Applications

 IEEE 802.11ac/n WLANs

 5 GHz ISM radios

 SmartPhones

 Notebooks, netbooks, tablets

 Access points, routers, gateways

 Wireless video systems

Features

 Ultra-low Noise Figure

 4.9 GHz to 5.9 GHz operation

 Enable/disable/bypass modes

 High IIP3

 High gain

 2.8 V to 3.6 V single-supply operation

 QFN (6-pin, 1.5 x 1.5 mm) package (MSL1, 260 C per

JEDEC J-STD-020)

Description

The SKY65981-11 is an ultra Low-Noise Amplifier (LNA) intended

for 5 GHz, IEEE 802.11ac/n wireless receiver applications. Its

industry-leading Noise Figure (NF), together with high linearity,

make it ideal as a first-stage LNA in IEEE 802.11ac/n Wireless

Local Area Network (WLAN) radios.

Operating with a single supply voltage, the SKY65981-11

consumes only 12 mA of current. The device includes a bypass

mode for near field applications and to save power when the

receiver is inactive.

The tiny package footprint of the SKY65981-11, requiring only

four external components, enables the industry’s smallest PCB

area needed to implement a fully-matched 5 GHz LNA.

A block diagram of the SKY65981-11 is shown in Figure 1. The

device package and pinout for the 6-pin Quad Flat No-Lead (QFN)

are shown in Figure 2.