Page 1
Ordering number: EN 5108
Monolithic Linear IC
LA7411,7411M
Playback Amplifier and Record Amplifier
for VHS VCRs
Overview
The LA7411 and LA7411M are playback and record amplifier
IC for two-head VHS VCRs. When used in conjunction with
the video signal processing ICs of the LA7420/30 series, it is
possible to eliminate the need to adjust the Y/C record current.
Functions
.
2-channel playback amplifier.
.
1-channel record amplifier.
.
REC/PB mode switching head switch circuit.
.
Envelope wave detection (for auto-tracking).
Features
.
The record amplifier provides stable record characteristics in
constant current drive mode, which is able to withstand load
fluctuations. In addition, the built-in AGC eliminates the
need to adjust the record current.
.
Designed to share printed circuit boards with the
LA7416/7416M (for 4-head systems).
Package Dimensions
unit : mm
3067-DIP24S
21.2
0.48
[LA7411]
0.95
[LA7411M]
24
1
0.81 1.78
3112-MFP24S
24
13
6.4
7.62
12
3.25
3.9max
3.3
0.51min
SANYO : DIP24S
13
5.4
6.35
0.25
7.6
112
12.6
0.35
1.0
0.8
1.5
0.1
1.8max
0.15
SANYO : MFP24S
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
61295HA(II) No.5108-1/5
0.625
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LA7411,7411M
Specifications
Maximum Ratings atTa=25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Allowable power dissipation Pd max Ta %65°C
Operating temperature Topr –10 to +65
Storage temperature Tstg –40 to +150
*: LA7411M Pd max value which represents the value when mounted on the board.
Operating Conditions atTa=25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Operating supply voltage range V
Electrical Characteristics atTa=25°C
Parameter Symbol Input Output Conditions T1 T2 min typ max Unit
[PB Mode] T12: 5.0 V
Current consumption I
Voltage gain L CH1 G
Voltage gain H CH2 G
Voltage gain difference ∆G
Equivalent input
noise voltage
CH1 V
CH2 V
Frequency characteristics CH1 ∆Vfp1 T17A T7A VI= 38 mVp-p,
CH2 ∆Vfp2 T20A T7A 2.5 –2.5 +1 dB
Secondary
CH1 V
harmonic distortion
CH2 V
Maximum output level CH1 V
CH2 V
Cross-talk
CH1 V
(Note 1)
CH2 V
Output DC offset ∆V
Envelope wave detection
output pin voltage
Envelope wave detection voltage
SP1
Envelope wave detection voltage
SP2
Envelope wave detection voltage
EP1
CCP
NIN
NIN
HDP
HDP
OMP
OMP
V
V
ENVSP
V
ENVSP
V
ENVEP
VP1
VP2
VP1
CR
CR
ODC
ENV
1
2
1
2
1
2
1
2
1
1
2
1
max 7.0 V
CC
CC
op 4.8 to 5.5 V
CC
EP/SP SW30
T10: Open
MUTE
T4: Open (PB)
Pin 12
0 141822mA
input current
T17A T7A VI= 38 mVp-p
T20A T7A 2.5 56.5 59.5 62.5 dB
f=1MHz
G
— G
VP1
VP2
T17A T7A After 1.1 MHz
T20A T7A 2.5 1.1 1.5
LPF
V
OUT/GVP1,2
0 56.5 59.5 62.5 dB
–1 0 +1 dB
0 1.1 1.5
0 –2.5 +1 dB
f=7MHz
V
OUT/GVP1,2
output ratio
T17A T7A VI= 38 mVp-p,
0 –40 –35 dB
f=4MHz
T20A T7A 2.5 –40 –35 dB
8 M component
4 M component
output ratio
T17A T7A f=1MHz
0 1.0 1.2 Vp-p
Output level when
T20A T7A 2.5 1.0 1.2 Vp-p
tertiary distortion
of the output is
–30 dB
T20A T7A VI= 38 mVp-p,
0 –40 –35 dB
f=4MHz
T17A T7A 2.5 –40 –35 dB
V
OUT/GVP1,2
output ratio
T7 CH1–CH2 0 –100 0 +100 mV
2.5
T5 T5 DC voltage
0 0 0 0.8 1.5 V
with no input
T17A T5 f = 4 MHz,
0 0 2.0 2.5 3.0 V
T7A: Adjusted to
175 mVp-p
T17A T5 f = 4 MHz,
0 0 4.5 4.8 5.0 V
T7A: Adjusted to
450 mVp-p
T17A T5 f = 4 MHz,
5.0 0 2.0 2.5 3.0 V
T7A: Adjusted to
125 mVp-p
700 mW
*500 mW
°
°
5.0 V
C
C
µVrms
µVrms
Note 1: Status where input stage L (8.2 µH) is shorted
‘‘*’’ represents output pins.
