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TDA7498L Folha de dados(PDF) 20 Page - STMicroelectronics

Nome de Peças TDA7498L
Descrição Electrónicos  80 watt 80 watt dual BTL class-D audio amplifier
PDF  27 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7498L Folha de dados(HTML) 20 Page - STMicroelectronics

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Applications information
TDA7498L
20/27
Doc ID 16504 Rev 3
5.3
Gain setting
The gain of the TDA7498L 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.
5.4
Input resistance and capacitance
The input impedance is set by an internal resistor Ri = 60 k
Ω (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 23. For Ci = 470 nF the high-pass filter cutoff frequency is below 20 Hz:
fC = 1 / (2 * π * Ri * Ci)
Figure 23.
Input circuit and frequency response
Table 8.
Gain settings
GAIN0
GAIN1
Nominal gain, Gv (dB)
LL
25.6
LH
31.6
HL
35.6
HH
37.6
Ri
Input
Ci
Rf
Input
pin
signal



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