The M88DC2800 is a single-chip QAM demodulator that supports 16, 32, 64, 128 and
256-QAM signals. The device is fully compliant with DVB-C and ITU-T J83 annex A/C specifications. Together with a cable tuner, the M88DC2800 provides a digital front-end
solution for compressed television, sound and data services over cable.
The M88DC2800 accepts IF signals from the tuner and outputs MPEG-2 transport streams to the decoder. It performs all necessary demodulation and FEC (Forward Error Correction)
functions for recovery of QAM modulated bit streams. The integration of A/D converter,
programmable gain amplifier, internal supply regulator and reference generator reduces
external components and saves BOM cost.
The M88DC2800 offers strong echo mitigation and symbol timing offset mitigation as well as
carrier suppresstion. The device is controlled via a 2-wire bus. The device is operated from a
single 3.3 V power supply and the power consumption is only 180 mW at 7.2 MSymbol/s.
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Fully compliant with DVB-C and ITU J83 A/C specifications |
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16, 32, 64, 128 and 256-QAM supported |
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Symbol rates of 0.87 Mbaud to 9 Mbaud |
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On-chip 10-bit A/D converter for direct IF applications |
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Dual AGC for IF and RF gain control |
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Integrated PGA to accommodate 0.7 V to 1.1 V input signals |
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Front derotator for better low symbol rate performance and relaxed tuner constraints |
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Full digital demodulation with integrated matched filter and adaptive equalizer |
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Strong echo mitigation |
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Automatic spectrum inversion |
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Excellent adjacent-channel and co-channel interference suppresstion |
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Excellent symbol timing offset mitigation and carrier suppression |
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On-chip FEC decoder with individually bypassable blocks |
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Integrated BER and SNR indicators for signal quality monitoring |
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Lock and interrupt indication available on pins |
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Constellations read out support |
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Internal supply regulator and reference generator to reduce BOM cost |
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On-chip system clock from external quartz crystal |
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Auxiliary clock output for external use |
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Parallel and serial interfaces, with DVB common interface support |
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Fully configurable MPEG-TS output pins to optimize PCB board layout |
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2-wire bus for control and monitoring |
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Dedicated 2-wire bus repeater to control tuner |
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Digital CMOS technology, 3.3 V power supply |
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Low power consumption: 180 mW at 7.2 MSymbol/s |
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Green package: 64-pin LQFP |
