RFFM8528 RFFM8528 WiFi Front End Module 5180MHz to 5825MHz Package: QFN, 16-pin, 2.3mm x 2.3mm x 0.33mm max The RFFM8528 provides a complete integrated solution in a single front end module (FEM) for WiFi 802.11a/n/ac systems. The next generation ultra-small factor and integrated matching minimizes layout area in the customer’s application, reduces the bill of materials and greatly reduces the number of external components. Performance is focused on a balance of efficiency to enable long battery life and linear power that increases the range of connection. The RFFM8528 integrates a 5GHz power amplifier (PA), single pole double throw switch (SP2T), LNA with bypass, and a power detector coupler for improved accuracy. The device is provided in a 2.3mm x 2.3mm x 0.33mm, 16-pin QFN package. LNA_EN NC 16 15 GND ANT 14 13 GND 1 12 GND RX 2 11 VCC GND 3 10 VCC VCC 4 9 5 7 6 PDET PA_EN GND VMODE Features ■ POUT = +17.5dBm, 802.11ac, 80MHz MCS9 at 1.8% (-35dB) Dynamic EVM ■ High efficiency ■ Input and Output Matched to 50Ω ■ Integrated 5GHz PA, SP2T, LNA with Bypass and PDET ■ Supports low power mode for increased efficiency operation ■ Optional logic schemes for control ■ Low Height Package, Suited for SiP and CoB designs Applications ■ Smartphones ■ Tablets ■ Netbooks/Notebooks ■ Mobile Devices ■ Automotive 8 TX Functional Block Diagram Ordering Information RFFM8528SB Standard 5-piece bag RFFM8528SQ Standard 25-piece bag RFFM8528SR Standard 100-piece reel RFFM8528TR7 Standard 2500-piece reel RFFM8528TR7-5K Standard 5000-piece reel RFFM8528PCK-410 Fully assembled evaluation board w/ 5-piece bag RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. ® DS140731 ® RF MICRO DEVICES and RFMD are trademarks of RFMD, LLC. BLUETOOTH is a trademark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks, and registered trademarks are the property of their respective owners. ©2013, RF Micro Devices, Inc. 1 of 10 RFFM8528 Absolute Maximum Ratings Parameter Rating Unit PA Enable Voltage -0.5 to +6.0 -0.5 to 5 VDC VDC DC Supply Current 500 mA -40 to +150 ºC Maximum TX Input Power into 50Ω Load for 11a/n (No Damage) +12 dBm LNA On Maximum RX input power (No damage) +12 dBm +25 dBm DC Supply Voltage (No RF Applied) Storage Temperature Bypass Mode Maximum RX input power (No damage) Moisture Sensitivity Caution! ESD sensitive device. RFMD Green: RoHS status based on EU Directive 2011/65/EU (at time of this document revision), halogen free per IEC 61249-2-21, < 1000ppm each of antimony trioxide in polymeric materials and red phosphorus as a flame retardant, and <2% antimony in solder. Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied. MSL2 Nominal Operating Parameters Specification Parameter Unit Min Typ Condition Max Compliance 802.11a, 802.11n, 802.11ac Operating Frequency 5.18 5.825 GHz Extended Frequency 4.9 5.925 GHz Operating Temperature -20 25 +65 ºC Extended Operating Temperature -40 25 +85 ºC Power Supply VCC 3.0 3.3 3.6 V Extended VCC 3.0 4.2 V Functional with reduced performance Control Voltage-High 2.8 2.95 VCC V For PA_EN, LNA_EN, VMODE 0 0.2 V For PA_EN, LNA_EN, VMODE Control Voltage-Low Transmit (TX-ANT) High Power Mode Gain flatness Across Any 80MHz Channel Functional with reduced performance VCC=3.3V; PA_EN = High; LNA_EN = Low; VMODE = Low; T=+25ºC; Unless otherwise noted Small Signal Gain (5.18 to 5.85GHz) Gain Flatness Across the Band Functional with reduced performance 28 dB -1 1 -0.5 0.5 20MHz Output Power* 11n 20MHz Dynamic EVM 80MHz Output Power* 11ac 80MHz Dynamic EVM dB dB 19 dBm 2.5 % -32 dB 17.5 dBm 1.8 % -35 dB 802.11n HT20 MCS7 802.11ac VHT80 MCS9 TX Port Return Loss 12 18 dB ANT Port Return Loss 14 20 dB 802.11a 6Mbps Operating Current 328 mA POUT = +22dBm 20MHz 802.11n Operating Current 250 mA POUT = +19dBm 80MHz 802.11ac Operating Current 225 mA POUT = +17.5dBm Second Harmonic -33 dBm/MHz Third Harmonic -33 dBm/MHz RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. Fundamental frequency is between 4900 and 5850MHz; RF POUT = +22dBm. Measured in 1MHz