Figure 9: Output Noise vs. Source Resistance

Figure 10: Power Dissipation & Efficiency vs.

Output Power

Ω)

INPUT STAGE

The TDA7382’S inputs are ground-compatible

and can stand very high input signals (

± 8Vpk)

without any performances degradation.

If the standard value for the input capacitors

(0.1

µF) is adopted, the low frequency cut-off will

amount to 16 Hz.

STAND-BY AND MUTING

STAND-BY and MUTING facilities are both

CMOS-COMPATIBLE. If unused, a straight con-

nection to Vs of their respective pins would be ad-

missible. Conventional low-power transistors can

be employed to drive muting and stand-by pins in

absence of true CMOS ports or microprocessors.

R-C cells have always to be used in order to

smooth down the transitions for preventing any

audible transient noises.

Since a DC current of about 10 uA normally flows

out of pin 22, the maximum allowable muting-se-

Ω, which is sufficiently

high to permit a muting capacitor reasonably

small (about 1

µF).

risk will be that the voltage at pin 22 may rise to

above the 1.5 V threshold voltage and the device

will consequently fail to turn OFF when the mute

line is brought down.

About the stand-by, the time constant to be as-

+

-

0.1

µF

C1

÷ C4

+

-

8K

Ω

8K

Ω

400

Ω

400

Ω

100K

Ω

100K

Ω

70K

Ω

IN

D95AU302

TOWARDS

OTHER CHANNELS

10K

Ω

10K

Ω

47

µF

C6

0.1

µF

C5

SVR

AC_GND

Figure 11: Input/OutputBiasing.

TDA7382

7/10