LM4880L-SH2-R datasheet(5/12 Pages) UTC

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LM4880

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5 of 12

www.unisonic.com.tw

QW-R502-033,C

TYPICAL APPLICATION

Bias

OUT A

OUT B

Shutdown

Bypass

IN B

IN A

GND

20kΩ

Audio

Input

Audio

Input

20kΩ

VDD/2

50kΩ

0.1µF

20kΩ

VDD

*CO

8Ω or 32Ω

50kΩ

*CO

1.0µF

*Ci

*CI

20kΩ

Fig. 1 Typical Audio Amplifier Application Circuit

15kΩ

8Ω or 32Ω

EXTERNAL COMPONENTS DESCRIPTION (Fig. 1)

COMPONENTS

FUNCTIONAL DESCRIPTION

Inverting input resistance which sets the closed-loop gain in conjunction with RF. This resistor

also forms a high pass filter with CI at fC = 1/(2πRICI).

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

creates a high pass filter with RI at fC = 1/(2πRICI).

Feedback resistance which sets closed-loop gain in conjunction with RI.

Supply bypass capacitor which provides power supply filtering.

Bypass pin capacitor which provides half-supply filtering.

Output coupling capacitor which blocks the DC voltage at the amplifier’s output. Forms a high

pass filter with RL at fO = 1/(2πRLCO).

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