TS472 datasheet(3/25 Pages) STMICROELECTRONICS

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TS472

Typical application schematic

Doc ID 11015 Rev 6

3/25

Typical application schematic

Figure 1 shows a typical application schematic for the TS472.

Figure 1.

Application schematic (flip-chip)

Table 1.

Description of external components

Components

Functional description

Cin+, Cin-

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

terminal.

Cout+, Cout-

Output coupling capacitors that block the DC voltage coming from the

amplifier output terminal (pins C2 and D2) and determine the lower cut-off

frequency (see Section 4.3: Lower cut-off frequency).

Rout+, Rout-

Output load resistors used to charge the output coupling capacitors Cout.

These output resistors can be represented by an input impedance of a

following stage.

Rpos, Rneg

Polarizing resistors for biasing of a microphone.

Supply bypass capacitor that provides power supply filtering.

Bypass pin capacitor that provides half-supply filtering.

C1, C2

Low pass filter capacitors allowing to cut the high frequency.

Bias output filtering capacitor.

VCC

Electret Mic

Rpos

Rneg

Standby Control

Positive Output

Negative Output

1uF

Cin+

Cin-

Cout+

Cout-

Rout+

Rout-

Bias

IN-

IN+

OUT+

OUT-

GAIN

BYPASS

BIAS

Vcc

SELECT

2.0V

TS472_FC

Optional

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