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参数资料
| 型号： | TDA7460ND |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| 封装： | ROHS COMPLIANT, SOP-20 |
| 文件页数： | 8/49页 |
| 文件大小： | 473K |
| 代理商： | TDA7460ND |
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Description of the audio processor part
TDA7460ND
4.1.2
Input stages
Most of the input circuits are the same as in preceding ST audioprocessors with exception of
the CD inputs (see Figure 4.).In the meantime there are some CD players in the market
having a significant high source impedance which affects strongly the common-mode
rejection of the normal differential input stage. The additional buffer of the CD input avoids
this drawback and offers the full common-mode rejection even with those CD players.
The TDA7460ND can be configured with an additional input; if the AC coupling before the
speaker stage is not used (bit 7 in subaddress 5 set to "1") ACINL and ACINR pins can be
used as an additional stereo input.
4.1.3
AutoZero
In order to reduce the number of pins there is no AC coupling between the In-Gain and the
following stage, so that any offset generated by or before the In-Gain stage would be
transferred or even amplified to the output.
To avoid that effect a special offset cancellation stage called AutoZero is implemented.To
avoid audible clicks the audioprocessor is muted before the loudness stage during this time.
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 the
TDA7460ND could be switched in the "Auto Zero Remain" mode (Bit 6 of the subaddress
byte). If this bit is set to high, the DATABYTE 0 could be loaded without invoking the
AutoZero and the old adjustment value remains.
Figure 4.
Input stages
4.2
Mixing stage
This stage offers the possibility to mix the internal beep or the phone signal to any other
source. Due to the fact that the mixing stage is also located behind the In-Gain stage fine
adjustments of the main source level can be done in this way.
15K
100K
CD
CDGND
15K
-
+
15K
PHONE
PH_GND
15K
-
+
D97AU633A
100K
STEREODECODER
IN GAIN
CASSETTE
AM
MPX
相关PDF资料 |
PDF描述 |
|---|---|
| TDA7460NDTR | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| TDA7461ND | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| TDA7461NDTR | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| TDA7461N | SPECIALTY CONSUMER CIRCUIT, PDIP28 |
| TDA7462D | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA7460NDTR | 功能描述:音频 DSP CARRADIO SIGNAL PROCESSOR RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TDA7461 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:CAR RADIO SIGNAL PROCESSOR |
| TDA7461D | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:CAR RADIO SIGNAL PROCESSOR |
| TDA7461N | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:CAR RADIO SIGNAL PROCESSOR |
| TDA7461N_03 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:CAR RADIO SIGNAL PROCESSOR |
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