LA7688 [SANYO]
Single-Chip CTV Signal-Processing Circuit for PAL and NTSC Formats; 单芯片中视信号处理电路用于PAL和NTSC格式
| 型号： | LA7688 |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | Single-Chip CTV Signal-Processing Circuit for PAL and NTSC Formats |
| 文件： | 总6页 (文件大小：109K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : EN5635
Monolithic Linear IC
LA7688
Single-Chip CTV Signal-Processing Circuit
for PAL and NTSC Formats
[OSD]
[DEF]
• Analog OSD
Overview
• Automatic 50/60 Hz discrimination
• Fixed vertical size • Double AFC
• Built-in sync separator circuit
The LA7688 integrates VIF, SIF, video, chrominance, and
deflection processing circuits for PAL/NTSC format TV
sets on a single chip and is provided in a 52-pin shrink
package.
[Other features] • Sandcastle pulse (for the 1H delay line)
• fsc output (for SECAM systems)
The VIF and SIF circuits achieve semi-adjustment-free
operation, and are adjustment-free except for the VCO coil
and the RF AGC circuit. The chrominance circuit can be
made adjustment-free by using the LC89950 1H delay line
IC. All the signal processing required for a multi-format
color TV can be implemented by combining this product
with the LA7642 SECAM decoder IC.
• Primary color output
Package Dimensions
unit: mm
3218-DIP52S
[LA7688]
Features
[VIF]
[SIF]
[VIDEO]
• PLL detector • Buzz canceller
• PLL detector • Audio switch
• Built-in trap • Built-in DL
• Aperture control
• Video switch (SVO output)
• Black expansion
[CHROMA]
• PAL/NT • Base band processing
(adjustment free)
SANYO: DIP52S
• Built-in bandpass filter
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
V
40 max
45 max
9
9
Maximum supply voltage
Maximum supply current
V
V
I24 max
I26 max
I32 max
16
5
mA
mA
mA
V
FBP input current
10
–5
FBP input voltage
I26 min
Allowable power dissipation
Operating temperature
Storage temperature
Pd max
Topr
Ta ≤ 65°C When mounted on a printed circuit board*
1.3
–10 to +65
–55 to +150
W
°C
°C
Tstg
Note : * Printed circuit board size: 83 × 86 × 1.5 mm, material: Bakelite
Operating Conditions at Ta = 25°C
Parameter
Symbol
V40
Conditions
Ratings
7.6
Unit
V
Recommended supply voltage
Recommended supply current
V45
7.6
V
I24
12
mA
V
V
40 op
45 op
7 to 8.2
7 to 8.2
10 to 16
Operating voltage range
Operating current range
V
V
I
24 op
mA
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
82097HA(OT) No. 5635-1/6
LA7688
Operating Characteristics at Ta = 25°C, V
= 7.8 V, I = 12 mA
CC40, 45
24
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
max
[Circuit Voltages and Currents]
Horizontal power-supply voltage
V
CCH
Deflection system (V24
)
6.4
6.9
90
40
7.4
V
I40
78
34
100
48
mA
mA
Current drain
I45
[VIF Block]
RF AGC maximum voltage
RF AGC minimum voltage
Input sensitivity
V50H
V50L
Vi
7.5
7.8
0.2
39
7.8
0.6
45
V
V
dBµ
dB
dBµ
V
AGC range
GR
VIN max
V8
56
95
60
Maximum allowable input
Quiescent video output voltage
Synchronizing signal tip voltage
Video output amplitude
Black noise threshold voltage
