参数资料
型号: TDA7498MVTR
厂商: STMICROELECTRONICS
元件分类: 音频/视频放大
英文描述: 100 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO36
封装: ROHS COMPLIANT, SSOP-36
文件页数: 13/27页
文件大小: 779K
代理商: TDA7498MVTR
Applications information
TDA7498MV
20/27
Doc ID 16505 Rev 2
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.
5.4
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 = 470 nF the high-pass filter cut-off frequency is below 20 Hz:
fC = 1 / (2 * π * Ri * Ci)
Figure 21.
Input circuit and frequency response
Table 8.
Gain settings
GAIN0
GAIN1
Nominal gain, Gv (dB)
LL25.6
LH
31.6
HL
35.6
HH37.6
Ri
Input
Ci
Rf
Input
pin
signal
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