- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄365782 > TDA9812 (NXP SEMICONDUCTORS) Multistandard VIF-PLL andFM-PLL/AM demodulator(多標準的VIF-PLL 和FM-PLL/AM解調(diào)器) PDF資料下載
參數(shù)資料
| 型號： | TDA9812 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | Multistandard VIF-PLL andFM-PLL/AM demodulator(多標準的VIF-PLL 和FM-PLL/AM解調(diào)器) |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP32 |
| 封裝： | 0.400 INCH, SHRINK, PLASTIC, SOT-232-1, DIP-32 |
| 文件頁數(shù)： | 18/32頁 |
| 文件大?。?/td> | 272K |
| 代理商： | TDA9812 |
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頁第14頁第15頁第16頁第17頁當前第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
1995 Mar 21
18
Philips Semiconductors
Preliminary specification
Multistandard VIF-PLL and
FM-PLL/AM demodulator
TDA9812
12. The intermodulation figures are defined:
α
1.1
= 20 log (V
0
at 4.4 MHz/V
0
at 1.1 MHz) + 3.6 dB;
α
1.1
value at 1.1 MHz
referenced to black/white signal;
α
3.3
= 20 log (V
0
at 4.4 MHz/V
0
at 3.3 MHz);
α
3.3
value at 3.3 MHz referenced to
colour carrier.
13. Response speed valid for a VIF input level range of 200
μ
V up to 70 mV.
14. To match the AFC output signal to different tuning systems a current source output is provided. The test circuit is
given in Fig.12. The AFC-steepness can be changed by the resistors at pin 23.
15. Depending on the ratio
C/C
0
of the LC resonant circuit of VCO (Q > 50; see note 3; C
0
= C
int
+ C
ext
).
16. Source impedance: 2.3 k
in parallel to 12 pF (SAW filter); f
IF
= 38.9 MHz.
17. The intercarrier output signal at pin 20 can be calculated by the following formula taking into account the video output
signal at pin 21 (V
o video(p-p)
= 1 V typical) as a reference:
V
×
=
with
= correction term for RMS value,
= sound-to-picture carrier ratio at VIF input (pins 1 and 2) in dB,
6 dB = correction term of internal circuitry
and
±
3 dB = tolerance of video output and intercarrier output amplitude V
o(rms)
.
Example: SAW filter G1962 (sound shelf: 20 dB)
V
o(rms)
= 32 mV typical.
18. Input level for second IF from an external generator with 50
source impedance. AC-coupled with 10 nF capacitor,
f
mod
= 1 kHz, 27 kHz (54% 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 50
μ
s
de-emphasis.
Second IF input level 10 mV RMS.
19. Measured with an FM deviation of 27 kHz the typical AF output signal is 500 mV RMS (R
x
= 0
; see Fig.17). 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
.
20. The leakage current of the decoupling capacitor (2.2
μ
F) should not exceed 1
μ
A.
21. 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.
Picture-to-sound carrier ratio; PC/SC = 13 dB; (transmitter).
Sound shelf of VIF SAW filter: minimum 20 dB.
22. Measurements taken with SAW filter K6256 (Siemens) for vision and sound IF (sound shelf: 20 dB). Input level
V
i SIF
= 10 mV RMS, 27 kHz (54% FM deviation).
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 taken with SAW filter L9453 (Siemens) for AM sound IF (suppressed picture carrier).
25. The input voltage has to be V > 2.8 V, or open-circuit.
V
o rms
)
1V
p
p
–
(
)
2 2
----------
×
10
-----------
dB
--------------------------------------------------------------
(
)
6 dB
3 dB
±
+
2 2
----------
V
V
iPC
-----------
dB
(
)
V
V
iPC
-----------
27 dB
–
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA9812T | Multistandard VIF-PLL and FM-PLL/AM demodulator |
| TDA9813T | VIF-PLL with QSS-IF and dual FM-PLL demodulator(帶QSS-IF和雙路FM-PLL解調(diào)器的VIF-PLL) |
| TDA9814T | Multistandard VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator(帶QSS-IF和雙路FM-PLL/AM解調(diào)器的多標準VIF-PLL) |
| TDA9814 | Multistandard VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator |
| TDA9815 | Multistandard/MAC VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator(帶QSS-IF和雙路FM-PLL/AM解調(diào)器的多標準/媒體存取控制 VIF-PLL) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9812T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard VIF-PLL and FM-PLL/AM demodulator |
| TDA9813T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:VIF-PLL with QSS-IF and dual FM-PLL demodulator |
| TDA9814 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator |
| TDA9814T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator |
| TDA9815 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard/MAC VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。