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參數(shù)資料
| 型號： | 935193120112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP32 |
| 封裝： | 0.400 INCH, PLASTIC, SOT-232, SDIP-32 |
| 文件頁數(shù)： | 8/38頁 |
| 文件大小： | 300K |
| 代理商： | 935193120112 |
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1998 Feb 09
16
Philips Semiconductors
Product specication
Multistandard VIF-PLL with QSS-IF and
AM demodulator
TDA9811
4. Loop bandwidth BL = 75 kHz (natural frequency fn = 11 kHz; damping factor d ≈ 3.5; calculated with sync level within
gain control range). Resonance circuit of VCO: Q0 > 50; Cext = 8.2 pF ±0.25 pF; Cint ≈ 8.5 pF (loop voltage
approximately 2.7 V).
5. Temperature coefficient of external LC-circuit is equal to zero.
6. ViIF = 10 mV RMS; f = 1 MHz (VCO frequency offset related to picture carrier frequency); white picture
video modulation.
7. ViIF signal for nominal video signal.
8. Measurements taken with SAW filter G3962 (sound carrier suppression: 40 dB); loop bandwidth BL = 75 kHz:
a) Modulation VSB; sound carrier off; fvideo > 0.5 MHz.
b) Sound carrier on; SIF SAW filter L9453; fvideo = 10 kHz to 10 MHz.
9. The 7 dB buffer gain accounts for 1 dB loss in the sound trap. Buffer output signal is typical 2 V (p-p), in event of
CVBS video amplifier output typical 1 V (p-p). If no sound trap is applied a 330
resistor must be connected from
output to input (from pin 21 to pin 22).
10. The leakage current of the AGC capacitor should not exceed 1
A at B/G standard respectively 10 nA current at
L standard. Larger currents will increase the tilt.
11. S/N is the ratio of black-to-white amplitude to the black level noise voltage (RMS value, pin 10). B = 5 MHz weighted
in accordance with
“CCIR 567”.
12. The intermodulation figures are defined:
; α
1.1 value at 1.1 MHz referenced to black/white signal;
; α3.3 value at 3.3 MHz referenced to colour carrier.
13. Response speed valid for a VIF input level range of 200
Vupto70mV.
14. 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.
15. Depending on the ratio
C/C0 of the LC resonant circuit of VCO (Q0 > 50; see note 4; C0 =Cint +Cext).
16. The Vo QSS output (pin 20) is analysed by a test demodulator TDA9820. The S/N of this equipment should be higher
than 60 dB, related to a deviation of
±27 kHz, in accordance with “CCIR 468-4”.
17. For all S/N measurements the used vision IF modulator has to meet the following specifications:
a) Incidental phase modulation for black-to-white jump less than 0.5 degrees.
b) QSS AF performance, measured with the television-demodulator AMF2 (audio output, weighted S/N ratio) better
than 60 dB (deviation 27 kHz) for 6 kHz sine wave black-to-white video modulation.
c) Picture-to-sound carrier ratio; PC/SC1 = 13 dB (transmitter).
18. Measurements taken with SAW filter G3962 (Siemens) for vision IF (suppressed sound carrier) and G9350
(Siemens) for sound IF (suppressed picture carrier). Input level Vi SIF = 10 mV RMS, 27 kHz (54% FM deviation).
19. 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.
20. Measurements taken with SAW filter L9453 (Siemens) for AM sound IF (suppressed picture carrier).
21. The input voltage has to be Vi > 2.8 V or open-circuit.
α
1.1
20
V
0 at 4.4 MHz
V
0 at 1.1 MHz
--------------------------------------
3.6dB
+
log
=
α
3.3
20
V
0 at 4.4 MHz
V
0 at 3.3 MHz
--------------------------------------
log
=
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