Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
7.0
V
Allowable power dissipation
Pd max
Ta 65 C
650
W
Operating temperature
Topr
10 to +65
C
Storage temperature
Tstg
40 to +150
C
43097HA(OA) No. 5647-1/12
Overview
The LA7415 is a record and playback amplifier IC for
VHS format VCR decks. In combination with a Sanyo
LC7420 or LA7430 Series video signal processing IC, the
LA7415 can provide an adjustment-free Y/C record
current.
Features
Record amplifier: Provides stable recording
characteristics using a fixed-current drive technique that
is resistant to load variations.
REC-AMP: Includes a built-in AGC circuit.
Can use the same printed circuit board as the LA7411.
Package Dimension
unit: mm
3061-DIP30S
SANYO: DIP30S
[LA7415]
LA7415
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
VHS VCR Playback Head and Record Amplifiers
Monolithic Linear IC
Specifications
Maximum Ratings
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
V
CC
5.0
V
Operating voltage range
V
CC
op
4.8 to 5.5
V
Operating Conditions
at Ta = 25C
No. 5647
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
Input Output
T2
T4
T5
[Playback Mode]
T15: 5.0 V, T13: OPEN,
TRCK
HA
SW30
T7: OPEN
MUTE
Current drain
I
CCP
Pin 15 influx current
OPEN
0
0
24
30
36
mA
SP L
CH1
VG
P
1
T20A T10A
OPEN
0
0
54.0
57.0
60.0
dB
Voltage gain
SP H CH2
VG
P
2
T23A T10A
V
IN
= 38 mVp-p,
OPEN
0
2.5
54.0
57.0
60.0
dB
EP L
CH3
VG
P
3
T27A T10A
f = 1 MHz
OPEN
5.0
0
56.0
59.0
62.0
dB
EP H CH4
VG
P
4
T30A T10A
OPEN
5.0
2.5
56.0
59.0
62.0
dB
Voltage gain differential 1
VG
P
1
VG
P
1 VG
P
2
1
0
+1
dB
Voltage gain differential 2
VG
P
2
VG
P
3 VG
P
4
1
0
+1
dB
Inter-mode gain difference
VG
P EP-SP
VG
P
3 VG
P
1
1
2
3
dB
CH1
V
NIN
1
T20A T10A
After the 1.1-MHz LPF
OPEN
0
0
1.1
1.5
Vrms
Equivalent input
CH2
V
NIN
2
T23A T10A
V
OUT
OPEN
0
2.5
1.1
1.5
Vrms
noise voltage
CH3
V
NIN
3
T27A T10A
VG
P
1, 2, 3, 4
OPEN
5.0
0
1.1
1.5
Vrms
CH4
V
NIN
4
T30A T10A
OPEN
5.0
2.5
1.1
1.5
Vrms
CH1
Vfp1
T20A T10A
V
IN
= 38 mVp-p
OPEN
0
0
2.5
0
dB
Frequency
CH2
Vfp2