No.5108-2/5
Page 3
LA7411,7411M
Electrical Characteristics atTa=25°C
Parameter Symbol Input Output Conditions T10 T2 min typ max Unit
Envelope wave detection voltage
EP2
ON resistance of SW-Tr which is
turned ON in PB mode
Threshold level EP/SP EPS-1 T1 SP → EP * 1.7 5.0 V
Threshold level SW30 SW30-1 T2 Lch → Hch * 1.2 5.0 V
[REC Mode] T12: 5.0 V
Current consumption I
REC AGC
Amp output level
AGC Amp
control characteristics 1
AGC Amp
control characteristics 2
AGC Amp
frequency characteristics (Note 2)
AGC Amp
secondary harmonic level
AGC Amp
maximum output level (Note 3)
AGC Amp
mute attenuation
REC
AGC Amp
mixed modulation relative level
ON resistance of SW-Tr which is
turned ON in REC mode
REC MUTE threshold level MUTE-1 T2 MUTE OFF →
REC/PB threshold level SW
V
2
ENVEP
T17A T5 f = 4 MHz,
T7A: Adjusted to
5.0 0 4.5 4.8 5.0 V
350 mVp-p
R
PON
14
P-14 DC difference
measured for 1
4.0 6.0 Ω
mA, 2 mA
current inflow
EPS-2 T1 EP → SP * 0.0 1.3 V
SW30-2 T2 Hch → Lch * 0.0 0.8 V
REC
T3: 5.0 V
Adj2
SW30
MUTE
T4: 5.0 V(REC)
∆V
∆V
CCP
∆V
V
R
AGC
AGC
FR
T8A T18A f = 4 MHz
1
T8A T18A f = 4 MHz,
2
T8A T18A f = 4 MHz,
T8A T18A f = 1 M, 7 MHz
Pin 12
input c urrent
V
= 200 mVp-p
I
V
= 400 mVp-p
I
Output level/
V
RSP, EP
V
I
Output level/
V
RSP, EP
V
I
7 MHz/1 MHz,
ratio
= 100 mVp-p
ratio
= 200 mVp-p
Open 0 38 46 54 mA
Open 0 116 123 130 mVp-p
Open 0 0.5 1.0 dB
Open 0 –1.0 –0.5 dB
Open 0 –4.0 –3.0 –2.0 dB
output ratio
∆V
HDR
T8A T18A f = 4 MHz,
V
= 200 mVp-p
I
8 M component
Open 0 –45 –40 dB
4 M component
output ratio
∆V
OMR
T8A T18A f = 4 MHz,
output level when
Adj. 0 20 22 mAp-p
secondary
distortion of the
output is –35 dB
∆V
∆V
MR
CY
T8A T18A f = 4 MHz,
V
= 200 mVp-p
I
Output level/
V
RSP, EP
ratio
T7A T18A T6A: f = 629 kHz,
V
= 360 mVp-p
I
T7A: f = 4 MHz,
V
T8A T18A Open 0 –45 –40 dB
= 200 mVp-p
I
(4 M±629 k)/4 M
Open 5.0 –45 –40 dB
Open 0 –45 –40 dB
output ratio
R
R
RON
RON
17
20
P-17 DC difference
4.0 6.0 Ω
measured for
1 mA, 2 mA
P-20 4.0 6.0 Ω
current inflow
*3.4 5.0 V
ON
MUTE-2 T2 MUTE ON →
*0.0 3.0 V
OFF
REC/PB
T4: Control
voltage
2.2 5.0 V
Note 2: Apply approximately 1.8 V DC to the AGC wave detection filter pin (pin 9) and fix the amplifier gain for measurement.
Note 3: Apply DC voltage to T10 (REC CUR. ADJ2) and adjust the output level.
Note : Use a resistor with a tolerance of ± 1.0% between pins 11 and 12.
‘‘*’’ represents output pins.
No.5108-3/5
Page 4
Test Circuit Diagram
LA7411,7411M
Sample Application Circuit
Tolerance
No.5108-4/5
Page 5
LA7411,7411M
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer’s
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer’s products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co. , Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”
for the SANYO product that you intend to use.
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 June, 1995. Specifications and information herein are subject to
change without notice.
PS No.5108-5/5
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