Datasheet LA70020, LA70020M Datasheet (SANYO)

Overview

The LA70020 and LA70020M are 6-head amplifiers
adding hi-fi recording/playback amplifiers to the
LA70011/LA70011M recording/playback amplifiers for
VHS VCR video signals. When used in combination with
the LA71000M and LA71500M Series of video signal
processing ICs, they permit Y/C recording without current
adjustment.

Features

• Combining hi-fi and video amplifiers onto a single chip
saves space on the circuit board.

• Connecting the playback amplifier input directly to the
head reduces the number of external elements required.

• The recording amplifiers use a fixed-current drive
configuration that yields stable recording characteristics
even under changing loads. They include built-in
automatic gain control circuits.

• The LA70020, encapsulated in DIP package, can be
mounted at the right end of the LA70001 and LA70011
sockets. The LA70020M lacks this flexibility because its
MFP package has a different pin pitch.

Package Dimensions

unit: mm

3170-DIP36S 400mil

unit: mm

3129-MFP36SD, MFP36SLF

Monolithic Linear IC

22798RM (OT) No. 5711-1/13

SANYO: DIP36S

[LA70020]

SANYO: MFP36SD
SANYO: MFP36SLF

[LA70020M]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Recording/Playback Amplifier for VHS VCRs

LA70020, 70020M

Ordering number : EN5711A

Parameter Symbol Conditions Ratings Unit

Maximum power supply voltage V

CC

max 6.0 V

Ta ≤ 65°C [LA70020] 1000 mW

Maximum power dissipation Pd max Ta ≤ 65°C [LA70020M]

1000 mW

114.3

× 76.1 × 1.6 mm: glass epoxy
Operating temperature Topr –10 to +65 °C
Storage temperature Tstg –40 to +150 °C

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Recommended supply voltage V

CC

5.0 V

Operating supply voltage range V

CC

op 4.8 to 5.3 V

Operating Conditions at Ta = 25°C

No. 5711-2/13

LA70020, 70020M

Parameter Symbol Conditions

Ratings

Unit

min typ max

Playback Mode

Current drain I

CCP

Current flowing into pin 13 44 53 60 mA

SP-L CH1 G

VP

1VIN= 38 mVp-p, f = 4 MHz 56 59 62 dB

Voltage gain

SP-H CH2 G

VP

2565962dB

EP-L CH3 G

VP

3565962dB

EP-H CH4 G

VP

4565962dB

Voltage gain difference

∆G

VP

1GVP1 — GVP2–10+1dB

∆G

VP

2GVP3 — GVP4–10+1dB

Intermode gain difference ∆G

VP

3GVP3 — GVP1–10+1dB

CH1 V

NIN1

Ratio of the output from a 1.1 MHz low pass

Converted input noise voltage

CH2 V

NIN2

filter to the output with no input under the

1.0 1.5 µVrms

CH3 V

NIN3

same conditions as those used for measuring

CH4 V

NIN4

voltage gain.

CH1 ∆V

fp

1 Ratios of the output for VIN= 38 mVp-p and

Frequency characteristic

CH2 ∆V

fp2

f = 7 MHz to the voltage gains GVP1, GVP2,

–2.5 0 dB

CH3 ∆V

fp3GVP

3, and GVP4.

CH4 ∆V

fp4

CH1 ∆V

HDP

1 Ratio of the 8 MHz (secondary) component of

Secondary harmonic distortion

CH2 ∆V

HDP2

the output to its 4 MHz (primary) component

–40 –35 dB

CH3 ∆V

HDP3

for VIN= 38 mVp-p and f = 4 MHz.

CH4 ∆V

HDP4

CH1 ∆V

OMP

1 Output level, for f = 1 MHz, at which the ratio

Maximum output level

CH2 ∆V

OMP2

of the 3 MHz (tertiary) component to the

1.0 1.2 Vp-p

CH3 ∆V

OMP3

1 MHz (primary) component is -30 dB.

CH4 ∆V

OMP4

VCR1

Ratio of the output for V

IN

= 38 mVp-p and

–40 –35 dB

Crosstalk SP

f = 4 MHz to G

VP

1.

V

CR

2

Ratio of the output for V

IN

= 38 mVp-p and

–40 –35 dB

f = 4 MHz to G

VP

2.

