Typical Application Schematic

TS472

2/20

1

Typical Application Schematic

Figure 1 shows a typical application schematic for the TS472 with gain = 20dB. To change the

gain see

Chapter 4.5: Gain settings on page 14.

Table 1.

External component descriptions

Figure 1.

Application schematic

Components

Functional Description

Cin+, Cin-

Input coupling capacitors which blocks the DC voltage at the amplifier input terminal

and determine

Lower cut-off frequency.

Cout+, Cout-

Output coupling capacitors which blocks the DC voltage coming from the amplifier

output terminal (pins C2 and D2) and determine

Lower cut-off frequency.

Rout+, Rout-

Output load resistors which allow to charged the output coupling capacitors Cout.

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

stage.

Rpos, Rneg

Microphone biasing resistors

Cs

Supply Bypass capacitor which provides power supply filtering.

Cb

Bypass pin capacitor which provides half supply filtering.

C1, C2

Low pass filter capacitors which can determine

Higher cut-off frequency.

C3

Bias output capacitor which keeps voltage stabilized and provides 2.0V bias filtering.

VCC

Electret Mic

Rpos

Rneg

Standby Control

Positive Output

Negative Output

1uF

Cb

1uF

Cs

1uF

C3

C1

C2

Cin+

Cin-

+

Cout+

Cout-

Rout+

Rout-

Bias

IN-

IN+

G

OUT+

OUT-

GAIN

BYPASS

BIAS

Vcc

SELECT

C2

D2

B2

D1

A2

B1

A1

2.0V

U1

TS472

Optional