T23A T10A
f = 7 MHz
OPEN
0
2.5
2.5
0
dB
characteristics
CH3
Vfp3
T27A T10A
V
OUT
OPEN
5.0
0
2.5
0
dB
CH4
Vfp4
T30A T10A
VG
P
1, 2, 3, 4 output ratio
OPEN
5.0
2.5
2.5
0
dB
CH1
V
HDP
1
T20A T10A
V
IN
= 38 mVp-p
OPEN
0
0
40
35
dB
Second harmonic
CH2
V
HDP
2
T23A T10A
f = 4 MHz
OPEN
0
2.5
40
35
dB
distortion
CH3
V
HDP
3
T27A T10A
(8-MHz component)/(4-MHz component) OPEN
5.0
0
40
35
dB
CH4
V
HDP
4
T30A T10A
output ratio
OPEN
5.0
2.5
40
35
dB
CH1
V
OMP
1
T20A T10A
f = 1 MHz
OPEN
0
0
1.0
1.2
Vp-p
Maximum
CH2
V
OMP
2
T23A T10A
The output level when the third
OPEN
0
2.5
1.0
1.2
Vp-p
output level
CH3
V
OMP
3
T27A T10A
harmonic in the output is 30 dB
OPEN
5.0
0
1.0
1.2
Vp-p
CH4
V
OMP
4
T30A T10A
OPEN
5.0
2.5
1.0
1.2
Vp-p
T23A T10A
OPEN
0
0
40
35
dB
CH1
V
CR
1
T27A T10A
V
IN
= 38 mVp-p,
OPEN
0
0
40
35
dB
Crosstalk SP
T30A T10A
f = 4 MHz
OPEN
0
0
40
35
dB
(Note 1)
T20A T10A
V
OUT
OPEN
0
2.5
40
35
dB
CH2
V
CR
2
T27A T10A
VG
P
1, 2
OPEN
0
2.5
40
35
dB
T30A T10A
OPEN
0
2.5
40
35
dB
T23A T10A
OPEN
5.0
0
40
35
dB
CH3
V
CR
3
T27A T10A
V
I
= 38 mVp-p,
OPEN
5.0
0
40
35
dB
Crosstalk EP
T30A T10A
f = 4 MHz
OPEN
5.0
0
40
35
dB
(Note 1)
T20A T10A
V
OUT
OPEN
5.0
2.5
40
35
dB
CH4
V
CR
4
T27A T10A
VG
P
3, 4
OPEN
5.0
2.5
40
35
dB
T30A T10A
OPEN
5.0
2.5
40
35
dB
V
ODC
1
T10
CH1-CH2
OPEN
0
100
0
+100
mV
OPEN
0
2.5
100
0
+100
mV
V
ODC
2
T10
CH3-CH4
OPEN
0
100
0
+100
mV
OPEN
5.0
2.5
100
0
+100
mV
V
ODC
3
T10
CH1-CH3
OPEN
0
100
0
+100
mV
Output DC
OPEN
5.0
0
100
0
+100
mV
offset
V
ODC
4
T10
CH2-CH4
OPEN
0
100
0
+100
mV
OPEN
5.0
2.5
100
0
+100
mV
V
ODC
5
T10
CH1-CH4
OPEN
0
0
100
0
+100
mV
OPEN
5.0
2.5
100
0
+100
mV
V
ODC
6
T10
CH2-CH3
OPEN
0
2.5
100
0
+100
mV
OPEN
5.0
0
100
0
+100
mV
No. 5647-2/12
LA7415
Electrical Characteristics
at Ta = 25C
Note 1. With the input inductor L (8.2 H) shorted.
2. Since the T4 (HA) control switch timing is synchronized with T6 (H-Sync), a T6 trigger (0 - 5 V - 0) must be input before measuring each of these items.
Continued on the next page.
No. 5647-3/12
LA7415
Continued from the preceding page.