V

CR

3

Ratio of the output for V

IN

= 38 mVp-p and

–40 –35 dB

Crosstalk EP

f = 4 MHz to G

VP

3.

V

CR

4

Ratio of the output for V

IN

= 38 mVp-p and

–40 –35 dB

f = 4 MHz to G

VP

4.

∆V

ODC

1 CH1 — CH2

∆V

ODC

2 CH3 — CH4

Output DC offset

∆V

ODC

3 CH1 — CH3

–100 0 +100 mV

∆V

ODC

4 CH2 — CH4

∆V

ODC

5 CH1 — CH4

∆V

ODC

6 CH2 — CH3

Envelope detector output pin voltage V

ENV

T12 DC level with no signal input. 0 0.8 1.4 V

V

ENVSP

1

T12 DC level at which T13A output level is

2.0 2.5 3.0 V

Envelope detector output pin voltage SP

150 mVp-p for f = 4 MHz.

V

ENVSP

2

T12 DC level at which T13A output level is

4.0 4.5 5.0 V

400 mVp-p for f = 4 MHz.

V

ENVEP

1

T12 DC level at which T13A output level is

2.0 2.5 3.0 V

Envelope detector output pin voltage EP

125 mVp-p for f = 4 MHz.

V

ENVEP

2

T6 DC level at which T7A output level is

4.0 4.5 5.0 V

300 mVp-p for f = 4 MHz.

Comparator output voltage

V

COMP

1 T8 DC level for VIN= 38 mVp-p and f = 4 MHz. 0.4 0.7 V

V

COMP

2 T8 DC level for VIN= 38 mVp-p and f = 4 MHz. 4.5 4.8 V

SW-Tr on resistance during playback

R

PON

24

DC difference for 1 and 2 mA current inputs. 4 6 Ω

R

PON

29

TR1-1 Normal → Trick1 : *13.25.0V

Trick threshold level

TR1-2 Trick1 → Normal 1.2 2.8 V
TR2-1 Normal → Trick2 : *10.00.8V
TR2-2 Trick2 → Normal 1.2 2.8 V

Electrical Characteristics at Ta = 25°C (Video Circuits)

Continued on next page.

No. 5711-3/13

LA70020, 70020M

Parameter Symbol Conditions

Ratings

Unit

min typ max

HA playback threshold level

HAP-1 SP →EP : *11.75.0V
HAP-2 EPSP 0.0 1.3 V

SW30 threshold level

SW30-1 Lch → Hch : *11.25.0V
SW30-2 Hch → Lch 0.0 0.8 V

Recording Mode

Current drain I

CCR

Current input at pin 13. 52 59 66 mA

V

RSP

Output level for VIN= 400 mVp-p and

127 135 143 mVp-p

REC AGC AMP output level

f = 4 MHz.

V

REP

104 111 119 mVp-p

Intermode gain difference ∆GVR VRSP/VREP 1.4 1.7 2.0 dB

∆V

AGC

1-SP

Output level divided by V

RSP

or V

REP

for

0.5 1.0 dB

REC AGC AMP control characteristic

∆V

AGC

1-EP

f = 4 MHz and VIN= 700 mVp-p.

∆V

AGC

2-SP

Output level divided by V

RSP

or V

REP

for

–1.0 –0.5 dB

∆V

AGC

2-EP

f = 4 MHz and VIN= 100 mVp-p.

REC AGC AMP frequency characteristic

∆V

FRS

Ratio of f = 7 MHz output to f = 1 MHz output

–1 0 +1 dB

∆V

FRE

for VIN= 400 mVp-p. *2

∆V

HDRS

Ratio of the 8 MHz (secondary) component of

REC AGC AMP secondary primary distortion ∆V

HDRE

the output to its 4-MHz (primary) component –45 –40 dB
for V

IN

= 400 mVp-p and f = 4 MHz.

REC AGC AMP maximum output level

∆V

MOSP

Output level, for f = 4 MHz, at which the

20 22 mApp

∆V

MOEP

secondary distortion is –35 dB.

REC AGC AMP muting attenuation

∆V

MRS

Output level divided by V

RSP

or V

REP

for

–45 –40 dB

∆V

MRE

f = 4 MHz and VIN= 400 mVp-p.

