LA7437A Просмотр технического описания (PDF) - SANYO -> Panasonic
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LA7437A Datasheet PDF : 8 Pages
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LA7437, 7437A
Functions
All VHS format VCR signal processing functions
R/P
REC
PB
Video amp.
Feed back clamp
Main LPF
YNR (AVNS)
VCA
Sync separator
4.2 V regulator
Luminance
Video AGC amp.
Video AGC det.
Pre LPF
Detail enhancer
1/2 fH carrier shift
FM AGC amp.
FM AGC det.
Double limiter
FM demodulator
Sub LPF
Double high pass noise canceller
QV/QH/character insert
Main de-emphasis
DOC
NL emphasis
Main emphasis
White/dark clip
FM modulator
Drop out det.
NL de-emphasis
Picture control
Y/C mix
4.43 BPF
ACC amp.
ACC det.
Main converter
1.3 M LPF
VXO/XO
Side lock det.
3rd lock protector
Chrominance
Half H killer
BGP generator
Killer det.
VCO
Phase shifter
Sub converter
5.06 BPF
Pre amp.
Burst emphasis (NTSC)
Killer
APC det.
AFC det.
Burst gate amp.
Pre amp.
Burst de-emphasis (NTSC)
PB amp.
Killer
NAP
PAL burst sequence
– Compensator
Carrier balancer
Burst gate amp.
APC det.
ID det.
DCC
Trick det.
DPLL
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
Allowable power dissipation
VCC max
Pd max Ta ≤ 65°C*
7.0
V
1350*
mW
Operating temperature
Topr
–10 to +65
°C
Storage temperature
Tstg
–40 to +150
°C
Note: * When mounted on a 70 mm by 65 mm, 1.5 mm thickness Bakelite board. The value for the DIP package is 1150 mW.
Operating Conditions at Ta = 25°C
Parameter
Recommended supply voltage
Operating supply voltage
Symbol
VCC
VCC op
Conditions
Ratings
Unit
5.0
V
4.8 to 5.5
V
Operating Characteristics at Ta = 25°C, VCC = 5.0 V
Parameter
Symbol
Conditions
min
typ
max
Unit
[Record Mode Y System]
Record mode current drain
EE output level 1
AGC characteristics 1
ICCR
VEE1
AGC1
Input: 1.0 Vp-p video signal
Input: 50 Hz system 1.0 Vp-p video signal
Input: 50 Hz system 2.0 Vp-p video signal
100
130
160
mA
2.0
2.1
2.2
Vp-p
2.11
2.21
2.31
Vp-p
AGC characteristics 2
AGC2 Input: 50 Hz system 0.5 Vp-p video signal
1.99
2.09
2.19
Vp-p
AGC characteristics 3
AGC3 Input: 50 Hz system with only SYNC increased 6 dB
590
660
730
mVp-p
AGC characteristics 4
AGC4 Input: 50 Hz system with only SYNC decreased 6 dB
340
380
420
mVp-p
Sync separator output level
Sync separator output pulse width
Sync separator output
prerecord delay time
VSYR
PWSYR
∆TSYR
The SYNC-OUT output pulse wave height
The SYNC-OUT output pulse width
The SYNC-OUT delay time
3.9
4.2
4.5
V
3.9
4.2
4.6
µs
0.9
1.1
1.3
µs
Sync separator threshold level
THSYR
–20
–15
dB
Continued on next page.
No. 5473-2/8
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