Sanyo LA7286 Specifications

Ordering number: EN 4750

Monolithic Linear IC

LA7286

VCR Audio Signal Recording

and Playback Processor

Functions

.

Equalizer amplifier

.

Line amplifier

.

Recording amplifier

.

Recording bias current automatic adjustment circuit

.

Ripple filter

.

Mute

.

ALC

.

Recording/playback switch

.

SP, LP, EP switch

.

Tape head switch

Features

.

No adjustment of recording bias current required
(due to adoption of automatic adjustment circuit).

.

Recording bias oscillation circuit power supply switch on
chip.

.

Eliminates need for choke coil for recording equalizer.

.

Playback amplifier equivalent input noise voltage:

1.0 µVrms.

Package Dimensions

unit : mm

3067-DIP24S

0.48

21.2

[LA7286]

0.95

13

6.4

7.62

12

3.25

3.9max

3.3

0.51min

SANYO : DIP24S

24

1

0.81 1.78

.

Reduced capacitance (3.3 µF) of ALC detection capacitor.

.

High withstand voltage head switch on chip.

.

Supply voltage: 9 V and 12 V operation.

Specifications

Maximum Ratings atTa=25°C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Pin 2 input voltages V
Pin 2 input current I
Allowable power dissipation Pdmax Ta % 65°C 500 mW
Operating temperature Topr –10 to +65
Storage temperature Tstg –55 to +150

max 14 V

CC

2 DC ±65 Vp-p

IN

2 ±1.5 mA

IN

0.25

C

°

C

°

Operating Conditions atTa=25°C

Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Operating supply voltage range V

Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.

SANYO Electric Co.,Ltd. Semiconductor Company

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

CC

op 8.5 to 12.5 V

CC

9, 12 V

51595TH (II) No.4750-1/10

LA7286

Operating Characteristics atTa=25°C, VCC=12V,f=1kHz, 0 dBV : 1.0 Vrms

Parameter Symbol Conditions min typ max Unit
Current consumption (EE) I
Current consumption (PB) I
Current consumption (REC) I
[Equalizer amplifier]
Open-circuit voltage gain VG
Equivalent input noise voltage V
[Line amplifier]
Voltage gain (PB input) VG
Voltage gain (LINE input) VG
Total harmonic distortion THD
Output noise voltage V
Maximum output voltage V
Output voltage when ALC is on V
ALC effect ALC V
Distortion when ALC is on THD
[Recording amplifier ]
Voltage gain VG
Total harmonic distortion THD
Maximum output voltage V
[Mute circuit]
On voltage V
Off voltage V
Mute attenuation (PB, EE) M
[EP, LP, SP switch circuit]
EP mode hold voltage V
LP mode hold voltage V
SP mode hold voltage V
[EE, PB switch circuit]
EE mode hold voltage V
PB mode hold voltage V
[REC, EE switch circuit]
REC mode hold voltage V
EE mode hold voltage V
[Switch]
Pin 2 on resistance R
Pin 2 input voltage V
[Recording bias current automatic adjustment circuit]
Recording bias current I
Pin 1 output control range V

CCE
CCP
CCR

NIE

NOL
OML

OA

OMR

MON
MOFF
P,ME

EE

EL

ES

LL
LP

RR
RE

ON

IN

B

CTL

No signal 9.5 12.0 14.5 mA
No signal 8.5 11.0 13.5 mA
No signal 8.5 10.5 12.5 mA

VO= –6 dBV 58.4 64.4 dB

OE

Rg = 620 Ω, DIN Audio filter 1.0 1.8 µVrms

VO= –6 dBV 21.0 21.5 22.0 dB

LP

VO= –6 dBV 21.0 21.5 22.0 dB

LR

VO= –6 dBV 0.05 0.3 %

L

Rg=1kΩ, DIN Audio filter –80.0 –74.0 dBV
THD = 1% 1.7 2.5 Vrms
VIN= –26 dBV –7.0 –6.0 –5.0 dBV

= –26 dBV to –6 dBV 1 3 dB

IN

VIN= –26 dBV 0.05 0.6 %

A

VO= –6 dBV 13.5 14.0 14.5 dB

CR

VO= –6 dBV 0.05 0.3 %

R

THD = 1% 1.7 2.5 Vrms

Pin 22 DC voltage 2.5 6.0 V
Pin 22 DC voltage 0 1.5 V

80 90 dB

Pin 21 DC voltage 3.6 6.0 V
Pin 21 DC voltage 1.8 2.6 V
Pin 21 DC voltage 0 1 V

Pin 23 DC voltage 3 6 V
Pin 23 DC voltage 0 1 V

Pin 24 DC voltage 3 6 V
Pin 24 DC voltage 0 1 V

2 I2=±1mA 10 25 Ω

2 Ta=65°C,f=80kHz(sin), ILK=10µA ±45 V

The conditions for using each head assume the
specifications shown below.

220 245 270 µA

2.5 4.0 6.0 V

Head Coil Specifications

(1) Application circuit 1 (erase head series type)

.

R/P Head 58 kΩ (typ) +15% (f = 70kHz)

.

AE Head 34 Ω (typ) +25% (f = 70kHz)

.

FE Head 80 Ω (typ) +20% (f = 70kHz)

.

OSC Coil: Model name 7QM3, Prototype No. C-14290, Tokyo Parts Ind. Co., Ltd. Tel = 0270-25-1191

PinNo. 3to2 2to1 6to5 5to4
Wire type 2UEW 0.09 ←←←
Total number of

coils

–15%

–25%

–10%

32T 20T 180T 25T

No.4750-2/10

LA7286

(2) Application circuit 2 (erase head parallel type)

.

R/P Head 58 kΩ (typ) +10% (f = 70kHz)

.

AE Head 180 Ω (typ) +25% (f = 70kHz)

.

FE Head 80 Ω (typ) +20% (f = 70kHz)

.

OSC Coil:Model name 7QM3, Prototype No. C-14284, Tokyo Parts Ind. Co., Ltd.

PinNo. 3to2 2to1 4to5 5to6
Wire type 2UEW 0.10 ←←←
Total number of

coils

* The head specifications are as agreed upon by Alps Electric and Sanyo.

Block Diagram

–20%

–5%

–20%

15T 25T 110T 30T

No.4750-3/10