CX24118A-12Z,518

Video Processing Overview

The CX24118A-12Z is a direct down-conversion satellite tuner designed for high-volume digital video, audio, and data receivers. It features an RF input range of 925–2175 MHz and supports symbol rates from 1 to 45 MSps. The device incorporates a zero-IF architecture with integrated local oscillators optimized for advanced modulation systems like 8PSK and DVB-S2. Key electrical specifications include a typical noise figure of 10 dB and an input IP3 of 10 dBm at minimum gain.

Video Processing Feature Summary

• Single-chip RF-to-baseband receiver utilizing zero-IF architecture to eliminate image reject filtering requirements.
• Built-in auto-tuning system that selects appropriate VCO bands without requiring software calibration during initialization or channel changes.
• Variable baseband filters providing optimal interference rejection with selectable bandwidths for different signal conditions.
• Highly integrated design that removes the need for external baluns, reducing bill of materials cost and simplifying RF layout.

Video Processing Applications

• Set-top boxes supporting 8PSK and DVB-S2 advanced modulation standards
• Commercial digital video receivers
• Digital audio receivers
• Personal video recorder (PVR) systems

Video Processing Procurement Notes

Verify the specific ordering suffix matches the required package configuration. Confirm RoHS compliance status as indicated in the product documentation. Ensure the component is sourced from authorized distributors to guarantee authenticity. Check for any specific handling instructions related to the QFN package during assembly processes.

Video Processing Selection Notes

Select this tuner for applications requiring low implementation loss and excellent phase noise performance for advanced modulation schemes. Consider the integrated automatic tuning system if minimizing software complexity is a priority. Evaluate the small footprint requirement against available board space constraints. Verify compatibility with the target demodulator's serial interface requirements.

Video Processing Part Context

This component belongs to NXP's portfolio of advanced modulation digital satellite tuners. It serves as a direct replacement for legacy Conexant designs, specifically derived from the Conexant 102322A datasheet. The part is manufactured using lead-free processes compliant with environmental regulations.

Video Processing Replacement Considerations

The CX24118A is based on the Conexant 102322A design. Verify pinout and register compatibility when substituting older Conexant parts. Ensure the replacement supports the same crystal oscillator frequencies and voltage levels.