Datasheet LA7415 Datasheet (SANYO)

Monolithic Linear IC

No. 5647

VHS VCR Playback Head and Record Amplifiers

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.

LA7415

Package Dimension

unit: mm

3061-DIP30S

[LA7415]

SANYO: DIP30S

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage 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

Operating Conditions at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Supply voltage V
Operating voltage range V

max 7.0 V

CC

CC

op 4.8 to 5.5 V

CC

5.0 V

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

43097HA(OA) No. 5647-1/12

LA7415

Electrical Characteristics at Ta = 25°C

Ratings

Parameter Symbol Conditions

Input Output T2 T4 T5

[Playback Mode]

Current drain I

SP L CH1 VG

Voltage gain

SP H CH2 VG
EP L CH3 VG

EP H CH4 VG
Voltage gain differential 1 ∆VG
Voltage gain differential 2 ∆VG
Inter-mode gain difference ∆

Equivalent input CH2 V
noise voltage CH3 V

CH1 V

CH4 V

CCP

1 T20A T10A OPEN 0 0 54.0 57.0 60.0 dB

P

2 T23A T10A

P

3 T27A T10A

P

4 T30A T10A OPEN 5.0 2.5 56.0 59.0 62.0 dB

P

1– –VGP1 – VGP2––––10+1dB

P

2– –VGP3 – VGP4––––10+1dB

P

VG

NIN
NIN
NIN
NIN

––VGP3 – VGP1–––123dB

P EP-SP

1 T20A T10A
2 T23A T10A
3 T27A T10A
4 T30A T10A OPEN 5.0 2.5 – 1.1 1.5 µVrms

CH1 ∆Vfp1 T20A T10A
Frequency CH2 ∆Vfp2 T23A T10A
characteristics CH3 ∆Vfp3 T27A T10A

CH4 ∆Vfp4 T30A T10A

CH1 V
Second harmonic CH2 V
distortion CH3 V

CH4 V

CH1 V
Maximum CH2 V
output level CH3 V

CH4 V

1 T20A T10A

HDP

2 T23A T10A

HDP

3 T27A T10A

HDP

4 T30A T10A

HDP

1 T20A T10A

OMP

2 T23A T10A

OMP

3 T27A T10A

OMP

4 T30A T10A OPEN 5.0 2.5 1.0 1.2 – Vp-p

OMP

T15: 5.0 V, T13: OPEN, TRCK HA SW30
T7: OPEN MUTE

Pin 15 influx current OPEN 0 0 24 30 36 mA

= 38 mVp-p,

V

IN

f = 1 MHz

After the 1.1-MHz LPF
V

OUT

VG

1, 2, 3, 4

P

V

= 38 mVp-p

IN

f = 7 MHz

V

OUT

1, 2, 3, 4 output ratio

VG

P

V

= 38 mVp-p

IN

f = 4 MHz
(8-MHz component)/(4-MHz component)

output ratio

f = 1 MHz
The output level when the third
harmonic in the output is –30 dB

OPEN 0 2.5 54.0 57.0 60.0 dB
OPEN 5.0 0 56.0 59.0 62.0 dB

OPEN 0 0 – 1.1 1.5 µVrms
OPEN 0 2.5 – 1.1 1.5 µVrms
OPEN 5.0 0 – 1.1 1.5 µVrms

OPEN 0 0 –2.5 0 – dB
OPEN 0 2.5 –2.5 0 – dB
OPEN 5.0 0 –2.5 0 – dB
OPEN 5.0 2.5 –2.5 0 – dB
OPEN 0 0 – –40 –35 dB
OPEN 0 2.5 – –40 –35 dB
OPEN 5.0 0 – –40 –35 dB
OPEN 5.0 2.5 – –40 –35 dB
OPEN 0 0 1.0 1.2 – Vp-p
OPEN 0 2.5 1.0 1.2 – Vp-p
OPEN 5.0 0 1.0 1.2 – Vp-p

T23A T10A OPEN 0 0 – –40 –35 dB

CH1 V
Crosstalk SP T30A T10A
(Note 1) T20A T10A

CH2 V

1 T27A T10A

CR

2 T27A T10A

CR

V

= 38 mVp-p,

IN

f = 4 MHz

V

OUT

1, 2

VG

P

OPEN 0 0 – –40 –35 dB
OPEN 0 0 – –40 –35 dB
OPEN 0 2.5 – –40 –35 dB

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
Crosstalk EP T30A T10A
(Note 1) T20A T10A

CH4 V

3 T27A T10A

CR

4 T27A T10A

CR

V

= 38 mVp-p,

I

f = 4 MHz

V

OUT

3, 4

VG

P

OPEN 5.0 0 – –40 –35 dB
OPEN 5.0 0 – –40 –35 dB
OPEN 5.0 2.5 – –40 –35 dB
OPEN 5.0 2.5 – –40 –35 dB

T30A T10A OPEN 5.0 2.5 – –40 –35 dB

∆V

1 – T10 CH1-CH2

ODC

∆V

2 – T10 CH3-CH4

ODC

∆V

3 – T10 CH1-CH3

Output DC OPEN 5.0 0 –100 0 +100 mV
offset

ODC

∆V

4 – T10 CH2-CH4

ODC

∆V

5 – T10 CH1-CH4

ODC

∆V

6 – T10 CH2-CH3

ODC

OPEN – 0 –100 0 +100 mV
OPEN 0 2.5 –100 0 +100 mV
OPEN – 0 –100 0 +100 mV
OPEN 5.0 2.5 –100 0 +100 mV
OPEN 0 – –100 0 +100 mV

OPEN 0 – –100 0 +100 mV
OPEN 5.0 2.5 –100 0 +100 mV
OPEN 0 0 –100 0 +100 mV
OPEN 5.0 2.5 –100 0 +100 mV
OPEN 0 2.5 –100 0 +100 mV
OPEN 5.0 0 –100 0 +100 mV

Note 1. With the input inductor L (8.2 µH) shorted.

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.

2.

min typ max

Continued on the next page.

Unit

No. 5647-2/12

LA7415

Continued from the preceding page.

Parameter Symbol Conditions

Input Output T2 T4 T5

T15: 5.0 V, T13: OPEN, TRCK HA SW30
T7: OPEN MUTE

Enveloped detector
output pin voltage

Enveloped detector
voltage SP1 T10A: Adjusted to 300 mV p-p

Enveloped detector
voltage SP2 T10A: Adjusted to 600 mV p-p

Enveloped detector
voltage EP1 T10A: Adjusted to 200 mV p-p

Enveloped detector
voltage EP2 T10A: Adjusted to 450 mV p-p

Comparator
output voltage 1 The T3 DC voltage

Comparator
output voltage 2 The T3 DC voltage

Playback mode on switching
transistor on resistance

Playback mode
mode switching

transistor on
resistance

Trick 1 threshold
level

Trick 2 threshold
level

HAPB threshold
level

SW30 threshold
level

[Record Mode]

Current drain I
AGC amplifier

output level
Inter-mode gain

difference
AGC amplifier control

characteristics 1
AGC amplifier control

characteristics 2
AGC amplifier frequency

characteristics

AGC amplifier second
harmonic distortion

AGC amplifier maximum
output level

AGC amplifier muting
attenuation

V

ENV

V

ENVSP1

V

ENVSP2

V

ENVEP1

V

ENVEP2

V

COMP1

V

COMP2

R

17 P-17

PON

18 P-18

R

PON

21 P-21 OPEN 5.0 – – 4.0 6.0 Ω

R

PON

R

24 P-24

PON

26 P-26

R

PON

29 P-29 OPEN 0 – – 4.0 6.0 Ω

R

PON

T8 The T8 DC voltage with no input OPEN 0 0 0 0.4 0.8 V

T20A T8

T20A T8

T27A T8

T27A T8

T20A T3

T20A T3

f = 4 MHz

f = 4 MHz

f = 4 MHz

f = 4 MHz

f = 4 MHz, V

f = 4 MHz, V

= 38 mVp-p

IN

= 38 mVp-p

IN

The difference in the DC measurement
for 1-mA and 2-mA influx currents

The difference in the DC measurement
for 1-mA and 2-mA influx currents

TR1-1 T2 Normal → Trick1 * – – 3.2 – 5.0 V
TR1-2 T2 Trick1 → Normal * – – 1.2 – 2.8 V
TR2-1 T2 Normal → Trick2 * – – 0.0 – 0.8 V
TR2-2 T2 Trick2 → Normal * – – 1.2 – 2.8 V
HAP-1 T4 SP → EP – * – 1.8 – 5.0 V

