- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383990 > TDA9874APS (NXP SEMICONDUCTORS) Digital TV sound demodulator/decoder PDF資料下載
參數(shù)資料
| 型號： | TDA9874APS |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | Digital TV sound demodulator/decoder |
| 中文描述： | AM/FM, AUDIO DEMODULATOR, PDIP42 |
| 封裝： | 0.600 INCH, SHRINK, PLASTIC, MS-020, SOT-270-1, DIP-42 |
| 文件頁數(shù)： | 14/68頁 |
| 文件大?。?/td> | 231K |
| 代理商： | TDA9874APS |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁當前第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁
1999 Dec 03
14
Philips Semiconductors
Preliminary specification
Digital TV sound demodulator/decoder
TDA9874A
6.3
Description of the analog audio section
6.3.1
A
NALOG CROSSBAR SWITCH AND ANALOG MATRIX
The TDA9874A has one external analog stereo input, one
mono input, one 2-channel and one single-channel output
port. Analog source selector switches are employed to
provide the desired analog signal routing capability, which
is done by the analog crossbar switch section.
The basic signal routing philosophy of the TDA9874A is
that each switch handles two signal channels at the same
time (e.g. left and right, language A and B) directly at the
source. For an overview of the signal flow see Fig.7.
Each source selector switch is followed by an analog
matrix to perform further selection tasks, such as putting a
signal from one input channel, say language A, to both
output channels or for swapping left and right channels.
The analog matrix provides the functions given in Table 5.
Automatic matrixing for TV applications is also supported.
All switches and matrices are controlled via the I
2
C-bus.
Table 5
Analog matrix functions
6.3.2
E
XTERNAL AND MONO INPUTS
The external and mono inputs accept signal levels of up to
1.4 V (RMS). By adding external series resistors to
provide suitable attenuation, the external input could be
used as a SCART input. Whenever the external or mono
input is selected, the output of the DAC is muted to
improve the crosstalk performance.
6.3.3
A
UDIO
DAC
S
The TDA9874A comprises a 2-channel audio DAC and an
additional single-channel audio DAC for feeding signals
fromtheDSPsection to theanalogcrossbarswitch.These
DACs have a resolution of 15 bits and employ four-times
oversampling and noise shaping.
6.3.4
A
UDIO OUTPUT BUFFERS
The output buffers provide a gain of 0 dB and offer a
muting possibility. The post filter capacitors of the audio
DACs are connected to the buffer outputs.
6.3.5
S
TANDBY MODE
The standby mode (see Section 10.3.3) disables most
functions and reduces power dissipation of the
TDA9874A. It provides no other function.
Internal registers may lose their information in standby
mode. Therefore, the device needs to be initialized on
returningtonormaloperation.Thiscanbeaccomplishedin
the same way as after a Power-on reset.
MODE
MATRIX OUTPUT
L OUTPUT
R OUTPUT
1
2
3
4
L input
R input
L input
R input
R input
L input
L input
R input
handbook, full pagewidth
MHB589
OUTR
source select
matrix
mono (AM)
EXTIL
EXTIR
DACL
DACR
DACM
OUTL
OUTM
Fig.6 Switch diagram for the analog audio section.
相關PDF資料 |
PDF描述 |
|---|---|
| TDCS6440G | SONET/SDH 40 Gbits/s Cross Connect( SONET/SDH 40G位/秒交叉連接器件) |
| TDK5100F | 434 MHz ASK/FSK Transmitter in 10-pin Package |
| TDK5100 | ASK/FSK Transmitter 868/433 MHz |
| TE28F004S3-150 | BYTE-WIDE SMART 3 FlashFile MEMORY FAMILY 4, 8, AND 16 MBIT |
| TE28F008S3-150 | BYTE-WIDE SMART 3 FlashFile MEMORY FAMILY 4, 8, AND 16 MBIT |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9874H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV sound demodulator/decoder |
| TDA9875 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV Sound Processor DTVSP |
| TDA9875A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV Sound Processor DTVSP |
| TDA9875AH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV Sound Processor DTVSP |
| TDA9875AH/V2,557 | 功能描述:IC SOUND PROC DGTL TV 64QFP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:- 其它有關文件:STA321 View All Specifications 標準包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應用:數(shù)字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應商設備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
發(fā)布緊急采購，3分鐘左右您將得到回復。