SANYO LA70001 Datasheet

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 ≤ 65°C [LA70001] 600 mW

Allowable power dissipation Pd max Ta ≤ 65°C [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 = 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 5.5 V

Operating Conditions at Ta = 25°C

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 VIN= 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 GVP1—GVP2 –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 µVrms

input signal.

Frequency characteristics CH1 ∆Vfp1 The ratio of the output for VIN= 38 mVp-p,

CH2 ∆V

fp

2 f = 7 MHz and GVP1, 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 Ω

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

105 112 119 mVp-p

∆V

AGC

1-SP

At f = 4 MHz, when VIN= 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 VIN= 100 mVp-p: the

–1.0 –0.5 dB

output level /VRSP, EP

Record AGC amplifier frequency

At VIN= 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 VIN= 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 VIN= 400 mVp-p and f = 4 MHz, the

–45 –40 dB

output level/VRSP, EP

Record AGC amplifier cross modulation

T9A: VIN= 400 mVp-p, f = 4 MHz

relative level

∆V

CYS

T10A: VIN= 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 = 25°C

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.