resolution bandwidth (FCC limit max = -30dBm) DS140731 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 2 of 10 RFFM8528 Specification Parameter Unit Min Typ Condition Max Transmit (TX-ANT) High Power Mode (continued) VCC=3.3V; PA_EN = High; LNA_EN = Low; VMODE = Low; T=+25ºC; Unless otherwise noted Margin to 20Mhz Spectral Mask* 2 dBc 802.11n HT20 at POUT = +20dBm Margin to 80MHz Spectral Mask* 2 dBc 802.11ac VHT80 at POUT = +20dBm Power Detector Voltage 0.8 1.05 V Variation Across Band -0.5 0.5 dB Variation Over Temperature -1.5 1.5 dB Transmit (TX-ANT) Low Power Mode VCC=3.3V; PA_EN = High; LNA_EN = Low; VMODE = High; T=+25ºC; Unless otherwise noted 20MHz Output Power* 9 11n 20MHz Dynamic EVM 80MHz Output Power* POUT = +17.5dBm 9 dBm 1 % -40 dB 10 dBm 802.11n HT20 MCS7 1.2 % -38.5 dB 20 MHz 802.11n Current 145 mA POUT = +9dBm 80 MHz 802.11ac Current 145 mA POUT = +9dBm 11ac 80MHz Dynamic EVM 802.11ac VHT80 MCS9 VCC=3.3V; PA_EN = Low; LNA_EN = High; VMODE = Low; T=+25ºC; Unless otherwise noted Receive (ANT-RX) LNA On Gain 11 Gain Flatness Across Band -1 13 15 dB 1 dB 3 dB Noise Figure 2.5 Rx Port Return Loss 12 ANT Port Return Loss 8 dB RX Current 10 mA Input P1dB -4 dBm dB VCC=3.3V; PA_EN = Low; LNA_EN = Low; VMODE = Low; T=+25ºC; Unless otherwise noted Receive (ANT-RX) Bypass Mode Bypass Loss 2 Gain Flatness Across Band -1 3 4.5 dB 1 dB RX Port Return Loss 7 dB ANT Port Return Loss 11 dB ANT to RX Isolation 38 dB TX to RX Isolation 25 dB PA_EN Current 250 uA General Specifications LNA_EN current Leakage Current 83 0.1 Switch in TX Mode uA 2 5 uA Switch Control Current – High 5 100 uA Switch Control Current – Low 0.5 2 uA Switching Speed 100 200 nS ESD – Human Body Model 1000 ESD – Charge Device Model 1000 PA Turn-on Time from PA_EN edge 150 VCC=3.3V, No RF applied, PA_EN=LNA_EN=VMODE=Low Per line V V 200 nS RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. 10% to 90% of final gain DS140731 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 3 of 10 RFFM8528 Specification Parameter Unit Min Typ Condition Max General Specifications PA Turn-off Time from PA_EN edge Ruggedness 150 200 nS 10:1 VSWR 90% to 10% of final gain At typical operating conditions *For 4900MHz to 5150MHz, POUT is reduced by 1dB Switch Control Logic Truth Table PA_EN LNA_EN VMODE Standby Low Low Low 802.11a/n/ac TX High Power Mode High Low Low 802.11a/n/ac TX Low Power Mode High Low High 802.11a/n/ac TX Low Power Mode (Optional) High High Low 802.11a/n/ac RX Gain Low High Low 802.11a/n/ac RX Bypass Low Low Low Operating Mode Note: 1. 2. TX Low Power Mode is enabled either internally or with an option for external VMODE. High = 2.8V to VCC, Low = 0V to 0.2V. RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS140731 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 4 of 10 RFFM8528 Evaluation Board Schematic RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS140731 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 5 of 10 RFFM8528 Timing Diagram RFFM8528 Transmit Timing Diagram Power ON / OFF Sequence VCC PA_EN Range is set Per the data sheet Apply 3.3v to pins 4, 10, and 11 Level is set Per the data sheet For Transmit: apply 2.9v to pin 6 RF signal ON time is 0.5uS max. Set RF input to required level. LNA_EN LNA_EN is Low during TX Both controls must be OFF during transmit. The order is not critical. Apply a max of 0.2V to pins 9 and 16 VMODE VMODE is Low during TX Time 0.2uSec 0.2uSec 0.2uSec 0.2uSec Note: 1. RF Signal for each specific mode is applied after the DC bias is applied 2. Total ON/OFF time includes from 10% of control switching to 90% of RF power 3. Listed values on diagram are typical. The maximum is 0.5us for each mode RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS140731 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 6 of 10 RFFM8528 Timing Sequence Notes: 802.11a/n/ac Transmit Biasing Instructions 1. Connect the FEM to a signal generator at the input and a spectrum analyzer at the output. Terminate unused ports with 50 Ohms. 2. Set the power supply voltage to 3.3V first with PA_EN ≤ 0.2V. Leakage current will be <5uA typical. 