參數(shù)資料
型號(hào)： TDA7419TR
廠商： STMICROELECTRONICS
元件分類： 音頻控制
英文描述： 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
封裝： SO-28
文件頁(yè)數(shù)： 8/40頁(yè)
文件大?。?/td> 698K
代理商： TDA7419TR
Description of the audio processor
TDA7419
Figure 3.
Input stage
4.3
AutoZero
The AutoZero allows a reduction of the number of pins as well as external components by
canceling any offset generated by or before the In-Gain-stage (Please notice that externally
generated offsets, e.g. generated through the leakage current of the coupling capacitors,
are not canceled).
The auto-zeroing is started every time the input source is changed and needs max. 0.3ms
for the alignment. To avoid audible clicks the Audio processor is muted before the loudness
stage during this time. The AutoZero feature is only present in the main signal-path.
4.3.1
AutoZero remain
In some cases, for example if the P is executing a refresh cycle of the I2C bus
programming, it is not useful to start a new AutoZero action because no new source is
selected and an undesired mute would appear at the outputs. For such applications, it can
be switched in the AutoZero remain mode (bit 6 of the subaddress byte). If this bit is set to
high, the AutoZero will not be invoked and the old adjustment-value remains.
4.4
Loudness
There are four parameters programmable in the loudness stage:
4.4.1
Attenuation
Figure 4 shows the attenuation as a function of frequency at fP = 400 Hz
Output Stage
QD
QD_L
QD_R
QD_G
SE3
SE2
SE2_L
SE2_R
QD
SE1
SE2
SE3
Main
Source
Second
Source
In Gain
SE1
SE1_L
SE1_R
AC2IN_L/SE3L
AC2IN_R/SE3R
SE4
相關(guān)PDF資料
PDF描述
TDA7419 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
TDA7420 SPECIALTY CONSUMER CIRCUIT, PQFP64
TDA7421N AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64
TDA7421 AUDIO SINGLE CHIP RECEIVER, PQFP64
TDA7427AAD1 PLL FREQUENCY SYNTHESIZER, 200 MHz, PDSO28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA7420 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MULTIFUNCTIONAUDIO PROCESSOR
TDA7421 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:AM/FM TUNER FOR CAR RADIO AND Hi-Fi APPLICATIONS
TDA7421N 制造商:ST 功能描述:AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS
TDA7427 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER
TDA7427A 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER
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