SI2157-A30-GM

Video Processing Overview

The Si2157-A30-GM is a worldwide hybrid TV tuner supporting digital and analog reception for terrestrial and cable standards. It integrates a 5th-generation RF front-end with a digital low-IF architecture, eliminating the need for external baluns, tracking filters, LNAs, SAW filters, or inductive power supply filtering. The device operates on 3.3 V and 1.8 V supplies, or single-supply 3.3 V only. Key electrical specifications include an RF input frequency range of 42 to 870 MHz, total power consumption of 496 mW in ATV mode with XOUT disabled, and LO integrated phase noise of 0.25 dBc rms at 860 MHz.

Video Processing Feature Summary

• Combines digital low-IF architecture with a fifth-generation RF front-end for high performance.
• Delivers industry-leading second-order distortion performance exceeding discrete MOPLL-based tuners.
• Features a harmonic rejection mixer providing outstanding immunity to Wi-Fi and LTE interference.
• Offers software-selectable cable mode optimized for return loss.

Video Processing Applications

• Hybrid ½-NIM tuner module
• Integrated Digital TV (iDTV)
• Hybrid terrestrial and cable set-top boxes (STB)
• Hybrid PVR, DVD, and Blu-Ray disc recorders
• PC-TV accessories

Video Processing Procurement Notes

Verify that the specific ordering suffix matches the required voltage configuration and package variant. Confirm RoHS compliance status through official documentation. Ensure compatibility with existing system interfaces, as the device supports combined ALIF/DLIF output to SoC and optional DLIF output to external demodulators. Cross-reference pin assignments against the target PCB layout to ensure correct integration.

Video Processing Selection Notes

Select this component when minimizing bill of materials is critical, as it requires no external balun, SAW filters, or wire-wound inductors. Choose the Si2157 for applications demanding superior real-world reception tolerance and high immunity to Wi-Fi and LTE interference. It is suitable for designs requiring flexible output interfaces and integrated power-on reset circuits within a compact 4x4 mm QFN-28 package.

Video Processing Part Context

The Si2157 represents a highly integrated solution for hybrid TV tuning, merging RF and baseband functions into a single chip. Its design leverages Silicon Laboratories' proprietary architecture to achieve best-in-class performance metrics while reducing component count. This integration simplifies board design and improves overall system reliability compared to traditional multi-component tuner solutions.

Video Processing Replacement Considerations

The datasheet notes pin- and API-compatibility with previous generation devices, suggesting potential backward compatibility within the same product family. Verify specific electrical parameters and interface requirements before substituting with other models.

Video Processing FAQ

Does the Si2157 require external components for signal filtering?

No, the Si2157 delivers unprecedented integration with no external balun, tracking filters, LNAs, SAW filters, or inductive power supply filtering required.

What power supply options are available for the Si2157?

The device supports dual supplies of 3.3 V and 1.8 V, or a single-supply option for 3.3 V-only operation.