TS4998IQT datasheet(3/33 Pages) STMICROELECTRONICS

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TS4998

Typical application schematics

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Typical application schematics

Figure 1 shows a typical application for the TS4998 with a gain of +6dB set by the input

resistors.

Figure 1.

Typical application schematics

Table 1.

External component descriptions

Components

Functional description

RIN

Input resistors that set the closed loop gain in conjunction with a fixed internal

feedback resistor (Gain = Rfeed/RIN, where Rfeed = 50kΩ).

CIN

Input coupling capacitors that block the DC voltage at the amplifier input

terminal. Thanks to common mode feedback, these input capacitors are

optional. However, if they are added, they form with RIN a 1st order high pass

filter with -3dB cut-off frequency (fcut-off = 1 / (2 x π x RIN x CIN)).

Supply bypass capacitors that provides power supply filtering.

Bypass pin capacitor that provides half supply filtering.

Cin1

330nF

1uF

Rin1

25k

Rin2

25k

Rin3

25k

Rin4

25k

Cin2

330nF

Cin3

330nF

Cin4

330nF

VCC

Left Speaker

8 Ohms

Right Speaker

8 Ohms

Diff. input L-

Diff. input L+

Diff. input R-

Diff. input R+

Optional

BIAS

STBY

LEFT

RIGHT

LIN-

RIN-

LIN+

RIN+

Bypass

GND

LOUT-

LOUT+

ROUT-

ROUT+

Vcc

TS4998

TS4998 - QFN16

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