Overview
The LA70001 and LA70001M ICs provide record and
playback amplifiers for VHS format VCRs. A system with
an adjustment-free Y/C record current can be achieved by
combining the LA70001/M with an LA71000M or
LA71500M video signal processing IC.
Features
Direct connection of the head to the playback amplifier
input allows the number of external devices to be
reduced.
A fixed-current drive technique that is strongly resistant
to load fluctuations is adopted in the record amplifier for
stable recording characteristics. The record amplifier
includes a built-in AGC circuit.
These products have the same package dimensions as
the LA70011 and LA70011M to allow a common PCB
to be used. These products can also share the same PCB
with the LA70020 by mounting the IC at the right end of
the LA70020 socket.
Package Dimensions
unit: mm
3067-DIP24S
unit: mm
3112-MFP24S
Monolithic Linear IC
13098RM (OT) No. 5709-1/8
SANYO: DIP24S
[LA70001]
SANYO: MFP24S
[LA70001M]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
Record/Playback Amplifiers for VHS Format VCRs
LA70001, 70001M
Ordering number : EN5709
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
7.0
V
Ta
65C [LA70001]
600
mW
Allowable power dissipation
Pd max
Ta
65C [LA70001M]
500
mW
(Using a 114.3
76.1
1.6 mm glass epoxy PCB)
Operating temperature
Topr
10 to +65
C
Storage temperature
Tstg
40 to +150
C
Specifications
Maximum Ratings
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V
CC
5.0
V
Operating supply voltage range
V
CC
op
4.8 to 5.5
V
Operating Conditions
at Ta = 25C
No. 5709-2/8
LA70001, 70001M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
[Playback Mode]
Current drain
I
CCP
The pin 13 inflow current.
23
29
35
mA
Voltage gain
CH1
G
VP
1
V
IN
= 38 m Vp-p, f = 1 MHz
56
59
62
dB
CH2
G
VP
2
56
59
62
dB
Voltage gain difference 1
G
VP
1
G
VP
1--G
VP
2
1
0
+1
dB
With the same conditions as for the voltage
Equivalent input noise voltage
CH1
V
NIN
1
gain, the ratio of the output passed through a
CH2
V
NIN
2
1.1-MHz low-pass filter and the output with no
1.0
1.5
Vrms
input signal.
Frequency characteristics
CH1
V
fp
1
The ratio of the output for V
IN
= 38 mVp-p,
CH2
V
fp
2
f = 7 MHz and G
VP
1, 2, 3, and 4.
2.5
0
dB
With V
IN
= 38 mVp-p, f = 4 MHz, the ratio of
Second harmonic distortion
CH1
V
HDP
1
the 8-MHz output component (second
CH2
V
HDP
2
harmonic) and the 4-MHz component (the
40
35
dB
fundamental).
CH1
V
OMP
1
At f = 1 MHz, the output level when the ratio
Maximum output level
CH2
V
OMP
2
of the 3-MHz output (third harmonic) and the
1.0
1.2
Vp-p
1-MHz output (fundamental) is 30 dB.
Crosstalk SP
V
CR
1
The ratio of the V
IN
= 38 mVp-p, f = 4 MHz
40
35
dB
output and G
VP
1.
Output DC offset
V
ODC
1
CH1 CH2
100
0
+100
mV
Envelope detector output pin voltage
V
ENV
The T6 DC level when there is no input signal.
0
0.8
1.3
V
V
ENVSP
1
With a f = 4 MHz input, the T6 DC level when
2.0
2.5
3.0
V
Envelope detector output pin voltage SP1
the T7A output level becomes 175 mVp-p.
V
ENVSP
2
With a f = 4 MHz input, the T6 DC level when
3.5
4.0
4.5
V
the T7A output level becomes 400 mVp-p.
V
ENVEP
1
With a f = 4 MHz input, the T6 DC level when
2.0
2.5
3.0
V
Envelope detector output pin voltage EP
the T7A output level becomes 125 mVp-p.
V
ENVEP
2
With a f = 4 MHz input, the T6 DC level when
4.0
4.5
5.0
V
the T7A output level becomes 300 mVp-p.
Switch transistor on resistance in playback
R
PON
18
Measure the difference in the DC levels with
4
6
mode
a 1-mA and a 2-mA inflow current.
SW30 threshold level
SW30-1
Lch
Hch
*
1
1.2
5.0
V
SW30-2
Hch
Lch
0.0
0.8
V
[Record Mode]
Current drain
I
CCR
The pin 13 inflow current.
43
50
57
mA
Record AGC amplifier output level
V
RSP
The output level when V
IN
= 400 mVp-p, f = 4 MHz.
105
112
119
mVp-p
V
AGC
1-SP
At f = 4 MHz, when V
IN
= 700 mVp-p: the
0.5
1.0
dB
Record AGC amplifier control
output level /VRSP, EP
characteristics
V
AGC
2-SP
At f = 4 MHz, when V
IN
= 100 mVp-p: the
1.0
0.5
dB
output level /VRSP, EP
Record AGC amplifier frequency
At V
IN
= 400 mVp-p, the ratio of the outputs
characteristics
V
FRS
when f is 1 MHz and 7 MHz, i.e. the ratio of
1
0
+1
dB
the 7-MHz value to the 1-MHz value.
*
2.
