RFX8425

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  Portable platforms with integrated 802.11b/g/n and Bluetooth  RoHS and REACH compliant DET VMODE Features VDD  Combines 802.11b/g/n/ac and Bluetooth applications  High-linearity PA for 802.11 b/g/n/ac WLAN VDD  Low noise figure WLAN receive LNA with bypass for near range operation TX  Built-in directional coupler-based output power detector  Small QFN (16-lead, 2.3 x 2.3 x 0.45 mm) package (MSL1, 260 C per JEDEC J-STD-020) Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™, document number SQ04-0074. PA_EN RX 204388-001 Figure 1. RFX8425 Block Diagram  ESD protection circuitry on all ports  DC decoupled RF ports and VDD/RF isolation LNA_EN Description The RFX8425 is a pure CMOS-based, single-chip/single-die RFeIC (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 operation in the 2.4 GHz band. The RFX8425 architecture integrates a high-efficiency high-linearity power amplifier (PA) with harmonic filter, a directional coupler-based power detector, a low-noise amplifier (LNA), an SP3T switch for Bluetooth antenna 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 DATA SHEET • RFX8425: 2.4 GHz CMOS WLAN/BLUETOOTH® DUAL-MODE RFEIC WITH PA, LNA, AND SP3T DET ANT N/C GND N/C 16 15 14 13 1 17 GND 12 GND 11 N/C VMODE 2 N/C 3 10 VDD VDD 4 9 LNA _ EN 5 6 7 8 TX PA _ EN GND RX 204388-002 Figure 2. RFX8425 Pinout (Top View) Table 1. RFX8425 Signal Descriptions Pin Name Description Pin Name Description 1 DET PA power detector output voltage 8 RX WLAN RX signal port to the transceiver/BT port (DC shorted to GND) 2 VMODE CMOS logic control used for PA Mode control in rome platform (unused for rhino platform) 9 LNA_EN CMOS logic control to enable LNA 4, 10 VDD DC voltage supply 3, 11, 13, 15 N/C Not connected internally (can be grounded or left open) 5 TX WLAN TX signal port from the transceiver (DC shorted to GND) 7, 12, 14, 17 GND Ground (must be connected to ground in the application circuit) 6 PA_EN CMOS logic control to enable WLAN transmit 16 ANT RF signal port to/from the antenna (DC shorted to 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 DATA SHEET • RFX8425: 2.4 GHz CMOS WLAN/BLUETOOTH® DUAL-MODE RFEIC WITH PA, LNA, AND SP3T Electrical and Mechanical Specifications The absolute maximum ratings of the RFX8425 are provided in Table 2. The recommended operating conditions are specified in Table 3. The electrical specifications are provided in Tables 4 and 5. The state of the RFX8425 is determined by the logic provided in Table 6. Table 2. RFX8425 Absolute Maximum Ratings1 Minimum Maximum Units DC VDD voltage supply Parameter All VDD pins Conditions -0.3 4 V DC control pin voltage All control pins -0.3 3.6 V DC VDD current consumption Through VDD pins when TX is ON 350 mA +10 dBm +20 dBm 150 °C –40 +150 °C –20 +85 °C TX RF input power ANT RF input power Bypass mode Junction temperature Storage ambient temperature Appropriate care required according to JEDEC Standards Operating ambient temperature Electrostatic discharge: Human Body Model (HBM) All pins ±4250 V 1 Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set at or below their nominal value. Exceeding any of the limits listed here may result in permanent damage to the device. All maximum RF input power ratings assume 50 Ω terminal impedance. ESD HANDLING: Although this device is designed to be as robust as possible, electrostatic discharge (ESD) can damage this device. This device must be protected at all times from ESD when handling or transporting. Static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD handling precautions should be used at all times. Table 3. RFX8425 Recommended Operating Conditions Parameter VDD voltage supply1 Conditions All VDD pins Min Typ Max Units 3.0 3.3 3.6 V RF port impedance Ω 50 Control voltage high2 Control voltage low 1.2 3.6 V 0 0.4 V Control pin current 1 uA Shutdown current 6 uA PA turn on/off time 0.4 μs LNA turn on/off time 0.4 μs jc3 29 °C/W ja 45 °C/W 1 For normal operation of the RFX8425, VDD must be continuously applied to all VDD supply pins. 2 If control voltage can exceed 2.0 V, a 1 kΩ to 10 kΩ series resistor is recommended for the application circuit on each control line. 3 Thermal measurements were performed on a test EVB under typical use conditions. Please contact Skyworks for details regarding the test conditions and the configuration of the thermal vias on the EVB. Refer to the PCB Land Pattern in Figure 3 for recommended thermal vias. 