X9118_09 Datasheet, PDF(16/17 Page) Intersil Corporation – Single Digitally-Controlled (XDCP™) Potentiometer

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X9118_09 Datasheet, PDF (16/17 Pages) Intersil Corporation – Single Digitally-Controlled (XDCP™) Potentiometer

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Application Circuits (Continued)

X9118

ATTENUATOR

R1 = R2 = R3 = R4 = 10kÎ©

VO = G VS

-1/2 â¤ G â¤ +1/2

FILTER

GO = 1 + R2/R1

fc = 1/(2ÏRC)

INVERTING AMPLIFIER

VO = G VS

G = - R2/R1

EQUIVALENT L-R CIRCUIT

ZIN

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

(R1 + R3) >> R2

FUNCTION GENERATOR

} RA

} RB

frequency â R1, R2, C

amplitude â RA, RB

FN8161.4

December 4, 2009

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