TDA7498MV View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7498MV' PDF : 27 Pages View PDF
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
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DocID016505 Rev 6
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