X9408_09 Datasheet, PDF(18/20 Page) Intersil Corporation – Quad Digitally Controlled (XDCP™) Potentiometers

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X9408_09 Datasheet, PDF (18/20 Pages) Intersil Corporation – Quad Digitally Controlled (XDCP™) Potentiometers

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Application Circuits (continued)

X9408

ATTENUATOR

All RS = 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 ÂµR1, R2, C

AMPLITUDE ÂµRA, RB

FN8191.4

January 15, 2009

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