SKY85709-11

5 GHz 802.11ac WLAN Front-end Module

The SKY85709-11 is a highly-integrated, 5 GHz Front-End Module (FEM) incorporating a 5 GHz Single-Pole, Double-Throw (SPDT) transmit/receive (T/R) switch, a 5 GHz Low-Noise Amplifier (LNA) with bypass, and a 5 GHz Power Amplifier (PA) intended for mobile/portable 802.11n/ac applications and systems. The device operates from a single supply voltage of 3.6 V.

An enable/disable function is included that allows power savings during off mode. An integrated power detector with 20 dB of dynamic range is included to provide closed-loop power control within the system.

The device is provided in a compact, 16-pin 2.5 x 2.5 mm Quad Flat No-Lead (QFN) package.

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Specifications

Product LifecycleIn Production

Frequency (GHz) Min.4.9

Frequency (GHz) Max.5.25

Typ. Current @ V_DD = 3.3 V 17.5dBm (mA)

Typ. Current @ V_DD = 3.6 V 17.5dBm (mA)

Typ. Current @ V_CC = 3.6 V (mA)260 (@19dBm)

Typ. P_OUT @ 3.0% EVM (dBm)18 (802.11n)
16 (1.5%
EVM, 11ac)

Typ. Current @ V_CC = 5 V (mA)

802.11 WLAN Standardn/ac

Antenna Ports1

Architecture5GHz Front End Module with Integrated PA,
LNA with bypass and SPDT

Typ. P_OUT @ 2.5% EVM (dBm)

Typ. Tx Gain (dB)30

Typ. P_OUT (dBm)

V_DD (V)

V_CC (V)3.0-4.8

PackageQFN, 16-pin

Package (mm)2.5 x 2.5 x 0.45

Features

Integrated high performance 5 GHz PA with harmonic filter, LNA with bypass, and SPDT
Fully-matched input and output
Integrated, positive slope power detector
Transmit gain: 30 dB
Receive gain: 13.5 dB
Output power: +19 dBm @ 2% EVM, 64 QAM 54 Mbps
Output power: +18 dBm @ 2% EVM, MCS7 HT40
Output power: +16 dBm @ 1.5% EVM, MCS9 HT80
Direct connection to battery with 3.6 V nominal supply voltage
Small, QFN (16-pin, 2.5 x 2.5 mm) package (MSL1, 260 C per JEDEC J-STD-020)

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