TDA4650 Datasheet, PDF (7/13 Pages) NXP Semiconductors – Multistandard colour decoder, with negative colour difference output signals

Philips Semiconductors
Multistandard colour decoder, with
negative colour difference output signals
Preliminary specification
TDA4650
CHARACTERISTICS
All voltages are measured to GND (pin 11); V_P = 12 V; chrominance input signal V_15(p-p) = 100 mV (with 75 % colour bar
signal); 4 µs burst-blanking pulse and vertical blanking superimposed on super sandcastle pulse; T_amb = 25 °C;
measured in test circuit of Fig.1; unless otherwise specified.
SYMBOL
PARAMETER
V_P
supply voltage range
I_P
supply current
Chrominance part
V_i(p-p)
input signal (pin 15)
(peak-to-peak value)
R_i
input resistance (pin 15)
C_i
input capacitance (pin 15)
Demodulator part (PAL/NTSC)
V_1(p-p)
colour difference −(R−Y) output
signal (peak-to-peak value)
V_3(p-p)
colour difference −(B−Y) output
signal (peak-to-peak value)
V₁/V₃
ratio of colour difference signals
(R−Y)/(B−Y) for NTSC
V₁/V₁
m
ratio of PAL/NTSC signals
(R−Y)_PAL/(R−Y)_NTSC
signal linearity
V_1,3
V_1,3(p-p)
DC output level
H/2 ripple at CD outputs
residual carrier at CD outputs
(peak-to-peak value)
Z_1,3
output impedance
Demodulator part (SECAM); note 1
V_1(p-p)
V_3(p-p)
V_1,3
colour difference −(R−Y) output
signal (peak-to-peak value)
colour difference −(B−Y) output
signal (peak-to-peak value)
DC output level
H/2 ripple at CD outputs
V_{1,3(p−p)}
residual carrier at CD outputs
(peak-to-peak value)
CONDITIONS
MIN.
10.8
50
20
7
−
at nominal phase of hue
control
at nominal phase of hue
control
at nominal phase of hue
control
at nominal phase of
hue control
V_1(p-p) = 0.8 V − (R−Y)
V_3(p-p) = 1.0 V − (B−Y)
proportional to V_P
without colour bars
4.43 MHz
8.87 MHz
0.42
0.53
0.75
−
0.8
0.8
6.3
−
−
−
−
every second line blanked 0.83
every second line blanked 1.06
proportional to V_P
6.3
without colour bars every −
second line blanked
4.43 MHz
−
8.87 MHz
−
TYP.
12.0
60
100
10
4
0.525
0.665
0.79
−
−
−
6.8
−
−
−
−
1.05
1.33
6.8
−
−
−
MAX.
13.2
80
UNIT
V
mA
400
mV
13
kΩ
5
pF
0.66
V
0.84
V
0.83
1
dB
−
−
7.3
V
10
mV
10
mV
30
mV
200
Ω
1.32
V
1.67
V
7.3
V
10
mV
30
mV
30
mV
March 1991
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