3. Refer to switch operational truth table to set the control lines at the proper levels for WiFi TX. All OFF voltages must be ≤ 0.2V (cannot be floating). 4. Turn on PA_EN with levels indicated in the datasheet. PA_EN controls the current drawn by the 802.11a/n/ac power amplifier and the current should quickly rise to ~160mA +/- 20mA for a typical part but the actual operating current will be based on the output power desired. Be extremely careful not to exceed 5.0V on the PA_EN pin or the part may exceed device current limits. 802.11a/n/ac Transmit Turn On Sequence (See Transmit Timing Diagram) 1. Turn ON power supply. 2. Turn ON PA_EN. 3. Apply RF. 802.11a/n/ac Transmit Turn Off Sequence 1. Turn OFF RF. 2. Turn OFF PA_EN. 3. Turn OFF power supply. 802.11a/n/ac Receive 1. To receive WiFi set the switch control lines per the truth table. 2. Antenna port is input and RX port is output for this test. 3. Follow Timing Diagram for biasing instructions. RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS140731 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 7 of 10 RFFM8528 Pin Out LNA_EN NC 16 15 GND ANT 14 13 GND 1 12 GND RX 2 11 VCC GND 3 10 VCC VCC 4 9 5 6 7 PDET PA_EN GND VMODE 8 TX Package Outline (Dimensions in millimeters) RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS140731 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 8 of 10 RFFM8528 PCB Patterns RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS140731 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 9 of 10 RFFM8528 Pin Names and Descriptions Pin Name Description 1 GND 2 RX 3 GND Ground connection. This pin is not connected internally and can be left floating or connected to ground. 4 VCC Supply voltage for the LNA and PA Regulator. See applications schematic for biasing and bypassing components. 5 PDET Power Detector voltage for the TX path. May need external series R/shunt C to adjust voltage level and to filter RF noise. 6 PA_EN Control voltage for the PA and TX switch. Optional method to enact Low Power Mode when placed in High state at same time with LNA_EN in High state. See truth table for proper voltage settings. 7 GND 8 TX 9 VMODE 10 VCC Supply voltage for the 1st and 2nd stage of the PA. See applications schematic for biasing and bypassing components. 11 VCC Supply voltage for the final stage of the PA. See applications schematic for biasing and bypassing components. 12 GND Ground connection. This pin is not connected internally and can be left floating or connected to ground. 13 ANT RF bidirectional antenna port matched to 50Ω. An external DC block is required. 14 GND Ground connection. This pin is not connected internally and can be left floating or connected to ground. 15 NC 16 LNA_EN Control voltage for the LNA. When this pin is set to a Low logic state, the Bypass Mode is enabled. Optional method to enact Low Power Mode when placed in High state at same time with PA_EN in High state. See truth table for proper voltage settings. Pkg Base GND Ground connection. The backside of the package should be connected to the ground plane through a short path, i.e., PCB vias under the device are recommended. Ground connection. This pin is not connected internally and can be left floating or connected to ground. RF output port for the 802.11a/n/ac LNA. This port is matched to 50Ω and DC blocked internally. Ground connection. This pin is not connected internally and can be left floating or connected to ground. RF input port for the 802.11a/n/ac PA. This port is matched to 50Ω and DC blocked internally. High/Low Power mode control signal. VMODE can be low or left floating for nominal conditions (High Power Mode.) Applying 2.8V or greater to this pin enables Low Power Mode No Connect. This pin is not connected internally. It can be left floating or connected to ground. RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS140731 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 10 of 10