Figure 21. Standby and mute circuits

STBY

MUTE

0 V

3.3 V

C7

2.2 µF

R2

30 kΩ

Standby

0 V

3.3 V

C15

2.2 µF

R4

30 kΩ

Mute

TDA7498L

Figure 22. Turn on/off sequence for minimizing speaker “pop”

5.3

Gain settings

The gain of the TDA7498L is set by the two inputs, GAIN0 (pin 30) and GAIN1 (pin31). Internally, the gain is set

by changing the feedback resistors of the amplifier.

Table 7. Gain settings

GAIN0

GAIN1

Nominal gain, Gv (dB)

L

L

25.6

L

H

31.6

H

L

35.6

H

H

37.6

TDA7498L

Gain settings

DS6539 - Rev 6

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