With V
IN
= 400 mVp-p, f = 4 MHz, the ratio
Record AGC amplifier second harmonic
V
HDRS
of the 8-MHz output component (second
45
40
dB
distortion
harmonic) and the 4-MHz component (the
fundamental).
Record AGC amplifier maximum output level
V
MOSP
At f = 4 MHz, the output level at which the
20
22
mAp-p
second harmonic goes to 35 dB.
*
3
Record AGC amplifier muting attenuation
V
MRS
When V
IN
= 400 mVp-p and f = 4 MHz, the
45
40
dB
output level/VRSP, EP
Record AGC amplifier cross modulation
T9A: V
IN
= 400 mVp-p, f = 4 MHz
relative level
V
CYS
T10A: V
IN
= 2.4 Vp-p, f = 629 kHz
45
40
dB
The ratio of the (4 MHz 629 kHz) and the 4-MHz outputs.
Record muting threshold level
MUTE-1
MUTE OFF
MUTE ON
*
1
1.2
2.8
V
MUTE-2
MUTE ON
MUTE OFF
3.2
5.0
V
Record mode to playback mode threshold level
PB-REC
PB
REC
*
1
1.2
5.0
V
REC-PB
REC
PB
0.0
0.8
V
Electrical Characteristics
at Ta = 25C
Notes:Use a resistor with an accuracy of 1.0% for the resistor between pins 13 and 14.
*
1. This is the voltage application point
*
2. Here, fix the AGC amplifier gain by applying a 1.8-V DC level to the AGC detector filter pin (pin 15).
*
3. Here, adjust the output level by applying a DC voltage to the REC-CUR-Adj pin (pin 12).
No. 5709-3/8
LA70001, 70001M
Pin Functions
Pin No.
Pin name
Standard DC voltage (V)
Equivalent circuit
Notes
1
N.C
2
N.C
3
4
5
6
7
8
20
HA (EP/SP)
SW30
H-SYNC
ENVDET-OUT
PB
REC
PB
REC
Provided in a
separate
document.
EP
1.5 V
SP
Hch
1.0 V
Lch
SYNC
H
1.5 V
L
0
1.7
2.1
PB-OUT
GND
Continued on next page.
No. 5709-4/8
LA70001, 70001M
Continued from preceding page.
Pin No.
Pin name
Standard DC voltage (V)
Equivalent circuit
Notes
9
10
11
12
13
14
REC-Y-IN
REC-C-IN
REC/MUTE/PB
REC-CURRENT-ADJ2
V
CC
REC-CURRENT-ADJ1
PB
REC
4.0
3.7
PB
REC
4.0
PB
REC
2.5 V
2.5 V
PB
5.0
REC
4.5
3.7
REC
3.0 V
1.0 V
REC
MUTE
PB
Continued on next page.
No. 5709-5/8
LA70001, 70001M
Continued from preceding page.
Pin No.
Pin name
Standard DC voltage (V)
Equivalent circuit
Notes
15
16
19
17
18
21
22
23
24
REC-AGC-FILT
L IN
H IN
REC_SP_OUT
PB FILT
N.C
PB
PB
PB
PB
REC
REC
REC
REC
0
2.1
2.1 V
0
1.6
4.1
4.1 V
2.5
Usage Notes
Control Pin Logic
HA-SW (EP/SP mode switching): pin 3
GND < the pin 3 DC level < 1.5 V: SP mode
1.5 V < the pin 3 DC level < 5 V: EP mode
H.SYNC input: pin 5
The pin 5 DC level > 1.5 V: The horizontal synchronization period
In record mode: Used as the REC-AGC-AMP synchronization block gate pulse.
REC/REC-MUTE/PB switching: pin 11
GND < the pin 11 DC level < 1.0 V: Playback mode
1.0 V < the pin 11 DC level < 3.0 V: Record mode with recording
muted.
3.0 V < the pin 11 DC level < 5.0 V: Record mode
Envelope detection characteristics: pin 6
The LA70001 provides a built-in playback signal envelope detection circuit so that the tracking adjustment can be made
automatic.
No. 5709-6/8
LA70001, 70001M
The pin 7 playback output level (mVp-p)
The pin 6 detected DC level (V)
Envelope Detection Voltage Characteristics
EP when an 18 k
resistor is connected at pin 6.
SP when an 18 k
resistor is connected at pin 6.
No. 5709-7/8
LA70001, 70001M
Record Amplifier Gain Control
The LA70001 achieves an adjustment-free record current by adding an AGC circuit in the record amplifier block. The
record current can be modified using the following method.
Record current adjustment 2: When left open.
Pin 12 DC level is set to 1/2 V
CC
(approximately 2.5 V) by an internal bias, and the record current is determined by
Ro1.
Design value: When Ro1 is 1.5 k
, the record current will be 12.7 mA per channel.
Record current adjustment 2: When used.
The gain can be varied by 6.0 dB to +3.5 dB relative to the value set by Ro1 by applying a control DC voltage of
between 1 and 4 V to pin 12.
Note: The technique shown in the figure below can be used to apply a DC level to pin 12. This allows a control voltage of between 1 and 4 V to be applied.
Record current (mAp-p) design value
PS No. 5709-8/8
LA70001, 70001M
This catalog provides information as of January, 1998. Specifications and information herein are subject to
change without notice.
s
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.
s
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
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:
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.
s
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.
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