Sanyo LA70001 Record/playback amplifiers for vhs format vcr Datasheet

Ordering number : EN5709
Monolithic Linear IC
LA70001, 70001M
Record/Playback Amplifiers for VHS Format VCRs
Overview
Package Dimensions
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.
unit: mm
3067-DIP24S
[LA70001]
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.
SANYO: DIP24S
unit: mm
3112-MFP24S
[LA70001M]
Specifications
SANYO: MFP24S
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Symbol
Conditions
VCC max
Allowable power dissipation
Pd max
Ratings
Unit
7.0
V
Ta ≤ 65°C [LA70001]
600
mW
Ta ≤ 65°C [LA70001M]
(Using a 114.3 × 76.1 × 1.6 mm glass epoxy PCB)
500
mW
Operating temperature
Topr
–10 to +65
°C
Storage temperature
Tstg
–40 to +150
°C
Ratings
Unit
Operating Conditions at Ta = 25°C
Parameter
Symbol
Recommended supply voltage
VCC
Operating supply voltage range
VCC op
Conditions
5.0
V
4.8 to 5.5
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
13098RM (OT) No. 5709-1/8
LA70001, 70001M
Electrical Characteristics at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
min
typ
Unit
max
[Playback Mode]
Current drain
Voltage gain
ICCP
The pin 13 inflow current.
23
29
35
CH1
GVP1
VIN = 38 m Vp-p, f = 1 MHz
56
59
62
dB
CH2
GVP2
56
59
62
dB
–1
0
+1
dB
1.0
1.5
µVrms
∆GVP1
GVP1—GVP2
VNIN1
VNIN2
With the same conditions as for the voltage
gain, the ratio of the output passed through a
1.1-MHz low-pass filter and the output with no
input signal.
CH1
∆Vfp1
The ratio of the output for VIN = 38 mVp-p,
CH2
∆Vfp2
f = 7 MHz and GVP1, 2, 3, and 4.
Voltage gain difference 1
Equivalent input noise voltage
Frequency characteristics
CH1
CH2
Second harmonic distortion
CH1
CH2
VHDP1
VHDP2
With VIN = 38 mVp-p, f = 4 MHz, the ratio of
the 8-MHz output component (second
harmonic) and the 4-MHz component (the
fundamental).
Maximum output level
CH1
CH2
VOMP1
VOMP2
At f = 1 MHz, the output level when the ratio
of the 3-MHz output (third harmonic) and the
1-MHz output (fundamental) is –30 dB.
Crosstalk SP
Output DC offset
Envelope detector output pin voltage
VCR1
∆VODC1
1.0
dB
–35
1.2
dB
Vp-p
–40
–35
dB
–100
0
+100
mV
0
0.8
1.3
V
The T6 DC level when there is no input signal.
VENVSP1
With a f = 4 MHz input, the T6 DC level when
the T7A output level becomes 175 mVp-p.
2.0
2.5
3.0
V
VENVSP2
With a f = 4 MHz input, the T6 DC level when
the T7A output level becomes 400 mVp-p.
3.5
4.0
4.5
V
VENVEP1
With a f = 4 MHz input, the T6 DC level when
the T7A output level becomes 125 mVp-p.
2.0
2.5
3.0
V
VENVEP2
With a f = 4 MHz input, the T6 DC level when
the T7A output level becomes 300 mVp-p.
4.0
4.5
5.0
V
RPON18
Measure the difference in the DC levels with
a 1-mA and a 2-mA inflow current.
4
6
Ω
SW30-1
Lch → Hch *1
1.2
5.0
V
SW30-2
Hch → Lch
0.0
0.8
V
Envelope detector output pin voltage EP
SW30 threshold level
–40
The ratio of the VIN = 38 mVp-p, f = 4 MHz
output and GVP1.
CH1 – CH2
0
VENV
Envelope detector output pin voltage SP1
Switch transistor on resistance in playback
mode
–2.5
mA
[Record Mode]
Current drain
ICCR
The pin 13 inflow current.
Record AGC amplifier output level
VRSP
The output level when VIN = 400 mVp-p, f = 4 MHz.