∆V

CYS

Output ratio (4M +/ 629k)/4M for

REC AGC AMP cross modulation relative level

∆V

CYE

VIN= 400 mVp-p and f = 4 MHz at T9A and –45 –40 dB
V

IN

= 2.4 Vp-p and f = 629 kHz at T10A.

HA REC threshold level

H

AR

-1 SP → EP : *11.75.0V

H

AR

-2 EP → SP 0.0 1.3 V

REC MUTE threshold level

MUTE-1 MUTE OFF → MUTE ON *11.22.8V
MUTE-2 MUTE ON → MUTE OFF 3.2 5.0 V

REC PB threshold level

PB-REC PB → REC *11.25.0V
REC-PB REC → PB 0.0 0.8 V

Continued from preceding page.

Notes:* Before measuring the items under Playback Mode, input a 0 to 5.0 V trigger pulse to T11 (H-SYNC), the pin from which the LA70020 takes its T9

(HA) control switch timing.

* The resistance between pins 19 and 20 must be accurate to within 1.0%.
*1. These are voltage application points.
*2. Apply a DC voltage of approximately 1.8 V to the AGC wave detector filter pin (pin 21) to fix the AGC amplifier gain.
*3. Apply a DC voltage to the REC-CUR-Adj pin (pin 18) and adjust the output level.

No. 5711-4/13

LA70020, 70020M

Parameter Symbol Conditions

Ratings

Unit

min typ max

Playback Mode

Current drain HI

CCP

Current flowing into pin 36 20 25 30 mA

Voltage gain

CH1 HG

VP

1VIN= 20 mVp-p, f = 1.5 MHz 72.5 75.5 78.5 dB

CH2 HG

VP

2 72.5 75.5 78.5 dB

Voltage gain difference ∆HG

VP

HGVP1 — HGVP2–20+2dB

Intermode gain difference ∆HGEP

Voltage gain difference between SP and EP

1.7 2.4 3.1 dB

modes. *1
Ratio of the output from a 1.1-MHz low pass

Converted input noise voltage

CH1 HV

NIN1

filter to the output with no input under the

0.8 1.2 µVrms

CH2 HV

NIN2

same conditions as those used for measuring
voltage gain.

Frequency characteristic

CH1 ∆HV

fp1

Ratios of the output for VIN= 20 mVp-p and f =

–3 –1 dB

CH2 ∆HV

fp2

2 MHz to the voltage gains HGVP1 and HGVP2.

CH1 ∆HV

HDP

1 Ratio of the 3-MHz (secondary) component of

Secondary harmonic distortion CH2 ∆HV

HDP2

the output to its 1.5-MHz (primary) component –50 –40 dB
for V

IN

= 20 mVp-p and f = 1.5 MHz.

CH1 ∆HV

OMP

1 Output level, for f = 1.5 MHz, at which the

Maximum output level CH2 ∆HV

OMP2

ratio of the 4.5 MHz (secondary) component 2 Vp-p
to the 1.5 MHz (primary) component is –30 dB.

V

HCR

1

Ratio of the output for V

IN

= 20 mVp-p and

–40 –35 dB

Crosstalk SP

f = 1.5 MHz to HG

VP

1.

V

HCR

2

Ratio of the output for V

IN

= 20 mVp-p and

–40 –35 dB

f = 1.5 MHz to HG

VP

2.

V

HCR

3

Ratio of the output for V

IN

= 20 mVp-p and

–40 –35 dB

Crosstalk EP

f = 1.5 MHz to HG

VP

1.

V

HCR

4

Ratio of the output for V

IN

= 20 mVp-p and

–40 –35 dB

f = 1.5 MHz to HG

VP

2.

Output DC offset SP mode ∆V

ODC

1 CH1 — CH2 –30 0 +30 mV

Output DC offset EP mode ∆V

ODC

2 CH1 — CH2 –50 0 +50 mV

HA threshold level

H

HAP-1

SP → EP : *11.75.0V

H

HAP-2

EP → SP 0.0 1.3 V

SW30 threshold level

H

SW30-1

Lch → Hch : *11.25.0V

H

SW30-2

Hch → Lch 0.0 0.8 V

SW-Tr on resistance during playback H

RPON

DC difference for 1 and 2 mA current inputs. 4 6 Ω

Recording Mode

Current drain H

ICCR

Current input at pin 36. 55 65 75 mA

REC AGC AMP output level H

VOR

Output level for VIN= 180 mVp-p and

270 280 290 mVp-p

f = 1.5 MHz.

