Maxim - Digital Radio Tuner for DAB and FM Signals Integrates Fast RSSI Function

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, 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 an outstanding -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 utilizes a standard 2.048MHz IF frequency that is compatible with most DAB digital demodulators. The device is packaged in a lead-free, 6mm x 6mm, 40-pin TQFN, and is fully specified over the -40 degrees Celsius to +85 degrees Celsius extended temperature range.