- 您现在的位置：买卖IC网 > PDF目录98195 > TDA7407TR (STMICROELECTRONICS) SPECIALTY CONSUMER CIRCUIT, PQFP44 PDF资料下载
参数资料
| 型号： | TDA7407TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封装： | 10 X 10 MM, 1.40 MM HEIGHT, LQFP-44 |
| 文件页数： | 14/46页 |
| 文件大小： | 692K |
| 代理商： | TDA7407TR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页
Obsolete
Product(s)
- Obsolete
Product(s)
TDA7407
Multipath detector
5.1
Description of the audioprocessor part
5.1.1
Input multiplexer
●
CD quasi differential
●
Cassette stereo
●
Phone differential
●
AM mono
●
Stereo decoder input.
5.1.2
Input stages
Most of the input stages have remained the same as in preceeding ST audioprocessors with
the exception of the CD inputs (see Figure 7). In the meantime there are some CD players
on the market having a significant high source impedance which strongly affects 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 output of the CD stage is permanently available of the CD out-pins
5.1.3
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.
This stage is located before the volume block to eliminate all offsets generated by the stereo
decoder, the input stage and the In-Gain (please notice that externally generated offsets,
e.g. generated through the leakage current of the coupling capacitors, are not cancelled).
Auto-zeroing is started every time the DATA-BYTE 0 is selected and takes a time of max.
0.3ms. To avoid audible clicks the audioprocessor is muted before the volume stage during
this time.
5.1.4
AutoZero remain
In some cases, for example if the
μP 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
TDA7407 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.
5.1.5
Multiplexer output
The output signal of the input multiplexer is available at separate pins (please see the block
diagram). This signal represents the input signal amplifier by the In-Gain stage and is also
going into the mixer stage.
相关PDF资料 |
PDF描述 |
|---|---|
| TDA7407 | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| TDA7409D | 1 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20 |
| TDA7410NDTR | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20 |
| TDA7410ND | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20 |
| TDA7410 | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA7409 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:CARRADIO-SIGNAL-PROCESSOR |
| TDA7409D | 功能描述:音频 DSP INFOTAINMENT SIGNAL 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 |
| TDA7409DTR | 功能描述:音频 DSP INFOTAINMENT SIGNAL 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 |
| TDA7410D | 制造商:STMicroelectronics 功能描述: |
| TDA7410ND | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Signal processor for car radio applications |
发布紧急采购，3分钟左右您将得到回复。