LA7285 Sanyo Semiconductor Corporation, LA7285 Datasheet

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LA7285

Manufacturer Part Number
LA7285
Description
VCR audio signal recording and playback processor
Manufacturer
Sanyo Semiconductor Corporation
Datasheet

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Overview
The LA7285 and LA7285M include on chip all functions
required for the record and playback of VCR audio
signals. 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 LA7285
truly optimal for audio VCR products.
Funtions
• Equalizer amplifier
• Line amplifier
• Recording/playback switch
• Recording amplifier
• Mute
• SP, LP, EP switch
• Ripple filter
• ALC
• Tape head switch
• Line/tuner input switch
Features
• Built-in input switching circuit (for the line and tuner
• Smaller package leaves large space for other
• Equalizer input/output capacitors not required.
• Low gain variation eliminates the need for external
• Supply voltage : 9V and 12V operation.
Specifications
Maximum Ratings at Ta = 25˚C
Operating Conditions at Ta=25˚C
Ordering number:EN4091
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Package Dimensions
unit:mm
3067-DIP24S
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3112-MFP24S
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[LA7285M]
LA7285, 7285M
[LA7285]
53098HA (KT) No.4091-1/7
Monolithic Linear IC
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LA7285 Summary of contents

Page 1

... VCR audio signals. 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 LA7285 truly optimal for audio VCR products. Funtions • Equalizer amplifier • ...

Page 2

... Operating Characteristics at Ta=25˚ =12V, f=1kHz, 0dBV : 1.0 Vrms LA7285, 7285M – – – – – – – – – – – ± ± Ta=65˚C, f=80kHz (sin = µ – – – – – ± No.4091-2/7 ...

Page 3

... Block Diagram Test Circuit LA7285, 7285M Unit (resistance: , capacitance:F) No.4091-3/7 ...

Page 4

... Switch Operation Table Sample Application Circuit LA7285, 7285M – – – – – Unit (resistance: , capacitance:F) No.4091-4/7 ...

Page 5

... Pin Function LA7285, 7285M Unit (resistance Internal reference Internal reference ± µ Inputs EE and REC signals. The reference input is set by resistors R1 and R2. The amplifier gain is fixed at 21.5dB. In addition, because the input impedance is as high as 110k , a 0.1 F ceramic capacitor can be used for the coupling capacitor on pin 10 ...

Page 6

... LA7285, 7285M Unit (resistance Internal reference Power supply of each circuit block Inputs EE and RE signals. The reference input is set by resistors R1 and R2.The amplifier gain is fixed at 21.5 dB. In addition, because the input impedance is as high as 110k , a 0.1 F ceramic capacitor can be used for the coupling capacitor on pin 12. ...

Page 7

... 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 May, 1998. Specifications and information herein are subject to change without notice. LA7285, 7285M Unit (resistance ...

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