sky74219-21 Skyworks Solutions, Inc., sky74219-21 Datasheet

sky74219-21

Manufacturer Part Number

sky74219-21

Description

Sky74219-21 Rf Transceiver With Analog I/q Interface For Quad-band Gsm, Gprs, And Edge Femto Base Station Applications

Manufacturer

Skyworks Solutions, Inc.

Datasheet

1.SKY74219-21.pdf (2 pages)

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PRODUCT SUMMARY

SKY74219-21: RF Transceiver with Analog I/Q Interface for

Quad-Band GSM, GPRS, and EDGE Femto Base Station

Applications

• GSM850, EGSM900, DCS1800, and PCS1900 femtocell base

• GPRS femtocell base stations and cellular repeaters

• EDGE femtocell base stations and cellular repeaters

Features

• General:

• Synthesizer:

• Transmit:

• Receive:

stations and cellular repeaters

− Low external component count

− Supports multi-slot GPRS and EDGE applications

− Low power operation

− Additional auxiliary system clock

− Simplified control interface with channel number

− Dual-row RFLGA™ (36-pin, 4 x 4.5 mm) Pb-free (MSL3,

− Single integrated, fully programmable fractional-N synthesizer

− Fully integrated wideband UHF VCO

− Crystal oscillator with hybrid digital/analog control

− Closed Polar Loop™ transmitter

− No delay adjustment required

− Integrated quad-band transmit VCO

− PA saturation detection and prevention circuit

− Direct conversion receiver

− Four separate LNAs with differential inputs

− Gain selectable in 6 dB steps

programming

250 °C per JEDEC J-STD-020) package

suitable for multi-slot EGPRS operation

Skyworks offers lead (Pb)-free RoHS (Restriction of

Hazardous Substances) compliant packaging.

200925A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • July 10, 2008

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

Description

The SKY74219-21 Transceiver is a highly integrated device

designed for Skyworks GSM/EDGE Femto Base Station RF

Subsystem. This subsystem is intended for quad-band GSM,

GPRS, and EDGE femtocell base stations and cellular repeaters.

The device supports the GSM850, EGSM900, DCS1800, and

PCS1900 bands.

The receiver consists of four integrated Low Noise Amplifiers

(LNAs), a quadrature demodulator, and baseband filters.

The timing and control section of the SKY74219-21 generates a

26 MHz high-stability clock for use on-chip and a 26 MHz signal

(SYSCLK) supplied to the baseband. An additional reference clock

is also available.

The SKY74219-21 implements Skyworks closed Polar Loop

transmit architecture. This architecture, while maintaining the

traditional analog In-Phase and Quadrature (I/Q) signals,

autonomously splits the amplitude and phase within the device.

The filter-saving advantage of the translation-loop approach is

embedded in the architecture. Also included is an AM loop that

provides both signal AM and power level control.

The SKY74219-21 features an integrated, fully programmable,

Σ∆ fractional-N synthesizer suitable for EGPRS multi-slot

operation. The reference frequency for the synthesizer is supplied

by an integrated crystal oscillator circuit that enables the use of a

low-cost crystal. This circuit provides both digital and analog

tuning – coarse digital tuning for factory calibration and analog

voltage tuning for Automatic Frequency Correction (AFC). The

crystal oscillator circuit also provides a buffered reference

frequency output to supply other devices in the system.

The SKY74219-21 is intended to be used with Skyworks

SKY65330 Front-End Module (FEM), which contains a switch, PA,

and an integrated coupler for use with Skyworks closed Polar

Loop EDGE architecture. Together, the transceiver and FEM form

the GSM/EDGE Femto Base Station RF Subsystem.

The SKY74219-21 is packaged in a small, 36-pin 4 x 4.5 mm

dual-row RF Land Grid Array (RFLGA) package. A functional block

diagram is shown in Figure 1.

Related parts for sky74219-21

sky74219-21 Summary of contents

Page 1

... Skyworks closed Polar Loop EDGE architecture. Together, the transceiver and FEM form the GSM/EDGE Femto Base Station RF Subsystem. The SKY74219-21 is packaged in a small, 36-pin 4 x 4.5 mm dual-row RF Land Grid Array (RFLGA) package. A functional block diagram is shown in Figure 1. ...

Page 2

... Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 2 July 10, 2008 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 200925A Figure 1. SKY74219-21 RF Transceiver Block Diagram Manufacturing Part Number SKY74219-21 (Pb-free package) ...

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