Record AGC amplifier control
characteristics
∆VAGC1-SP
At f = 4 MHz, when VIN = 700 mVp-p: the
output level /VRSP, EP
∆VAGC2-SP
At f = 4 MHz, when VIN = 100 mVp-p: the
output level /VRSP, EP
43
50
57
mA
105
112
119
mVp-p
0.5
1.0
dB
–1.0
–0.5
dB
–1
0
+1
dB
–45
–40
dB
∆VFRS
At VIN = 400 mVp-p, the ratio of the outputs
when f is 1 MHz and 7 MHz, i.e. the ratio of
the 7-MHz value to the 1-MHz value.*2.
Record AGC amplifier second harmonic
distortion
∆VHDRS
With VIN = 400 mVp-p, f = 4 MHz, the ratio
of the 8-MHz output component (second
harmonic) and the 4-MHz component (the
fundamental).
Record AGC amplifier maximum output level
∆VMOSP
At f = 4 MHz, the output level at which the
second harmonic goes to –35 dB. *3
Record AGC amplifier muting attenuation
∆VMRS
When VIN = 400 mVp-p and f = 4 MHz, the
output level/VRSP, EP
–45
–40
dB
Record AGC amplifier cross modulation
relative level
∆VCYS
T9A: VIN = 400 mVp-p, f = 4 MHz
T10A: VIN = 2.4 Vp-p, f = 629 kHz
The ratio of the (4 MHz ± 629 kHz) and the 4-MHz outputs.
–45
–40
dB
V
Record AGC amplifier frequency
characteristics
Record muting threshold level
Record mode to playback mode threshold level
20
22
mAp-p
MUTE-1
MUTE OFF → MUTE ON *1
1.2
2.8
MUTE-2
MUTE ON → MUTE OFF
3.2
5.0
V
PB-REC
PB → REC *1
1.2
5.0
V
REC-PB
REC → PB
0.0
0.8
V
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. 5709-2/8
LA70001, 70001M
Pin Functions
Pin No.
Pin name
1
N.C
2
N.C
Standard DC voltage (V)
Equivalent circuit
Notes
EP
3
HA (EP/SP)
1.5 V
SP
Hch
4
SW30
1.0 V
Lch
SYNC
H
5
H-SYNC
1.5 V
L
6
7
8
20
PB
Provided in a
separate
document.
REC
0
PB
1.7
REC
2.1
ENVDET-OUT
PB-OUT
GND
Continued on next page.
No. 5709-3/8
LA70001, 70001M
Continued from preceding page.
Pin No.
9
10
Pin name
Standard DC voltage (V)
PB
4.0
REC
3.7
PB
4.0
REC
3.7
Equivalent circuit
Notes
REC-Y-IN
REC-C-IN
REC
3.0 V
11
REC
MUTE
REC/MUTE/PB
1.0 V
PB
12
13
14
PB
2.5 V
REC
2.5 V
PB
5.0
REC
4.5
REC-CURRENT-ADJ2
VCC
REC-CURRENT-ADJ1
Continued on next page.
No. 5709-4/8
LA70001, 70001M
Continued from preceding page.
Pin No.
15
16
19
17
18
21
22
23
24
Pin name
Standard DC voltage (V)
PB
0
REC
1.6
PB
2.1
REC
4.1
PB
2.1 V
REC
4.1 V
PB
0
REC
2.5
Equivalent circuit
Notes
REC-AGC-FILT
L IN
H IN
REC_SP_OUT
PB FILT
N.C
No. 5709-5/8
LA70001, 70001M
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.
Envelope Detection Voltage Characteristics
The pin 6 detected DC level (V)
EP when an 18 kΩ resistor is connected at pin 6.
SP when an 18 kΩ resistor is connected at pin 6.
The pin 7 playback output level (mVp-p)
No. 5709-6/8
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 VCC (approximately 2.5 V) by an internal bias, and the record current is determined by
Ro1.
Design value: When Ro1 is 1.5 kΩ, 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.
Record current (mAp-p) design value
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.
No. 5709-7/8
LA70001, 70001M
Block Diagram
■ 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.
■ Anyone purchasing any products described or contained herein for an above-mentioned use shall:
➀ 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:
➁ 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.
■ 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 January, 1998. Specifications and information herein are subject to
change without notice.
PS No. 5709-8/8
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