TDA3867 Ver la hoja de datos (PDF) - Philips Electronics
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TDA3867 Datasheet PDF : 14 Pages
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Philips Semiconductors
Quasi-split sound processor with two FM demodulators
Preliminary specification
TDA3867T
CHARACTERISTICS
VP1 = 5 V and Tamb = 25 °C, measurements taken in Fig.3 with fVC = 38.9 MHz, fSC1 = 33.4 MHz and
fSC2 = 33.158 MHz.
Vision carrier (VC) modulated with different video signals, modulation depth 100 % (proportional to 10 % residual
carrier).
Vision carrier amplitude (RMS value) Vi VC = 10 mV; vision to sound carrier ratios are VC/SC1 = 13 dB and
VC/SC2 = 20 dB. Sound carriers (SC1, SC2) modulated with f = 1 kHz and deviation ∆f = ±50 kHz and deviation
∆f = ±50 kHz unless otherwise specified.
SYMBOL
PARAMETER
VP
supply voltage.range (pin 24)
IP
supply current (pin 24)
IF amplifier (pins 27-28)
RI
input resistance
CI
input capacitance
VI
DC potential, voltage (pins 27 and 28)
Vi IF
maximum input signal (RMS value)
input signal sensitivity (RMS value)
∆Gv
IF gain control range
B
IF bandwidth
V3
voltage range for gain control (pin 3)
Resonance amplifier (pins 14-15)
Vo
vision carrier amplitude
(peak-to-peak value)
R14-15
L
operating resistance
inductance
C
capacitance
QL
V14, 15
Q-factor of resonant circuit
DC voltage (pins 14 and 15)
Intercarrier mixer output (pin 20)
CONDITIONS
VP = 5 V
MIN.
4.5
48
TYP.
5
60
MAX. UNIT
8.8 V
72
mA
Vo = +1 dB
−3 dB intercarrier signal
reduction on pin 20
−3 dB
Gmin − Gmax
1.75
1.0
−
70
−
60
50
1.7
2.2 2.65 kΩ
1.5 2.2 pF
1.75 −
V
100 −
mV
70
100 µV
63
−
dB
70
−
MHz
−
2.6 V
fo = 38.9 MHz
Fig.3 and 4
CS = 27 pF
Qo = 90
−
270 −
mV
−
4
−
kΩ
−
0.247 −
µH
−
68
−
pF
−
40
−
−
VP−1 −
V
Vo
output signal for 5.5 MHz (RMS value)
71
output signal for 5.74 MHz (RMS value)
32
B
IF bandwidth
−1 dB
−
−3 dB
−
VVID/V20 residual video AM on intercarrier
note 1
−
VVC
residual vision carrier (RMS value)
1st/2nd harmonic;
−
(38.9/77.8 MHz)
R20
output resistance (emitter follower)
1 mA emitter current
−
Io
allowable AC output current (pin 20)
−
I20
allowable DC output current
−
V20
DC voltage
−
95
125 mV
43
56
mV
8.5 −
MHz
10
−
MHz
3
10
%
0.5 1
mV
30
−
Ω
−
±0.7 mA
−
−2
mA
1.75 −
V
January 1992
7
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