SKY77928-11 Datasheet, PDF (1/2 Pages) Skyworks Solutions Inc. – Tx-Rx Front-End Module for Quad-Band GSM / GPRS / EDGE w/ 16 Linear TRx Switch Ports-Dual-Band TD-SCDMA, TDD LTE Band 39-Dual Antenna

PRODUCT SUMMARY
SKY77928-11 SkyLiTE^™ Tx-Rx Front-End Module for Quad-
Band GSM / GPRS / EDGE w/ 16 Linear TRx Switch Ports –
Dual-Band TD-SCDMA, TDD LTE Band 39 – Dual Antenna
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
• Carrier Aggregation (CA) with dual antenna
Features
• Small, low profile package
- 5.5 mm x 5.5 mm x 0.8 mm Max.
- 44-pad configuration
• MIPI^® RFFE control
• RF ports internally matched to 50 Ω w/ zero DC offset
• High GMSK Efficiency (inclusive of coupler and diplexer)
- 34% GSM850 34% DCS1800
- 34% GSM900 34% PCS1900
• Tx harmonics below –40 dBm
• Supports APT, buck DC-DC supply
• 16 low loss/high linearity/high isolation TRx switch ports
with excellent cross-band flexibility
• Three directional couplers: LB/MB/HB
• Downlink inter-band CA support with L+M/H diplexer and
separate HB switch/antenna with ultra-low loss and
superb linearity
• Noise suppression notch filter for WiFi coexistence
• Built-in IEC-compliant antenna ESD protection
• High impedance control inputs and low standby current
• Current limiting and overvoltage ruggedness
• Power control circuitry built-in for improved TRP variation
Description
The SKY77928-11 SkyLiTE^™ Tx-Rx Front-End Module (FEM) offers a
complete Power Amplifier (PA) and switching solution for advanced
2G/3G/4G cellular handsets with dual antenna.
Two PAs support quad-band GSM, GPRS, EDGE multi-slot operation and
TD-SCDMA and TDD LTE transmission. The low band (LB) PA transmits
in the GSM850/900 bands. The mid-band (MB) PA covers DCS1800,
PCS1900, TD-SCDMA bands 34/39, and TDD LTE band 39. The FEM
facilitates flexible broadband RF switch-through by means of 16
transmit/ receive (TRx) antenna switch ports covering all 3G/4G bands
from 700 MHz through 2300-2700 MHz. In support of downlink inter-
band Carrier Aggregation (CA), the TRx ports are partitioned into three
independent switch blocks comprising 7 LB, 5 MB and 4 HB ports with
strong M/H cross-band support. Each switch block includes a
directional coupler that may be monitored on the CPL port with
selectable forward or reverse directionality. A diplexer and a second
antenna port provide flexible simultaneous L+M/HB reception required
for downlink CA.
The SKY77928-11 includes a full set of features for state-of-the-art
performance and minimal phone board complexity. The Heterojunction
Bipolar Transistor (HBT) PA blocks are fabricated in Gallium Arsenide
(GaAs). The HBT, switches, controller die, and passive components are
mounted on a multi-layer laminate substrate. A plastic overmold
encapsulates the entire assembly.
The CMOS controller provides PA band/mode selection and bias control,
including the Mobile Industry Processor Interface (MIPI) RFFE logic and
switch decoder circuitry. The PA controller provides VRAMP control of
the GMSK envelope and reduces sensitivity to input drive, temperature,
power supply, and process variations. Skyworks’ Finger-Based
Integrated Power Amplifier Control (FB-iPAC) minimizes output power
variation into mismatch. In EDGE and TD-SCDMA / TDD LTE linear
modes, VRAMP voltage and MIPI-based bias settings jointly optimize PA
linearity and efficiency.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
203560D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 8, 2016
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