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
Input Output
T2
T4
T5
T15: 5.0 V, T13: OPEN,
TRCK
HA
SW30
T7: OPEN
MUTE
Enveloped detector
V
ENV
T8
The T8 DC voltage with no input
OPEN
0
0
0
0.4
0.8
V
output pin voltage
Enveloped detector
V
ENVSP1
T20A
T8
f = 4 MHz
OPEN
0
0
2.1
2.6
3.1
V
voltage SP1
T10A: Adjusted to 300 mV p-p
Enveloped detector
V
ENVSP2
T20A
T8
f = 4 MHz
OPEN
0
0
4.5
4.8
5.0
V
voltage SP2
T10A: Adjusted to 600 mV p-p
Enveloped detector
V
ENVEP1
T27A
T8
f = 4 MHz
OPEN
5.0
0
2.0
2.6
3.0
V
voltage EP1
T10A: Adjusted to 200 mV p-p
Enveloped detector
V
ENVEP2
T27A
T8
f = 4 MHz
OPEN
5.0
0
4.5
4.8
5.0
V
voltage EP2
T10A: Adjusted to 450 mV p-p
Comparator
V
COMP1
T20A
T3
f = 4 MHz, V
IN
= 38 mVp-p
5.0
0
0
0.4
0.7
V
output voltage 1
The T3 DC voltage
Comparator
V
COMP2
T20A
T3
f = 4 MHz, V
IN
= 38 mVp-p
5.0
5.0
0
4.5
4.8
V
output voltage 2
The T3 DC voltage
Playback mode on switching
R
PON
17
P-17
The difference in the DC measurement
4.0
6.0
transistor on resistance
R
PON
18
P-18
for 1-mA and 2-mA influx currents
4.0
6.0
Playback mode
R
PON
21
P-21
OPEN
5.0
4.0
6.0
mode switching
R
PON
24
P-24
The difference in the DC measurement
OPEN
5.0
4.0
6.0
transistor on
R
PON
26
P-26
for 1-mA and 2-mA influx currents
OPEN
0
4.0
6.0
resistance
R
PON
29
P-29
OPEN
0
4.0
6.0
Trick 1 threshold
TR1-1
T2
Normal
Trick1
*
3.2
5.0
V
level
TR1-2
T2
Trick1
Normal
*
1.2
2.8
V
Trick 2 threshold
TR2-1
T2
Normal
Trick2
*
0.0
0.8
V
level
TR2-2
T2
Trick2
Normal
*
1.2
2.8
V
HAPB threshold
HAP-1
T4
SP
EP
*
1.8
5.0
V
level
HAP-2
T4
EP
SP
*
0.0
1.4
V
SW30 threshold
SW30-1
T5
Lch
Hch
*
1.2
5.0
V
level
SW30-2
T4
Hch
Lch
*
0.0
0.8
V
T2
T4
T5
[Record Mode]
T15: 5.0 V, T2: OPEN,
REC
HA
SW30
T6: 5.0 V, T7: 5.0 V
Adj2
MUTE
Current drain
I
CCR
The pin 15 influx current
OPEN
0
0
44
55
66
mA
AGC amplifier
V
RSP
T11A T21A
f = 4 MHz
OPEN
0
0
147
156
165 mVp-p
output level
V
REP
T11A T26A
V
IN
= 200 mVp-p
OPEN
5.0
0
116
123
130 mVp-p
Inter-mode gain
VG
R
V
RSP
/V
REP
1.30
2.05
2.80
dB
difference
AGC amplifier control
V
AGC
1-SP T11A T21A
f = 4 MHz, V
IN
= 400 mVp-p
OPEN
0
0
0.5
1.0
dB
characteristics 1
V
AGC
1-EP T11A T26A
The output level/V
RSP, EP
ratio
OPEN
5.0
0
0.5
1.0
dB
AGC amplifier control
V
AGC
2-SP T11A T21A
f = 4 MHz, V
IN
= 100 mVp-p
OPEN
0
0
1.0
0.5
dB
characteristics 2
V
AGC
2-EP T11A T26A
The output level/V
RSP, EP
ratio
OPEN
5.0
0
1.0
0.5
dB
AGC amplifier frequency
V
FRS
T11A T21A
f = 1 MHz, 7 MHz, V
IN
= 100 mVp-p
OPEN
0
0
1.0
0.0
+1.0
dB
characteristics
V
FRE
T11A T26A
The 7 MHz/1 MHz output ratio
OPEN
5.0
0
1.0
0.0
+1.0
dB
AGC amplifier second
V
HDRS
T11A T21A
f = 4 MHz, V
IN
= 200 mVp-p
OPEN
0
0
45
40
dB
harmonic distortion
V
HDRE
T11A T21A
The (8 MHz component)/(4 MHz component)
OPEN
5.0
0
45
40
dB
output ratio
AGC amplifier maximum
V
OMRS
T11A T21A
f = 4 MHz, The output level for which
Adj.
0
0
20
22
mAp-p
output level
V
OMRE
T11A T26A
the second harmonic is 35 dB
Adj.
