MC44C801 - Motorola

MC44C801 (MC44C800 / MC44C801) Single Chip CMOS Broadband Tuner

The simplified block diagrams below shows the major sections of the IC. Input frequency range is 50 to 861 MHz. On the MC44C801, the gain of the internal LNA is set via the SPI bus depending on the input signal level. The MC44C800 utilizes an ext ernal variable gain device. The signal is then up converted to 1120 MHz and passed through the first IF filter. T.

Features

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• Integrated frequency synthesizers and prescalers. One fully integrated VCO and one VCO requiring only an external inductor. Up conversion mixer. Down conversion mixer. Variable Gain LNA with 21 dB gain control (MC44C801 only). Reference oscillator circuit (using an external 25 MHz crystal). Minimum CTB of
  – 66 dBc, CSO of
  –60 dBc and XMod of
  –57 dB with +3 dBmV AGC attack point. Typical noise figure of MC44C801 is 6.2 dB. Phase noise @ 10 KHz offset of
  –94 dBc/Hz, typical. Single 5 V supply operation. SPI bus interface. Internal self-diagnostic circu.