آر اف (فرکانس رادیویی) و بی‌سیم آی سی‌ فرستنده‌گیرنده آر اف

Product Attributes

Introduction

The MAX2831/MAX2832 direct conversion, zero-IF, RF transceivers are designed specifically for 2.4GHz to 2.5GHz 802.11g/b WLAN applications. The MAX2831 completely integrates all circuitry required to implement the RF transceiver function, providing an RF power amplifier (PA), RF-to-baseband receive path, baseband-to-RF transmit path, VCO, frequency synthesizer, crystal oscillator, and baseband/control interface. The MAX2832 integrates the same functional blocks except for the PA. Both devices include a fast-settling sigma-delta RF synthesizer with smaller than 20Hz frequency steps and a digitally tuned crystal oscillator allowing use of a low-cost crystal. The devices also integrate on-chip DC-offset cancellation and I/Q errors and carrier leakage-detection circuits. Only an RF bandpass filter (BPF), crystal, RF switch, and a small number of passive components are needed to form a complete 802.11g/b WLAN RF frontend solution.

Features

• 2.4GHz to 2.5GHz ISM Band Operation
• IEEE 802.11g/b Compatible (54Mbps OFDM and 11Mbps CCK)
• Complete RF Transceiver, PA, and Crystal Oscillator (MAX2831)
• Best-in-Class Transceiver Performance
• 62mA Receiver Current
• 2.6dB Rx Noise Figure
• -76dBm Rx Sensitivity (54Mbps OFDM)
• No I/Q Calibration Required
• 0.1dB/0.35° Rx I/Q Gain/Phase Imbalance
• 33dB RF and 62dB Baseband Gain Control Range
• 60dB Range Analog RSSI per RF Gain Setting
• Fast Rx I/Q DC-Offset Settling
• Programmable Baseband Lowpass Filter
• 20-Bit Sigma-Delta Fractional-N PLL with <20Hz Step Size
• Digitally Tuned Crystal Oscillator
• +18.5dBm Transmit Power (5.6% EVM with 54Mbps OFDM)
• 31dB Tx Gain Control Range
• Integrated Power Detector (MAX2831)
• Serial or Parallel Gain-Control Interface

• 40dB Tx Sideband Suppression without Calibration

• Tx/Rx I/Q Error Detection
• Transceiver Operates from +2.7V to +3.6V
• PA Operates from +2.7V to +4.2V (MAX2831)
• Low-Power Shutdown Mode
• Small 48-Pin TQFN Package (7mm x 7mm x 0.8mm)

Applications

• Wi-Fi
• PDA
• VOIP
• Cellular Handsets
• Wireless Speakers and Headphones
• General 2.4GHz ISM Radios