RFFM3482Q 2.4GHz to 2.5GHz, Automotive WiFi Front End Module BT RXBP GND ANT 11 RX SW 3 10 TX SW 9 5 VB 6 7 8 PDET PAEN 4 Automotive WiFi Diagnostic Data Infotainment 12 BTH SW GND 2 Applications 13 PABC Single Voltage Supply 3.3V to 4.2V Integrated 2.5GHz b/g/n Amplifier, Rx Balun and Tx/Rx Switch and Directional Power Detector POUT = 17dBm, 11g, OFDM at 2.4% EVM and POUT = 21.5dBm, Meeting 11b Mask 14 VB 15 Balun 16 TXB 1 Features RXBN Package Style: QFN, 16-pin, 3mm x 3mm x 0.45mm VB Functional Block Diagram Product Description The RFFM3842Q FEM is a single-chip integrated front end module (FEM) for automotive WiFi. The FEM addresses the need for aggressive size reduction for a typical 802.11b/g/n front end design and greatly reduces the number of components outside of the core chipset. The front end module has integrated b/g/n power amplifier, directional power detector, Rx balun, and some Tx filtering. It is also capable of switching between WiFi Rx, WiFi Tx and BTH RX/TX operations. The device is provided in a 3mm x 3mm x 0.45mm, 16-pin package. This module meets or exceeds the RF front end needs of 802.11b/g/n WiFi RF systems. Ordering Information RFFM3482QTR13X Standard 1 piece RFFM3482QSQ Standard 25 piece bag RFFM3482QSR Standard 100 piece bag RFFM3482QTR7 Standard 2500 piece reel RFFM3482QPCK-41XFully Assembled Evaluation Board and 5 loose sample pieces RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ 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. ©2012, RF Micro Devices, Inc. DS121108 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 1 of 13 RFFM3482Q Absolute Maximum Ratings Parameter DC Supply Voltage Rating Unit 5.6 VDC Full Specification Temp Range (Full Spec. Compliant) -40 to +85 °C Storage Temperature -40 to +150 °C Maximum Tx Input Power for 11b (No Damage) +10 dBm Maximum Tx Input Power for 11g (No Damage) +10 dBm Moisture Sensitivity Caution! ESD sensitive device. 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. The information in this publication is believed to be accurate and reliable. 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. RFMD Green: RoHS compliant per EU Directive 2002/95/EC, 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. MSL2 Nominal Operating Parameters Bm Specification Min. Typ. Max. Parameter Unit Condition 2.4GHz Transmit Parameters Compliance IEEE802.11b, IEEE802.11g, FCC CFG 15.247, .205, .209 Nominal Conditions VCC = 3.6V, PAEN = 1.8V pulsed at 1% to 100% duty cycle, Temp = +25°C, Freq = 2.4GHz to 2.5GHz, unless otherwise noted Frequency 2.4 2.5 GHz Output Power 11g 15 17 dBm 54Mbps, OFDM, 64QAM meeting EVM requirement1 11b 19.5 21.5 dBm Measured at 1Mbps meeting ACP1/ACP2 requirements 11n 13.5 16 dBm EVM* 11g 2.4 3.5 EVM* 11n MCS7, OFDM % RMS, mean, POUT(g) = 15dBm RMS, mean, POUT(n) = 13.5dBm 2.2 2.8 % ACP1 -36 -31 dBc ACP2 -56 -51 dBc 33 38 dB -3 +3 dB Over temperature and voltage -1.0 +1.0 dB 2.4GHz to 2.5GHz Gain Gain Variation Frequency 26.5 POUT = 19.5dBm, IEEE802.11b, 11Mbps CCK, 1Mbps BPSK modulation *The EVM specification is obtained with a signal generator that has an EVM level <0.7%. 1. With Vcc >3.0V to 3.3V there will be a 0.5dB degradation in 11g linear output power. 2. The Typical parameters are at nominal conditions. Min/Max parameters are over all conditions. 2 of 13 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS121108 RFFM3482Q Specification Min. Typ. Max. Parameter Unit Condition 2.4GHz Transmit Parameters (continued) Power Detect Voltage Detect 0 POUT = 16dBm 0.260 Input Resistance 0.31 0.8 V <21dBm output power 0.380 V IEEE802.11g, 54Mbps 64QAM modulation 10 Input Capacitance k 5 Bandwidth 800 1000 pF kHz Sensitivity 0dBm to 7dBm 2 mV/dB 8dBm to 15dBm 10 mV/dB >15dBm 20 mV/dB Current Consumption IEEE802.11g ICC 140 160 IEEE802.11b ICC 200 IPAEN Leakage 180 mA RF POUT = 15dBm, 54Mbps IEEE802.11g 220 240 mA RF POUT = 19.5dBm, 11Mbps IEEE802.11b 240 400 A PA EN = High 2 6 A VB <4.0V all control inputs = “off”, no RF at 25°C 25 A VB <4.0V all control inputs = “off”, no RF at 85°C Power Supply 3.3 3.6 4.2 V PA EN Voltage