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參數(shù)資料
| 型號： | TDA9853 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | I2C-bus controlled economic BTSC stereo decoder and audio processor |
| 中文描述： | 的I2C控制的經(jīng)濟BTSC立體聲解碼器和音頻處理器總線 |
| 文件頁數(shù)： | 7/28頁 |
| 文件大小： | 147K |
| 代理商： | TDA9853 |
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2000 Dec 11
7
Philips Semiconductors
Product specification
I
2
C-bus controlled economic BTSC stereo
decoder and audio processor
TDA9853H
handbook, full pagewidth
TDA9853H
MHB790
1
2
3
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9
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11
33
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1
1
1
1
1
1
1
1
2
2
2
4
4
4
4
4
3
3
3
3
3
3
n
C
C
V
S
M
S
D
A
F
n
n
T
T
B
O
n
O
B
T
T
n
n.c.
CP2
CP1
COMP
CMO
CSS
RFR
LIL
LOL
VIL
VAL
FDO
BPU
CW
TW
CAV
VCAP
Vref
LIR
LOR
VIR
VAR
Fig.2 Pin configuration.
FUNCTIONAL DESCRIPTION
Stereo decoder
The composite signal is fed into a pilot detector/pilot
cancellation circuit and into the MPX demodulator. The
main L + R signal passes a 75
μ
s fixed de-emphasis filter
andisfedintothedematrixcircuit.Thedecodedsub-signal
L
R is applied to the Volume Controlled Amplifier (VCA)
circuit. To generate the pilot signal the stereo demodulator
uses a PLL circuit including a ceramic resonator.
Mode selection
The L
R signal is fed via the internal VCA circuit to the
dematrix/switching circuit. Mode selection is achieved via
the I
2
C-bus (see Table 9).
The dematrix outputs can be muted via the I
2
C-bus
(see Table 14).
Automatic volume level control
The automatic volume level stage controls its output
voltage to a constant level of typically 200 mV (RMS) from
an input voltage range between 0.1 to 1.1 V (RMS). The
circuitadjustsvariationsinmodulationduringbroadcasting
and because of changes in the programme material; this
function can be switched off. To avoid audible plops during
the permanent operation of the AVL circuit a soft blending
scheme has been applied between the different gain
stages. A capacitor (4.7
μ
F) at pin C
AV
determines the
attack and decay time constants. In addition the ratio of
attack and decay times can be changed via the I
2
C-bus.
Integrated filters
The filter functions necessary for stereo demodulation are
provided on-chip using transconductor circuits. The filter
frequencies are controlled by the filter reference circuit via
the external resistor R4.
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| TDA9855 | I2C-bus controlled BTSC stereo/SAP decoder and audio processor |
| TDA9855WP | I2C-bus controlled BTSC stereo/SAP decoder and audio processor |
| TDA9859 | Universal hi-fi audio processor for TV |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9853H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:I2C-bus controlled economic BTSC stereo decoder and audio processor |
| TDA9853HV1 | 制造商:PHILIPS 功能描述:New |
| TDA9855 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:I2C-bus controlled BTSC stereo/SAP decoder and audio processor |
| TDA9855/V2,112 | 功能描述:音頻放大器 BTSC STEREO DECODER RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA9855N | 功能描述:音頻放大器 BTSC STEREO DECODER DBXTV/AUD RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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