MAX2172ETL+WC8S

Page 1 of 3 MAX2172 Direct-Conversion to Low-IF Tuner for Digital Audio Broadcast High-Performance Digital Radio Tuner Incorporates Fast and Accurate RSSI Function OVERVIEW Description The MAX2172 direct-conversion to low-IF tuner is designed for digital audio broadcast (DAB) and terrestrial digital multimedia broadcast (TDMB) applications, covering an input frequency range of 168MHz to 240MHz (VHF-III), 1452MHz to 1492MHz (L-band), and also 87MHz to 108MHz (FM). The MAX2172 achieves a high level of component integration, allowing lowpower, tuner-on-board designs. The directconversion to low-IF architecture eliminates the need for an IF-SAW filter while providing a balanced 2.048MHz center frequency baseband output to the demodulator. The MAX2172 provides a buffered reference clock at the crystal frequency. A sigma-delta fractional-N synthesizer is incorporated to optimize both close-in and wideband phase noise performances for OFDM applications where sensitivity to both 1kHz phase noise and wideband phase noise related to strong adjacents can be a problem. The MAX2172 is available in a 40-pin thin QFN package (6mm x 6mm) with an exposed pad. Electrical performance is guaranteed over the extended -40°C to +85°C temperature range. MAX2172: Functional Diagram Page 2 of 3 Enlarge+ Key Features • • • • • +2.7V to +3.5V Supply Voltage Range Low-IF Output Eliminates IF-Saw Filter Integrated FM/VHF-III Bandpass Filter Integrated Low-IF Bandpass Filter Sigma-Delta Fractional-N Synthesizer Applications/Uses • Fixed and Mobile Digital Audio Broadcast (DAB, DAB+) with FM Page 3 of 3 • +45dBc ACPR (N±1) • 2.9dB Typical Noise Figure for VHF-III (Includes On-Chip Tracking Filter) • 3.1dB Typical Noise Figure for L-Band • VHF-III Sensitivity of -101dBm • L-Band Sensitivity of -101dBm • Baseband Overload Detector Controls RF AGC • Fast Channel Scan RSSI 5-Bit Output • FM (S+N)/N = 26dB at -111dBm • Small 6mm x 6mm Thin QFN Package http://www.maximintegrated.com/en/products/comms/wireless-rf/MAX2172.html • Terrestrial Digital Multimedia Broadcast (TDMB) with FM 12/9/2014