LA75691 Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LA75691

IF Signal-Processing IC for PAL/NTSC Multichannel Audio TV and VCR Systems

SANYO -> Panasonic 

Coil Specifications

JAPAN

f = 58.75 MHz

VCO coils

LA75691

US

f = 45.75 MHz

PAL

f = 38.9 MHz

SAW filters (split)

SAW filters (inter)

Test production no. 16991B

Tokyo Parts Industrial Co., Ltd.

Picture

TSF1137U

Sound

Test production no. 16687B

Tokyo Parts Industrial Co., Ltd.

Picture

TSF1241

Sound

TSF5220

TSF5221

Test production no. 16686B

Tokyo Parts Industrial Co., Ltd.

Picture

TSF5315

Sound

TSF5321

TSF5344

Notes on VCO Tank Circuits

• Built-in capacitor VCO tank circuits

When power is applied to the IC, the heat generated by the IC is transmitted through the printed circuit board to the

VCO tank circuit. At this point, the VCO coil frame functions as a heat sink and the IC heat is dissipated. As a result,

this heat is not transmitted readily to the VCO tank circuit's built-in capacitor, and drift at power on is reduced.

Therefore, it suffices to design the circuit so that the coil and capacitor thermal characteristics cancel. Ideally, it is

better to use a coil with a core material that has low temperature coefficient characteristics.

• External capacitor VCO tank circuits

When an external capacitor is used, heat generated by the IC is transmitted through the printed circuit board directly to

the VCO tank circuit external capacitor. While this capacitor is heated relatively early after the power is turned on, the

coil is not influenced as much by this heat, and as a result the power-on drift is larger. Accordingly, a coil whose core

material has low temperature coefficient characteristics must be used. It is also desirable to use a capacitor with

similarly low temperature coefficient characteristics.

Note: Applications that use an external capacitor here must use a chip capacitor. If an ordinary capacitor is used,

problems such as the oscillator frequency changing with the capacitor orientation may occur.

Specifications of any and all SANYO products described or contained herein stipulate the performance,

characteristics, and functions of the described products in the independent state, and are not guarantees

of the performance, characteristics, and functions of the described products as mounted in the customer’s

products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,

the customer should always evaluate and test devices mounted in the customer’s products or equipment.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all

semiconductor products fail with some probability. It is possible that these probabilistic failures could

give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,

or that could cause damage to other property. When designing equipment, adopt safety measures so

that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective

circuits and error prevention circuits for safe design, redundant design, and structural design.

In the event that any or all SANYO products (including technical data, services) described or contained

herein are controlled under any of applicable local export control laws and regulations, such products must

not be exported without obtaining the export license from the authorities concerned in accordance with the

above law.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic or

mechanical, including photocopying and recording, or any information storage or retrieval system,

or otherwise, without the prior written permission of SANYO Electric Co., Ltd.

Any and all information described or contained herein are subject to change without notice due to

product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”

for the SANYO product that you intend to use.

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.

This catalog provides information as of June, 1998. Specifications and information herein are subject to

change without notice.

PS No. 5734-13/13

Share Link: