MAX2172 Provides Complete Digital-Tuner Solution

Maxim Integrated Products has introduced the MAX2172 digital radio tuner for FM and digital audio broadcast (DAB) signals, with a high sensitivity for the FM, VHF and L-band frequency ranges. This device integrates all components necessary to implement a complete tuner solution, including LNAs, mixers, an IF filter and a fully synthesised local oscillator.

Additionally, the IC integrates a front-end tracking filter to eliminate interference between the UHF, VHF and FM bands. An on-chip received signal-strength indicator (RSSI) and temperature sensor ensure fast and accurate scan and seek functions. The RSSI provides +/-2dB accuracy and outputs the measured level in digital form through the I2C bus. FM sensitivity is -111dBm (typ) and FM adjacent-channel performance meets ETSI EN 55020.

Drawing 61mA (typ) from a single 3V supply, the MAX2172 strikes an excellent balance between performance and power consumption, making it ideal for consumer and automotive applications. The MAX2172 utilises a standard 2.048MHz IF frequency that is compatible with most DAB digital demodulators. The device is packaged in a lead-free, 6 x 6mm 40-pin TQFN and is fully specified over the -40 to +85C extended temperature range. An evaluation kit is available to speed designs.

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