TDA8446 Datasheet, PDF (7/16 Pages) NXP Semiconductors – Fast RGB/YC switch for digital decoding

Philips Semiconductors
Fast RGB/YC switch for digital decoding
Product specification
TDA8446
CHARACTERISTICS
V_CC = 12 V; T_amb = 25 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
Supply
I_CC
SVRR
supply current
supply voltage rejection ratio
note 1
Y and R, G, B channels
I_CL
input clamping current
V_CC = 6 V; V_I = 0 V
I_I
input current
V_I = 9 V
G_A
gain of amplifier A
f_i = 1 MHz; V_SW2 = 2 V
f_i = 1 MHz; V_SW2 = 0.8 V
G_B
gain of amplifier B
f_i = 1 MHz
RGB matrixed according to the
following equations:
Y = 0.30R + 0.59G + 0.11B
R−Y = 0.70R − 0.59G − 0.11B
∆G_diff
|∆G|
R_O
∆t
V_O
t_fsd
t_fs
I_IFS
B−Y = −0.30R − 0.59G + 0.89B
relative gain difference
note 2
maximum gain variation
output resistance
100 kHz < f_i < 8 MHz
time difference at output
DC output level
fast switching delay
f_i = 1 MHz; note 3
V_CCL = 6 V
see Fig.4
fast switching time
see Fig.4
input current on fast switching
control (pin 13)
V_I = 0.4 V
V_I = 1 V
Chrominance channel (CIN, COUT)
R_i
internal input resistance
V_O
DC output level
G_A
gain of amplifier A
|∆G|
maximum gain variation
α_off
isolation (off state)
Z_o
output impedance
R_o
output resistance
I_I = 0
f_i = 1 MHz; V_SW1 = V_SW2 = 2 V
f_i = 1 MHz; V_SW2 = 0.8 V
100 kHz < f_i < 8 MHz
f_i = 5 MHz; V_SW1 = V_SW2 = 0.8 V
V_SW1 = V_SW2 = 0.8 V
TTL inputs (SW1, SW2, CLI)
I_IH
HIGH level input current
V_IH = 2 V
I_IL
LOW level input current
V_IL = 0.8 V
MIN. TYP. MAX. UNIT
−
−
75
mA
30 −
−
dB
0.3 −
−
mA
−1.5 +0.5 +1.5 µA
−1 0
+1
dB
5
6
7
dB
−1 0
+1
dB
−
0
10
%
−
3
−
dB
−
15 −
Ω
−
−
25
ns
−
4.2 −
V
−
20 −
ns
−
10 −
ns
−
0.7 −
µA
−
0.5 −
µA
−
50 −
kΩ
−
5
−
V
−1 0
+1
dB
5
6
7
dB
−
3
−
dB
−
60 −
dB
100 −
−
kΩ
−
7
−
Ω
−
−
10
µA
−
−
−600 µA
1995 Feb 16
7