- 您現(xiàn)在的位置：買賣IC網 > PDF目錄371183 > TDA9802 (NXP SEMICONDUCTORS) Multistandard VIF-PLL demodulator and FM-PLL detector PDF資料下載
參數資料
| 型號： | TDA9802 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | Multistandard VIF-PLL demodulator and FM-PLL detector |
| 中文描述： | AUDIO/VIDEO DEMODULATOR, PDIP20 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-20 |
| 文件頁數： | 12/23頁 |
| 文件大?。?/td> | 196K |
| 代理商： | TDA9802 |
November 1992
12
Philips Semiconductors
Preliminary specification
Multistandard VIF-PLL demodulator and
FM-PLL detector
TDA9802
Notes to the characteristics
1.
Typical values of video and sound parameters are decreased at V
P
= 4.5 V.
2.
The input voltage for negative modulation has to be V
8
>
1.5 V, or pin 8 open-circuit.
3.
Loop bandwidth BL = 60 kHz (natural frequency f
n
= 15 kHz; damping factor d = 2 calculated with grey level and
FPLL input signal level).
Resonance circuit of VCO: Q
o
>
50; C
ext
= 8.2 pF; C
int
≈
8.5 pF (loop voltage about 2.7 V).
4.
The oscillator drift is related to the picture carrier frequency (at external temperature-compensated LC-circuit).
5.
V
i IF
= 10 mV (RMS value);
f = 1 MHz (VCO frequency offset related to picture carrier frequency); white picture
video modulation.
6.
V
i IF
for 0.9 V CVBS (peak-to-peak value) at composite video output pin 13; PLL is still locked.
7.
Transformer at IF input (Fig.3). The C/N ratio at IF input for ‘lock-in’ is defined as the vision IF input signal (sync level,
RMS value) in relation to a superimposed, 5 MHz band-limited white noise signal (RMS value); video modulation:
white picture.
8.
Offset current measured between pin 6 and half of supply voltage (V = 2.5 V) under the following conditions: no input
signal at IF input (pins 1 and 2) and IF-amplifier gain at minimum (V
19
= V
P
), pin 4 (phase adjust) open-circuit.
9.
The intercarrier output signal is superimposed to the video signal at pin 13 and can be calculated by the following
formula:
V
p
p
–
1V p
p
–
)
V
iPC
with
V
V
iPC
and
±
2 dB = tolerance of intercarrier output amplitude V
o FM.
10. Measurements taken with SAW filter G1956; modulation: VSB, f
video
>
0.5 MHz, loop bandwidth BL = 60 kHz.
11. The 7 dB buffer gain accounts for 1 dB loss in the sound trap. Buffer output signal is typical 2 V (p-p). If no sound
trap is applied a 330
resistor must be connected from output to input (from pin 13 to pin 14).
12. The leakage current of the AGC capacitor has to be
<
1
μ
A in B/G mode (
<
30 nA in L mode) to avoid larger tilt.
13. S/N is the ratio of black-to-white amplitude to the black level noise voltage (RMS value, pin 7). B = 5 MHz weighted
in accordance with CCIR-567 at a source impedance of 50
.
14.
α
1.1
= 20 log (V
o
at 4.4 MHz / V
o
at 1.1 MHz) + 3.6 dB;
α
1.1
value at 1.1 MHz related to black/white signal
α
3.3
= 20 log (V
o
at 4.4 MHz / V
o
at 3.3 MHz);
α
3.3
value at 3.3 MHz related to colour carrier.
15. To match the AFC output signal to different tuning systems a current source output is provided (Fig.8).
16. Depending on the radio
C/C
o
of the LC resonance circuit of VCO
(Q
o
>
50; C
o
= C
int
+C
ext
; C
ext
= 8.2 pF; C
int
≈
8.5 pF).
17. No mute state is also valid for pin not connected. For switching on the L-standard no external load is allowed at pin
5 except capacitor C
BL
.
18. A 5.5 MHz signal for second IF with 10 mV (RMS value) input level, f
mod
= 1 kHz and frequency deviation with 54%
FM modulation of audio reference is fed directly to pin 11. Audio measurements are taken at 50
μ
s de-emphasis.
19. To allow higher frequency deviation, the resistor R
x
on pin 10 (see Fig.12) has to be increased to a value which does
not exceed the AF output signal of nominally 0.35 V for THD = 0.1% (R
x
= 4.7 k
provides
6 dB amplification).
20. The leakage current of the 2.2
μ
F capacitor is
<
100 nA.
20
)
------------------------------------------
log
iSC
V
6.9 dB
2 dB
±
+
=
----------- dB
sound to picture carrier ratio at IF input (pins 1 and 2) in dB
=
相關PDF資料 |
PDF描述 |
|---|---|
| TDA9802T | Multistandard VIF-PLL demodulator and FM-PLL detector |
| TDA9806 | Multistandard VIF-PLL and FM-PLL demodulator |
| TDA9808 | Single standard VIF-PLL with QSS-IF and FM-PLL demodulator |
| TDA9808T | Single standard VIF-PLL with QSS-IF and FM-PLL demodulator |
| TDA9809 | Single standard multimedia IF-PLL and FM radio demodulator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TDA9802T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard VIF-PLL demodulator and FM-PLL detector |
| TDA9806 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard VIF-PLL and FM-PLL demodulator |
| TDA9808 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single standard VIF-PLL with QSS-IF and FM-PLL demodulator |
| TDA9808T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single standard VIF-PLL with QSS-IF and FM-PLL demodulator |
| TDA9809 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single standard multimedia IF-PLL and FM radio demodulator |
發(fā)布緊急采購，3分鐘左右您將得到回復。