DATA SHEET
CX74063-3x: RF Transceiver with Power Ramping Controller
and Integrated Crystal Oscillator with 13 MHz Output for
Multi-Band GSM, GPRS, and EDGE Applications
APPLICATIONS
•
GSM850, EGSM900, DCS1800, and PCS1900 handsets
•
GPRS handsets and modules
•
EDGE downlink support
DESCRIPTION
The CX74063-3x transceiver (including –34, -35, and –36
package options) is a highly integrated device for multi-band
Global System for Mobile Communications™ (GSM™) or
General Packet Radio Service (GPRS) applications. The device
requires a minimal number of external components to
complete a GSM radio subsystem. The CX74063-3x supports
GSM850, EGSM900, DCS1800, and PCS1900 applications. The
receiver also supports downlink Enhanced Data-Rate GSM
Evolution (EDGE).
The receive path implements a direct down-conversion
architecture that eliminates the need for Intermediate
Frequency (IF) components. The CX74063-3x receiver consists
of three integrated Low Noise Amplifiers (LNAs), a quadrature
demodulator, tunable receiver baseband filters, and a DC-
offset correction sequencer.
In the transmit path, the device consists of an In-phase and
Quadrature (I/Q) modulator within a frequency translation loop
designed to perform frequency up-conversion with high output
spectral purity. This loop also contains a phase-frequency
detector, charge pump, mixer, programmable dividers, and
high power transmit Voltage Controlled Oscillators (VCOs) with
no external tank required. With the integrated gain controller
(and an integrator ), the device realizes the Power Amplifier
Control (PAC) functionality when combined with a coupler, a
Radio Frequency (RF) detector and a Power Amplifier (PA).
The CX74063-3x also features an integrated, fully
programmable, sigma-delta fractional-N synthesizer suitable
for GPRS multi-slot operation. Except for the loop filter, the
frequency synthesizer function, including a wideband VCO, is
completely on-chip. The reference frequency for the
synthesizer is supplied by the integrated crystal oscillator
circuitry.
The 56-pin 8x8 RF Land Grid Array (RFLGA™) device package
and pin configuration are shown in Figure 1. A functional block
diagram is shown in Figure 2. Signal pin assignments,
functional pin descriptions, and equivalent circuitry are
provided in Table 1.
FEATURES
•
Direct down-conversion receiver eliminates the external
image reject/IF filters
•
Three separate LNAs with single-ended inputs
•
RF gain range: GSM = 20 dB, DCS = 22 dB,
PCS = 20 dB. Baseband gain range = 100 dB
•
Gain selectable in 2 dB steps
•
Integrated receive baseband filters with tunable bandwidth
•
Integrated DC offset correction sequencer
•
Reduced filtering requirements with translational loop
transmit architecture
•
Integrated transmit VCOs
•
Wide RF range for quad band operation
•
Integrated PAC loop
•
Single integrated, fully programmable fractional-N
synthesizer suitable for multi-slot GPRS operation
•
Fully integrated wideband Ultra High Frequency (UHF) VCO
•
Integrated crystal oscillator
•
Separate enable lines for power management transmit,
receive, and synthesizer modes
•
Supply voltage down to 2.6 V
•
Band select and front-end enable states may be exercised
on output pins to control external circuitry.
•
Low external component count
•
Optional bypass of baseband filtering for use with high
dynamic range Analog to Digital Converters (ADCs) for
current savings
•
Interfaces to low dynamic range ADC
•
Meets AM suppression requirements without baseband
interaction.
•
56-pin RFLGA 8x8 mm package (low temperature option,
CX74063-34; high temperature option, CX74063-35 and
CX74063-36)
•
Low power standby mode
Skyworks Solutions, Inc., Proprietary and Confidential
103116C
[781] 376-3000 I FAX [781] 376-3100 I SALES@SKYWORKSINC.COM I WWW.SKYWORKSINC.COM
1
NOVEMBER 25, 2003
SKYWORKS [ SKYWORKS SOLUTIONS INC. ]
