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SKY85707-21

5 GHz, 802.11n/ac Front-end Module

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.

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

Images & Diagrams

Specifications

    • Frequency (GHz) Min.
    • 4.9
    • Frequency (GHz) Max.
    • 5.85
    • Typ. Current @ VDD = 3.3 V 17.5dBm (mA)
    • Typ. Current @ VDD = 3.6 V 17.5dBm (mA)
    • Typ. Current @ VCC = 3.6 V (mA)
    • 240 (@ 17dBm)
    • Typ. POUT @ 3.0% EVM (dBm)
    • 17 (802.11n)
      15 (1.8% EVM, 11ac)
    • Typ. Current @ VCC = 5 V (mA)
    • 802.11 WLAN Standard
    • n/ac
    • Antenna Ports
    • 1
    • Architecture
    • 5 GHz Front End Module
    • Typ. POUT @ 2.5% EVM (dBm)
    • Typ. Current @ VCC = 3.3 V (mA)
    • Typ. Tx Gain (dB)
    • 28
    • Typ. POUT (dBm)
    • VDD (V)
    • VCC (V)
    • 3.2-4.6
    • Package
    • QFN, 16-pin
    • Package (mm)
    • 2.5 x 2.5 x 0.40

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