TDA3858 查看數據表（PDF） - Philips Electronics
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TDA3858 Datasheet PDF : 17 Pages
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Philips Semiconductors
Quasi-split sound processor for all standards
Product specification
TDA3858
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP. MAX. UNIT
AF performance for FM operation (standard B/G)
input signals: B/G IF input signal (pin 31, 32)
unmodulated sound carriers
different video modulation (100%)
the output signals are related to the signals described in the demodulator parts.
(S+N)/N(W) weighted signal-to-noise ratio
CCIR468-3;
de-emphasis 50 µs
black picture
2T/20T pulses with white bar
6 kHz sine wave, B/W-modulated
250 kHz square wave,
B/W-modulated
fi = 5.5 MHz
fi = 5.5 MHz
fi = 5.5 MHz
fi = 5.5 MHz
59
63
−
dB
57
61
−
dB
52
56
−
dB
50
54
−
dB
black picture
fi = 5.742 MHz
57
61
−
dB
2T/20T pulses with white bar
fi = 5.742 MHz
55
59
−
dB
6 kHz sine wave, B/W-modulated
fi = 5.742 MHz
50
54
−
dB
250 kHz square wave,
B/W-modulated
fi = 5.742 MHz
48
52
−
dB
Ripple rejection of the AF outputs (B/G and L standard)
RR
ripple rejection
Vripple on VP / Vripple on Vout
VR(p-p) = 200 mV; 30
40
−
dB
fR = 70 Hz
Notes to the characteristics
1. Crosstalk attenuation of IF input switch, measured at R16-17 = 470 Ω (instead of LC circuit);
input signal Vi (RMS) = 20 mV (pins 31-32). AGC voltage V4 set to a value to achieve Vo(RMS) = 20 mV (pins 16-17).
After switching (V6 = 0 V) measure attenuation.
IF coupling with OFWG3203 and OFWL9350 (Siemens).
2. Spurious intercarrier AM: m = (A − B)/A
(A = signal at sync; B = signal with 100% picture modulation).
3. Automatic Frequency Control (AFC) of the vision carrier reference circuit (pins 16 and 17) for reducing spurious video
signals in the stereo/dual sound modes. The factor of reducing FTR at a deviation ∆fVC specifies the ratio of spurious
signals with/without tracking function.
4. AF signal can be adjusted by V7.
5. For larger current: RL > 2.2 kΩ (pin 10 or 11 to GND) in order to increase the bias current of the output emitter
follower.
6. If not used, pin 7 should not be connected.
June 1994
11
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