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PDF LA70020M Data sheet ( Hoja de datos )
| Número de pieza | LA70020M | |
| Descripción | Recording/Playback Amplifier for VHS VCRs | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Ordering number : EN5711A
Monolithic Linear IC
LA70020, 70020M
Recording/Playback Amplifier for VHS VCRs
Overview
The LA70020 and LA70020M are 6-head amplifiers
adding hi-fi recording/playback amplifiers to the
LA70011/LA70011M recording/playback amplifiers for
VHS VCR video signals. When used in combination with
the LA71000M and LA71500M Series of video signal
processing ICs, they permit Y/C recording without current
adjustment.
Features
• Combining hi-fi and video amplifiers onto a single chip
saves space on the circuit board.
• Connecting the playback amplifier input directly to the
head reduces the number of external elements required.
• The recording amplifiers use a fixed-current drive
configuration that yields stable recording characteristics
even under changing loads. They include built-in
automatic gain control circuits.
• The LA70020, encapsulated in DIP package, can be
mounted at the right end of the LA70001 and LA70011
sockets. The LA70020M lacks this flexibility because its
MFP package has a different pin pitch.
Package Dimensions
unit: mm
3170-DIP36S 400mil
[LA70020]
unit: mm
3129-MFP36SD, MFP36SLF
[LA70020M]
SANYO: DIP36S
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum power supply voltage
Maximum power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Topr
Tstg
Conditions
Ta ≤ 65°C [LA70020]
Ta ≤ 65°C [LA70020M]
114.3 × 76.1 × 1.6 mm: glass epoxy
Operating Conditions at Ta = 25°C
Parameter
Recommended supply voltage
Operating supply voltage range
Symbol
VCC
VCCop
Conditions
SANYO: MFP36SD
SANYO: MFP36SLF
Ratings
6.0
1000
1000
–10 to +65
–40 to +150
Unit
V
mW
mW
°C
°C
Ratings
5.0
4.8 to 5.3
Unit
V
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
22798RM (OT) No. 5711-1/13
1 page  
Pin Descriptions
Pin Number Pin Name
LA70020, 70020M
Standard DC Voltage (V)
Equivalent Circuit
PB
HiFi
1
PB-FM-OUT
REC
2.6
4.0
2 HiFi
31 GND
PB
HiFi
3
REC-FM-IN
REC
0
3.0
PB
HiFi
4
REC-AGC-Filt
REC
0
1.2
PB
HiFi
5 REC-CURRENT-
ADJ
REC
0.7
1.5
HiFi
6 RF-SW
(REC-MUTE)
Notes
SW30 MUTE
ON
3.2 V
Hch
1.0
Lch
OFF
Continued on next page.
No. 5711-5/13
5 Page 
LA70020, 70020M
Comparator Output: Pin 8
EP envelope > SP envelope: High (min. 4.0 V)
EP envelope < SP envelope: Low (max. 0.7 V)
H-SYNC Input: Pin 11
Pin 11 level - DC > 1.5 V: H-SYNC interval
Video circuit operation only
Playback:
— Determines timing of HA switching (EP/SP)
— Determines timing of special playback
Recording:
— Serves as gate pulse for REC-AGC-AMP SYNC unit
REC/REC-MUTE/PB Switching: Pin 17
Envelope Detector Characteristic: Pin 12
The LA70020 includes a built-in playback signal envelope detector circuit for use in automating tracking adjustment.
Envelope detector voltage characteristic
Pin 12 level - detector
DC level (V)
EP, with 18-k<OMEGA_UC> resistor on pin 12
SP, with 18-k<OMEGA_UC> resistor on pin 12
Pin 12 level - playback output level (mVp-p)
No. 5711-11/13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LA70020M.PDF ] | |
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