Black noise clamp voltage
Output signal-to-noise ratio
1.07 MHz beat level
100
4.4
2.0
2.0
1.3
3.0
52
4.1
1.7
1.7
1.0
2.7
48
4.7
2.3
2.3
1.7
3.3
V8tip
VO
V
Vp-p
V
VBTH
VBCL
S/N
C/S
fC
V
dB
dB
MHz
%
40
44
Frequency characteristics
Differential gain
6
9
DG
DP
5
10
10
Differential phase
6
deg
V
Quiescent AFT voltage
Maximum AFT voltage
Minimum AFT voltage
AFT detection sensitivity
VIF input resistance
V7
3.6
7.3
0
3.9
7.6
0.3
15
4.2
7.8
0.7
V7H
V7L
Sf
V
V
10
1.0
2
20 mV/kHz
Ri
f = 38.9 MHz
f = 38.9 MHz
1.3
3
1.6
5
kΩ
pF
VIF input capacitance
APC pull-in range (U)
APC pull-in range (L)
Ci
fPU
0.8
2.0
–2
MHz
MHz
MHz
MHz
mVrms
kHz
fPL
–0.8
∆
fU1
0.8
2.0
–2.0
140
4.8
VCO1 maximum variation range
∆
fL1
–0.8
170
9.6
SIF signal level
SOUT
ß
110
2.4
VCO1 control sensitivity
[SIF Block]
SIF limiting sensitivity
FM detector output voltage
AMR
Vi (lim)
40
390
40
46
500
60
52
dBµ
mVrms
dB
V
O (FM)
AMR
710
Total harmonic distortion
SIF S/N
THD
0.3
62
1.0
4.0
3.0
%
S/N (SIF)
WFML
WFMH
∆VO
55
dB
FM detector range (L)
FM detector range (H)
FM detector output variability
[INT/EXT Switching Block]
AFT EXT gain
2.5
8.0
2.0
MHz
MHz
dB
7.0
0
GAF
THD AF
V1TH1
V1TH2
V1TH3
V1TH4
–0.7
–0.2
0.03
+0.3
0.5
1.2
2.6
3.8
5
dB
%
V
AFT EXT distortion
System switch I-SE
Notes:
0
1.7
2.9
4.1
System switch I-P/N
System switch E-P/N
System switch E-SE
[Video Switching Block]
Video signal input 1 DC voltage
Video signal input 1 AC voltage
Video signal input 2 DC voltage
Video signal input 2 AC voltage
SVO pin DC voltage
SVO pin AC voltage
I = INT, E = EXT
P/N = PAL/NTSC
SE = SECAM
V
V
V
V10DC
V10AC
V14DC
V14AC
V16DC
V16AC
3.2
3.2
3.5
1.0
3.5
1.0
2.8
2.0
3.8
3.8
V
Vp-p
V
Vp-p
V
2.5
1.7
3.1
2.3
Vp-p
Continued on next page.
No. 5635-2/6
LA7688
Continued from preceding page.
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
max
[Filter Block]
Filter automatic adjustment open voltage
S input threshold
V9OPN
V9TH
GTRAP
GBPF1
GBPF2
GBPF3
Tdy1
fSC = 4.43 MHz
3.3
3.8
2.0
–26
–3
4.3
V
1.5
–20
–5
2.5
–32
–1
V
C-TRAP
dB
dB
dB
dB
ns
ns
ns
ns
C-BPF1
C-BPF2
–2
–1
0
C-BPF3
–6
–4
–2
Y-DL TIME1
PAL
400
410
230
510
450
460
280
560
500
510
330
610
Y-DL TIME2
Tdy2
NTSC
S (PAL)
SECAM
Y-DL TIME3
Tdy3
Y-DL TIME4
Tdy4
[Video Block]
Contrast center
ECCEN
dGC
1.0
18
1.2
22
1.4
26
Vp-p
dB
Contrast variation range
Brightness minimum (0.5 V)
Brightness typical (2.5 V)
Brightness maximum (4.5 V)
Soft control characteristics
Sharp control characteristics
Y signal frequency characteristics (1)
Y signal frequency characteristics (2)
Y signal frequency characteristics (3)
DC transmission ratio
Black expansion threshold
Black expansion maximum gain
[Chrominance Common]
R-Y output DC voltage
R-Y output AC voltage
B-Y output DC voltage
B-Y output AC voltage
R-Y input DC voltage
R-Y input AC voltage
R-Y input AC range
VB min
VB typ
VB max
dGSOFT
dGSHARP
BW1
0.4
1.9
3.4
–6.0
4.5
3.9
3.0
2.5
0.7
1.0
2.5
4.0
–2.0
10.5
4.9
3.7
3.2
V
2.2
V
3.7
V
–4.0
7.5
dB
dB
S-VHS
PAL
4.4
MHz
MHz
MHz
%
BW2
3.35
2.85
100
