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參數資料
| 型號： | TDA9884TS |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | I2C-bus controlled multistandard alignment-free IF-PLL for mobile reception |
| 中文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| 封裝： | 5.30 MM, PLASTIC, SOT-340-1, MO-150, SSOP-24 |
| 文件頁數： | 35/55頁 |
| 文件大?。?/td> | 231K |
| 代理商： | TDA9884TS |
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2003 Nov 28
35
Philips Semiconductors
Product specification
I
2
C-bus controlled multistandard alignment-free
IF-PLL for mobile reception
TDA9884TS
9.
Measurements taken with SAW filter M1963M (sound shelf: 20 dB); loop bandwidth BL = 70 kHz.
a) Modulation Vestigial Side-Band (VSB); sound carrier off; f
video
> 0.5 MHz.
b) Sound carrier on; f
video
= 10 kHz to 10 MHz.
10. AC load; C
L
< 20 pF and R
L
> 1 k
. The sound carrier frequencies (depending on TV standard) are attenuated by
the integrated sound carrier traps (see Figs 15 to 20;
H (s)
is the absolute value of transfer function).
11. The sound carrier trap can be bypassed by switching the I
2
C-bus. In this way the full composite video spectrum
appears at pin CVBS. The amplitude is 1.1 V (p-p).
12. If selected by the I
2
C-bus, the VIF-AGC voltage can be monitored at pin OP2. In this case, the OP2 cannot be used
for the normal port function.
13. The response time is valid for a VIF input level range from 200
μ
V to 70 mV.
a) The fast mode will be activated automatically, if within a time of typically 150
μ
s for mobile mode and 1.2 ms for
normal mode no AGC event occurs. An AGC event is a charge current pulse into the AGC capacitor due to
reaching AGC reference voltage the sync level.
b) The fast mode will be activated automatically, if the black level drops down by half of the sync amplitude.
14. If selected by the I
2
C-bus, pin OP1 can alternatively be used for external AGC control, activated by pin AGCSW.
In this case OP1 cannot be used for normal port function.
15. Pin AFC is usable as AFC output or as SIF-AGC
a) To match the AFC output signal to different tuning systems a current source output is provided. The test circuit is
given in Fig.6. The AFC steepness can be changed by resistors R1 and R2.
b) In mobile mode the internal SIF-AGC is switched to pin AFC. In this case AFC out is disabled.
16. The tolerance of the reference frequency determines the accuracy of the VIF-AFC, FM demodulator centre
frequency and maximum FM deviation.
17. The intercarrier output signal at pin SIOMAD can be calculated by the following formula taking into account the
internal video signal with 1.1 V (p-p) as a reference:
2 2
V
i(PC)
V
and
where:
is the correction term for RMS value,
is the sound-to-picture carrier ratio at pins VIF1 and VIF2
in dB, 6 dB is the correction term of internal circuitry and
±
3 dB is the tolerance of video output and intercarrier output
V
o(intc)(rms)
.
18. For normal operation (with the I
2
C-bus) no DC load at pin SIOMAD is allowed. The second module address (MAD2)
will be activated by the application of a 2.2 k
resistor between pin SIOMAD and ground. If this MAD2 is activated,
also the power-on set-up state activates a VIF frequency of 58.75 MHz.
19. SIF input level is 10 mV (RMS); VIF input level is 10 mV (RMS) unmodulated.
20. Measured with an FM deviation of 25 kHz and the typical AF output voltage of 500 mV (RMS). The AF output signal
canbeattenuatedby6 dBto250 mV (RMS)viatheI
2
C-bus.Forhandlingafrequencydeviationofmorethan55 kHz,
the AF output signal has to be reduced in order to avoid clipping (THD < 1.5 %).
21. The lower limit of the audio bandwidth depends on the value of the capacitor at pin AFD. A value of C
AF
= 470 nF
leads to f
AF(
3dB)
≈
20 Hz and C
AF
= 220 nF leads to f
AF(
3dB)
≈
40 Hz.
V
o(intc)(rms)
1.1
----1
×
10
r
×
=
r
20
V
(
)
6 dB
3 dB
±
+
×
=
2 2
----1
V
i PC
)
)
V
(
)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TDA9884TS/V1 | 功能描述:調節(jié)器/解調器 MOBILE VIF AND SIF DEMODULATOR RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| TDA9884TS/V1,112 | 功能描述:調節(jié)器/解調器 MOBILE VIF AND SIF RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| TDA9884TS/V1,118 | 功能描述:調節(jié)器/解調器 MOBILE VIF AND SIF RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| TDA9884TS/V1/S1,11 | 功能描述:調節(jié)器/解調器 MOBILE VIF AND SIF RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| TDA9884TS/V1/S1,118 | 制造商:NXP Semiconductors 功能描述:PHATDA9884TS/V1/S1.118 MOBILE VIF/SIF |
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