ON 1.6 1.8 2.0 V PA is turned ON V PA is turned OFF Used to drive the PABC current PA EN Voltage OFF 0 PABC Voltage 0 1.0 V PABC Current 0 1.8 mA Input/Output Impedance 50 Output Load VSWR Ruggedness No damage or permanent degradation to device VSWR = 10:1; all phase angles (VRAMP set for POUT <22dBm into 50 load; load switched to VSWR = 10:1) Out of Band Gain (S21) at 50 relative to minimal in-band gain 86MHz to 108MHz 30 dBr 776MHz to 894MHz 20 dBr 925MHz to 980MHz 20 dBr 1570MHz to 1580MHz 20 dBr 1805MHz to 1880MHz 20 dBr 1930MHz to 1990MHz 20 dBr 2110MHz to 2170MHz 15 dBr Harmonics RBW = 1MHz. Measured in CW. Second -30 dBc 4.80GHz to 5.00GHz Third -50 dBc 7.20GHz to 7.50GHz Fourth -60 dBc 2.4GHz Receive Parameters Frequency 2.5 GHz 2.5 dB Noise Figure 2.5 dB Passband Ripple 0.3 dB -9 dB Insertion Loss 2.4 2.1 Output Return Loss Output Impedance DS121108 100 Switch and Balun No external matching 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 3 of 13 RFFM3482Q Specification Min. Typ. Max. Parameter Unit Condition 2.4GHz Receive Parameters (continued) Balun Amplitude Balance -1 1 dB Phase Balance -10 10 ° 2.5 GHz 1.5 dB Relative to 180° Bluetooth Parameters Frequency 2.4 Insertion Loss 1.0 Passband Ripple -0.3 Input/Output Power P1dB 20 +0.3 SP3T switch, all unused ports terminated into their nominal impedance dB dBm Output Return Loss -12 Output Impedance 50 -10 dB No external matching S Output stable to within 90% of final gain General Characteristics Turn-On/Off Time 1.0 Antenna Port Impedance Input 50 Receive Output 50 Transmit Switch Control Voltage Low 0 0.1 High 1.6 V 2.0 V Switch Control Current 4 A Switch Control Speed 100 nsec Per control line TX Per control lines, TX, RX and BT ESD Human Body Model 500 V EIA/JESD22-114A Charge Device Model 750 V EIA/JESD22-C101 *The EVM specification is obtained with a signal generator that has an EVM level <0.7%. Isolation Table Parameter Min. Typ. Max. Unit WiFi RX to BT RX/TX 22 29 dB WiFi TX to BT RX/TX 22 25 dB WiFi RX to WiFi TX 20 38 dB ANT TX 25 45 dB ANT RX 25 28 dB Switch Control Logic Mode BTW_SW RX_SW TX_SW Bluetooth 1 0 0 0 WiFi TX 0 0 1 1 WiFi RX 0 1 0 0 Simultation BT/RX 1 1 0 0 Calibration 0 1 0 1 1 0 0 1 1 1 0 1 4 of 13 PA_EN 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS121108 RFFM3482Q Pin Names and Descriptions Pin 1 2 3 4 Name TXB GND BT PAEN 5 6 7 8 VB VB PABC PDET 9 10 11 12 13 14 15 16 Pkg Base VB TX SW RX SW BTH SW ANT GND RX+ RXGND DS121108 Description RF input for the 802.11b/g/n PA. Input is matched to 50 and DC block is provided. Ground. RF bidirectional port for Bluetooth. Input is matched to 50 and DC block is provided. Digital enable pin for the 802.11b/g/n PA. This is an active high control. An external bypass capacitor may be needed on the PA EN line for decoupling purposes. Supply voltage for the 802.11b/g/n PA. Supply voltage for the 802.11b/g/n PA. Linearity and Efficiency control pin, please see the Theory of Operation for more information. Power detector voltage for Tx section. PDET voltage varies with output power. May need external decoupling capacitor for module stability. May need external circuitry to bring output voltage to desired level. Supply voltage for the 802.11b/g/n PA. Switch control port. See switch truth table for proper level. Switch control port. See switch truth table for proper level. Switch control port. See switch truth table for proper level. FEM connection to filter and antenna. Port is matched to 50 and DC block is provided. Ground. Receive port for 802.11b/g/n band. Internally matched to 100 differential. DC block provided. Receive port for 802.11b/g/n band. Internally matched to 100 differential. DC block provided. The center metal base of the QFN package provides DC and RF ground as well as heat sink for the front end module. 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 5 of 13 RFFM3482Q Package Drawing y QFN, 16-pin, 3mm x 3mm x 0.45mm Notes: 1. Dimension applies to metallized terminal and is measured 0.25mm and 0.30mm from terminal tip. 2. Dimension represents terminal pull back from pacikage edge up to 0.1mm is acceptable. 