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PDF SKY74963 Data sheet ( Hoja de datos )
| Número de pieza | SKY74963 | |
| Descripción | RF Transceiver With Power Ramping Controller and Integrated Crystal Oscillator | |
| Fabricantes | Skyworks Solutions | |
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PRODUCT SUMMARY
SKY74963: RF Transceiver With Power Ramping Controller
and Integrated Crystal Oscillator for Multi-Band GSM, GPRS,
and EDGE Applications
Applications
Description
• GSM850, EGSM900, DCS1800, and PCS1900 handsets
The SKY74963 RF transceiver is a highly integrated device for
• GPRS handsets and modules
multi-band Global System for Mobile Communications (GSM) or
• EDGE downlink support
General Packet Radio Service (GPRS) applications. The device
requires a minimal number of external components to complete a
Features
GSM radio subsystem. The SKY74963 supports GSM850,
EGSM900, DCS1800, and PCS1900 applications. The receiver
• Direct down-conversion receiver eliminates the external image
also supports Enhanced Data for GSM Evolution (EDGE) downlink
reject/IF filters
applications.
• Three separate LNAs with single-ended inputs
• RF gain range: GSM = 20 dB, DCS = 22 dB, PCS = 20 dB.
The receive path implements a direct down-conversion
architecture that eliminates the need for Intermediate Frequency
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
(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.
architecture
In the transmit path, the device consists of an In-phase and
• Integrated transmit VCOs
DataSheet4QUu.acdoramture (I/Q) modulator within a frequency translation loop
• Wide RF range for multi-band operation
designed to perform frequency up-conversion with high output
• Integrated PAC loop
spectral purity. This loop also contains a phase-frequency
• Single integrated, fully programmable fractional-N synthesizer
detector, charge pump, mixer, programmable dividers, and high
suitable for multi-slot GPRS operation
power transmit Voltage Controlled Oscillators (VCOs) with no
• Fully integrated wideband UHF VCO
external tank required. With the integrated gain controller (and an
• 26 MHz integrated crystal oscillator with 26 MHz output
integrator ), the device realizes the Power Amplifier Control (PAC)
(SKY74963-23) or 13 MHz output (SKY74963-32) options
functionality when combined with a coupler, a Radio Frequency
• Separate enable lines for power management transmit, receive, (RF) detector, and a Power Amplifier (PA).
and synthesizer modes
The SKY74963 also features an integrated, fully programmable,
• Supply voltage down to 2.6 V
sigma-delta fractional-N synthesizer suitable for GPRS multi-slot
• Band select and front-end enable states may be exercised on
operation. Except for the loop filter, the frequency synthesizer
output pins to control external circuitry
function, including a wideband VCO, is completely on-chip. The
• Low external component count
reference frequency for the synthesizer is supplied by the
• Optional bypass of baseband filtering for use with high dynamic integrated crystal oscillator circuitry.
range ADCs for current savings
• Interfaces to low dynamic range ADC
A functional block diagram is provided in Figure 1.
• Meets AM suppression requirements without baseband
interaction
Skyworks offers lead (Pb)-free “environmentally
• Low power standby mode
friendly” packaging that is RoHS compliant
• RFLGA™ (56-pin, 8 x 8 mm) Pb-free package (MSL3, 260 °C
(European Parliament for the Restriction of
per JEDEC J-STD-020)
Hazardous Substances).
DataShee
DataSheet4U.com
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
103242B • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • November 29, 2004
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