PANASONIC AN2458SH

AN2458SH
Color Encoder IC (NTSC/PAL) for CCD Video Camera
■ Overview
Unit:mm
The AN2458SH is a color encoder IC for NTSC/
PAL-compatible CCD video camera. It outputs chroma signal after modulation of inputted R–Y and B–Y
color difference signals with subcarrier signals.
24
12
13
0.1
0.15 +– 0.05
1.5±0.2
0.1±0.1
• Compatible with NTSC and PAL
• Carrier leak adjustment available
• Built-in blanking circuit
• Color phase adjustment available
• Improved temperature characteristics of color phase
shift (within ±5˚C)
(0.5)
5.5±0.3
0.65±0.1
■ Features
0.65±0.1
0.2±0.1
6.5±0.3
0.5
1
7.5±0.3
24-Pin SSOP Package (SSOP024-P-0300)
■ Block Diagrams
VREF
R–Y IN
24
23
R–Y
OFF
22
21
HUE
R–Y SC Cont. BF IN
20
19
18
DC.
Cont. C
17
BLK. IN
16
15
BLK
DC Cont.
Clamp
MOD
CP2. IN
14
13
VCC
CP2
NC
NC
VREF
VCC
CP2
+
Lim.
BLK
BLK
Clamp
MOD
MOD
GC
CP2
GC
+
HUE
+
NC
1
2
B–Y IN GND
3
4
5
6
B–Y
OFF
B–Y
SC
90.
ADJ
7
8
9
HUE.C HUE. BURST
CR LEVEL
10
NC
11
12
CHROMA HUE.R
OUT
■ Absolute Maximum Ratings
Symbol
Rating
Supply voltage
Parameter
VCC
5.5
V
Supply current
ICC
25
mA
PD
120
mW
Topr
–20 to +75
˚C
Tstg
–55 to +125
˚C
Power dissipation
Operating ambient temperature
Note 1)
Storage temperature Note 1)
Unit
Note 1) Ta=25˚C except operating ambient temperature and storage temperature.
■ Recommended Operating Range (Ta=25˚C)
Parameter
Symbol
Range
VCC
4.6V to 5.0V
Operating supply voltage range
■ Electrical Characteristics (Ta=25±2˚C)
min
typ
Supply current
Parameter
Symbol
ICC
VCC=4.8V, VREF=1.8V
12.0
16.0
20.0
mA
CP2 threshold 1
VTH (CP2–1)
VCC=4.8V, VREF=1.8V
1.5
1.8
2.1
V
CP2 threshold 2
VTH (CP2–2)
VCC=4.8V, VREF=1.8V
2.0
2.4
2.8
V
BLK threshold
VTH (BLK)
VCC=4.8V, VREF=1.8V
1.9
2.2
2.5
V
Terminal voltage Pin5
V5
–100
0
100
mV
Terminal voltage Pin11
V11
VCC=4.8V, VREF=1.8V
diffrence from VREF
VCC=4.8V, VREF=1.8V
1.8
2.3
2.8
V
VCC=4.8V, VREF=1.8V
diffrence from VREF
VCC=4.8V, VREF=1.8V
250mVP–P input
VCC=4.8V, VREF=1.8V
250mVP–P input
VCC=4.8V, VREF=1.8V
600mVP–P input
VCC=4.8V, VREF=1.8V
250mVP–P input
BLK=3VOP
VCC=4.8V, VREF=1.8V
V9=VREF
VCC=4.8V, VREF=1.8V
V9=VREF±0.5V
VCC=4.8V, VREF=1.8V
V9=VREF–0.5V
VCC=4.8V, VREF=1.8V
V19=VREF+0.5V
VCC=4.8V, VREF=1.8V
V19=VREF–0.5V
–100
0
100
mV
480
600
720
mVP–P
–7.0
–5.5
–3.5
dB
0.5
3.0
4.5
dB
300
600
900
mVP–P
290
350
430
mVP–P
1.5
3.0
4.5
dB
–6.0
–4.5
–2.5
dB
–45
–30
–15
deg
0
15
30
deg
Terminal voltage Pin20
V20
R–Y GAIN
GV1
B–Y GAIN
GV2
CHROMA CLIP
GV3
BLK CONTROL
GV4
BURST GC (1)
GV5
BURST GC (2)
GV6
BURST GC (3)
GV7
BURST PHASE (1)
θ1
BURST PHASE (2)
θ2
Condition
max
Unit
■ Application Circuit
BLK (BLan King) IN
BF (Burst Flag) IN
CP2 (Clamp Pulse) IN
VREF
(typ.1.8V)
HUE
27kΩ
50kB
+
47µF
16.3V
10kB
0.047
µF
6400Ω
1kΩ
22µH
10kΩ
VCC
+
100µF 16.3V (typ.4.8V)
24 23 22 21 20 19 18 17 16 15 14 13
R–Ysig.IN
AN2458SH
0.22µF
1
2
3
4
5
6
7
8
9
10 11 12
B–Ysig.IN
0.22µF
*10pF
22
kΩ
10kΩ 10kB
6800Ω
SC90˚IN
1500Ω
6800Ω
22
kΩ
6400Ω
0.001
µF
27kΩ
SC0˚IN
1kΩ
1
kΩ
0.001
µF
1500Ω
50kB
90.Adj.
50kB
Burst
Level
Chroma
Level
1kΩ
BPF
CHROMA
OUT
* The phase-shift capacitor is typically
10 pF for both NTSC and PAL.
■ Pin Descriptions
Pin No.
Pin name
Pin No.
Pin name
1
2
Color difference (B–Y) input
GND
13 Clamp pulse input
14 VCC (4.8V typ.)
3
N. C.
15 N. C.
4
Subcarrier (0˚) OFF
16 Blanking pulse input
5
Subcarrier(0˚) input
17 DC playback capacitor
6
90˚adjustment
18 Burst flag input
7
Phase-shift capacitor
19 Phase adjustment
8
Phase-shift capacitor
20 Subcarrier (90˚/270˚) input
9
Burst amplitude adjustment
21 Subcarrier (90˚/270˚) OFF
10 N. C.
1kΩ
22 N. C.
11 Chroma plus burst output
23 Color difference (R–Y) input
12 Phase-shift resistors
24 VREF (1.8V typ.)