improve the indispensable communication tools we all use every day.
continually reducing complexity, cost and board-space requirements.
required between the IF output from QCT鈥檚 RFR3100鈩?or RFR3300鈩?/div>
Rx front-end devices and at baseband with Mobile Station Modem
(MSM鈩? devices for IS-95 CDMA-only and ARIB-53 (Japan) J-CDMA
applications. The IFR3500 device leverages previous IFR3300鈩?circuit
designs, including GPS, and provides significant advantages in size and
cost for single-mode CDMA or single-mode plus gpsOne鈩? enabled
handsets. In conjunction with RFR3100 or RFR3300 devices, a
complete two-chip Rx radio implementation for CDMA handsets with
GPS position location capability is realized with minimum circuitry.
The IFR3500 device includes IF AGC amplifiers, IF VCO, selectable
frequency divider for IF LO, a quadrature IF-to-baseband downconverter,
in-phase (I) and quadrature (Q) baseband filters, and Analog-to-Digital
Converters (ADCs). Used in conjunction with QCT鈥檚 RFT3500鈩?device,
the IFR3500 device accommodates sharing of the IF LO synthesizer to
enable simplified frequency plans and reduced cost.
The range of supply voltage is from 2.7 V to 3.0 V,
which provides operating compatibility for platforms
utilizing a single-cell Li-Ion battery design. CDMA
and GPS mode selection, gain control, IF LO
frequency divide, and selective power-down modes
which permit optimized power savings are controlled
directly from the MSM device and system software. The IFR3500 device
is provided in a 32-pad BCC++ plastic package that includes an
exposed center ground slug for improved RF grounding, mechanical
strength, and thermal continuity.
As with all QCT products, the IFR3500 device features the unparalleled
customer support you have come to expect from your partner of choice
for complete wireless communications solutions. QCT is committed to
providing innovative multi-mode, multi-network chipsets, system software
and development tools that will help ensure your competitive success in
the wire-less communications marketplace for 3G and beyond.
Features
鈥?Dual-mode operation includes CDMA and GPS
鈥?Rx digital baseband interface compatible with MSM3100鈩?
MSM3300鈩? MSM5105鈩? MSM5100鈩? and MSM5500鈩?devices
鈥?IF LO synthesizer can be shared between IFR3500 and RFT3500
devices for easier frequency planning and reduced cost
鈥?Rx power control through 90 dB dynamic range VGA
鈥?IF mixer for down-converting IF to analog baseband for CDMA and
GPS
Q U A L C O M M , I N C O R P O R AT E D
CDMA TECHNOLOGIES
5775 MOREHOUSE DRIVE
SAN DIEGO, CA 92121
T (858) 658-5005
F (858) 658-1556
cdma-technologies@qualcomm.com
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