DATA SHEET RFX8425: 2.4 GHz CMOS WLAN/Bluetooth Dual-Mode RFeIC with PA, LNA, and SP3T Applications Smartphones, feature phones. and MIDs with WLAN/Bluetooth ANT WLAN/Bluetooth platforms requiring shared antenna Laptop/netbook/smartbook with embedded WiFi and Bluetooth DET Portable platforms with integrated 802.11b/g/n and Bluetooth RoHS and REACH compliant VMODE Features VDD Combines 802.11b/g/n/ac and Bluetooth applications High-linearity PA for 802.11 b/g/n/ac WLAN VDD LNA EN Low noise figure WLAN receive LNA with bypass for near range operation TX PA EN RX 204388-001 Built-in directional coupler-based output power detector Figure 1. RFX8425 Block Diagram ESD protection circuitry on all ports DC decoupled RF ports and VDD/RF isolation Description Small QFN (16-lead, 2.3 x 2.3 x 0.45 mm) package The RFX8425 is a pure CMOS-based, single-chip/single-die RFeIC (MSL1, 260 C per JEDEC J-STD-020) (RF front-end integrated circuit) that incorporates all key RF functionality needed for implementing high-performance RF front-end for WLAN IEEE 802.11b/g/n and OFDM/256QAM Skyworks Green products are compliant with operation in the 2.4 GHz band. The RFX8425 architecture all applicable legislation and are halogen-free. integrates a high-efficiency high-linearity power amplifier (PA) For additional information, refer to Skyworks with harmonic filter, a directional coupler-based power detector, a Denition of Green, document number low-noise amplifier (LNA), an SP3T switch for Bluetooth antenna SQ04-0074. sharing, and an additional SPDT switch for selection between LNA and Bypass in receive mode. All the impedance matching components and DC-block capacitors are also integrated to minimize the PCB footprint for system implementation. The RFX8425 is assembled in an ultra-compact, low-profile 2.3 x 2.3 x 0.45 mm 16-lead QFN package. It has simple and low-voltage CMOS control logic, and requires minimal external components. Designed to work in the 3.0 to 3.6 V range, the RFX8425 is an ideal RF front-end solution for implementing 2.4 GHz WLAN/BT in PC clients, tablets, and many other mobile platforms including smartphones that have a PMIC available to provide the required supply voltage for the RF front-end. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 204388B Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 20, 2018 1 1 2 3 4 DATA SHEET RFX8425: 2.4 GHz CMOS WLAN/BLUETOOTH DUAL-MODE RFEIC WITH PA, LNA, AND SP3T ANT N/C GND N/C 16 15 14 13 DET 12 GND 17 GND VMODE 11 N/C N/C 10 VDD VDD 9 LNA EN 5 6 7 8 204388-002 TX PA EN GND RX Figure 2. RFX8425 Pinout (Top View) Table 1. RFX8425 Signal Descriptions Pin Name Description Pin Name Description WLAN RX signal port to the transceiver/BT port 1 DET PA power detector output voltage 8 RX (DC shorted to GND) CMOS logic control used for PA Mode control in 2 VMODE 9 LNA EN CMOS logic control to enable LNA rome platform (unused for rhino platform) Not connected internally (can be grounded or left 4, 10 VDD DC voltage supply 3, 11, 13, 15 N/C open) WLAN TX signal port from the transceiver (DC Ground (must be connected to ground in the 5 TX 7, 12, 14, 17 GND shorted to GND) application circuit) RF signal port to/from the antenna (DC shorted to 6 PA EN CMOS logic control to enable WLAN transmit 16 ANT GND) Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 December 20, 2018 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 204388B