KA2198BD RGB ENCODER FOR PAL/NTSC
RGB ENCODER FOR PAL/NTSC
The KA2198BD is a monolithic circuit designed for RGB
encoder of video system. This device provides encoding
system of PAL and NTSC video signal. The KA2198BD
contains matrix of R-Y/B-Y, modulator, pulse generator,
regulator, built in BPF of chroma and delay line of lumin-
ance, Y/C output using S-VHS system. It is suitable for
video equipment.
FUNCTIONS
Regulator
Mixer of R-Y, B-Y
Modulator
Pulse generator (ECL circuit)
Audio buffer
Clamp circuit
Y-TRAP filter
BPF & D.L circuit
Y/C output driver
FEATURES
Lower operating voltage : V
CC
= 5V
Stabilized bias condition in regulator
Abailable PAL/NTSC system
Included 75 ohm driver ( RGB output, composite video output, Y/C output)
External fsc ( color sub-carrier)
Include BPF & delay line
Audio buffer circuit
R-Y, B-Y modulator
Available S-VHS
High frequency response of luminance
BLOCK DIAGRAM
24-SOP-300
Device
Package
Operating Temperature
KA2198BD 24-SOP-300
-20
C~+65
C
ORDERING INFORMATION
Y OUT
D.L
BPF
PHASE
CONTROL
MATRIX
A
U
D
I O
B
U
F
F
E
R
1
2
3
4
5
6
7
8
9
10
11
12
SYNC. IN
SYNC. ADDER
R-Y MODULATOR
B-Y MODULATOR
C
A
M
P
R
, G
, B
O
U
T
P
U
T
24
22
22
21
20
19
18
17
16
15
14
13
VIDEO
OUTPUT
Y/C
MIXER
C OUT
Vref
R,G,B CLAMP
KA2198BD RGB ENCODER FOR PAL/NTSC
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS (T
A
=25
C)
ELECTRICAL CHARACTERISTICS (T
A
=25
C,V
CC
=5V)
Pin No.
DESCRIPTION
Pin No.
DESCRIPTION
1
GND1
13
N.C
2
R INPUT
14
2V REGULATOR
3
G INPUT
15
C.OUT
4
B INPUT
16
Y OUT
5
N.C
17
Y-TRAP FILTER
6
fsc INPUT
18
N.C
7
NTSC/PAL SW
19
VCC2
8
AUDIO IN
20
COMPOSITE VIDEO OUTPUT
9
AUDIO OUT
21
B OUTPUT
10
COMPOSITE SYNC. IN
22
G OUTPUT
11
N.C
23
R OUTPUT
12
VCC1
24
GND2
(note) V
CC
1, GND1 : except output stage
V
CC
2, GND2 : output stage supply voltage
Characteristics
Symbol
Value
Unit
MAX Supply Voltage
V
CCMAX
10
V
Power Dissipation
P
D
1250
mW
Operating Temperature
T
OPR
-20~+70
C
Storage Temperature
T
STG
-55~+150
C
Characteristics
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Current 1
I
CC
1
No signal input
25
39
49
mA
Supply Current 2
I
CC
2
5.0
11
16
mA
R Output Voltage
V
OR
R,G,B input signals
0.64
0.71
0.78
V
P-P
G Output Voltage
V
OG
Vin=1.0 V
P-P
, f=200KHz
0.64
0.71
0.78
V
P-P
B Output Voltage
V
OB
0.64
0.71
0.78
V
P-P
R Frequency Response
R
FC
R,G,B input signals
5.0
-
-
MHz
G Frequency Response
G
FC
Vin=1.0 V
P-P
, f=200KHz
5.0
-
-
MHz
B Frequency Response
B
FC
(-3dB point)
5.0
-
-
MHz
Y Frequency Response
Y
FCN
Y OUT (-3dB point)
6.0
-
-
MHz
R 100% Y Level
Ratio(CVBS)
V
YR
1
R,G,B input signals
0.19
0.21
0.25
-
G 100% Y Level
Ratio(CVBS)
V
YG
1
Vin=1.0 V
P-P
0.38
0.42
0.48
-
B 100% Y Level
Ratio(CVBS)
V
YB
1
(100% R,G,B / 100% Y)
0.07
0.08
0.09
-
KA2198BD RGB ENCODER FOR PAL/NTSC
Characteristics
Symbol
Test Conditions
Min
Typ
Max
Unit
100% Y Level ( CVBS )
V
YW1
0.64
0.71
0.82
V
P-P
Sync. Level 1 ( CVBS )
V
SNC1
0.26
0.29
0.33
V
