The MAX2165 direct-conversion tuner IC is designed for
handheld digital video broadcast (DVB-H) applications.
The tuner covers a 470MHz to 780MHz input frequency
range and features an I/Q baseband interface.
The MAX2165's direct-conversion architecture eliminates
the need for an IF-SAW filter, allowing for
reduced bill of materials cost. The design integrates a
variable-gain, low-noise amplifier (LNA); a notch filter;
an RF tracking filter; a quadrature mixer; a power
detector; programmable baseband lowpass channel-selection
filters; baseband variable-gain amplifiers
(VGA); DC offset correction circuitry; and a complete
fractional-N frequency synthesizer. The part is programmable
through a 2-wire I²C-compatible serial interface.
The MAX2165 integrates a tuneable notch filter. This filter
is designed to notch out interfering signals in the
830MHz to 950MHz frequency range to allow for operation
in the presence of large cellular signals.
Programmable baseband channel-selection filters allow
for operation with 7MHz and 8MHz channels. Digital DC
offset correction circuitry supports time-sliced operation
by minimizing power-up time delay. The fractional-N
synthesizer reduces VCO lock time and minimizes
close-in phase noise, eliminating the need for power-hungry,
phase-noise reduction algorithms.
The MAX2165 is available in a tiny, 5mm x 5mm x 0.8mm, 28-pin thin QFN package with an exposed paddle. It is specified for operation over the -40°C to +85°C
extended temperature range.
Key Features
Applications/Uses
93mA (typ) Current Consumption from a Single +2.85V Supply Voltage
21mW (typ) Average Power Consumption at 8% Duty Cycle
