SKY85707-21

5 GHz, 802.11n/ac Front-end Module

Please note: SKY85707-21 is being discontinued and is not recommended for new designs. The suggested replacement is SKY85724-11

The SKY85707-21 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.

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 x 0.4 mm Quad Flat No-Lead (QFN) package.

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Specifications

Product LifecycleObsolete

Frequency (GHz) Min.4.9

Replacement Part SKY85724-11

Frequency (GHz) Max.5.85

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)240 (@ 17dBm)

Typ. P_OUT @ 3.0% EVM (dBm)17 (802.11n)
15 (1.8% EVM, 11ac)

Typ. Current @ V_CC = 5 V (mA)

802.11 WLAN Standardn/ac

Antenna Ports1

Architecture5 GHz Front End Module

Typ. P_OUT @ 2.5% EVM (dBm)

Typ. Tx Gain (dB)28

Typ. P_OUT (dBm)

V_DD (V)

V_CC (V)3.2-4.6

PackageQFN, 16-pin

Package (mm)2.5 x 2.5 x 0.40

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 loopback mode
Transmit gain: 28 dB
Receive gain: 12 dB
Output power: +17 dBm, MCS7, HT40
Output power: +15 dBm @ 1.8% EVM, MCS9, HT80
Direct connection to battery with 3.6 V nominal supply voltage
Small, QFN (16-pin, 2.5 x 2.5 x 0.4 mm) package (MSL1, 260 °C per JEDEC J-STD-020)

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