50
BW3
NTSC
dVAPL
BSTH
40
60
–6
IRE
IRE
BSmax
–20
–13
V39DC
E39AC
V38DC
E38AC
V37DC
E37AC
E37ALC
V36DC
E36AC
E36ALC
ECMIN
dGCC
dVC
3.6
0.45
3.6
4.0
0.60
4.0
4.4
0.75
4.4
V
Vp-p
V
0.35
4.2
0.5
0.65
5.0
Vp-p
V
4.6
0.45
160
4.2
0.60
200
4.6
0.75
250
5.0
Vp-p
mVp-p
V
B-Y input DC voltage
B-Y input AC voltage
B-Y input AC range
0.35
160
0.5
0.65
250
200
40
Vp-p
mVp-p
mVp-p
dB
200
Residual color
Contrast color amplitude characteristics
RGB output DC difference voltage
30
35
0
With no chrominance signal input
–0.3
+0.3
V
RGB output DC voltage temperature
characteristics
∂VC/∂T With no chrominance signal input
0
mV/°C
RGB output residual high-frequency level
RGB output residual carrier level
fSC output pin DC voltage
fSC output level P
E car
0.2
0.3
Vp-p
Vp-p
V
e car
With no chrominance signal input
V27OPN
4.5
0.14
0.19
1.0
5.0
0.2
5.3
V27ACP PAL
V27ACN NTSC
V27LO
0.26
0.33
1.6
Vp-p
Vp-p
V
fSC output level N
0.26
1.3
DEF COIN-L
Crystal switching threshold
PAL switching threshold
NT switching threshold
V27TH
400
µA
V18PTH
0.6
V
V18NTH
0.9
V
Continued from preceding page.
No. 5635-3/6
LA7688
Continued from preceding page.
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
max
[Chrominance System PAL Block]
ACC amplitude characteristics 1
ACC amplitude characteristics 2
Killer operating point
ACC1p
ACC2p
E KILp
dE KILp
E Bp
–2
+1
0
+4
dB
dB
–4
–37
1
+2
–25
7
–30
3
dB
Killer hysteresis
dB
RGB output level
Chrominance: 50%, color: typical
4.1
5.4
500
4.6
5.9
5.1
6.4
Vp-p
Vp-p
Hz
Maximum RGB output
EBmaxp Chrominance: 50%, color: maximum
APC pull-in range +
df scp+
df scp–
B/Rp
APC pull-in range –
–500
2.00
–0.46
–0.17
95
Hz
Demodulated output ratio B/R
Demodulated output ratio G/R
Demodulated output ratio G/B
Demodulation angle
1.50
–0.56
–0.21
85
1.78
–0.51
–0.91
90
double
double
double
deg
G/Rp
G/Bp
RBp
With no B-Y signal
With no R-Y signal
[Chrominance System NTSC Block]
ACC amplitude characteristics 1
ACC amplitude characteristics 2
ACC phase characteristics 1
ACC phase characteristics 2
Killer operating point
ACC1n
ACC2n
PCC1n
PCC2n
E KILn
dE KILn
E Bn
–2
–4
+1
0
+4
+2
dB
dB
–3
0
+3
deg
deg
dB
–5
0
+5
–40
1
–34
4
–29
8
Killer hysteresis
dB
RGB output level
Chrominance: 50%, color: typical
3.4
5.0
350
3.9
5.5
4.4
6.0
Vp-p
Vp-p
Hz
Maximum RGB output
EBmaxn Chrominance: 50%, color: maximum
APC pull-in range +
df scn+
df scn–
dP TI
R/Bn
G/Bn
RBn
APC pull-in range –
–350
+50
Hz
Tint control variation range
Demodulated output ratio R
Demodulated output ratio G
Demodulation angle RB
Demodulation angle GB
[RGB Block]
–33
0.81
0.24
95
deg
double
double
deg
deg
0.90
0.30
105
0.99
0.36
115
GBn
–130
–120
–110
OSD input level
E OSD
V OSD
Standard input, 100% white level
With no signal
0.7
3.2
1.0
0
Vp-p
V
OSD input DC voltage
2.9
0.8
3.5
1.2
F-BLK input threshold level
OSD output pedestal level difference
OSD output maximum
V28TH
V
V OSDC
OSDmax
–0.3
4.3
+0.3
5.3
Vp-p
Vp-p
Vp-p
E
4.8
0.6
OSD output minimum
E
OSDmin
0.3
0.9
