Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com
103242B Skyworks Proprietary and Confidential information Products and Product Information are Subject to Change Without Notice November 29, 2004
1
PRODUCT SUMMARY
SKY74963: RF Transceiver With Power Ramping Controller
and Integrated Crystal Oscillator for Multi-Band GSM, GPRS,
and EDGE Applications
Applications
GSM850, EGSM900, DCS1800, and PCS1900 handsets
GPRS handsets and modules
EDGE downlink support
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 DCOC sequencer
Reduced filtering requirements with translational loop transmit
architecture
Integrated transmit VCOs
Wide RF range for multi-band operation
Integrated PAC loop
Single integrated, fully programmable fractional-N synthesizer
suitable for multi-slot GPRS operation
Fully integrated wideband UHF VCO
26 MHz integrated crystal oscillator with 26 MHz output
(SKY74963-23) or 13 MHz output (SKY74963-32) options
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 ADCs for current savings
Interfaces to low dynamic range ADC
Meets AM suppression requirements without baseband
interaction
Low power standby mode
RFLGATM (56-pin, 8 x 8 mm) Pb-free package (MSL3, 260 C
per JEDEC J-STD-020)
Description
The SKY74963 RF 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 SKY74963 supports GSM850,
EGSM900, DCS1800, and PCS1900 applications. The receiver
also supports Enhanced Data for GSM Evolution (EDGE) downlink
applications.
The receive path implements a direct down-conversion
architecture that eliminates the need for Intermediate Frequency
(IF) components. The SKY74963 consists of three integrated Low
Noise Amplifiers (LNAs), a quadrature demodulator, tunable
receiver baseband filters, and a DC Offset Correction (DCOC)
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 SKY74963 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.
A functional block diagram is provided in Figure 1.
Skyworks offers lead (Pb)-free "environmentally
friendly" packaging that is RoHS compliant
(European Parliament for the Restriction of
Hazardous Substances).
PRODUCT SUMMARY SKY74963
Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com
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November 29, 2004 Skyworks Proprietary and Confidential information Products and Product Information are Subject to Change Without Notice 103242B
PA GAIN CONTROLLER
OFFSET
GEN
DET
VCC
BBVAPC
PDET
PDETVCC
PAVAPC
TXIN
TXIP
TXQN
TXQP
Tx PATH
Synthesizer
TXINP
TX900
TX1800/TX1900
XTALTUNE
XTAL
Frac-N
LO
UHFTUNE
UHFCPO
C900
Indicates
Off-chip
GSM
LNA
DCS
LNA
PCS
LNA
Receive Path
VGA1
VGA2
VGA2
LNA900IN
LNA1800IN
LNA1900IN
CAPIP
CAPIN
CAPQP
CAPQN
RXIP
RXIN
RXQP
RXQN
DCOC
VGA1
DCOC
DCOC
DCOC
DCOC
DCOC
+
D1
PFD
TXVCOTUNE
TXCPO
FILTN
FILTP
TxIFP
TxIFN
GSM850/EGSM900
DCS1800/PCS1900
D2
CP
+
XTALBUF
PCO
VCXO_EN
LE
DATA
CLK
Figure 1. SKY74963 RF Transceiver Block Diagram
Ordering Information
Model Name
Manufacturing Part Number
Product Revision
SKY74963 RF Transceiver
SKY74963-23 (26 MHz output, Pb-free package)
SKY74963-32 (13 MHz output, Pb-free package)
Copyright 2004 Skyworks Solutions, Inc. All Rights Reserved.
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used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials. Skyworks may make changes to its documentation, products,
specifications and product descriptions at any time, without notice. Skyworks makes no commitment to update the information and shall have no responsibility whatsoever for conflicts,
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The following are trademarks of Skyworks Solutions, Inc.: Skyworks, the Skyworks logo, and Breakthrough Simplicity. Product names or services listed in this publication are for identification
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