S486 datasheet(8/12 Pages) UTC

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S486

CMOS IC

UNISONIC TECHNOLOGIES CO., LTD

8 of 12

www.unisonic.com.tw

QW-R502-074.D



T Y PI CAL APPLI CAT I ON CI RCU I T

BIAS

VCC

1µF

ZL=32

UTC S486=Stdby

COUT2

220µF

VCC

GND

20K

RFEED2

20K

RFEED1

20K

RIN1

CIN1

330nF

Right In

Left In

CIN2

330nF

RIN2

20K

Stdby

220µF

Stdby ctrl

Stdby level

threshold=0.9V

COUT1

COMPONENTS INFORMATION

Components

Functional Description

RIN1, 2

Inverting input resistor which sets the closed loop gain in conjunction with RFEED. This resistor

also forms a high pass filter with CIN (fc = 1 / (2 x

πx RIN x CIN) .

CIN1, 2

Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminal.

RFEED1, 2

Feedback resistor which sets the closed loop gain in conjunction with RIN.

AV= Closed Loop Gain= -RFEED/RIN.

Supply Bypass capacitor which provides power supply filtering.

Bypass capacitor which provides half supply filtering.

COUT1, 2

Output coupling capacitor which blocks the DC voltage at the load input terminal.

This capacitor also forms a high pass filter with RL (fc = 1 / (2 x

πx RL x COUT)).

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