RC2798数据手册ONSEMI中文资料规格书

描述 Description

The RC2798 is an integrated solution for the downconversion of QAM IF signals in the front-end design of cable modem and set-top receivers. It is intended for use in 64QAM and 256QAM IF downconversion applications.The RC2798 integrates IF amplifier with AGC , mixer, VCO,and a video amplifier on a single chip. It accepts the QAM IF signals via SAW filter and downconverts it to 5MHz baseband signal.\r
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The baseband signal can be digitized using Fairchild Semiconductor’s 8 bit A/D (TMC1175 series) or 10bit A/D (TMC1185 series) and decoded further with a QAM demodulator. The IF, Oscillator and Mixer section work at 5V. The video amplifier works at 5V to 10V. The RC2798 is available in a 20 Lead TSSOP package.

特性 Features

• RF input frequency range 30 to 250MHz\r
• On chip VCO with LO frequency range 30 to 250MHz\r
• IF amplifier with AGC setting\r
• High dynamic range -9dBm IIP3\r
• On chip Video Amplifier\r
• Built in ESD protection\r
• Supply voltage range 5 to 10 V\r
• Space saving 20-Lead TSSOP package

应用 Application

• Digital Set-top receivers\r
• Cable modems\r
• Internet surfboards\r
• Network Interface Modules\r
• Multimedia PCs