5.0
0
20
22
mAp-p
AGC amplifier muting
V
MRS
T11A T21A
f = 4 MHz, VI = 200 mVp-p
OPEN
0
5.0
45
40
dB
attenuation
V
MRE
T11A T26A
The output level/V
RSP
,
EP
ratio
OPEN
5.0
5.0
45
40
dB
Continued on the next page.
No. 5647-4/12
LA7415
Continued from the preceding page.
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
Input Output
T2
T4
T5
[Record Mode]
T15: 5.0 V, T2: OPEN,
REC
HA
SW30
T6: 5.0 V, T7: 5.0 V
Adj2
MUTE
AGC amplifier
T10A: f = 629 kHz, V
IN
= 360 mVp-p
relative cross
V
CYS
T10A T21A
T11A: f = 4 MHz, V
IN
= 200 mVp-p
OPEN
0
0
45
40
dB
modulation level
V
CYE
T11A T26A
(4 MHz 629 kHz)/(4 MHz)
OPEN
5.0
0
45
40
dB
output ratio
R
RON
17
P-17
OPEN
5.0
4.0
6.0
Record mode
R
RON
18
P-18
The difference in the DC
OPEN
0
4.0
6.0
mode switching
R
RON
21
P-21
measurement for 1-mA
OPEN
5.0
4.0
6.0
transistor on
R
RON
24
P-24
and 2-mA influx currents
OPEN
5.0
4.0
6.0
resistance
R
RON
26
P-26
OPEN
0
4.0
6.0
R
RON
29
P-29
OPEN
0
4.0
6.0
HA record
HAR-1
T4
SP
EP
*
1.8
5.0
V
threshold level
HAR-2
T4
EP
SP
*
0.0
1.4
V
Record MUTE
MUTE-1
T5
MUTE OFF
ON
*
3.4
5.0
V
threshold level
MUTE-2
T5
MUTE ON
OFF
*
0.0
3.0
V
Record/playback
SW REC/PB
T7: control voltage
2.2
5.0
V
threshold level
Notes 3. Measure with a DC voltage of about 1.8 V applied to the AGC detector filter pin (pin 12) and with the AGC amplifier gain fixed.
4. Adjust the output level by applying a DC voltage to T13 (REC CUR.Adj2)
5. Use a resistor with a 1.0% tolerance between pins 14 and 15.
Usage Notes
1. Control Pin Logic
RF SW, REC MUTE: pin 5
Playback mode
If the pin 5 DC voltage is < 1.0 V: Lch
If the pin 5 DC voltage is > 1.0 V: Hch
Record mode
If the pin 5 DC voltage is < 3.2 V: Muting will be off
If the pin 5 DC voltage is > 3.2 V: Muting will be on
Record/playback mode switching: pin 7
If the pin 7 DC voltage is < 2.0 V: Playback mode
If the pin 7 DC voltage is > 2.0 V: Record mode
H.Sync input: pin 6
If the pin 6 DC voltage is > 1.5 V: Currently the signal is in an
H.Sync period
*: Playback mode: Used for switching timing in SP search.
Record mode: Used as the record amplifier AGC synchronization block gate pulse.
(4) Playback trick mode switching: pin 2
If the pin 2 DC voltage is > 3.0 V: Trick 1
If the pin 2 DC voltage is < 1.0 V: Trick 2
If the pin 2 DC voltage is > 1.0 V and < 3.0 V: Normal
*: Normal mode: Two channels controlled (EP/SP) by pin 4: ON
Envelope comparator: OFF
In trick 1 and 2 modes: All 4 channels: ON
Envelope comparator: ON
*: The difference between trick 1 and trick 2 is that:
Trick1
SP search is performed in the [HA switch] path.
Trick2
SP search is performed in the [HA switch] path. (See the block diagram.)
HA SW (EP/SP mode switching): pin 4
If the pin 4 DC voltage is < 1.6 V: SP mode
If the pin 4 DC voltage is > 1.6 V: EP mode
*: H.Sync synchronization for HA switching:
The switching of the HA SW circuit show in the figure at the right
is synchronized with the H.Sync signal input to pin 6.
