RF5152 3V TO 3.6V, 2.4GHz TO 2.5GHz LINEAR POWER AMPLIFIER Single Power Supply 3.0V to 3.6V NC VC2 NC 12 RF IN 2 34dB Typical Small Signal Gain Match RF IN 3 2400MHz to 2500MHz Frequency Range RF OUT/ VC3 11 RF OUT Match Match 50 Input and Interstage Matching 10 RF OUT Bias +18dBm, 2.5%EVM (typ.), 130mA@VCC =3.3V NC 4 9 PDETECT 5 VCC Applications 13 IEEE802.11b/g/n WiFi Applications 6 7 8 NC 14 VB3 15 VB1/ VB2 16 NC 1 Features VC1 Package Style: QFN, 16-Pin, 3 mm x 3 mm Functional Block Diagram 2.5GHz ISM Band Applications Product Description Commercial and Consumer Systems The RF5152 is a linear, medium-power, high-efficiency, three-stage amplifier IC designed specifically for battery-powered WiFi applications such as PC cards, mini PCI, and compact flash applications. The device is manufactured on an advanced InGaP Gallium Arsenide Heterojunction Bipolar Transistor (HBT) process, and has been designed for use as the final RF amplifier in 2.5GHz OFDM and other spreadspectrum transmitters. The device is provided in a 3mmx3mm, 16-pin, QFN with a backside ground. The RF5152 is designed to maintain linearity over a wide range of supply voltages and power outputs. Portable Battery-Powered Equipment Spread-Spectrum and MMDS Systems Ordering Information RF5152 RF5152SR RF5152TR7 RF5152PCK-410 Standard 25 piece bag Standard 100 piece reel Standard 2500 piece reel Fully assembled evaluation board tuned for 2.4GHz to 2.5GHz and 5 loose sample pieces Optimum Technology Matching® Applied GaAs HBT GaAs MESFET InGaP HBT SiGe BiCMOS Si BiCMOS SiGe HBT GaAs pHEMT Si CMOS Si BJT GaN HEMT 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. ©2006, RF Micro Devices, Inc. DS110617 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 1 of 10 RF5152 Absolute Maximum Ratings Parameter Rating Unit Supply Voltage -0.5 to +5.0 V Power Control Voltage (VREG) -0.5 to +3.5 VDC DC Supply Current 600 mA Input RF Power +5 dBm -10 to +85 °C -40 to +150 °C Operating Ambient Temperature Storage Temperature Moisture Sensitivity JEDEC Level 2 Parameter Min. Specification Typ. Max. 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. RoHS status based on EUDirective2002/95/EC (at time of this document revision). 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. Unit Condition Temperature=+25°C, VCC =3.3V, VREG =2.8V, Frequency=2450MHz, pulsed at 1% to 100% duty cycle, circuit per evaluation board schematic Overall 2.40 Frequency 2.50 Output Power 18 EVM* 2.5 IP3 33 Gain 32 34 49 50 Gain Variance Input Impedance Output VSWR GHz IEEE802.11g IEEE802.11n IEEE802.11g modulation, 54Mbit/s, 64QAM, OFDM modulation 3.3 % RMS, mean dBm 37 dB -11dBm Pin 1.5 ±dB -15°C to +85°C 51 10:1 Internally Matched Input and Interstage The PA is stable, no spurs above -43dBm Power Detector (P_detect) POUT =8dBm POUT =18dBm 0.7 0.2 0.3 VDC 0.9 1.1 VDC Power Supply Operating Voltage 3.0 3.3 3.6 V VREG (Bias) Voltage (VB1/VB2, VB3) 2.7 2.8 3.0 VDC Current Consumption 85 130 170 mA Quiescent Current 45 75 105 mA VCC =+3.3VDC; RF In=OFF; VREG OFF VREG (Bias) Current (Total) 1 2 6 mA VCC =3.3V -15 -10 dB 300 700 1000 nS Input Return Loss Turn-on Time** RF POUT =+18dBm, VCC =3.3V, 54Mbps OFDM <2.5% EVM Output stable to within 90% of final gain Notes: *The EVM specification is obtained with a signal generator that has an EVM floor of less than 0.7%. **The PA must operate with gated bias voltage input at 1% to 99% duty cycles without any EVM or other parameter degradation. 2 of 10 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS110617 RF5152 Pin 1 2 3 4 Function NC RF IN RF IN NC 5 VCC 6 7 8 9 10 VB1/VB2 VB3 NC PDETECT RF OUT Description Interface Schematic Not connected. May be connected to ground (GND). RF input. See evaluation board schematic for details. RF input. See evaluation board schematic for details. Not connected. Note: Connection of VC1 at this pin will not damage the RF5152 or adversely affect RF5152 performance. Supply voltage for the bias reference and control circuits. May be connected with VC1, VC2 and VC3 with a single-supply voltage as long as VCC does not exceed 3.3VDC in this configuration. Bias current control voltage for the first and second stages. Bias current control voltage for the third stage. Not connected. Provides an output voltage proportional to the output RF level. RF output. The output requires external matching components which consist of a one or two shunt capacitors and a series capacitor for DC blocking. RF OUT BIAS 