The MAX2598 quad-band direct-conversion bits-to-RF radio transmitter is designed for 1x (3.84Mcps) and 2x (7.68Mcps) TDD-WCDMA applications. The part supports operation in the 874MHz, 1900MHz to 1920MHz, 2010MHz to 2025MHz, and 2050MHz to 2082MHz frequency bands.
The unique bits-to-RF architecture of the MAX2598 integrates 3 power amplifiers (PAs), quadrature mixers, variable-gain RF and baseband amplifiers, baseband filters, I and Q digital-to-analog converters (DACs), a fractional-N frequency synthesizer for local oscillator (LO) generation, and a fractional-N frequency synthesizer for sampling clock generation. Data is transferred from the baseband/DSP to the radio by a digital 1-bit sigma-delta modulated I and Q bitstream through an LVDS-like interface. The operating mode of the radio is fully programmable by a 3-wire serial interface.
The MAX2598 is specified for operation in the extended -40°C to +85°C temperature range and is available in a 9mm x 9mm x 1.4mm fcLGA package with exposed paddle (EP).
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