Character signal output frequency
characteristics
BW OSD
5
7
MHz
TV-OSD crosstalk (C-Y)
CT TVC
CT OSDC
CT OSD
50
40
30
dB
dB
dB
OSD-TV crosstalk (C-Y)
Character signal inter-character crosstalk
[DEF Block]
Vertical free-running period 50
Vertical free-running period 60
Vertical synchronization maximum period 50
Vertical synchronization maximum period 60
Vertical synchronization minimum period 50
Vertical synchronization minimum period 60
Vertical blanking peak value
TVFREE50
TVFREE60
312.0
262.0
356.5
296.5
268.5
224.5
312.5
262.5
357.0
297.0
269.0
225.0
0.6
313.0
263.0
357.5
297.5
269.5
225.5
1.0
H
H
H
H
H
H
V
H
H
H
V
V
V
TVmax50 Horizontal synchronizing signal only
TVmax60 Horizontal synchronizing signal only
TVmin50
TVmin60
VHVBL
Vertical blanking pulse width 50
Vertical blanking pulse width 60
Vertical output pulse width
PWBLK50
PWBLK60
PWVOUT
VOUTH
23
19
23.5
19.5
8.5
24
20
8.0
5.3
4.0
9.0
Vertical output voltage H
5.6
5.9
Vertical output voltage M
VOUTM
4.3
4.6
Vertical output voltage L
VOUTL
0.3
Continued on next page.
No. 5635-4/6
LA7688
Continued from preceding page.
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
3.0
max
Vertical external trigger load resistance
Vertical automatic synchronization stop voltage
Horizontal AFC gate release voltage
Vertical output start VCC voltage
RTR
VSAS
VGS
SVV
∆fH
4.7
kΩ
V
1.4
1.9
2.0
2.5
4.7
V
4.2
V
Horizontal free-running deviation
–150
±450
0
+150
Hz
Horizontal free-running frequency VCC
dependence
∆fH/VCC
2
Hz
Horizontal pull-in range
fHPLL
SHV
Hz
V
Horizontal output start VCC voltage
AFC2 FBP peak value H
AFC2 FBP peak value M
AFC2 FBP peak value L
4.8
6.5
3.7
+0.2
23.8
17
5.2
7.0
FBPH
6.0
3.2
V
FBPM
4.2
V
FBPL
–0.3
21.8
14
+0.7
25.8
V
Horizontal output pulse width
Horizontal output phase maximum
Horizontal output phase center
Horizontal output phase minimum
Burst gate pulse width
PWHOUT
HPmax
HPcen
HPmin
PWBGP
TdBGP
V50
µs
µs
µs
µs
µs
µs
V
4.8
5.8
3.8
4
6.8
4.8
5
3
Burst gate pulse phase
–0.2
+0.3
1.1
4.1
+0.8
1.5
50/60 Hz output voltage 50
50/60 Hz output voltage 60
50/60 Hz input voltage 50
50/60 Hz input voltage 60
SECAM V pulse peak value
SECAM V pulse width
V60
3.8
0.5
V
V
V
IN50
V
IN60
7.0
2.6
V
SVH
1.8
2.2
V
SVW
11.0
11.5
12.0
H
No. 5635-5/6
LA7688
Test Circuit
■ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace
equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of
which may directly or indirectly cause injury, death or property loss.
■ Anyone purchasing any products described or contained herein for an above-mentioned use shall:
➀ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all
damages, cost and expenses associated with such use:
➁ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
■ Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied
regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of August, 1997. Specifications and information herein are subject to
change without notice.
No. 5635-6/6
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