CX74063 Datasheet, PDF (1/2 Pages) Skyworks Solutions Inc. – RF Transceiver for Multi-Band GSM/GPRS/EDGE Applications with Integrated Crystal Oscillator and Power Ramping Controller

CX74063
RF Transceiver for Multi-Band GSM/GPRS/EDGE Applications with
Integrated Crystal Oscillator and Power Ramping Controller
The CX74063 transceiver 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 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 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 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 CX74063 is available as a 56-pin RFLGA™ 8x8 mm package. Package
dimensions are shown in Figure 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/PCS = 22 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 power standby mode
Applications
• GSM850, EGSM900, DCS1800, and PCS1900
handsets
• GPRS handsets and modules
• EDGE downlink support
Product Summary
Skyworks – Preliminary
Proprietary Information and Specifications Are Subject to Change
103008A
August 22, 2002