TRF2443 Datasheet, PDF (1/72 Pages) Texas Instruments – Integrated IF Transceiver for Broadband Wireless Applications

TRF2443
www.ti.com ................................................................................................................................... SLWS217A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009
Integrated IF Transceiver for Broadband Wireless Applications
FEATURES
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• Integrated TX Chain (165–175 MHz / 330–350
MHz)
– Baseband Amplifiers
– Quadrature Modulator
– Digitally Controlled VGA
– TX Output IP3: 29.5 dBm
– TX Output Noise: –166 dBc/Hz
• Integrated RX Chain (140–165 MHz / 280–330
MHz)
– IF Amplifiers
– Analog and Digital VGA
– Quadrature Demodulator
– Baseband Filters
– ADC Buffers
– IF SAW Filter Bypass
– RX Noise Figure: 4.3 dB
– RX Input IP3: 9.5 dBm
• Integrated TX and RX Synthesizers
• Integrated Cross-Polarization Interference
Cancellation (XPIC) Support
• Auxiliary RX Chain
APPLICATIONS
• Wireless Microwave Backhaul
• Point-to-Point Microwave
• Broadband Wireless Applications
• WiMAX IF Transceiver
DESCRIPTION
The TRF2443 is a highly integrated full-duplex
intermediate frequency (IF) transceiver designed for
broadband point-to-point wireless communications
applications. The receiver chain integrates a
quadrature (IQ) demodulator and provides more than
90 dB of gain range, obtained via a combination of
analog- and digital-controlled VGAs. The integrated
programmable baseband low-pass filter gives the
TRF2443 the flexibility to receive signals with different
bandwidths, while also helping to remove interferer
signals before they reach the ADC. Additionally, the
TRF2443 gives the flexibility to add an external IF
filter to further remove unwanted signals. The
TRF2443 transmitter chain integrates a quadrature
(IQ) modulator driving a highly linear IF DVGA that
provides 35 dB of gain range controlled via a serial
programming interface (SPI). The TRF2443 includes
the two synthesizers for the receiver and transmitter
chains, removing the need for external LO generation
circuitry and simplifying the implementation of a
frequency-division duplexing (FDD) transceiver
design. The TRF2443 also provides
cross-polarization interference cancellation (XPIC)
support via an integrated XPIC output amplifier and
receiver chain. The TRF2443 is an ideal building
block for implementing the IF transceiver function in
the indoor unit (IDU), which is connected via a coaxial
cable interface to the outdoor unit (ODU), of a
point-to-point microwave backhaul split-architecture
system.
IF SAW
RXAGC
IF_OUT
XPIC
XPIC
IF_IN
OUT XPIC_IN
AGC
AGC
CNTL
RX_IN
TEMPOUT
VCCs
TX_OUT
GNDs
IFAMP
Temperature
Sensor
From SPI
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TX VGA
RX VGA
0/90
from RXPLL
0/90
RXPLL
Level
Detect
TXPLL
0/90
XPIC_BBI
XPIC_BBQ
RXBBI
RXBBQ
S
CLKSPI
P
DATASPI
I 3 LESPI
TXI_IN
TXQ_IN
TX_PWD
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated