MFG:N/A Package Cooled:N/A D/C:N/A
MFG: N/A
Package Cooled: N/A
D/C: N/A
Description: The RC2798 is an integrated solution for the downconversion of QAM IF signals in the front-end design ...
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.
| 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 | |||
RC2798
PDF/DataSheet Download
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