SANYO LA7289 Datasheet

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

max 14 V

Pin 2 input voltage V

2DC ±45 Vp-p

Pin 2 input current I

2 ±1.5 mA Allowable power dissipation Pd max Ta ≤ 65 °C 500 mW Operating temperature Topr –10 to +65 °C Storage temperature Tstg –55 to +150 °C

Ordering number : EN5642

43097HA(OT) No. 5642-1/11

Overview

The LA7289 includes on chip all functions required for the record and playback of VCR audio signals and achieves complete adjustment-free operation by the adoption of an automatic record bias current adjustment circuit. In addition, the inclusion of a switching circuit for switching between tuner and line input in addition to the circuits provided by earlier ICs makes the LA7289 truly optimal for audio VCR products.

Functions

• Equalizer amplifier

• Ripple filter

• Record/playback switching circuit

• Muting

• SP/LP/EP switching circuit

• Record amplifier

• ALC

• Tape head switching circuit

• Automatic record bias adjustment circuit

• Input switching circuit (line/tuner)

Features

• Adjustment-free record bias current (automatic adjustment circuit adopted)

• Built-in record bias oscillator circuit power supply switch

• Record equalizer choke coil no longer required

• Playback amplifier input noise voltage: 1.0 µV rms

• Value of the ALC detector capacitor reduced (to 3.3 µF)

• Built-in high-voltage head switching circuit

• Supply voltage: supports both 9 and 12-V operation

• Built-in input switching circuit (for the line and tuner inputs)

Package Dimensions

unit: mm

3067-DIP24S

SANYO: DIP24S

[LA7289]

LA7289

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

VCR Audio Signal Record and Playback Processor

Monolithic Linear IC

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Recommended supply voltage V

9, 12 V

Allowable operating voltage range V

op 8.5 to 12.5 V

Operating Conditions at Ta = 25°C

No. 5642-2/11

LA7289

Parameter Symbol Conditions

Ratings

Unit

min typ max

Current drain (EE) I

CCE

No signal 10.0 12.5 15.0 mA

Current drain (playback) I

CCP

No signal 11.2 14.0 16.8 mA

Current drain (record) I

CCR

No signal 9.6 12.0 14.4 mA [Equalizer amplifier] Open-circuit voltage gain VG

VO= –6dBV 58.4 64.4 – dB Input noise voltage V

NIE

Rg = 620 Ω, DIN audio filter – 1.0 1.8 µVrms [Line Amplifier] Voltage gain (PB input) VG

VO= –6dBV 20.1 20.6 21.1 dB Voltage gain (LINE input) VG

VO= –6dBV 20.1 20.6 21.1 dB Voltage gain (TUNER input) VG

VO= –6dBV 20.1 20.6 21.1 dB Harmonic distortion THD

VO= –6dBV – 0.05 0.3 % Output noise voltage V

NOL

Rg = 620 Ω, DIN audio filter – –75 –69 dBV Maximum output voltage V

OML

THD = 1% 1.7 2.5 – Vrms Output voltage when ALC operating V

VIN= –25dBV –7 –6 –5 dBV ALC effect ALC V

= –25dBV to –5dBV – 1 3 dB

Total harmonic distortion when ALC operating

THD

VIN= –25dBV – 0.05 0.6 % [Record Amplifier] Voltage gain VG

VO= –6dBV 13.5 14.0 14.5 dB Harmonic distortion THD

VO= –6dBV – 0.05 0.3 % Maximum output voltage V

OMR

THD = 1% 1.7 2.5 – Vrms [REC/EE Switching Circuit] Record mode hold voltage V

The pin 19 DC voltage 3.6 – 6.0 V EE mode hold voltage V

The pin 19 DC voltage 0 – 1 V [Muting Circuit] On state hold voltage V

MON

The pin 18 DC voltage 3.6 – 6.0 V Off state hold voltage V

MOFF

The pin 18 DC voltage 0 – 1 V Muting attenuation

, ML, M

80 90 – dB

(PB, LINE. TUNER) [PB, LINE. TUNER Switching Circuit]

