TDA9809 Philips Semiconductors, TDA9809 Datasheet - Page 18

• Manufacturer Part Number: TDA9809
• Description: Single standard multimedia IF-PLL and FM radio demodulator
• Manufacturer: Philips Semiconductors

Philips Semiconductors
14. The intercarrier output signal at pin 10 can be calculated with the following formula using the video output signal at
15. Input level for second IF from an external generator with 50
16. Measured with an FM deviation of 27 kHz, the typical AF output signal is 500 mV (RMS) (R
17. The leakage current of the decoupling capacitor (2.2 F) should not exceed 1 A.
18. For all S/N measurements, the vision IF modulator used must meet the following specifications:
19. The PC/SC
20. Measurements taken with SAW filter G1962 (sound shelf: 20 dB) for vision and sound IF.
21. The RIF amplifier output (pin 10) must be connected to a multistandard application ceramic filter for
22. d
23. The control steepness of the radio AFC detector is dependent on the characteristic of the ceramic resonator, pin 18.
1998 Jan 08
Single standard multimedia IF-PLL and FM
radio demodulator
pin 13 (V
with
6 dB = correction term of internal circuitry and 3 dB = tolerance of video output and intercarrier output amplitude
V
Example: SAW filter G1962 (sound shelf: 20 dB)
f
connected to the positive supply voltage for minimum IF gain. S/N and THD measurements are taken at 50 s (75 s
at M standard) de-emphasis (modulator pre-emphasis has to be activated). The FM demodulator steepness
a) Second IF input level 10 mV (RMS).
R
than 53 kHz the AF output signal has to be reduced by using R
FM deviation up to 100 kHz an attenuation of 6 dB is recommended with R
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
c) Picture-to-sound carrier ratio; PC/SC
ratio. This PC/SC
these values.
5.5, 6.0 and 10.7 MHz. This total load constitutes an impedance of 250 .
each signal. d
The figure given here will be obtained when applying a typical resonator of the type CDA 10.7 MC1-A (Murata).
The spread of the control steepness depends on the spread of the ceramic resonator characteristic (see Fig.11).
V
------------- - (dB)
V
mod
V
3
V
o(rms)
x
i(SC)
i(PC)
o rms
tested using two signals with frequencies of f
o(AF)
= 680
than 60 dB (deviation 27 kHz) for 6 kHz sine wave black-to-white video modulation.
= 1 kHz, 27 kHz (54% FM deviation) of audio reference. A VIF/SIF input signal is not permitted. Pin 5 has to be
---------- -
2 2
.
1
/ f
o(video)(p-p)
=
AF
= correction term for RMS value,
1
1.1 V p p
the AF output signal is attenuated by 6 dB (250 mV RMS). For handling a frequency deviation of more
= sound-to-picture carrier ratio at VIF input (pins 1 and 2) in dB,
is positive.
ratio at pins 1 and 2 is calculated as the addition of TV transmitter PC/SC
3
is the ratio of the intermodulation product at 10.3 MHz to the output level of V
1
ratio is necessary to achieve the S/N
= 1.1 V typical) as a reference:
–
---------- -
2 2
1
10
V
---------------- - dB
V
------------------------------------------------------------------- -
i SC
i PC
1
= 13 dB; (transmitter).
20
+
1
6 dB 3 dB
= 10.5 MHz and f
V
------------- -
V
18
i(SC)
i(PC)
W
values as noted. A different PC/SC
=
source impedance. AC-coupled with 10 nF capacitor,
–
27 dB
x
in order to avoid clipping (THD < 1.5%). For an
2
= 10.7 MHz, and with a level of V
V
o(rms)
x
= 680 .
=
32 mV (typ.)
1
ratio and SAW filter PC/SC
Preliminary specification
x
= 0 ). By using
i(4)(max)(rms)
1
.
ratio will change
TDA9809M
i(4)(max)(rms)
.
for
1