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 3 DATA SHEET • RFX8425: 2.4 GHz CMOS WLAN/BLUETOOTH® DUAL-MODE RFEIC WITH PA, LNA, AND SP3T Table 4. RFX8425 Transmit Electrical Characteristics (VDD = 3.3 V, TA = +25°C, Unless Otherwise Specified) Parameter Test Condition Min Operating frequency band Typ 2.4 Max Units 2.5 GHz Linear output power for 802.11ac Dynamic EVM < -35 dB for MCS9/VHT40 +18 dBm Linear output power for 802.11n Dynamic EVM < -32 dB for MCS7/HT20 +18.5 dBm Linear output power for 802.11a Dynamic EVM < -32 dB for 64 QAM/54 Mbps +19 dBm Linear output power for 802.11a, 6 Mbps For 802.11b 1 Mbps CCK mask compliance with 1.5 dB margin +22 dBm Total supply current for 802.11ac For POUT = +18 dBm, MCS9/VHT40 140 dB 26 mA Second harmonic POUT = +22 dBm, 11b 1 Mbps CCK –8 dB Third harmonic POUT = +22 dBm, 11b 1 Mbps CCK –27 dBm/MHz Power detector voltage Measured with 10 kΩ load, POUT = +5 to +20 dBm TX small signal gain 250 to 1000 mV Input return loss –12 dB Output return loss –6 dB Table 5. RFX8425 Receive Electrical Characteristics (VDD = 3.3 V, TA = +25°C, Unless Otherwise Specified) Parameter Test Condition Min Operating frequency Typical 2.4 Max Units 2.5 GHz Small-signal gain (high-gain mode) 16 dB Noise figure 2.6 dB LNA quiescent current 12 mA +3.0 dBm 1.5 dB IIP3 Insertion loss (bypass mode) Table 6. RFX8425 Control Logic1 Mode of Operation TXEN LEN RXEN Bypass/sleep mode 0 0 0 High linearity transmit mode 1 X X Receive mode with LNA ON 0 1 1 Power save transmit mode 0 0 1 Power save transmit mode All others 1 “1” denotes high voltage state (> 1.2 V) “0” denotes low voltage stage (< 0.4 V) at control pins “X” denotes do not care 1 kΩ – 10 kΩ series resistor may be required for each control line. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 4 December 20, 2018 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 204388B DATA SHEET • RFX8425: 2.4 GHz CMOS WLAN/BLUETOOTH® DUAL-MODE RFEIC WITH PA, LNA, AND SP3T Package Dimensions Package and Handling Information The PCB layout footprint for the RFX8425 is shown in Figure 3. The typical part marking is shown in Figure 4. Package dimensions are shown in Figure 5. Instructions on the shipping container label regarding exposure to moisture after the container seal is broken must be followed. Otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. The RFX8425 is rated to Moisture Sensitivity Level 1 (MSL1) at 260 C. It can be used for lead or lead-free soldering. For additional information, refer to the Skyworks Application Note, Solder Reflow Information, document number 200164. Care must be taken when attaching this product, whether it is done manually or in a production solder reflow environment. Production quantities of this product are shipped in a standard tape and reel format. 0.2mm 0.4mm 0.15mm 0.4mm 1.4mm 1.4mm 0.2mm drill ( x9) 2.6mm 0.475mm 2.3 mm 204388-003 Figure 3. RFX8425 PCB Layout Footprint 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 5 DATA SHEET • RFX8425: 2.4 GHz CMOS WLAN/BLUETOOTH® DUAL-MODE RFEIC WITH PA, LNA, AND SP3T Pin 1 Indicator 8425 LLLL.L UBYYWW Skyworks Part Number Wafer Lot Date Code 204388-004 Figure 4. Typical Part Markings (Top View) 2.30 BSC 0.45 ± 0.05 0.000 – 0.0 Pin 1 Indicator 0.20 ± 0.05 1.40 ± 0.05 2.30 BSC 0.400 BSC Pin 1 Indicator 1.40 ± 0.05 0.25 ± 0.05 Top View Side View Bottom View 204388-005 All dimensions are in millimeters. Figure 5. RFX8425 Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 6 December 20, 2018 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 204388B DATA SHEET • RFX8425: 2.4 GHz CMOS WLAN/BLUETOOTH® DUAL-MODE RFEIC WITH PA, LNA, AND SP3T Ordering Information Model Name ® RFX8425: 2.4 GHz CMOS WLAN/Bluetooth Dual-Mode RFeIC with PA, LNA, and SP3T Manufacturing Part Number RFX8425 Evaluation Board Part Number RFX8425-EK1 Copyright © 2016,2018 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. 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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 7