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TDA7491MV Folha de dados(PDF) 21 Page - STMicroelectronics

Nome de Peças TDA7491MV
Descrição Electrónicos  25 W mono BTL class-D audio amplifier
PDF  28 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7491MV Folha de dados(HTML) 21 Page - STMicroelectronics

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TDA7491MV
Application information
28
7.2
Gain setting
The gain of the TDA7491MV is set by the two inputs, GAIN0 (pin 30) and GAIN1 (pin 31).
Internally, the gain is set by changing the feedback resistors of the amplifier.
7.3
Input resistance and capacitance
The input impedance is set by an internal resistor Ri = 60 k
 (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. For Ci = 220 nF the high-pass filter cut-off frequency is below 20 Hz:
fc = 1 / (2 *
 * Ri * Ci)
Figure 21. Device input circuit and frequency response
Table 8. Gain settings
GAIN0
GAIN1
Nominal gain, Gv (dB)
00
20
01
26
10
30
11
32
Ri
Input
Ci
Rf
Input
pin
signal



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