MAX3580ETJ+

Video Processing Overview

The MAX3580ETJ+ is a fully integrated direct-conversion TV tuner designed for DVB-T applications. It covers VHF-III (170MHz to 230MHz) and UHF (470MHz to 878MHz) bands. The device integrates an RF input switch, multiband tracking filter, and zero-IF architecture with I/Q baseband outputs, eliminating SAW filters. It features dynamic gain control exceeding 76dB, a typical noise figure of 4.7dB, and on-chip DC-offset cancellation. Powered by a +3.3V supply, it dissipates 650mW and communicates via a 2-wire serial bus.

Video Processing Feature Summary

• Zero-IF architecture provides direct I and Q baseband outputs to the demodulator without intermediate frequency stages.
• Integrated mixed-signal DC-offset cancellation improves second-order distortion performance and downstream dynamic range.
• Frac-N synthesizer optimizes in-band and wideband phase noise for OFDM signal sensitivity.
• On-chip tunable baseband lowpass filters and RF tracking filters reduce external component requirements.

Video Processing Applications

• Digital Televisions
• Digital Terrestrial Set-Tops
• Laptop Televisions
• USB Peripherals

Video Processing Procurement Notes

Verify the specific suffix against official documentation to confirm package type and compliance status. The '+' suffix indicates lead-free and RoHS-compliant packaging. Confirm the operating temperature range matches the -40°C to +85°C industrial specification. Ensure the design supports the required 32-pin TQFN exposed pad soldering for thermal management and ground connection.

Video Processing Selection Notes

Select this component for designs requiring a single-chip solution for DVB-T reception that minimizes board space and eliminates SAW filters. The device is suitable for applications needing high linearity and low power consumption within a compact footprint. Verify system compatibility with the 2-wire serial interface and ensure the host processor can manage the register configuration for tuning and gain control.

Video Processing Part Context

This part belongs to the Maxim Integrated direct-conversion TV tuner family. It is specifically engineered for digital terrestrial broadcasting standards. The ETJ+ designation identifies the industrial temperature grade variant housed in a 32-pin Thin Quad Flatpack No-lead package with an exposed paddle.

Video Processing Replacement Considerations

Consult official manufacturer substitution guides for verified alternatives. Cross-reference pinouts and electrical specifications carefully when considering other tuner ICs from different manufacturers.

Video Processing FAQ

How does the MAX3580 eliminate the need for SAW filters?

It utilizes a zero-IF architecture that converts the RF signal directly to baseband I and Q outputs, removing the requirement for intermediate frequency filtering stages.

What mechanism is used for DC-offset correction?

The device implements on-chip DC-offset cancellation using a mixed-signal architecture to maintain signal integrity and improve dynamic range.