Tuners for set-top boxes, DVRs, PC TVtuner
cards, and the like keep getting
simpler to design in and less demanding
to assemble into end products. Anadigics’
AIT1032 1-GHz double-conversion
tuner implements upconverter, downconverter,
voltage-controlled oscillator (VCO),
synthesizer, RF and IF amplifier, and RF and
IF gain control functions with a combination
of gallium-arsenide (GaAs) and silicon technologies.
It’s designed to avoid interference
in MoCA-enabled (Multimedia Over Coax
Alliance) applications.
The device provides separate 45-MHz IF
outputs for digital and analog signals, with
78-dB (typical) conversion gain on the digital
side, with an adjustable IF amp with a
45-dB gain control range. To support those
legacy TV receivers that are still out there,
the analog output provides 65-dB conversion
gain. On the input, the signal chain starts
with a low-noise amplifier (LNA) with 35
dB of gain-control range. To trim external
parts count, the AIT1032 includes on-chip
oscillator tank circuits that don’t require postassembly
tweaking (see the figure).
To keep design and assembly simple, the
AIT1032 only needs a single +5-V supply.
Additionally, there is a full reference design.
The 48-pin surface-mount package is 7 by
7 by 1 mm and complies with the European
Union’s Restrictions on Hazardous Substances.
Now available, the AIT1032 costs $4.31
in quantities of 5000 units.
DON TUITE
ANADIGICS •
www.anadigics.com