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參數(shù)資料
| 型號： | TDA7333 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | RDS/RBDS PROCESSOR |
| 中文描述： | 鐵路發(fā)展策略/無線廣播數(shù)據(jù)處理器 |
| 文件頁數(shù)： | 5/21頁 |
| 文件大?。?/td> | 656K |
| 代理商： | TDA7333 |
5/21
TDA7333
7
Functional Description
7.1 Overview
The new RDS/RBDS processor contains all RDS/RBDS relevant functions on a single chip. It recovers the
inaudible RDS/RBDS information which are transmitted on most FM radio broadcasting stations.
Due to an integrated 3rd order sigma delta converter, which samples the MPX signal, all further processing
is done in the digital domain and therefore very economical. After filtering the highly oversampled output
of the A/D converter, the RDS/RBDS demodulator extracts the RDS DataClock , RDS Data Signal and
the Quality information. A next RDS/RBDS decoder will synchronize the bitwise RDS stream to a group
and block wise information. This processing includes an error detection and error correction algorithm. In
addition, an automatic flywheel control avoids exhaustive data exchange between the RDS/RBDS proces-
sor and the host.
The device operates in accordance with the EBU (European Broadcasting Union) specifications.
7.2 Sigma Delta Converter
The Sigma Delta Modulator is a 3rd order (second order-first order cascade) structure. Therefore a multibit out-
put (2 bit streams) represents the analog input signal. A next digital noise canceller will take the 2 bit streams
and calculates a combined stream which is then fed to the decimation filter. The modulator works at a sampling
frequency of XTI/2. The oversampling factor in relation to the band of interest (57 kHz +- 2.4 kHz) is 38.
7.3 Sinc4/16 Decimation Filter
The oversampled data delivered from the modulator are decimated by a value of 16 with a 4th order Sinc Filter.
This is considered to be the optimum solution for high decimation factors and for a 3rd order sigma delta mod-
ulator.
Symbol
Parameter
Test Conditions
Values
Typ.
Unit
Min.
-0.5
Max.
+0.5
R
p
f
stop
R
s
M
i
Passband Ripple
dB
Stopband Corner Frequencies
53.0
61
kHz
Stopband Attenuation
-43
dB
Interpolation Factor
32
I
2
C
f
I2C
clock frequency in I
2
C mode
400
kHz
SPI
f
SPI
t
ch
t
cl
t
csu
t
csh
t
odv
t
oh
t
d
t
su
t
h
clock frequency in SPI mode
1
MHz
clock high time
450
ns
clock low time
450
ns
chip select setup time
500
ns
chip select hold
500
ns
output data valid
250
ns
output hold
0
ns
deselect time
1000
ns
data setup time
200
ns
data hold time
200
ns
Table 6. Electrical Characteristics
(continued)
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| TDA7334 | LOW NOISE STEREO PREAMPLIFIER |
| TDA7334D | LOW NOISE STEREO PREAMPLIFIER |
| TDA7335 | STEREO PREAMP AMS DOLBY B* NOISE REDUCTION PROCESSOR |
| TDA7336 | STEREO PREAMP+ AMS+ DOLBY B* NOISE REDUCTION PROCESSOR |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7333013TR | 功能描述:音頻 DSP RDS/RBDS PROCESSOR RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7333N | 功能描述:音頻放大器 RDS/RBDS processor Demodulation 3.3V 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 |
| TDA7333NTR | 功能描述:音頻放大器 RDS/RBDS processor Demodulation 3.3V 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 |
| TDA7334 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW NOISE STEREO PREAMPLIFIER |
| TDA7334D | 功能描述:音頻放大器 Stereo Preamplifier 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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