11 12 RF OUT RF OUT/ VC3 13 14 NC VC2 15 16 NC VC1 Pkg Base GND DS110617 Same as pin 10. See pin 10. RF output and bias for the output stage. The power supply for the output transistor needs to be supplied to this pin. This can be done through a quarter-wave (o/4) length microstrip line that is RF grounded at the other end, or through an RF inductor that supports the required DC current. See evaluation board schematic. Not connected. May be connected to ground (GND). See pin 10. Second stage power supply input. Connect as shown on evaluation board schematic. Not connected. May be connected to ground (GND). First stage power supply input. Connect as shown on evaluation board schematic. Ground connection. The back side of the package should be connected to the ground plane through as short a connection as possible (e.g., PCB vias under the device are required). 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 3 of 10 RF5152 Package Drawitng 0.10 C A -A- 0.05 C 2 PLCS 3.00 0.90 0.85 1.50 TYP 0.70 0.65 0.05 0.00 2 PLCS 0.10 C B 3.00 12° MAX 2 PLCS 0.10 C B -B- 1.37 TYP -C- SEATING PLANE 2.75 SQ 2 PLCS 0.10 C A 0.10 M C A B 0.60 0.24 TYP 0.30 0.18 PIN 1 ID R.20 1.65 SQ. 1.35 0.50 0.30 Dimensions in mm. Shaded lead is pin 1. 0.50 VC1 NC VC2 NC Pin Out 16 15 14 13 NC 1 12 RF OUT/VCC3 RF IN 2 11 RF OUT RF IN 3 10 RF OUT 4 of 10 5 6 7 8 VB1/VB2 VB3 NC 9 PDETECT VCC NC 4 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS110617 RF5152 Theory of Operation and Application Information The RF5152 is a three-stage power amplifier (PA) with a minimum gain of 32dB (34dB typical) in the 2.4GHz to 2.5GHz Industrial, Scientific, and Medical (ISM) band. The RF5152 has a 50 internal input and interstage match. Only the RF5152 output stage requires matching. The RF5152 is designed primarily for IEEE802.11g/n wireless local area network (WiFi) applications where the available supply voltage and current are limited. This amplifier will operate to and below the lowest expected voltage made available by a typical PC Card (PCMCIA or CardBus) slot in a laptop personal computer (PC). The RF5152 maintains required linearity at decreased supply voltages. The RF5152 operates from a single supply voltage of 3.0VDC to 3.6VDC to deliver specified performance. Power control is provided through two (2) bias control input pins (VB1/VB2 and VB3). In most applications these two (2) bias control input pins are connected together and employed as a single control input. The RF5152 has been primarily characterized with a VB voltage of 2.8VDC. However, the RF5152 will operate from a wide range of bias control voltages and within a wide range of frequencies (typically 1800MHz to 2800MHz). If a bias control voltage other than 2.8VDC is preferred or if a different frequency range (other than 2.4GHz to 2.5GHz) is desired, please contact RFMD Sales or Applications Engineering for assistance. Though not difficult to implement to achieve state-of the-art performance, the RF5152 is employed at frequencies greater than 2GHz, where care in circuit layout and component selection is advisable. Of primary concern with RF5152 PCB layout is the selection and placement of output matching components (RF5152PCBA bill of materials (BOM) is available upon request). High-Q (quality factor) capacitors and inductors are not required in every RF5152 based design; however, it is highly recommended that the RF5152PCBA evaluation board BOM be followed exactly for all initial end product designs. Upon initial baseline of RF5152 based PCB performance, less costly (Lower-Q) output matching circuit components may be substituted and evaluated against the initial design performance. RFMD experience indicates that end product FTY improvements more than offset the cost difference between “High-Q” and “Low-Q” components. There is no required matching on the RF5152 input or interstage circuits. Only the RF5152 output stage requires matching allowing the RF5152 to be implemented in applications requiring the fewest end product bill of materials (BOM) parts count and lowest BOM cost. The input stage requires a DC-blocking capacitor. In most cases the capacitor used as part of the RF5152 output matching circuit is also employed to accomplish DC-blocking. The RF5152PCBA evaluation board (available from RF Micro Devices, Inc. (RFMD)) is optimized for 3.3VDC supply input. The output matching capacitor is C10 which is located approximately 120mils from the IC (as shown on the RF5152PCBA