TDA9802 Philips Semiconductors, TDA9802 Datasheet - Page 12

• Manufacturer Part Number: TDA9802
• Description: Multistandard VIF-PLL demodulator and FM-PLL detector
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Notes to the characteristics
1. Typical values of video and sound parameters are decreased at V
2. The input voltage for negative modulation has to be V
3. Loop bandwidth BL = 60 kHz (natural frequency f
4. The oscillator drift is related to the picture carrier frequency (at external temperature-compensated LC-circuit).
5. V
6. V
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,
8. Offset current measured between pin 6 and half of supply voltage (V = 2.5 V) under the following conditions: no input
9. The intercarrier output signal is superimposed to the video signal at pin 13 and can be calculated by the following
10. Measurements taken with SAW filter G1956; modulation: VSB, f
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
12. The leakage current of the AGC capacitor has to be 1 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
14.
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
17. No mute state is also valid for pin not connected. For switching on the L-standard no external load is allowed at pin
18. A 5.5 MHz signal for second IF with 10 mV (RMS value) input level, f
19. To allow higher frequency deviation, the resistor R
20. The leakage current of the 2.2 F capacitor is 100 nA.
November 1992
Multistandard VIF-PLL demodulator and
FM-PLL detector
FPLL input signal level).
Resonance circuit of VCO: Q
video modulation.
RMS value) in relation to a superimposed, 5 MHz band-limited white noise signal (RMS value); video modulation:
white picture.
signal at IF input (pins 1 and 2) and IF-amplifier gain at minimum (V
formula:
with
and
trap is applied a 330
in accordance with CCIR-567 at a source impedance of 50 .
(Q
5 except capacitor C
FM modulation of audio reference is fed directly to pin 11. Audio measurements are taken at 50 s de-emphasis.
not exceed the AF output signal of nominally 0.35 V for THD = 0.1% (R
20
V
----------- - dB
V
2 dB = tolerance of intercarrier output amplitude V
1.1
3.3
i IF
i IF
iSC
iPC
o
log
= 10 mV (RMS value); f = 1 MHz (VCO frequency offset related to picture carrier frequency); white picture
for 0.9 V CVBS (peak-to-peak value) at composite video output pin 13; PLL is still locked.
= 20 log (V
= 20 log (V
50; C
V
----------------------------------------- -
13 interc.
=
1V p p
o
sound to picture carrier ratio at IF input (pins 1 and 2) in dB
= C
o
o
int
–
at 4.4 MHz / V
at 4.4 MHz / V
p p
+C
–
BL
ext
.
resistor must be connected from output to input (from pin 13 to pin 14).
; C
=
ext
V
----------- - dB
V
o
= 8.2 pF; C
o
iSC
iPC
of the LC resonance circuit of VCO
o
o
50; C
at 1.1 MHz) + 3.6 dB;
at 3.3 MHz);
+
ext
6.9 dB
int
= 8.2 pF; C
8.5 pF).
3.3
2 dB
n
x
value at 3.3 MHz related to colour carrier.
= 15 kHz; damping factor d = 2 calculated with grey level and
on pin 10 (see Fig.12) has to be increased to a value which does
o FM.
int
8
12
8.5 pF (loop voltage about 2.7 V).
1.1
1.5 V, or pin 8 open-circuit.
value at 1.1 MHz related to black/white signal
video
P
19
= 4.5 V.
mod
= V
0.5 MHz, loop bandwidth BL = 60 kHz.
x
= 1 kHz and frequency deviation with 54%
= 4.7 k provides 6 dB amplification).
P
), pin 4 (phase adjust) open-circuit.
Preliminary specification
TDA9802