The MAX2175 provides a buffered differential output of the reference frequency to support multi-tuner systems. The design integrates all key blocks, enabling low-power, tuner-on-board designs with advanced baseband solutions. The tuner includes digital filtering to minimize the MIPS required in the baseband processor to demodulate the desired channel. The resulting I-channel and Q-channel data words are transferred to the baseband via an industry standard I2S digital interface. The MAX2175 IC is available in a 48-pin TQFN package (7- x 7-mm) with an exposed pad. Electrical performance is guaranteed over the extended -40°C to+85°C temperature range.
We have reviewed, at a high level the ideal software defined radio architecture. We discussed the system partitioning steps necessary to enable software control of the baseband signal processing, such that a wide range of radio standards can be received by a single radio platform.