DAB RF to Bits tuner eliminates the need for a dedicated demodulator
The industry’s first RF to Bits DAB/FM tuner integrates a radio tuner, analog-to-digital converter, and digital filtering, and uses a digital I2S output to interface directly to digital signal processors.
RF to Bits radios will enable system designers to implement baseband processing using off-the-shelf DSPs. This architectural partition will facilitate faster development times and seamless software based upgradability. This level of integration eliminates numerous external components associated with traditional RF tuners to reduce cost, BOM count, and space.
By integrating ADCs with digital filtering, the MAX2173 reduces the output data rate and eases the processing load on the back-end DSP. The clear separation between the radio’s front-end and the DSP simplifies system design. The DSP’s processing capacity is freed to support other functions or future upgrades. The MAX2173’s high performance and flexible RF front-end supports DAB, FM, and Terrestrial Digital Multimedia Broadcast (T-DMB) applications in the FM, VHF band-III, and L-band frequency bands.
The device has a wide applications range – DAB and T-DMB for VHF band-III (168 MHz to 240 MHz), L-band (1452 MHz to 1492 MHz), and FM band (76 MHz to 108 MHz) – and enables SDR implementations for higher system level flexibility and software reuse.
The MAX2173 features an integrated RF tuner, ADCs and digital filtering lower back-end DSP MIPs, reduce hardware costs, and free space. An integrated digitally controlled crystal oscillator (DCXO) eliminates the need for a voltage-controlled crystal oscillator (VCXO), which reduces costs and improves accuracy. Integrated low-dropout regulators (LDOs) eliminate the need for an external regulator.
The MAX2173 is available in a 40-pin TQFN package (6 mm x 6 mm). The device is specified across the -40 °C to +85 °C temperature range.