â RA, RB

Equivalent L-R Circuit

ZIN

ZIN = R2 + s R2 (R1 + R3) C1 = R2 + s Leq

(R1 + R3) >> R2

FN8172.4

August 29, 2006

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