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RC2798

Features: • RF input frequency range 30 to 250MHz• On chip VCO with LO frequency range 30 to 250MHz• IF amplifier with AGC setting• High dynamic range -9dBm IIP3• On chip Video Amplifier• Built in ESD protection• Supply voltage range 5 to 10 V• Space...

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SeekIC No. : 004472563 Detail

RC2798: Features: • RF input frequency range 30 to 250MHz• On chip VCO with LO frequency range 30 to 250MHz• IF amplifier with AGC setting• High dynamic range -9dBm IIP3• On ch...

RC2798 Data Sheet

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Part Number:
RC2798
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2025/12/27

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Product Details

Description



Features:

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


Application

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


Pinout

Connection Diagram


Specifications

Parameter Test conditions Min. Typ. Max. Unit
Video Amplifier 5V Operation
Vcc_Mix Supply voltage 1 (for AGC amplifier,
oscillator, and mixer)		 AGC amplifier, oscillator,
and mixer block		     6 V
VccVamp Supply voltage 2 ( for video
amplifier)		 Video amplifier block     6 V
PD Power dissipation TA = 851     430 mW
TA Operation temperature range   -40   +85
Tstg Storage temperature range   -55   +150
Video Amplifier 9V Operation
Vcc_Mix Supply voltage 1 (for AGC amplifier,
oscillator, and mixer)		 AGC amplifier, oscillator,
and mixer block		     6 V
VccVamp Supply voltage 2 ( for video
amplifier)		 Video amplifier block     11 V
PD Power dissipation TA = 751     500 mW
TA Operation temperature range   -40   +75
Tstg Storage temperature range   -55   +150



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.

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.




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