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参数资料
| 型号： | LA7688B |
| 元件分类： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP52 |
| 封装： | 0.600 INCH, DIP-52 |
| 文件页数： | 15/20页 |
| 文件大小： | 316K |
| 代理商： | LA7688B |
LA7688B
No.0077-4/20
Continued from preceding page.
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
fsc output pin DC voltage
V27 OPN
4.5
5.0
5.3
V
fsc output level P
V27 ACP
PAL
0.14
0.2
0.26
Vp-p
fsc output level N
V27 ACN
NTSC
0.19
0.26
0.33
Vp-p
DEF COIN-L
V27 LO
1.0
1.3
1.6
V
Xtal SW threshold
V27 TH
400
A
PAL SW threshold
V18 PTH
0.6
V
NT SW threshold
V18 NTH
0.9
V
[Chroma PAL block]
ACC amplitude characteristics 1
ACC1p
-2
1
+4
dB
ACC amplitude characteristics 2
ACC2p
-4
0
+2
dB
Killer operating point
E KILp
-37
-30
-25
dB
Killer hysteresis
dE KILp
1
3
7
dB
RGB output level
E Bp
Chroma 50%, Color typ
3.5
4.0
4.5
Vp-p
Maximum RGB output
EBMAXp
Chroma 50%, Color max
5.0
5.5
6.0
Vp-p
APC pull-in range+
df scp+
500
Hz
APC pull-in range-
df scp-
-500
Hz
Demodulator output ratio B/R
B/Rp
1.5
1.78
2.00
double
Demodulator output ratio G/R
G/Rp
B-Y no signal
-0.56
-0.51
-0.46
double
Demodulator output ratio G/B
G/Bp
R-Y no signal
-0.21
-0.19
-0.17
double
Demodulation angle
RBp
85
90
95
deg
[Chroma NTSC block]
ACC amplitude characteristics 1
ACC1n
0
3
+6
dB
ACC amplitude characteristics 2
ACC2n
-4
0
+2
dB
ACC phase characteristics 1
PCC1n
-5
0
+5
deg
ACC phase characteristics 2
PCC2n
-5
0
+5
deg
Killer operating point
E KILn
-40
-34
-29
dB
Killer hysteresis
dE KILn
1
4
8
dB
RGB output level
E Bn
Chroma 50%, Color typ
2.8
3.2
3.6
Vp-p
Maximum RGB output
EBMAXn
Chroma 50%, Color max
4.5
5.0
5.5
Vp-p
APC pull-in range+
df scn+
350
Hz
APC pull-in range-
df scn-
-350
Hz
Tint variable range
dP TI
-33
+50
deg
Demodulator output ratio R
R/Bn
0.81
0.9
0.99
double
Demodulator output ratio G
G/Bn
0.24
0.30
0.36
double
Demodulation angle RB
RBn
95
105
115
deg
Demodulation angle GB
GBn
-130
-120
-110
deg
[RGB block]
OSD input level
E OSD
Typical input, 100% white level
0.7
Vp-p
OSD input DC voltage
V OSD
No signal
2.9
3.2
3.5
V
F-BLK input threshold level
V28 TH
0.8
1.0
1.2
V
OSD output pedestal level
V OSDC
-0.3
0
+0.3
Vp-p
OSD output MAX
E OSD max
4.3
4.8
5.3
Vp-p
OSD output MIN
E OSD min
0.3
0.6
0.9
Vp-p
OSD signal frequency characteristics
BW OSD
5
7
MHz
TV-OSD crosstalk (R, G, B)
C TTVY
50
dB
OSD-TV crosstalk (R, G, B)
C TOSDC
40
dB
Teletext inter channel CH crosstalk
C TOSD
30
dB
[DEF block]
Horizontal free-running frequency 50
TVFREE50
312
312.5
313
H
Horizontal free-running frequency 60
TVFREE60
262
262.5
263
H
Continued on next page.
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