Description

The CXA3038N is an IC for IQ-detection of DSS, DVB, and other digital satellite broadcast QPSK modulation signals in the 480 MHz band. It consists of an AGC amplifier circuit, oscillator circuit, phase shifter circuit, and phase comparison circuit. In addition, the chip has a PLL circuit for frequency control and built-in control data. It realizes high accuracy oscillator frequencies through use of a low cost LC resonance circuit.

Features

• Built-in PLL for controlling oscillator frequency.

• Oscillator frequency based at 479.5 MHz is adjustable in ±4 steps of 50 kHz using the voltage of the control pin.

• Reference OSC allows switching to 4 MHz or 10 MHz.

• Built-in output buffer for reference OSC.

• Low-impedance IQ output.

• AGC gain variation 35 dB.

Applications

Digital satellite broadcast tuner

Structure

Bipolar silicon monolithic IC