Dual-Band 802.11a/g/n/ac Wireless LAN Front EndThe SKY85809-11 is a complete 802.11a/b/g/n/ac wireless local area network (WLAN), RF front-end module (FEM) that provides all the functionality of a power amplifier (PA), filtering, power detector, transmit/receive (T/R) switch, diplexer, and associated matching. The SKY85809-11 provides a complete 2.4 GHz and 5 GHz WLAN RF solution, from the output of the transceiver to the antenna in an ultra-compact form factor. Designed to meet the stringent linearity conditions of the 802.11ac standard, the SKY85809-11 delivers less than 2% error vector magnitude (EVM) at the rated alternating current (AC) power.
Designed for ease of use, all RF ports are matched to 50 to simplify the layout of the printed circuit board (PCB) and the interface to the transceiver. The SKY85809-11 also includes a transmitter power detector with +20 dB of dynamic range for each transmit chain. Each power amplifier has a separate digital enable control for transmitter on/off control. The power ramp rise/fall time is less than 0.5 µs.
The SKY85809-11 provides local oscillator (LO) filters for the 2 GHz and 5 GHz transmit paths.
The SKY85809-11 is packaged in a small 4.0 x 3.0 x 0.6 mm, Quad Flat No-Lead (QFN) package.
- All RF ports matched to 50
- Integrated 2.4 GHz PA, 5 GHz PA, transmit filter, diplexers, and T/R switches
- Integrated logarithmic power detector for each transmit chain
- +25 dBm power, 802.11b, 11 Mbps, ACPR = +35 dBc
- +22 dBm @ 3% (-30 dB) EVM, MCS7, HT40, 2G
- +19.5 dBm @ 3% (-30 dB) EVM, MCS7, HT40, 5G
- +20 dBm @ 1.8% (-35 dB) EVM, MCS9, HT40, 2G
- +18.5 dBm @ 1.8% (-35 dB) EVM, MCS9, HT80, 5G
- Single supply voltage: 5.0 V ± 10%
- Sleep mode: < 1 A
- Bluetooth® functional when VCC = 0 V or 5.0 V
- Bluetooth and 5 GHz WiFi concurrent operation
- Multiple receive bypass step attenuation
- Small QFN (28-pin, 4.0 x 3.0 x 0.6 mm) package (MSL3, 260 °C per JEDEC J-STD-020)
Images & Diagrams
- Frequency (GHz) Min.
- Frequency (GHz) Max.
- 802.11 WLAN Standard
- Antenna Ports
- Dual Band 802.11a/b/g/n/ac WLAN FEM
- Typ. POUT @ 2.5% EVM (dBm)
- Typ. Current @ VCC = 3.3 V (mA)
- Typ. POUT @ 3.0% EVM (dBm)
- Typ. Tx Gain (dB)
- VCC (V)
- QFN, 28-pin
- Package (mm)
- 4 x 4 x 0.6
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