ANALOG DEVICES AD9354 Service Manual

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WiMAX/WiBro RF MxFE

FEATURES

RF transceiver with integrated ADCs and DACs IEEE 802.16 WiMAX/WiBro Dual receivers, single transmitter Operating band: 2.3 GHz to 2.7 GHz

3.5 MHz < BW < 10 MHz Superior receiver sensitivity with NF < 3.5 dB Manual Rx gain or autonomous AGC mode Highly linear and spectrally pure transmitter Tx EVM = −38 dB Tx noise floor < −134 dBm/Hz at f Tx power control range of 58 dB, resolution of 0.25 dB Integrated fractional-N synthesizer 10 Hz LO step size LO integrated phase noise < 0.4°rms Automatic frequency correction < 0.012 ppm Industry-standard JESD-207 digital interface

APPLICATIONS

BWA/WiM AX/WiBro

CPEs

USB dongles/minicards Pico and femto base stations Proprietary radio systems

GENERAL DESCRIPTION

The AD9354 is a radio frequency (RF) transceiver with a single transmitter and dual receivers fully integrated into the device. This allows the part to be used for mobile and fixed WiMAX/WiBro wireless network systems. By incorporating an RF MxFE™, the AD9354 offers the combination of an RF front end and a mixedsignal baseband, enabling an easy-to-use JESD-207-compliant digital interface to the baseband application-specific integrated circuit (ASIC) or field-programmable gate array (FPGA). In addition, the AD9354 operates in the 2.3 GHz to 2.7 GHz range, covering most of the licensed and unlicensed bands. Channel bandwidths of 3.5 MHz, 4.375 MHz, 5 MHz, 7 MHz, 8.75 MHz, and 10 MHz are supported.

The direct-conversion receivers have state-of-the-art noise figure (NF) and linearity and, with the exception of baluns, do not require external components. The complete RF subsystem integrates autonomous automatic gain control (AGC) loops and dc offset corrections, thus eliminating the need for high speed interaction with the baseband processor.

The received signal is digitized with a set of four analog-to-digital converters (ADCs) with high dynamic range. Decimation and

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Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.

OFFSET

> 22 MHz

MISO Transceiver

AD9354

FUNCTIONAL BLOCK DIAGRAM

AD9354

RX1_N, RX1_P

RX2_N, RX2_P

PW_DET

TX_N, TX_P

SWITCHING*

(GPO0 TO GPO3)

SPI PORT

*RADIO SWI T CHI NG IS ONE POS SIBLE USE FO R THE GPO PI NS .

RADIO

GPO

LDOs

CTRL

CTRL_OUT[1:0] AUXADC AUXDAC

Figure 1.

channel filters produce a 10-bit output signal at the appropriate sample rate determined by the bandwidth mode. The transmit path interpolates 10-bit input data before converting it to the analog domain, and then upconverting it to the carrier frequency.

The highly linear transmit path has excellent spectral purity with sideband noise less than −134 dBm/Hz at 22 MHz offset, and it offers an error vector magnitude (EVM) of −38 dB at 0 dBm output power. The transmit power is detected by an accurate power detector with a range of more than 40 dB and

0.5 dB steps. The output power can be calibrated at the factory by a single measurement.

The reference frequency is produced by an internal digitally controlled crystal oscillator (DCXO) that has a programmable frequency offset correction with a resolution of 0.012 ppm, thus reducing the total bill of materials (BOM) of the device.

An internal auxiliary ADC and an auxiliary digital-to-analog converter (DAC) 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 userdefined state machine. Mode control is via a 3- or 4-wire serial port and four real-time I/O control pins. The AD9354 is powered either from a single 3.3 V supply or, for power savings, from dual supplies and contains on-chip low dropout (LDO) regulators. The AD9354 is packaged in an 8 mm × 8 mm, 56-lead lead frame chip scale package (LFCSP).

ADC

DAC

FILTER FILTER FILTER

SYNTH

DATA INTERF ACE

TXNRX

D[9:0]

DATA_CLK

DV/FB_CLK

REFCLK

XTALP XTALN

07602-001

AD9354

NOTES

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