SKY85717-21

5 GHz, 802.11ac Front-End Module

The SKY85717-21 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 802.11ac 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.

Product Summary
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Specifications

Product LifecycleIn Production
Frequency (GHz) Min.
Frequency (GHz) Max.
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)
Typ. POUT @ 3.0% EVM (dBm)TBD
Typ. Current @ VCC = 5 V (mA)TBD
802.11 WLAN Standardac
Antenna Ports1
Architecture5 GHz WLAN Front-End Module
Typ. POUT @ 2.5% EVM (dBm)TBD
TBD
Typ. Tx Gain (dB)TBD
Typ. POUT (dBm)
VDD (V)
VCC (V)TBD
PackageQFN, 16-pin
Package (mm)2.5 x 2.5 x 0.4

Features

  • Integrated high-performance 5 GHz PA, 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: +19.5 dBm, MCS7, HT40
  • Output power: +18.5 dBm @ 1.8% EVM, MCS9, HT80
  • High-linearity and high-efficiency modes
  • Direct connection to battery with 5 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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