PB mode hold voltage V

The pin 17 DC voltage 3.6 – 6.0 V LINE mode hold voltage V

The pin 17 DC voltage 1.8 – 2.6 V TUNER mode hold voltage V

The pin 17 DC voltage 0 – 1.0 V [EP. LP. SP Switching Circuit] EP mode hold voltage V

The pin 16 DC voltage 3.6 – 6.0 V LP mode hold voltage V

The pin 16 DC voltage 1.8 – 2.6 V SP mode hold voltage V

The pin 16 DC voltage 0 – 0.8 V [Switching Circuit] Pin 2 on resistance R

2 I1 = ±1 mA – 10 30 Ω

Pin 2 input voltage V

2 Ta = 65°C, f = 70 kHz (sin), ILK= 10 µA – – ±45 V [Record Bias Automatic Adjustment Circuit] Record bias current I

220 245 270 µA

Pin 1 output control range V1 2.0 4.0 6.0 V

Electrical Characteristics at Ta = 25°C, VCC= 12 V, f = 1 kHz, 0 dBV = 1.0 Vrms

No. 5642-3/11

LA7289

Test Circuit

No. 5642-4/11

LA7289

Switching Operations

Test item (signal) SW1 SW2 SW3 SW4 SW5 SW6 V

Input Measurement

CCE

2 1 3 2 2 2 GND GND GND - I

CCP

2 1 3 2 2 2 GND 5 V GND - I

CCR

2 1 3 2 2 2 GND GND 5 V - I

1 2 3 2 2 2 GND 5 V GND VIN1 VO1

NIE

2 1 3 2 2 2 GND 5 V GND - VO1

, THDL, V

OML

2 1 2 2 2 2 GND 5 V GND VIN2 VO2

2 1 3 2 2 1 GND 2 V GND VIN4 VO2

2 1 3 2 1 2 GND GND GND VIN3 VO2

NOL

2 1 3 2 2 2 GND GND GND - VO2

, ALC, THD

2 1 3 1 1 2 GND GND GND VIN3 VO2

, THDR, V

OMR

2 1 3 2 2 2 GND GND 5 V VIN5 VO3

1 1 1 2 2 2 5 V 5 V GND VIN1 VO2

2 1 3 2 2 1 5 V 2 V GND VIN4 VO2

2 1 3 2 1 2 5 V GND GND VIN3 VO2

2 1 1 2 2 2 GND GND 5 V - VO4

V1 2 1 1 2 2 2 GND GND 5 V - V1

Head Coil Specifications

1. Application circuit 1 (Series erase head type)

• R/P Head 58 kΩ ± 15 % (f = 70 kHz)

• AE Head 34 Ω ± 20 % (f = 70 kHz)

• FE Head 80 Ω ± 15 % (f = 70 kHz)

• Oscillator coil test number: 15419A, Model no. 7QM3

2 Application circuit 2 (Parallel erase head type)

• R/P Head 58 kΩ ± 15 % (f = 70 kHz)

• AE Head 180 Ω ± 20 % (f = 70 kHz)

• FE Head 80 Ω ± 15 % (f = 70 kHz)

• Oscillator coil test number: 15415A, Model no. 7QM3

For more information contact: Tokyo Parts Industries Co., Ltd. Telephone: +81-270-25-1191

Pin No. 3 - 2 2 - 1 6 - 5 5 - 4 Line type 2UEW-0.09 2UEW-0.09 2UEW-0.09 2UEW-0.09 Total windings 32T 20T 176T 29T

Pin No. 3 - 2 2 - 1 4 - 5 5 - 6 Line type 2UEW-0.10 2UEW-0.10 2UEW-0.10 2UEW-0.10 Total windings 10T 22T 104T 22T

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