آر اف (فرکانس رادیویی) و بی‌سیم سایر آی سی‌ و ماژول‌های آر اف

Product Attributes

Introduction

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 low-power, tuner-on-board designs. The direct-conversion 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.

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
• +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

Applications

• Fixed and Mobile Digital Audio Broadcast (DAB, DAB+) with FM
• Terrestrial Digital Multimedia Broadcast (TDMB) with FM