PRODUCT SUMMARY
SKY74117-13: RF Transceiver for Multi-Band GSM, GPRS, and
EDGE Applications
Applications
Description
The SKY74117-13 RF transceiver is a highly integrated device for
multi-band Global System for Mobile Communications (GSM),
General Packet Radio Service (GPRS), and/or Enhanced Data Rate
for GSM Evolution (EDGE) receive applications. The device
supports GSM850, EGSM900, DCS1800, and PCS1900
applications.
• GSM850, EGSM900, DCS1800, and PCS1900 handsets
• GPRS handsets and modules
• EDGE receive handsets and modules
Features
The receive path implements a direct down-conversion
architecture that eliminates the need for Intermediate Frequency
(IF) components. The device consists of four integrated Low Noise
Amplifiers (LNAs), a quadrature demodulator, selectable receiver
baseband filter bandwidths, low droop DC Offset Correction
(DCOC) sequencer, and integrated 2nd order Intercept Point (IP2)
calibration circuitry.
• Direct down-conversion transceiver eliminates the external
image reject/IF filters
• Integrated LDO voltage regulators for direct connection to
battery
• Four separate LNAs with single-ended inputs
• Gain selectable in 2 dB steps
Similar to its predecessors, Skyworks innovative DCR™
architecture allows for this highly integrated device to be
combined with virtually any standard GSM/EGPRS baseband
without requiring any special processing interfaces.
• Integrated receive baseband filtering with programmable
bandwidth
• Integrated low droop DCOC sequencer
• Integrated IP2 calibration
The device uses a translation loop transmit architecture. This
architecture consists of an In-phase and Quadrature (I/Q)
modulator and a frequency translation loop to perform frequency
up-conversion with high output spectral purity. The translation
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.
• Multiplexed and non-multiplexed I/Q input and output lines
• Integrated loop filters
• Integrated quad-band transmit VCOs
• Single integrated, fully programmable fractional-N synthesizer
suitable for multi-slot EGPRS operation
The SKY74117-13 also features an integrated, fully
• Fully integrated wideband UHF VCO
programmable, sigma-delta fractional-N synthesizer suitable for
EGPRS multi-slot operation. The reference frequency for the
synthesizer is supplied by an integrated Voltage Controlled Crystal
Oscillator (VCXO) circuit that enables the use of a low-cost crystal.
The VCXO also provides a buffered reference frequency output to
supply other devices in the system.
• Integrated crystal oscillator maintaining amplifier with
sinusoidal output buffer
• Digital crystal oscillator center frequency control
• Automatic frequency control possible with fractional-N
synthesizer
The SKY74117-13 is packaged in a small, 40-pin 6 x 6 mm RF
Land Grid Array (RFLGA™) package. A functional block diagram is
shown in Figure 1.
• Low power standby mode
• Separate enable lines for transmit, receive, and synthesizer
• Band selection possible with the three-wire interface
• Four, fully programmable GPOs to control any antenna switch
module
Skyworks offers lead (Pb)-free “environmentally
friendly” packaging that is RoHS compliant
(European Parliament for the Restriction of
Hazardous Substances).
• Low external component count
• Interfaces to low dynamic range receive ADC
• Meets AM suppression requirements without baseband
interaction
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200152A • Skyworks Proprietary and Confidential information • Products and product information are subject to change without notice • March 16, 2005
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