Evaluation Board Schematic). The capacitor C10 is selected in value and positioned with reference to 50 transmission line segment TL1. Transmission line segment TL1 should be duplicated as closely as possible in specified length and thickness in any customer PCB layout. Due to PCB material variation (e.g., FR4) and PCB manufacturer variations, the customer may benefit from small adjustments made to the length of TL1 when the RF5152PCBA evaluation board is duplicated to produce an end product PCB design. The initial PCB layout should include exposed ground area near C10 to allow ease of RF5152 output circuit optimization. Smith Chart-based design tools may be used to assist in determining the desired capacitor value and transmission line physical characteristics. Note that the use of a single capacitor output circuit match will result in a more sensitive match and slightly reduced RF5152 bandwidth. In this configuration the RF5152 will exhibit sufficient output spectrum bandwidth to meet IEEE802.11b/g requirements when matched properly. For best results, the RF5152PCBA evaluation board circuit layout should be copied as closely as possible. In particular, the RF5152PCBA evaluation board ground layout, ground vias, and output matching components and location should be copied without deviation. Other PCB layout configurations may provide acceptable RF5152 performance; however, the end product design process will be faster and manufacturing first time yield (FTY) better if the RF5152PCBA evaluation board design is followed. RFMD provides RF5152PCBA design and Gerber files upon request. DS110617 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 5 of 10 RF5152 Evaluation Board Schematic - IEEE802.11b/g VCC P2 VCC L4 10 nH L5 22 nH C9 1 nF 16 15 PDETECT 2 GND P2-3 3 VREG3 P2-4 4 VREG1/2 C6 1 nF R1 C4 1 F 1 P2-1 14 HDR_1x4 L6 6.8 nH Coilcraft 13 1 12 2 11 140 mils P3 P3-1 1 VCC BANANA JACK P4 1 GND BANANA JACK 207 mils from C10 J1 RF IN 3 10 4 9 5 6 7 C10 2.0 pF C11 0.7 pF C12 10 pF PDETECT C5 330 pF 8 P1 5152400 r- C3 1000 pF C13 1000 pF R2 56 VCC 6 of 10 VREG1/2 P1-1 R3 100 VREG3 J2 RF OUT R1 0 27 Application BT, 802.11 b Above and 802.11g 1 VCC 2 GND HDR_1X2 Notes: 1. Populate to tie VREG1/2 and VREG3 together for one power supply. * All measurements are edge to edge from the IC. Components labeled with a “*” may not be needed on the eval board. 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS110617 RF5152 Evaluation Board Layout Board Size 2.0” x 2.0” Board Thickness 0.031”, Board Material FR-4, Multi-Layer DS110617 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 7 of 10 RF5152 PCB Design Requirements PCB Surface Finish The PCB surface finish used for RFMD's qualification process is electroless nickel, immersion gold. Typical thickness is 3inch to 8inch gold over 180inch 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 A = 0.64 x 0.28 (mm) Typ. B = 0.28 x 0.64 (mm) Typ. C = 1.50 (mm) Sq. Dimensions in mm. 1.50 Typ. 0.50 Typ. Pin 16 B B B B Pin 1 Pin 12 A A 0.50 Typ. A A C A A A A 0.75 Typ. 1.50 Typ. 0.55 Typ. B B B B Pin 8 0.55 Typ. 0.75 Typ. Figure 1. PCB Metal Land Pattern (Top View) 8 of 10 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS110617 RF5152 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 2mil to 3mil 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. A = 0.74 x 0.38 (mm) Typ. B = 0.38 x 0.74 (mm) Typ. C = 1.60 (mm) Sq. Dimensions in mm. 1.50 Typ. 0.50 Typ. Pin 16 B B B B Pin 1 0.50 Typ. Pin 12 A A A A C 0.55 Typ. A A A A B 0.55 Typ. B B 0.75 Typ. 1.50 Typ. B Pin 8 0.75 Typ. Figure 2. PCB Solder Mask Pattern (Top View) 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 . DS110617 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 9 of 10 RF5152 ACP versus POUT PDETECT versus POUT -20.0 1.4 -25.0 1.2 -30.0 1.0 -40.0 PDETECT (V) ACP (dBm) -35.0 -45.0 -50.0 -55.0 0.6 0.4 -60.0 ACP1 2400MHz ACP1 2450MHz ACP1 2500MHz 2400MHz ACP2 2450MHz ACP2 2500MHz ACP2 -65.0 -70.0 10.0 0.8 12.0 14.0 16.0 18.0 20.0 22.0 2400MHz 2450MHz 2500MHz 0.2 0.0 0.0 24.0 5.0 10.0 15.0 20.0 Output Power (dBm) Output Power (dBm) EVM versus POUT Operating Current versus POUT 5.0 0.16 4.5 0.14 4.0 0.12 3.5 3.0 EVM (%) ICC (A) 0.10 0.08 2.5 2.0 0.06 1.5 0.04 1.0 2400MHz 2450MHz 2500MHz 0.02 0.0 0.00 0.00 5.00 10.00 Output Power (dBm) 10 of 10 2400MHz 2450MHz 2500MHz 0.5 15.00 20.00 0.0 5.0 10.0 15.0 20.0 Output Power (dBm) 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS110617