The MicroTuner™ MT2011 is a fully integrated single-chip tuner, with functional blocks specifically designed to ease implementation of high performance digital OpenCable™ set top boxes.

The MT2011 is a dual-conversion tuner design which requires no external tracking filters. This eliminates the need for manual alignments and simplifies its deployment on the production line where consistent high quality and reliability are key factors. The device maintains its controlled impedance across the entire input spectrum and exhibits good selectivity and sensitivity and low in-band emissions. Its low phase noise makes it an excellent choice for digital set top box applications.

The high level of circuit block integration in the MT2011 reduces the number of external components required for a fully functional design, thereby lowering the overall solution cost. It includes a low noise amplifier (LNA) in the front, a Forward Data Channel (FDC) amplifier and an intermediate frequency (IF) buffer amplifier at the back-end. An on-chip System Reference Oscillator (SRO) output with selectable sub-multiples of 1, 2, or 4 can drive an additional tuner or IC in a multi-tuner application. A high first IF followed by an image reject mixer gives the MT2011 unparalleled performance over its entire operating range from 48 MHz to 1 GHz.

All functions of the MT2011 are controlled over a two-wire serial bus. This includes the ability to readback the status registers of the tuner as well as the on-board die temperature sensor.

FEATURES

• 1 GHz bandwidth

• Excellent linearity performance in severely sloped input conditions per SCTE 40 network requirements

• Ease of multi-tuner front-end implementations

• Dual-conversion architecture for consistent high performance with no manual alignments

• Proven performance in dual function digital STB designs

• Elimination of the need for the 28V to 33V supplies typically required by traditional tuners

• 3.3V and 5V serial bus compatible

• Minimal external components

• Software shutdown mode

• Intermediate frequency (IF) output fully compatible with demodulators for DAVIC, DVB C, DOCSIS®, EuroDOCSIS™, and other standards

• Small 8mm x 8mm 56-lead QFN package

• Usable in conjunction with Microtune’s upstream amplifiers to create a complete RF front end for bi-directional STB applications

APPLICATIONS

• Advanced digital set-top boxes (STB)

• Home gateways

• Cable modems

• HDTV