adeka 3800视频放大方案_电子技术

adeka 3800视频放大方案

点击数：7945 次录入时间：03-04 12:03:42 整理：http://www.55dianzi.com 电子技术

Cadeka 公司的CLC3800是三路低成本视频放大器,能以2Vpp驱动一个150欧姆或2个75欧姆负载. CLC3800还集成了8MHz 4阶低通滤波器以得到清晰的视频信号. CLC3800的固定增益为6dB, CLC3801的固定增益为9dB,CLC3802的固定增益为12dB.

CLC380x系列广泛应用在有线电视或卫星电视机顶盒(STB),便携式DVD播放器,DVD播放器,带视频输出的手提媒体波澜器(PMP)以及视频点播和视频录像机等.本文介绍了CLC3800的主要性能,方框图,输入和输出配置以及多种典型的应用电路图.

CLC3800 - Triple, Standard Definition Video Amplifier
The CLC3800 (6dB), CLC3801 (9dB), and CLC3802 (12dB) are triple low cost video amplifiers capable of driving 2Vpp into 1 (150Ω) or 2 (75Ω) video loads. The CLC3800, CLC3801, and CLC3802 feature integrated 8MHz, 4th-order low pass filters designed to cleanly pass standard definition video signals while filtering out noise and other unwanted signals , resulting in a crisper, cleaner video signal. The 4th-order filters provide improved image quality when compared to 2nd-order passive filtering solutions.

The CLC3800 video amplifier offers a fixed gain of 6dB. This integrated gain compensates for the voltage drop inherent in properly terminated video loads; ensuring a 1Vpp video signal is present at the load. If additional gain is required, the CLC3801 video amplifier offers a fixed gain of 9dB and the CLC3802 offers 12dB.
All three video amplifiers can be driven by DC-coupled signals. Thier outputs can drive either AC- or DC-coupled loads.

These video amplifiers operate from 3V to 7V supplies and consume 8.8mA of supply current, making them well suited for battery powered devices.

The CLC3800is a triple low cost video amplifier capable of driving 2Vpp into 1 (150Ω) or 2 (75Ω) video loads. The CLC3800 features integrated 8MHz, 4th-order low pass filters designed to cleanly pass standard definition video signals while filtering out noise and other unwanted signals, resulting in a crisper, cleaner video signal. The CLC3800 video amplifier offers a fixed gain of 6dB. If additional gain is required, the CLC3801 video amplifier offers a fixed gain of 9dB and the CLC3802 offers 12dB. The CLC3800 can be driven by DC-coupled signals. Its outputs can drive either AC- or DC-coupled loads.
Features
CLC3800主要特性:
Integrated 4th-order, 8MHz filters
Integrated 6, 9, or 12dB video drivers
8.8mA total supply current
0.05%/0.02˚ differential gain/phase error
DC coupled inputs
AC or DC coupled outputs
DC-coupled outputs remove the need for AC-coupling capacitors
Each channel can drive 2Vpp into 1 or 2 video loads (150Ω or 75Ω)
0.1% THD
Operates from 3V to 7V supplies
Pb-free SOIC-8 or DFN-8 packages
-40°C to +125°C operating temp. range

主要应用:
Cable or satellite set-top-box (STB)
Portable DVD players
DVD players
Portable media players with video out
Video on demand
Personal video recorders