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參數(shù)資料
| 型號(hào)： | LA74302FN |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | AUDIO AMPLIFIER, QCC28 |
| 封裝： | 5 X 5 MM, VQFN-28 |
| 文件頁(yè)數(shù)： | 4/12頁(yè) |
| 文件大?。?/td> | 147K |
| 代理商： | LA74302FN |
LA75676NVA
No.A1005-12/12
Notes on VCO Transformer Circuits
Built-in capacitor VCO transformer circuits
When power is first applied, the heat generated by the IC is transmitted through the printed circuit board to the VCO
tank circuit. However, the VCO coil frame functions as a heat sink and dissipates the heat form the IC. As a result, it
is relatively difficult to transmit heat to the VCO transformers built-in capacitor, and drift at power on is minimal.
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 transformer 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 power is applied, the
coil is not so 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.
PS
This catalog provides information as of March, 2008. Specifications and information herein are subject
to change without notice.
SANYO Semiconductor Co.,Ltd. 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 Semiconductor Co.,Ltd.
products described or contained herein.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents 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.
Upon using the technical information or products described herein, neither warranty nor license shall be granted
with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's
intellectual property rights which has resulted from the use of the technical information and products mentioned
above.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
for volume production.
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 Semiconductor Co.,Ltd. product that you intend to use.
In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are
controlled under any of applicable local export control laws and regulations, such products may require 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 consent of SANYO Semiconductor Co.,Ltd.
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PDF描述 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA74303FN | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Monolithic Linear IC Audio Interface for DSC |
| LA74308LP | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Monolithic Linear IC Audio Interface for DSC |
| LA74308LP_08 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Audio Interface for DSC |
| LA74309FA | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Microphone Amplifier for Digital Still Camera |
| LA74309FA-AH | 功能描述:音頻放大器 MICROPHONE AMPLIFIER(DSC) RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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