HAP-2 T4 EP → SP – * – 0.0 – 1.4 V
SW30-1 T5 Lch → Hch – – * 1.2 – 5.0 V
SW30-2 T4 Hch → Lch – – * 0.0 – 0.8 V

T15: 5.0 V, T2: OPEN, REC HA SW30
T6: 5.0 V, T7: 5.0 V Adj2 MUTE

The pin 15 influx current OPEN 0 0 44 55 66 mA
f = 4 MHz

V

= 200 mVp-p

IN

RSP/VREP

f = 4 MHz, V
The output level/V

f = 4 MHz, V
The output level/V

f = 1 MHz, 7 MHz, VIN= 100 mVp-p
The 7 MHz/1 MHz output ratio

f = 4 MHz, V

= 400 mVp-p

IN

RSP, EP

= 100 mVp-p

IN

RSP, EP

= 200 mVp-p

IN

The (8 MHz component)/(4 MHz component)
output ratio

f = 4 MHz, The output level for which
the second harmonic is –35 dB

f = 4 MHz, VI = 200 mVp-p
The output level/V

RSP, EP

∆
∆
∆
∆

∆V
∆V

∆V
∆V

V
V

∆VG

V

AGC

V

AGC

V

AGC

V

AGC

∆V

∆V

∆V
∆V

CCR

RSP
REP

FRS
FRE

HDRS

HDRE

OMRS
OMRE

MRS
MRE

T11A T21A
T11A T26A

––V

R

1-SP

T11A T21A

1-EP

T11A T26A

2-SP

T11A T21A

2-EP

T11A T26A
T11A T21A
T11A T26A

T11A T21A
T11A T21A
T11A T21A

T11A T26A
T11A T21A
T11A T26A

ratio

ratio

ratio

Ratings

min typ max

Unit

OPEN 0 0 2.1 2.6 3.1 V

OPEN 0 0 4.5 4.8 5.0 V

OPEN 5.0 0 2.0 2.6 3.0 V

OPEN 5.0 0 4.5 4.8 5.0 V

5.0 0 0 – 0.4 0.7 V

5.0 5.0 0 4.5 4.8 – V

– – – – 4.0 6.0 Ω
– – – – 4.0 6.0 Ω

OPEN 5.0 – – 4.0 6.0 Ω
OPEN 0 – – 4.0 6.0 Ω

T2 T4 T5

OPEN 0 0 147 156 165 mVp-p
OPEN 5.0 0 116 123 130 mVp-p

– – – 1.30 2.05 2.80 dB

OPEN 0 0 – 0.5 1.0 dB
OPEN 5.0 0 – 0.5 1.0 dB
OPEN 0 0 –1.0 –0.5 – dB
OPEN 5.0 0 –1.0 –0.5 – dB
OPEN 0 0 –1.0 –0.0 +1.0 dB
OPEN 5.0 0 –1.0 –0.0 +1.0 dB

OPEN 0 0 – –45 –40 dB
OPEN 5.0 0 – –45 –40 dB

Adj. 0 0 20 22 – mAp-p

Adj. 5.0 0 20 22 – mAp-p
OPEN 0 5.0 – –45 –40 dB
OPEN 5.0 5.0 – –45 –40 dB

Continued on the next page.

No. 5647-3/12

Continued from the preceding page.

Parameter Symbol Conditions

[Record Mode]

LA7415

Input Output T2 T4 T5

T15: 5.0 V, T2: OPEN, REC HA SW30
T6: 5.0 V, T7: 5.0 V Adj2 MUTE

Ratings

min typ max

Unit

AGC amplifier
relative cross
modulation level

Record mode
mode switching
transistor on
resistance

HA record
threshold level

Record MUTE
threshold level

Record/playback
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.