∆HV

AGC1

Output level divided by HVORfor f = 1.5 MHz

0.2 0.5 dB

REC AGC AMP control characteristic

and V

IN

= 360 mVp-p.

∆V

AGC2

Output level divided by HVORfor f = 1.5 MHz

–0.5 –0.2 dB

and V

IN

= 90 mVp-p.

REC AGC AMP muting attenuation ∆HV

MR

Output level divided by HVORfor f = 4 MHz

–40 dB

and V

IN

= 180 mVp-p.

REC AGC AMP cross modulation relative

HCMD04

0.4-MHz component for T3A V

IN

= 90 mVp-p,

–40 dB

level for 0.4-MHz component f = 1.3 MHz + V

IN

= 270 mVp-p, f = 1.7 MHz.

REC AGC AMP cross modulation relative

HCMD09

0.9-MHz component for T3A V

IN

= 90 mVp-p,

–40 dB

level for 0.9-MHz component f = 1.3 MHz + V

IN

= 270 mVp-p, f = 1.7 MHz.

REC MUTE threshold level

H

MUTE1

MUTE OFF → MUTE ON *11.22.8V

H

MUTE2

MUTE ON → MUTE OFF 3.2 5.0 V

REC PB threshold level

PB-REC PB → REC *11.25.0V
REC-PB REC → PB 0.0 0.8 V

Electrical Characteristics at Ta = 25°C (Hi-Fi Circuits)

Note : These are voltage application points.

No. 5711-5/13

LA70020, 70020M

Pin Descriptions

Pin Number Pin Name Standard DC Voltage (V) Equivalent Circuit Notes

1

HiFi

PB-FM-OUT

PB

REC

2.6

4.0

3.2 V

SW30 MUTE

1.0

ON

Hch

OFF

Lch

2

31

HiFi

GND

3

HiFi

REC-FM-IN

PB

REC

0

3.0

4

HiFi

REC-AGC-Filt

PB

REC

0

1.2

5

HiFi

REC-CURRENT-

ADJ

PB

REC

0.7

1.5

6

HiFi

RF-SW

(REC-MUTE)

Continued on next page.

No. 5711-6/13

LA70020, 70020M

Continued from preceding page.

Pin Number Pin Name Standard DC Voltage (V) Equivalent Circuit Notes

7 TRICK-H

8 COMP-OUT EP > SP ENV High

PB

H: min. 4.5 V
L: max. 0.7 V

REC Open

9 HA (EP/SP)

3.0 V

1.0 V

Trick1

NORMAL

Trick2

1.0 V

EP

SP

10 SW30

1.0 V

Hch

Lch

11 H-SYNC

1.5 V

SYNC

H

L

Continued on next page.

No. 5711-7/13

LA70020, 70020M

Continued from preceding page.

Pin Number Pin Name Standard DC Voltage (V) Equivalent Circuit Notes

12 ENVDET-OUT

13 PB-OUT

14
26

GND

15 REC-Y-IN

PB

REC

See relevant
documents.

0

PB

REC

1.7

0

PB

REC

0

3.7

16 REC-C-IN

17 REC/MUTE/PB

PB

REC

0

3.7

3.0 V

1.0 V

REC

REC

MUTE

PB

Continued on next page.

No. 5711-8/13

LA70020, 70020M

Continued from preceding page.

Pin Number Pin Name Standard DC Voltage (V) Equivalent Circuit Notes

18

REC-CURRENT-

ADJ2

19

V

CC

PB

REC

2.5 V

2.5 V

20

REC-CURRENT-

ADJ1

PB

REC

5.0

4.5

21

22
25
27
30

23
28

REC-AGC-FILT

SP L-IN

SP H-IN

EP L-IN

EP H-IN

REC SP OUT

EP OUT

PB

PB

PB

REC

REC

REC

0

2.1

2.1

1.6

4.1

4.1

Continued on next page.

No. 5711-9/13

LA70020, 70020M

Continued from preceding page.

