CX74004 Просмотр технического описания (PDF) - Conexant Systems
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CX74004 Datasheet PDF : 2 Pages
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wireless communications products
Silicon Germanium Dual-Band
LNA/Downconverter RFlC
CX74004
Conexant Delivers RF Chipsets
for 2G and 3G CDMA Applications
The CX74004 is a tri-mode, dual-band LNA/downconverter
designed in Conexant’s advanced SiGe process. The device meets
and exceeds cdmaOne, cdma2000, and AMPS requirements for
U.S. and Korean cellular, Japan cellular, U.S. PCS and Korean
PCS markets. The CX74004 can also be optimized for dual-mode
GSM/wideband CDMA (WCDMA) applications in the GSM and
IMT-2000 bands.
Employing silicon germanium (SiGe) bipolar complementary
metal oxide semiconductor (BiCMOS) process technology, the
RFIC is designed for low current consumption at a high perform-
ance. By utilizing the advanced process, standby times are up to
15 percent longer than with previous generation of devices.
The CX74004 is a super—heterodyne receiver incorporating all
the components required for implementing the receiver front end,
except for the RF SAW filters. It has two internal low noise ampli-
fiers (LNAs) — one for the cellular band and another for the PCS
or IMT– 2000 band.
The CX74004, along with Conexant’s CX74002 Transmit RFIC,
CX74005 VGA + I/Q demodulator, a Conexant power amplifier
module, and Conexant’s baseband analog processor forms a
complete RF subsystem that interfaces with the most common
cdma baseband devices.
Distinguishing Features
• Tri-mode, dual-band functionality
• Battery-cell operation
(2.7V < VCC < 3.6V)
• PCS bypass LNA NF=1.9 dB typical
• Three -step cellular LNA NF=1.8 dB typical
• 5mm x 5mm land grid array (LGA)
chipscale package
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