3. Coplanarity applies to the exposed heat slug as well as hte terminal. . 6 of 13 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS121108 RFFM3482Q RXBN RXBP GND ANT Pin Out 16 15 14 13 TXB 1 12 BTH SW GND 2 11 RX SW 3 mm x 3 mm x 0.45 mm DS121108 TX SW PAEN 4 9 VB 6 7 8 PDET 5 PABC 10 VB 3 VB BT 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 7 of 13 RFFM3482Q Application Schematic 50 strip J3 -RX J1 TX J2 BT 50 strip 50 strip 16 50 strip 15 14 J4 +RX J5 ANT 13 1 12 BT SW 2 11 RX SW 3 10 TX SW 50 strip L1 3.3nH PAEN 4 VBATT 9 5 6 7 8 C2 1uF C3 1.5nF U1 RF3482 C1 1.5nF PDET VBATT 8 of 13 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. PABC DS121108 RFFM3482Q Evaluation Board Schematic 50 strip J3 -RX J1 TX J2 BT 50 strip 50 strip 16 50 strip 15 14 J5 ANT 13 1 12 BT SW 2 11 RX SW 3 10 TX SW C2 1uF (402) 50 strip L2 3.3nH PAEN J4 +RX 4 9 5 6 7 VBATT 8 U1 RF3482 L1 0 C1 1nF PDET PABC VBATT DS121108 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 9 of 13 RFFM3482Q Theory of Operation The RFFM3482Q FEM is a single-chip integrated front end module (FEM) for high performance WiFi applications in the 2.4GHz to 2.5GHz ISM band. The FEM addresses the need for aggressive size reduction for a typical 802.11b/g/n RF front end design, and greatly reduces the number of components outside of the core chipset. Therefore, the footprint and assembly cost of the overall 802.11b/g/n solution is minimized. The FEM has integrated b/g/n power amplifier, power detector, Rx balun, and Tx filtering. Also, it is capable of switching between WiFi Rx, WiFi Tx, and BTH RX/TX operations. It has low insertion loss at the 2.4GHz to 2.5GHz WiFi and BTH paths. The device is manufactured in a GaAs pHEMT processes, and provided in a 3mm x 3mm x 0.45mm, 16-pin package. This module meets or exceeds the RF front end needs of 802.11b/g/n WiFi RF systems. For best results, the PA circuit layout from the evaluation board should be copied as closely as possible, particularly the ground layout and ground vias. Other configurations may also work, but the design process is much easier and quicker if the layout is copied from the RFFM3482Q evaluation board. There is an indicator pin labeled P1 ID that should be left as a no-connect on the PCB. This pin is directly connected to the ground pad of the IC. For the best performance, it is recommended that voltage and RF lines do not cross under this pin. Gerber files of RFMD PCBA designs can be provided on request. The supply voltage lines should present an RF short to the FEM by using bypass capacitors on the VB traces. The RFFM3482Q is a very easy part to implement, but care in circuit layout and component selection is always advisable when designing circuits to operate at 2.5GHz. Please contact RFMD Sales or Application Engineering for additional data and guidance. The RFFM3482Q is designed primarily for IEEE802.11 b/g/n WiFi applications where the available supply voltage and current are limited. The RFFM3482Q requires a single positive supply voltage (VB), PA enable (PA_EN) supply, efficiency control (PABC), and a positive supply for switch control to simplify bias requirements. The RFFM3842Q FEM also has built in power detection. All inputs and outputs are internally matched to 50 except the WiFi receive path it is deferential with nominal impedance of 100 on each pin. 802.11b/g/n Transmit Path The RFFM3482Q has a typical gain of 33dB from 2.4GHz to 2.5GHz, and delivers 16.5dBm typical output power under 54Mbps OFDM modulation, and 21dBm under 1Mbps 11b modulation. The RFFM3482Q requires a single positive supply of 3.3V to 4.2V to operate at full specifications. PA control for the 802.11b/g/n band is provided through one bias control input pin (PA_EN). The PA_EN pin requires a regulated supply to maintain nominal bias current. In general, the PABC pin controls acts as an efficiency and linearity control pin. The current or voltage applied at this pin may produce higher linear output power, higher operating current, and higher gain. Out of Band Rejection The RFFM3482Q