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MC44C800 - (MC44C800 / MC44C801) Single Chip CMOS Broadband Tuner

Description

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.

Features

  • is given below:.
  • 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.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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MC44C800/801 MOTOROLA SEMICONDUCTOR TECHNICAL DATA Product Brief Single Chip CMOS Broadband Tuner The MC44C800/801 Silicon Tuner ICs are highly integrated single chip broadband tuners for cable data and set-top applications. They receive 50 MHz to 861 MHz cable signals and convert them to a second IF of 36 MHz to 46 MHz. Typical applications include Cable Data Modems, Cable Digital and Analog Settop boxes, VoIP Telephony boxes, etc. These tuners meet all DOCSIS requirements for 64 and 256 QAM. They utilize a double conversion architecture with an external first IF SAW filter at 1120 MHz, and a second IF in the range of 36 MHz to 46 MHz. Both the MC44C800 and the MC44C801 are identical, with the exception that the MC44C801 has a bus programmable variable gain LNA with 21 dB of gain control.
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