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參數(shù)資料
| 型號： | TDA9819T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | Multistandard vision and sound-IF PLL with DVB-IF processing |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO32 |
| 封裝： | 7.5 MM, PLASTIC, SO-24 |
| 文件頁數(shù)： | 19/40頁 |
| 文件大?。?/td> | 267K |
| 代理商： | TDA9819T |
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1998 Jul 14
19
Philips Semiconductors
Product specification
Multistandard vision and sound-IF PLL with
DVB-IF processing
TDA9819
13. The intermodulation figures are defined:
V
at 3.58 MHz
0
at 0.92 MHz
V
at 3.58 MHz
V
0
at 2.76 MHz
;
α
0.92
value at 0.92 MHz referenced to black/white signal;
;
α
2.76
value at 2.76 MHz referenced to colour carrier.
14. Sound carrier ON; SIF SAW filter L9453; f
video
= 10 kHz to 10 MHz.
15. Response speed valid for a VIF input level range of 200
μ
V up to 70 mV.
16. To match the AFC output signal to different tuning systems a current source output is provided. The test circuit is
given in Fig.7. The AFC-steepness can be changed by the resistors at pin 23.
17. Depending on the ratio
C/C
0
of the LC resonant circuit of VCO (Q
0
>
50; C
0
= C
int
+ C
ext
; see Fig.12).
18. The intercarrier mode can be activated by connecting the SIF input pins 31 and 32 to GND (only for negative
modulation B/G and M standard). In this event the intercarrier level depends on the sound shelf of VIF SAW filter and
the transmitter PC/SC ratio.
19. Input level for second IF from an external generator with 50
source impedance. AC-coupled with 10 nF capacitor,
f
mod
= 400 Hz, 25 kHz (50% FM deviation) of audio references. A VIF/SIF input signal is not permitted. Pins 8 and 28
have to be connected to positive supply voltage for minimum IF gain. S/N and THD measurements are taken at 75
μ
s
de-emphasis. The FM demodulator steepness
V
o AF
/
f
AF
is negative.
20. Measured with an FM deviation of 25 kHz the typical AF output signal is 500 mV RMS (R
x
= 0
; see Fig.12). By
using R
x
= 470
the AF output signal is attenuated by 6 dB (250 mV RMS). For handling an FM deviation of more
than 53 kHz the AF output signal has to be reduced by using R
x
in order to avoid clipping (THD < 1.5%). For an FM
deviation up to 100 kHz an attenuation of 6 dB is recommended with R
x
= 470
.
21. The leakage current of the decoupling capacitor (2.2
μ
F) should not exceed 1
μ
A.
22. For all S/N measurements the used vision IF modulator has to meet the following specifications:
Incidental phase modulation for black-to-white jump less than 0.5 degrees;
QSS AF performance, measured with the television-demodulator AMF2 (audio output, weighted S/N ratio) better
than 60 dB (deviation 25 kHz) for 6 kHz sine wave black-to-white video modulation.
23. The PC/SC ratio at pins 1 and 2 is calculated as the addition of TV transmitter PC/SC ratio and SAW filter PC/SC
ratio. This PC/SC ratio is necessary to achieve the S/N(W) values as noted. A different PC/SC ratio will change these
values.
24. Measurements for M standard with SAW filter M3951M (Siemens) for vision IF (suppressed sound carrier) and
M9352M (Siemens) for sound IF (suppressed picture carrier). Input level V
i SIF
= 10 mV RMS, 25 kHz FM deviation.
Measurements for B/G standard with SAW filter G3962 (Siemens) for vision IF (suppressed sound carrier) and
G9350 (Siemens) for sound IF (suppressed picture carrier). Input level V
i SIF
= 10 mV RMS, 27 kHz
(54% FM deviation).
α
0.92
20
V
3.6dB
+
log
=
α
2.76
20
--------------------------------------
log
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA9819 | Multistandard Vision And Sound-IF PLL With DVB-IF Processing(帶數(shù)字視頻廣播-中頻（DVB-IF）處理的多標(biāo)準(zhǔn)視覺及聲音-中頻（IF）的 PLL) |
| TDA9820 | Multistandard/dual channel TV FM intercarrier sound demodulator(多標(biāo)準(zhǔn)/雙頻道TV FM內(nèi)載波音解調(diào)器) |
| TDA9820T | Multistandard/dual channel TV FM intercarrier sound demodulator |
| TDA9821 | dual channel TV FM intercarrier sound demodulator(雙頻道TV FM內(nèi)載波音解調(diào)器) |
| TDA9830T | TV sound AM-demodulator and audio source switch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9820 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard/dual channel TV FM intercarrier sound demodulator |
| TDA9820T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard/dual channel TV FM intercarrier sound demodulator |
| TDA9820T/V1,112 | 制造商:NXP Semiconductors 功能描述:MULTISTD TV FM SOUND DEMOD - Rail/Tube |
| TDA9821 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual channel TV FM intercarrier sound demodulator |
| TDA9829T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Downconverter for DVB |
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