contains basic filtering components to produce bandpass responses for the WiFi transmit path. Due to space constraints inside the module, filtering is limited to a few resonant poles on the RF path. 802.11b/g/n Receive Path The 802.11b/g/n path has a100 differential impedance with a nominal insertion loss of 2.1dB. The RX port return loss is -9dB maximum. Depending on the application, if filtering is required beyond what the RFFM3482Q can achieve then additional external filters will need to be added outside of the RFFM3482Q. 10 of 13 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS121108 RFFM3482Q RFFM3842Q Biasing Instructions: • 802.11b/g/n Transmit (VB compliance = 5.5V, 400mA, PA EN compliance = 2V, ~450mA) • Connect the FEM to a signal generator at the input and a spectrum analyzer at the output. • Bias VB to 3.6V first with PA_EN = 0.0V • Refer to switch operational truth table to set the control lines at the proper levels for WiFi Tx. • Turn on PA_EN to 1.8V (typ.). Be extremely careful not to exceed 3.0V on the PA_EN pin, or the part may exceed device current limits. • Turn on PABC to 1.5mA (or 0.6V). For 11b operation Adjust PABC to 1.8mA. This controls the current drawn by the 802.11b/g/n power amplifier and the idle current should rise to ~115mA ± 20mA for a typical part, but it varies based on the output power desired. • 802.11 b/g/n Receive: to Receive WiFi set the switch control lines per the truth table below. • Bluetooth Receive: to Receive Bluetooth set the switch control lines per the truth table below. IBIAS Table WiFi PABC Standard Modulation Units IEEE 802.11b CCK 1.8 mA IEEE 802.11g 54OFDM 1.5 mA IEEE 802.11n MCS7 1.6 mA DS121108 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 11 of 13 RFFM3482Q PCB Design Requirements PCB Surface Finish The PCB surface finish used for RFMD's qualification process is electroless nickel, immersion gold. Typical thickness is 3 microinch to 8 micro-inch gold over 180 micro-inch nickel. PCB Land Pattern Recommendation * PCB land patterns for RFMD components are based on IPC-7351 standards and RFMD empirical data. The pad pattern shown has been developed and tested for optimized assembly at RFMD. The PCB land pattern has been developed to accommodate lead and package tolerances. Since surface mount processes vary from company to company, careful process development is recommended. PCB Metal Land Pattern 6x 0.250 4x 1.300 8x 0.300 8x 0.300 2x 0.750 6x 0.250 2x 0.250 0.000 2x 0.250 2x 0.750 4x 1.300 2x 0.750 2x 0.250 0.000 2x 0.250 2x 0.750 4x 1.300 4x 1.300 PCB METAL PATTERN 12 of 13 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS121108 RFFM3482Q PCB Solder Mask Pattern Liquid Photo-Imageable (LPI) solder mask is recommended. The solder mask footprint will match what is shown for the PCB metal land pattern with a 2 mil to 3 mil expansion to accommodate solder mask registration clearance around all pads. The center-grounding pad shall also have a solder mask clearance. Expansion of the pads to create solder mask clearance can be provided in the master data or requested from the PCB fabrication supplier. 6x 0.130 4x 1.300 8x 0.180 8x 0.180 2x 0.750 6x 0.130 2x 0.250 0.000 2x 0.250 2x 0.750 4x 1.300 2x 0.750 2x 0.250 0.000 2x 0.250 2x 0.750 4x 1.300 4x 1.300 PCB SOLDER MASK PATTERN Thermal Pad and Via Design The PCB land pattern has been designed with a thermal pad that matches the die paddle size on the bottom of the device. Thermal vias are required in the PCB layout to effectively conduct heat away from the package. The via pattern has been designed to address thermal, power dissipation and electrical requirements of the device as well as accommodating routing strategies. The via pattern used for the RFMD qualification is based on thru-hole vias with 0.203mm to 0.330mm finished hole size on a 0.5mm to 1.2mm grid pattern with 0.025mm plating on via walls. If micro vias are used in a design, it is suggested that the quantity of vias be increased by a 4:1 ratio to achieve similar results. DS121108 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 13 of 13