WiMAX/WiBRO RF MxFE™ MISO Transceiver
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The AD9354 is a fully integrated dual receiver, single transmitter for mobile and fixed WiMAX /WiBRO wireless network systems. The RF MXFE combines the RF front-end with mixed-signal base-band enabling an easy-to-use digital interface ADI/Q™ to the base-band ASIC or FPGA. The AD9354 operates in the 2.3 to 2.7 GHz range. Channel bandwidths of 3.5, 4.375, 5, 7, 8.75, and 10 MHz are supported.
The direct-conversion receivers have state-of-the-art noise figure and linearity and require no external components with the exception of baluns. The complete RF sub-system integrates autonomous AGC loops and DC offset corrections, thus eliminating the need for high-speed interaction with the base-band processor.
The received signal is digitized with a set of four high dynamic range ADCs. Decimation and channel filters produce a 10-bit output signal at the appropriate sample rate determined by the bandwidth mode. The transmit path takes a 10-bit input data and interpolates before converting to the analog domain and up-converting to the carrier frequency.
The highly linear transmit path has excellent spectral purity with side-band noise less than -134 dBc/Hz at 22 MHz offset and offers EVM of -38 dB at 0 dBm output power. The transmit power is detected by an accurate power detector with a range of 58 dB and 0.25 dB steps. The output power can be calibrated at the factory by a single measurement.
The reference frequency is produced by an internal crystal oscillator with digital programmable frequency with 0.012 ppm resolution thus reducing the total BOM of the device.
An internal auxiliary ADC, an auxiliary DAC, and temp sensor are available for system monitoring and control. Four general purpose I/Os are also included and can be register programmed or automatically sequenced by a user-defined state machine. Mode control is via a 4-wire serial port and 4 real-time I/O control pins. The AD9354 is powered from a single 3.3V supply and contains on chip LDO's. The AD9354 is packaged in an 8 x 8 mm, 56 lead LFCSP.
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All products in this family will be obsolete soon. Please contact ADI Sales or Distributors to arrange for final purchases and read our Obsolescence Information to review the time periods for placing final orders and receiving final shipments.
RF Source Booklet
RF IC Product Overview
Expanding the Role of WiMAX CPE Transceivers into Base Station Applications
By Patrick Wiers, Analog Devices (RF Designline, 8/2008)
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