Pin Number Pin Name Standard DC Voltage (V) Equivalent Circuit Notes

24
29
34

PB FILT

PB

REC

0

2.5

32
35

HiFi
PB-Lch-IN
PB-Hch-IN

PB

REC

2.1

4.1

33

HiFi
REC-OUT

PB

36

HiFi

V

CC

5.0

REC

2.1

4.1

Usage Notes
Control Pin Logic

HiFi RF-SW, REC-MUTE : Pin 6

During playback
Pin 6 level - DC < 1.0 V: Lch
Pin 6 level - DC > 1.0 V: Hch

During recording
Pin 6 level - DC < 3.0 V: Mute off
Pin 6 level - DC > 3.0 V: Mute on

Switching Video Trick Mode with Pin 7

GND < pin 7 level - DC < 1.0 V: TRICK2

1.0 V < pin 7 level - DC < 3.0 V: NORMAL

3.0 V < pin 7 level - DC < 5.0 V: TRICK2

NORMAL Mode
Two channels selected with pin 9 (EP/SP): ON
Envelope comparator: OFF

TRICK Modes
All four channels: ON
Envelope comparator: OFF

Difference between TRICK1 and TRICK2 modes
TRICK1 is a special playback mode using the following path

Envelope comparator OUT (pin 8) → Servo (microcontroller) → Pin 3 (HA) → HA-SW

TRICK2 provides SP searching

Envelope comparator OUT → HA-SW

HA-SW (EP/SP mode switch): Pin 9

GND < pin 9 level - DC < 1.5 V: SP mode

1.5 V < pin 9 level - DC < 5 V: EP mode

Video Synchronization of HA Switching Timing during Playback with H-SYNC Signal
During playback, the LA70020’s video circuits synchronize the HA-SW switching timing shown in the following figure
with the H-SYNC signal from pin 11. (Other EP/SP switching takes place in real time.)

The hi-fi playback amplifier’s gain is approximately 2.4 dB higher in EP mode than in SP mode.

SP: 75.0 dB
EP: 77.4 dB

No. 5711-10/13

LA70020, 70020M

Comparator Output: Pin 8

EP envelope > SP envelope: High (min. 4.0 V)
EP envelope < SP envelope: Low (max. 0.7 V)

H-SYNC Input: Pin 11

Pin 11 level - DC > 1.5 V: H-SYNC interval

Video circuit operation only
Playback:
— Determines timing of HA switching (EP/SP)
— Determines timing of special playback

Recording:
— Serves as gate pulse for REC-AGC-AMP SYNC unit

REC/REC-MUTE/PB Switching: Pin 17

Envelope Detector Characteristic: Pin 12
The LA70020 includes a built-in playback signal envelope detector circuit for use in automating tracking adjustment.

No. 5711-11/13

LA70020, 70020M

SP, with 18-k<OMEGA_UC> resistor on pin 12

Pin 12 level - detector
DC level (V)

Pin 12 level - playback output level (mVp-p)

Envelope detector voltage characteristic

EP, with 18-k<OMEGA_UC> resistor on pin 12

Video REC AMP Gain Control
The LA70020 eliminates recording current adjustment by adding an automatic gain control circuit to the recording
amplifier. It is also possible to change the recording current with the following methods.

REC-CURRENT-ADJ2 Open
The internal bias forces the DC level at pin 18 to 1/2 VCC(that is, approximately 2.5 V), and RO1 determines the
recording current.
Design values
RO1 = 1.5 kΩ = 16.0 mA (SP) (per channel)
RO1 = 1.5 kΩ = 12.7 mA (EP)

REC-CURRENT-ADJ2 Used
Applying a DC control voltage between 1 and 4 V to pin 18 adjusts the figure determined by RO1 between –6.0 dB and
+3.5 dB.

Note: One possible circuit for applying this voltage is the following, which provides 9 modes between 1 and 4 V.

Hi-Fi REC AMP Gain Control
The LA70020 eliminates recording current adjustment by adding an automatic gain control circuit to the recording
amplifier. It is also possible to change the recording current with the following methods.

REC-CURRENT-ADJ
RO1 determines the recording current.
Design values
RO1 = 1.0 kΩ = 24.0 mA (SP) (per channel)
RO1 = 1.5 kΩ = 16.0 mA (EP)

No. 5711-12/13

LA70020, 70020M

[01] REC-CURRENT (mAp-p)

design values

PS No. 5711-13/13

LA70020, 70020M

Block Diagram

This catalog provides information as of February, 1998. Specifications and information herein are subject to
change without notice.

■ 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.