Description

The CXA3108AQ is a monolithic IC that downconverts the L-band (1 to 2 GHz) 1st IF to 2nd IF for satellite broadcast receivers. It integrates a local oscillator circuit, double-balanced mixer, IF AGC amplifier and tuning PLL onto a single chip.

This IC supports both analog and digital satellite broadcasts, and achieves reduction in the number of tuner components and smaller size.

Features

• On-chip tuning PLL

• Supports 2.65 GHz oscillator frequency

• Noise figure: 12.5 dB typ. (for IF full gain)

• IF AGC gain variation: 46 dB typ.

• Wide band IF AGC amplifier (60 to 500 MHz)

• Two IF outputs

• PLL supports I2C protocol

• On-chip high voltage drive transistor for charge pump

Applications

• Analog satellite broadcast tuners (BS/CS)

• Digital satellite broadcast tuners (DSS/DVB, etc.)