TDA3857 Ver la hoja de datos (PDF) - Philips Electronics
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TDA3857 Datasheet PDF : 14 Pages
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Philips Semiconductors
Quasi-split sound processor with two FM demodulators
Product specification
TDA3857
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
VP
VI
Ptot
Tstg
Tamb
VESD
supply voltage (pin 19)
voltage (pins 1, 6, 7, 13, 15, 17 and 20)
total power dissipation
storage temperature
operating ambient temperature
electrostatic handling (note 1)
all pins except pins 1 and 20
pins 1 and 20
Note to the Limiting Values
1. Equivalent to discharging a 200 pF capacitor through a 0 Ω series resistor.
MIN.
−
0
0
−25
0
MAX.
8.8
VP
635
+150
+70
UNIT
V
V
mW
°C
°C
±500
−
V
+400
−
V
−500
−
V
CHARACTERISTICS
VP = 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, unless otherwise
specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
VP
supply voltage (pin 19)
IP
supply current (pin 19)
IF amplifier (pins 1 and 20)
RI
CI
VI
Vi IF (RMS)
input resistance
input capacitance
DC input voltage
maximum input signal (RMS value,
pins 1-20)
input signal sensitivity (RMS value)
∆Gv
IF gain control
V2
voltage for gain control (pin 2)
B
IF bandwidth
4.5
48
1.8
−
−
Vo = +1 dB
70
−3 dB intercarrier signal −
reduction at pin 15
60
1.7
−3 dB
50
5
8.8 V
60
72
mA
2.2 −
kΩ
2.0 2.6 pF
1.75 −
V
100 −
mV
70
100 µV
63
−
dB
−
2.6 V
70
−
MHz
Resonance amplifier (pins 10-11)
Vo (p-p)
vision carrier amplitude
(peak-to-peak value)
R10-11
L
operating resistance
inductance
C
capacitance
fo = 38.9 MHz
Figs 3 and 4
−
270 −
mV
−
4
−
kΩ
−
0.247 −
µH
−
68
−
pF
June 1994
6
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