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參數(shù)資料
| 型號(hào)： | TDA9800 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | VIF-PLL demodulator and FM-PLL detector |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP20 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-20 |
| 文件頁數(shù)： | 12/23頁 |
| 文件大小： | 177K |
| 代理商： | TDA9800 |
July 1994
12
Philips Semiconductors
Preliminary specification
VIF-PLL demodulator and FM-PLL detector
TDA9800
Notes
1.
2.
Values of video and sound parameters are decreased at V
P
= 4.5 V.
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).
Temperature coefficient of external LC-circuit is equal to zero.
V
i IF
= 10 mV (RMS value);
f = 1 MHz (VCO frequency offset related to picture carrier frequency); white picture
video modulation.
V
i IF
signal for nominal video signal.
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.
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.
The intercarrier output signal is superimposed to the video signal at pin 13 and can be calculated by the following
V
p-p
1V
p-p
(
)
V
iPC
3.
4.
5.
6.
7.
8.
formula:
= sound to picture carrier ratio at IF
input (pins 1 and 2 in dB and
±
2 dB = tolerance of intercarrier output amplitude V
o FM
.
Measurements taken with SAW filter G1962; modulation: VSB, f
video
>
0.5 MHz, loop bandwidth BL = 60 kHz.
10. 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).
11. The leakage current of the AGC capacitor has to be
<
1
μ
A to avoid larger tilt.
12. 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
.
13.
α
0.92/1.1
= 20 log (V
o
at 4.4 (3.58) MHz / V
o
at 0.92 (1.1) MHz)
+
3.6 dB;
α
0.92/1.1
value at 0.92 (1.1) MHz related to
black/white signal.
α
2.76/3.3
= 20 log (V
o
at 4.4 (3.58) MHz / V
o
at 2.76 (3.3) MHz);
α
2.76/3.3
value at 2.76 (3.3) MHz related to colour
carrier.
14. To match the AFC output signal to different tuning systems a current source output is provided (Fig.8).
15. Depending on the ratio
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).
16. No mute state is also valid for pin not connected.
17. 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 reference. A VIF/SIF input signal is not permitted. Pin 19 has to
be connected to positive supply voltage. S/N and THD measurements are taken at 50
μ
s (75
μ
s at standard M)
de-emphasis.
18. 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).
19. The leakage current of the 2.2
μ
F capacitor is
<
100 nA.
20. For all S/N measurements the used vision IF modulator has to meet the following specification:
- Incidental phase modulation for black-to-white jump less than 0.5 degree.
9.
20
)
---------------------------------------
log
iSC
V
6.9 dB
2 dB with
V
V
iPC
----------- dB
±
+
=
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PDF描述 |
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| TDA9800T | VIF-PLL demodulator and FM-PLL detector |
| TDA9801 | Single standard VIF-PLL demodulator and FM-PLL detector |
| TDA9801T | Single standard VIF-PLL demodulator and FM-PLL detector |
| TDA9802 | Multistandard VIF-PLL demodulator and FM-PLL detector |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9800T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:VIF-PLL demodulator and FM-PLL detector |
| TDA9801 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single standard VIF-PLL demodulator and FM-PLL detector |
| TDA9801/V1,112 | 功能描述:射頻無線雜項(xiàng) VIF-PLL DEM./FM-PLL RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel |
| TDA9801N | 功能描述:射頻無線雜項(xiàng) VIF-PLL DEM./FM-PLL DET. RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel |
| TDA9801T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single standard VIF-PLL demodulator and FM-PLL detector |
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