(Other EP/SP switching is performed in real time.)
Comp.OUT (pin 3)
If the EP envelope is > SP: High (4.0 V or higher)
If the EP envelope is < SP: Low (0.7 V or lower)
No. 5647-5/12
LA7415
Envelope comparator (pin 3) output
Servo (microcontroller)
or
Pin 4 HA
HA switch
Envelope comparator output
HA switch
2. Envelope Detector Characteristics: pin 8
The LA6529M includes an on-chip playback signal envelope detector circuit used to achieve automatic tracking
adjustment with essentially linear characteristics.
Envelope Detector Characteristics (design target values) f = 4 MHz
3. Record Amplifier Gain Control
The LA6529M achieves an adjustment-free record current by adding an AGC circuit in the record amplifier block. The
record current can be modified using the circuit shown below.
(1) REC Current.Adj2: When open
The pin 13 DC level is set to 1/2 V
CC
(about 2.5 V) by an internal bias and the record current is determined by RO1.
Design values: RO1: 1.5 k = 15.6 mAp-p (SP) (per channel)
= 12.3 mAp-p (EP)
(2) REC Current.Adj2: When used
The value determined by RO1 can be adjusted from 6.0 dB to +3.5 dB by applying a control DC level (1 to 4 V) to pin 13.
(Reference)
The circuit below can be used to apply the DC control level to pin 13.
This allows 9 modes (1 to 4 V) to be applied.
No. 5647-6/12
LA7415
SP + external 18 k resistor
Pin 10 playback amplifier output level (mVp-p)
Pin 8 + external 18 k resistor
Design values
Microcontroller
Pin No.
Pin
Standard DC voltage (V)
Pin circuit
Notes
PB
2.0
1
19
PB Amp
22
Second filter
28
REC
3.6
3.0 V
Trick1
1.0 V
NORMAL
2
TRICK-H
Trick2
High: 4.5 V or higher
PB
Low: 0.7 V or lower
3
COMP-OUT
EP > SP ENV: High
REC
OPEN
4
HA (EP/SP)
1.6 V
EP
SP
SW30 REC MUTE
Hch
ON 3.2 (V)
5
RF-SW
(REC-MUTE)
1.0 (V) Lch
OFF
Sync
6
H-SYNC
1.5 V
H
L
No. 5647-7/12
LA7415
Pin Functions
Continued on the next page.
No. 5647-8/12
LA7415
Pin No.
Pin
Standard DC voltage (V)
Pin circuit
Notes
PB
0
REC
7
REC-H
2.0 V
PB
REC
5
Described
PB
in a separate
document.
8
ENV DET OUT
REC
0
9
GND
PB-OUT
PB
2.3
10
REC-C-IN
REC
3.6
11
REC-Y-IN
REC
3.6
PB
1.6
12
AGC-FLT
REC
1.6
PB
2.5
4 V: +3.5 dB
2.5 V: 0 dB
13
REC-CURRENT ADJ2
(OPEN)
1 V: 6 dB
REC
2.5
Continued from the preceding page.
Continued on the next page.
No. 5647-9/12
LA7415
Pin No.
Pin
Standard DC voltage (V)
Pin circuit
Notes
PB
4.5
14
REC-CURRENT ADJ1
REC
5.0
15
V
CC
PB
2.5
16
REC-BIAS
REC
1.7
PB
0
17
REC-SP OUT
18
REC-EP OUT
REC
4.2
PB
0.7
20
SP-L-IN
23
SP-H-IN
27
EP-L-IN
30
EP-H-IN
REC
0
PB
0
21
SP-L-SW
24
SP-H-SW
26
EP-L-SW
29
EP-H-SW
REC
4.2
25
PRE-GND
Continued from the preceding page.
No. 5647-10/12
LA7415
Block Diagram
No. 5647-11/12
LA7415
Test Circuit
No. 5647-12/12
LA7415
This catalog provides information as of April, 1997. 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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