∆V

∆V

R
R
R
R
R
R

HAR-1 T4 SP → EP – *–1.8 – 5.0 V

HAR-2 T4 EP → SP – *–0.0 – 1.4 V
MUTE-1 T5 MUTE OFF → ON – – * 3.4 – 5.0 V
MUTE-2 T5 MUTE ON → OFF – – * 0.0 – 3.0 V

SW REC/PB

T10A T21A

CYS

T11A T26A

CYE

17 P-17 OPEN 5.0 – – 4.0 6.0 Ω

RON

18 P-18

RON

21 P-21

RON

24 P-24

RON

26 P-26 OPEN 0 – – 4.0 6.0 Ω

RON

29 P-29 OPEN 0 – – 4.0 6.0 Ω

RON

T10A: f = 629 kHz, VIN= 360 mVp-p
T11A: f = 4 MHz, VIN= 200 mVp-p
(4 MHz ±629 kHz)/(4 MHz)
output ratio

The difference in the DC
measurement for 1-mA
and 2-mA influx currents

T7: control voltage – – – 2.2 – 5.0 V

OPEN 0 0 – –45 –40 dB

OPEN 5.0 0 – –45 –40 dB

OPEN 0 – – 4.0 6.0 Ω
OPEN 5.0 – – 4.0 6.0 Ω
OPEN 5.0 – – 4.0 6.0 Ω

Usage Notes

1. Control Pin Logic

RF SW, REC MUTE: pin 5

Record/playback mode switching: pin 7

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

If the pin 7 DC voltage is < 2.0 V: Playback mode
If the pin 7 DC voltage is > 2.0 V: Record mode

No. 5647-4/12

LA7415

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 →

Trick2 → SP search is performed in the [HA switch] path. (See the block diagram.)

Envelope comparator (pin 3) output

→→SP search is performed in the [HA switch] path.

Pin 4 HA HA switch

Servo (microcontroller)

Envelope comparator output

or

HA switch

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

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

Pin 8 + external 18 kΩ resistor

SP + external 18 kΩ resistor

Pin 10 playback amplifier output level (mVp-p)

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 VCC(about 2.5 V) by an internal bias and the record current is determined by RO1.

Design values: RO1: 1.5 kΩ = 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.

Microcontroller

Design values

No. 5647-6/12

LA7415

Pin Functions

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

2 TRICK-H

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)

1.0 V

1.6 V

Trick1

NORMAL

Trick2

EP

SP

5 RF-SW

(REC-MUTE) 1.0 (V) Lch

6 H-SYNC

SW30 REC MUTE

Hch

Sync

1.5 V

H

L

Continued on the next page.

ON 3.2 (V)

OFF

No. 5647-7/12

LA7415

Continued from the preceding page.

Pin No. Pin Standard DC voltage (V) Pin circuit Notes

PB 0

7 REC-H

8 ENV DET OUT

9 GND

PB-OUT PB 2.3

10

REC-C-IN REC 3.6

REC 5

Described

PB in a separate

document.

REC 0

2.0 V

REC

PB

11 REC-Y-IN REC 3.6

PB 1.6

12 AGC-FLT

REC 1.6

PB 2.5

13 REC-CURRENT ADJ2

REC 2.5

4 V: +3.5 dB

2.5 V: ±0 dB
(OPEN)
1 V: –6 dB

Continued on the next page.

No. 5647-8/12

LA7415

Continued from the preceding page.

Pin No. Pin Standard DC voltage (V) Pin circuit Notes

PB 4.5

14 REC-CURRENT ADJ1

REC 5.0

15 V

16 REC-BIAS

17 REC-SP OUT
18 REC-EP OUT

20 SP-L-IN
23 SP-H-IN
27 EP-L-IN
30 EP-H-IN

CC

PB 2.5

REC 1.7

PB 0

REC 4.2

PB 0.7

REC 0

21 SP-L-SW
24 SP-H-SW
26 EP-L-SW
29 EP-H-SW

25 PRE-GND

PB 0

REC 4.2

No. 5647-9/12

Block Diagram

LA7415

No. 5647-10/12

Test Circuit

LA7415

No. 5647-11/12

LA7415

■ 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 April, 1997. Specifications and information herein are subject to change
without notice.

No. 5647-12/12