TDA3857 Datasheet, PDF (6/14 Pages) NXP Semiconductors – Quasi-split sound processor with two FM demodulators

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
V_P
V_I
P_tot
T_stg
T_amb
V_ESD
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
V_P
635
+150
+70
UNIT
V
V
mW
°C
°C
±500
−
V
+400
−
V
−500
−
V
CHARACTERISTICS
V_P = 5 V and T_amb = +25 °C; measurements taken in Fig.3 with f_VC = 38.9 MHz, f_SC1 = 33.4 MHz and
f_SC2 = 33.158 MHz. Vision carrier (VC) modulated with different video signals, modulation depth 100% (proportional to
10% residual carrier).
Vision carrier amplitude (RMS value) V_{i 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
V_P
supply voltage (pin 19)
I_P
supply current (pin 19)
IF amplifier (pins 1 and 20)
R_I
C_I
V_I
V_{i IF (RMS)}
input resistance
input capacitance
DC input voltage
maximum input signal (RMS value,
pins 1-20)
input signal sensitivity (RMS value)
∆G_v
IF gain control
V₂
voltage for gain control (pin 2)
B
IF bandwidth
4.5
48
1.8
−
−
V_o = +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)
V_{o (p-p)}
vision carrier amplitude
(peak-to-peak value)
R_10-11
L
operating resistance
inductance
C
capacitance
f_o = 38.9 MHz
Figs 3 and 4
−
270 −
mV
−
4
−
kΩ
−
0.247 −
µH
−
68
−
pF
June 1994
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