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The MAX2161/MAX2162 low-IF tuner ICs are designed
for use in 1- and 3-segment ISDB-T applications. These
devices directly convert VHF- and UHF-band signals to
a low-IF using a broadband downconverter. The operating
frequency range extends across the 170MHz to
222MHz VHF band (ISDB-TSB) and the 470MHz to
770MHz UHF band.
The MAX2161/MAX2162 include an LNA, RF variable-gain
amplifiers, downconverting mixers, a power detector, an
IF variable-gain amplifier, and a low-IF bandpass filter.
These parts are capable of operating with either highside
or low-side local oscillator (LO) injection. The
MAX2161/MAX2162s' variable-gain amplifiers provide in
excess of 106dB of total gain-control range.
The MAX2161/MAX2162 also include fully monolithic
VCOs and tank circuits as well as a complete frequency
synthesizer. These devices operate with crystal/TCXO
oscillators from 32MHz to 40MHz. Additionally, a fixed
divide-by-2 frequency divider is provided for the
XTAL/TCXO oscillator allowing for simple and low-cost
interfacing to various channel decoders.
The MAX2161 features a 2-wire I²C-compatible serial
interface, while the MAX2162 features a 3-wire SPI™/QSPI™/MICROWIRE™-compatible serial interface. Both
devices feature a low-power standby mode in which the
entire signal path is shut down while the serial interface
and register circuits are left active. In addition, both
devices can be entirely shut down through either the
serial interface or an external logic pin.
The MAX2161/MAX2162 are specified for operation in
the extended -40°C to +85°C temperature range and
are available in either a 3.275mm x 3.45mm x 0.55mm,
lead-free, wafer-level package (WLP) or a 6mm x 6mm
x 0.8mm, 40-pin thin QFN, lead-free plastic package
with exposed paddle (EP).
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