P-P
R 100% Y Level Ratio (Y OUT)
V
YR2
R,G,B input signal
0.19
0.21
0.25
-
G 100% Y Level Ratio (Y OUT)
V
YG2
Vin=1.0V
P-P
0.38
0.42
0.48
-
B 100% Y Level Ratio (Y OUT)
V
YB2
(100% R,G,B / 100% Y)
0.07
0.08
0.09
-
100% Y Level (Y OUT)
V
YW2
0.64
0.71
0.82
V
P-P
Sync. Level 1 (Y OUT)
V
SNC2
0.26
0.29
0.33
V
P-P
Audio Buffer Gain
Ga
Audio Input
-1.0
1.0
1.1
dB
Audio Frequency Response
Fa
100KHz, 1V
P-P
30
-
-
KHz
Audio Distortion
THD
-
-
1.0
%
NTSC mode
R Chroma Ratio 1 (CVBS)
R/B1
2.70
3.15
3.50
-
G Chroma Ratio 1 (CVBS)
G/B1
fsc input 3.58MHz, 400mV
P-P
2.55
2.95
3.25
-
B Chroma Ratio 1 (CVBS)
B/B1
( check CVBS out )
1.90
2.24
2.47
-
Burst level 1 (CVBS)
Vob1
0.20
0.29
0.34
V
P-P
R Chroma Ratio 2 (C OUT)
R/B2
2.70
3.15
3.50
-
G Chroma Ratio 2 (C OUT)
G/B2
fsc input 3.58MHz, 400mV
P-P
2.55
2.95
3.25
-
B Chroma Ratio 2 (C OUT)
B/B2
( check C out )
1.90
2.24
2.47
-
Burst level 2 (C OUT)
Vob2
0.20
0.29
0.34
V
P-P
R Phase (CVBS)
SR
N
94
104
114
deg
G Phase (CVBS)
SG
N
fsc input 3.58MHz, 400mV
P-P
231
241
251
deg
B Phase (CVBS)
SB
N
( check CVBS out )
337
347
357
deg
Burst Width
T
WN
2.5
2.75
3.6
usec
Burst Position
T
PN
0.45
0.5
0.75
usec
Carrier Leakage
CL
CVBS out, Y out
-
-
0.03
V
P-P
PAL mode
R Chroma Ratio 3 (CVBS)
R/B3
2.70
3.15
3.50
-
G Chroma Ratio 3 (CVBS)
G/B3
fsc input 3.58MHz, 400mV
P-P
2.55
2.95
3.25
-
B Chroma Ratio 3 (CVBS)
B/B3
( check CVBS out )
1.90
2.24
2.47
-
Burst level 3 (CVBS)
Vob3
0.20
0.29
0.34
V
P-P
R Chroma Ratio 4 (C OUT)
R/B4
2.80
3.15
3.50
-
G Chroma Ratio 4 (C OUT)
G/B4
fsc input 3.58MHz, 400mV
P-P
2.65
2.95
3.25
-
B Chroma Ratio 4 (C OUT)
B/B4
( check C out )
2.01
2.24
2.47
-
Burst level 4 (CVBS)
Vob4
0.20
0.29
0.34
V
P-P
R Phase (CVBS)
SR
P
94
104
114
deg
G Phase (CVBS)
SG
P
fsc input 3.58MHz, 400mV
P-P
231
241
251
deg
B Phase (CVBS)
SB
P
( check CVBS out )
337
347
357
deg
Burst Width
T
WP
2.0
2.25
2.5
usec
Burst Position
T
PP
0.35
0.45
0.55
usec
PAL Burst Phase 1
P1
CVBS out, Y out
125
135
145
deg
PAL Burst Phase 2
P2
215
225
235
deg
Y Frequency Response
Y
FCP
Y output (-3dB point)
6.0
-
-
MHz
KA2198BD RGB ENCODER FOR PAL/NTSC
TEST WAVEFORM
SYNC. INPUT
( PIN 10)
R IN
(PIN 2)
G IN
(PIN 3)
B IN
(PIN 4)
CVBS OUT
(PIN 20)
C OUT
(PIN15)
Y OUT
(PIN16)
< INPUT SIGNAL >
< OUTPUT SIGNAL >
AUDIO IN
(PIN 8)
fsc IN
(PIN 6)
1kHz
3.58 MHz(NTSC), 4.43MHz(PAL)
AUDIO OUT
(PIN 9)
0 V
1kHz
1 Vp-p
1 Vp-p
1 Vp-p
1 Vp-p
0.3 ~ 5.7 Vp-p
4 V
1 Vp-p
KA2198BD RGB ENCODER FOR PAL/NTSC
APPLICATION CIRCUIT
SYSTEM
Fo(MHz)
H
L(uH)
H
C(pF)
NTST
3.57
100
20
PAL
4.43
82
15
23
22
21
20
19
18
16
15
14
13
1
2
3
4
5
6
8
9
10
11
12
0.1
F
R
IN
G
IN
B
IN
0.1
F 0.1
F
AUDIO
IN
C.SYNC
IN
AUDIO
OUT
GND (PAL)
+
+
24
75
470
F
470
F
470
F
75
75
75
R
OUT
G
OUT
B
OUT
CVBS
OUT
7
+
+
+
100
F
0.01
F
Vcc (5V)
10
F
+
n.c
470
F
KA2198BD
n.c
Vcc (NTSC)
fsc in
n.c
*L
+
Y OUT
*C
+
75
75
C OUT
n.c
470
F
470
F
17
3.58MHz(NTSC), 4.43 MHz(PAL)
0.3 ~5.7Vpp
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