SKY77910_11 Datasheet, PDF (1/2 Pages) Skyworks Solutions Inc. – Eight low insertion loss - high linearity TRx switch ports

PRODUCT SUMMARY
SKY77910-11 SkyLiTE^™ Tx-Rx FEM for Quad-Band GSM /
GPRS EDGE w/ Eight Linear TRx Switch Ports, Dual-Band
TD-SCDMA, and TDD LTE Band 39
Applications
• Cellular handsets encompassing Quad-Band GSM/EDGE,
Dual-Band TD-SCDMA, and TDD LTE
- Class 4 GSM850/900
- Class 1 DCS1800/PCS1900
- Class 12 GPRS multi-slot operation
- Linear EDGE operation
- TD-SCDMA Bands 34/39
- TDD LTE Band 39
Features
• Small, low profile package
- 5.5 mm x 5.3 mm x 0.8 mm
- 38-pad configuration
• Fully programmable MIPI^® RFFE control
• Eight low insertion loss / high linearity TRx switch ports
• Integrated noise suppression notch filter for WiFi
coexistence
• Built-in IEC-compliant antenna ESD protection
• Integrated broadband directional coupler
• High Efficiency (inclusive of coupler)
- 40% GSM850 36% DCS1800
- 40% GSM900 36% PCS1900
• Wide GMSK input power range: –1 dBm to 6 dBm
• Tx-VCO-to-antenna and antenna-to-Rx-SAW filter RF
interface
• Tx harmonics below –40 dBm
• Current limiting and over-voltage protection for
ruggedness and extended battery life
• Input/Output ports internally matched to 50 Ω load
• High impedance control inputs: 20 µA, maximum
• Power control circuitry built-in for improved TRP variation
Description
SkyLiTE^™ is Skyworks’ newest family of LTE devices which consists of
highly integrated modules incorporating the amplification, switching, WiFi
filtering and coupler functions required to support all major FDD/TDD
bands. With the addition of external duplexers, this product family provides
OEMs with a scalable and reconfigurable front-end system suitable for
markets worldwide.
Design of the SKY77910-11 SkyLiTE^™ Transmit / Receive Front End Module
(FEM) offers a complete transmit VCO-to-Antenna and Antenna-to-receive
SAW filter solution for advanced cellular handsets comprising quad-band
GSM and linear 2.5G operation in a very low profile (0.9 mm) and compact
form factor.
The FEM supports Class 12 General Packet Radio Service (GPRS), EDGE
multi-slot operation, and TD-SCDMA and TDD LTE linear transmission.
Eight transmit / receive (TRx) ports and an integrated directional coupler
enables broadband 3G/4G RF switch-through.
The module consists of a CMOS Power Amplifier (PA) Controller, a low band
(LB) PA block supporting GSM850/900 bands, a high band (HB) PA block
supporting DCS1800/PCS1900, TD-SCDMA bands 34/39 and TDD LTE band
39, input and output ports internally matched to 50 ohm impedance loads,
Tx harmonic filtering, RF switching, and a directional coupler at the antenna
output. The custom low-current PA controller includes the Mobile Industry
Processor Interface (MIPI^®) and decoder circuitry to control the RF switch.
All RF ports Internal matched to a 50 ohm load reduces the external
components on the phone board. The Heterojunction Bipolar Transistor
(HBT) PA blocks, fabricated in GaAs, share common power supply pads to
distribute current. Extremely low leakage current of the SKY77910-11
maximizes handset standby time. The PA outputs and the eight TRx pads
connect to the antenna pad through a high-linearity, low-loss switch. The
TRx ports feature a 0 volts DC offset level that eliminates external blocking
capacitors. An integrated directional coupler precludes any external coupler
requirement. The GaAs die, the switch die, the CMOS controller, and the
passive components mount onto a multi-layer laminate substrate and the
entire assembly encapsulated with plastic overmold. MIPI controls the RF
signal flows including mode control and selection of LB or HB PA or TRx
port.
In GMSK modes, the PA controller provides envelope amplitude control as a
function of VRAMP and reduces sensitivity to input drive, temperature,
power supply, and process variations. Skyworks’ Finger-Based Integrated
Power Amplifier Control (FB-iPAQ) minimizes output power variation into
mismatch. Proper timing of MIPI commands and VRAMP input ensures high
isolation between the antenna and Tx-VCO while the VCO is being tuned
prior to the transmit burst.
In EDGE and TD-SCDMA / TDD LTE linear modes, VRAMP voltage and MIPI-
based bias settings optimize PA linearity and efficiency.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
203394C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 23, 2015
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