54GS-61S
ICs ADITIONAL INFORMATION: TDA9885 (IC201)
SYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.UNIT
BAF(-3dB)-3 dB audio frequency bandwidth forwithout de-emphasis;80100-kHz
FMdependent on loop Ţlter at
pin 4
S/NW(audio)weighted signal-to-noise ratio of27 kHz FM deviation;5256-dB
audio signal50 ?s de-emphasis;
vision carrier unmodulated
AM; m = 54%4550-dB
?AM(sup)AM suppression of FM demodulator50 ?s de-emphasis;4046-dB
AM: f = 1 kHz; m = 0.54
referenced to 27 kHz
FM deviation
PSRR8(AM)power supply ripple rejection at pin 8 fripple = 70 Hz; see Fig.82026-dB
PSRR8(FM)power supply ripple rejection at pin 8 fripple = 70 Hz; see Fig.81420-dB
Vo(rms)IF intercarrier level (RMS value),QSS mode; SC1; sound90140180mV
valid also for radiocarrier 2 off
L standard; without90140180mV
modulation
intercarrier mode; SC1;-note 5 -mV
sound carrier 2 off
freffrequency of reference signal atnote 6-4-MHz
pin 15
Vref(rms)amplitude of reference signal sourceoperation as input terminal80-400mV
(RMS value)
Notes
1. Values of video and sound parameters can be decreased at VP = 4.75 V.
2. Condition: luminance range (4 steps) 0 to 80%.
3. The sound carrier frequencies (depending on TV standard) are attenuated by the integrated sound carrier traps
(see Figs 16 to 21; ôH (s)ô is the absolute value of transfer function).
4. S/N is the ratio of black-to-white amplitude to the black level noise voltage (RMS value, pin 17). B = 5 MHz weighted
in accordance withOCCIR567�.
5. The intercarrier output signal at pin 12 can be calculated by the following formula taking into account the internal
video signal with 1.1 V (p-p) as a reference:
ViS()C
---------------()dB + 6 dB ?3 dB
ViP()C
----------------------------------------------------------------
120
Vo(intc)(rms) = 1.1 V (p-p)� ----------- � 10
22
where:
1ViS()C
----------- = correction term for RMS value, ---------------()dB = sound-to-picture carrier ratio at VIF input (pins 1 and 2) in dB,
22ViP()C
6 dB = correction term of internal circuitry and ?3 dB = tolerance of video output and intercarrier output amplitude
Vo(intc)(rms).
6. The reference input pin 15 is able to operate as a 1-pin crystal oscillator as well as input terminal with external
reference signal, e.g. from the tuning system.
21 |
ACEC
SHARP
