本文介绍了GSR5712，一款高度集成的5GHzFEM模块，专为802.11ax应用设计，包含低噪声放大器、功率放大器和SP3TT/R开关。其特点包括紧凑的16pinQFN封装，内置滤波器和电源检测功能，适用于802.11ax网络设备如路由器、接入点等。
GSR5712 WIFI标准11ac 兼容替代 SKY85712，RTC5639，KCT8522
Product Description
The GSR5712 is a highly integrated, 5 GHz front end
module (FEM) incorporating a 5 GHz single-pole,
three-way throw (SP3T) transmit/receive (T/R) switch, a
5 GHz low noise amplifier (LNA) with bypass, and a 5
GHz power amplifier (PA) intended for 802.11ax
applications and systems.
The device is provided in a compact, 16 pin 3 x 3 mm
Quad Flat No Lead (QFN) package. Integrated die level
filtering for 2nd and 3rd harmonics as well as 2.4 GHz
rejection for DBDC operation are included. An integrated
power detector is included to provide closed-loop power
control within the system. The small form factor and
integrated matching minimizes layout area in the
application and greatly reduce the number of external
components.
The pin configuration and package are shown in Figure 1.
A functional block diagram is shown in Figure 2. Signal
pin assignments and functional pin descriptions are
provided in Table 1.
Key Features
l Integrated 802.11ax 5 GHz PA, LNA with bypass,
and T/R switch
l Fully matched input and output
l Pout = +18 dBm MCS11 -43dB EVM
l Pout = +22.5 dBm MCS9 -35 dB EVM
l Pout= +23.5 dBm MCS7 -30 dB EVM
l Transmit gain: 31 dB
l Receive gain: 13 dB
l 2 dB Noise Figure
l Small QFN (16 pin, 3 x 3 mm) Package
Applications
l 802.11ax networking and personal computing
systems
l WLAN enabled wireless video systems
l Access points
l Wireless Routers
l Residential Gateways
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