TDA7498MVTR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TDA7498MVTR

100 W mono BTL class-D audio amplifier

STMicroelectronics 

Application information

TDA7498MV

5.3

Gain setting

The gain of the TDA7498MV 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.

GAIN0

L

L

H

H

Table 8: Gain settings

GAIN1

L

H

L

H

Nominal gain, Gv (dB)

25.6

31.6

35.6

37.6

5.4

Input resistance and capacitance

The input impedance is set by an internal resistor Ri = 60 kΩ (typical). An input capacitor

(Ci) is required to couple the AC input signal.

The equivalent circuit and frequency response of the input components are shown in

Figure 21: "Input circuit and frequency response". For Ci = 470 nF the high-pass filter cutoff

frequency is below 20 Hz:

fC = 1 / (2 * π * Ri * Ci)

Figure 21: Input circuit and frequency response

18/26

DocID016505 Rev 6

Share Link: