Low Power RF Transceiver
Wed, 10/17/2007 - 6:36am
Maxim Integrated Products introduces its MAX2830 single-chip, direct-conversion, low power 802.11g/b RF transceiver with integrated power amplifier, Rx/Tx/antenna diversity switches and crystal oscillator circuitry. Its small size makes it well suited for Wi-Fi, PDA, VoIP and cellular handset applications. It also integrates digitally controlled crystal oscillator (DCXO) circuitry to implement the reference oscillator function, allowing the use of small, low-power crystals. The transceiver operates from a 2.7 to 3.6 V supply, and the PA operates from 2.7 to 4.2 V which allows the device to be powered directly from cell phone batteries. The receiver consumes 62 mA of current in receive mode while achieving a low noise figure of 3.3 dB, enabling receive sensitivity of -75 dBm (64QAM OFDM) without an external LNA.