TDA3858 Datasheet, PDF (7/17 Pages) NXP Semiconductors – Quasi-split sound processor for all standards

Philips Semiconductors
Quasi-split sound processor for all standards
Product specification
TDA3858
CHARACTERISTICS
V_P = 5 V (pin 27) 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_P1
supply voltage (pin 27)
V_P2
supply voltage (pin 28)
I_P1
supply current (pin 27)
IF source control (pin 6)
pin 28 not
connected
pin 27 not
connected
V_P1 = 5 V
4.5
5
8.8
V
10.8
12
13.2
V
48
60
72
mA
V₆
input voltage in order to obtain
standards
B/G (FM) with automatic muting pin 6 connected
2.8
pin 6 open-circuit −
B/G (FM) without muting
pin 6 connected or 1.3
alternative
measure: 22 kΩ to
GND
L(AM sound)
pin 6 connected
0
I₆
V_{6(12 V)}
input current
maximum input voltage (pin 6)
V₆ = V_P1
−
V₆ = 0 V
−
supply at pin 28
−
IF input not activated (pins 1-2 or 31-32)
R_I
V_I
α_16-17
input resistance
−
DC input voltage (pins 1, 2 or 31, 32) LOW set internally −
crosstalk attenuation of IF input
note 1
50
switch
−
V_P1
V
2.8
−
V
−
2.3
V
−
0.8
V
−
100
µA
−
−300 µA
−
5.5
V
−
100
Ω
−
0.1
V
56
−
dB
IF amplifier (pins 1-2 or 31-32)
R_I
input resistance
1.8
C_I
input capacitance
−
V_I
DC potential, voltage (pins 1, 2, 31,
−
32)
V_{i IF (RMS)}
maximum input signal (RMS value) V_o = +1 dB
70
input signal sensitivity B/G standard −3 dB intercarrier −
(RMS value, pins 31-32)
signal reduction at
pin 23
input signal sensitivity L standard
(RMS value, pin 1-2)
−3 dB intercarrier −
signal reduction at
pin 11
2.2
−
kΩ
2.0
2.6
pF
1.75
−
V
100
−
mV
70
100
µV
70
100
µV
June 1994
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