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Download RF5622 3.0V TO 3.6V, 2.4GHz TO 2.5GHz LINEAR POWER AMPLIFIER Features
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RF5622 3.0V TO 3.6V, 2.4GHz TO 2.5GHz LINEAR POWER AMPLIFIER VCC VC1 Package Style: QFN, 8-Pin, 2.2x2.2x0.45mm 8 7 Features RF IN 1 6 VC2 Input Match 2Fo Filter VREG 2 Bias Circuit 3 Applications IEEE802.11b/g/n WiFi Applications 2.5GHz ISM Band Applications Commercial and Consumer Systems Portable Battery-Powered Equipment Spread-Spectrum and MMDS Systems Interstage Match Power Detector 5 RF OUT 4 NC Single Power Supply 3.0V to 3.6V 30dB Typical Gain, Input Matched to 50 2.4GHz to 2.5GHz Frequency Range 11g POUT =+18dBm@3% Typ EVM, 95mA PDETECT Functional Block Diagram Product Description The RF5622 is a linear, medium-power, high-efficiency, two-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 spread-spectrum transmitters. The device is provided in a 2.2mmx2.2mmx0.45mm, 8-pin, QFN with a backside ground. The RF5622 is designed to maintain linearity over a wide range of supply voltage and power output. The RF5622 also has built-in power detector and incorporates the input and interstage matching components internally which reduces the component count used externally and makes it easier to incorporate on any design. Ordering Information RF5622 RF5622SR RF5622TR7 RF5622PCK-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 piece loose samples 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. DS110619 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. www.BDTIC.com/RFMD 1 of 9 RF5622 Absolute Maximum Ratings Parameter Rating Unit Supply Voltage -0.5 to +5.0 VDC Power Control Voltage (VREG) -0.5 to +3.3 V DC Supply Current 240 mA Input RF Power +5 dBm Extreme Operating Temperature -30 to +85 °C Full Specification Temperature Range -15 to +85 °C -40 to +150 °C Storage Temperature 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. 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. JEDEC Level 2 Parameter Min. Specification Typ. Max. Unit Condition Temperature=+25°C, VCC =3.3V, VREG =2.8V pulsed at 1% to 100% duty cycle, Frequency=2450MHz, circuit per evaluation board schematic, unless otherwise specified IEEE802.11g 2.4 Frequency Output Power EVM* 2.5 GHz IEEE802.11g IEEE802.11n 13 dBm At max data rate, OFDM modulation RMS, mean, VCC =2.8V 18 dBm At max data rate, OFDM modulation RMS, mean, VCC =3.3V 3.0 Gain 26 4.0 30 Gain Variance Over Temperature 1.5 % RMS, mean dB At +18dBm RF POUT and 54Mbps ±dB -30°C to +85°C, 2.4GHz to 2.5GHz Power Detector POUT =8dBm 0.320 V POUT =18dBm 1.2 V Power Supply 2.8 3.3 3.6 VDC VREG Input Voltage 2.75 2.8 3.0 VDC Output VSWR 10:1 Input Return Loss -15 Turn-on Time** 0.5 Second Harmonic -10 Operating No damage to the PA dB 1.8 S -43 dBm Output stable to within 90% of final gain Fundamental frequency is between 2.4GHz and 2.5GHz; RFPOUT =+18dBm, 1Mbps CCK IEEE802.11b modulation Current Consumption Quiescent Current 55 mA Data rate @<3.5% EVM RMS, mean Operating Current 70 mA POUT =+13dBm, VCC =2.8V 95 mA POUT =+18dBm, VCC =3.3V, diff. output match required VCC =+3.3VDC IREG Current Shutdown Current 2 6 mA 0.5 10 A 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 9 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. www.BDTIC.com/RFMD DS110619 RF5622 Pin 1 2 3 4 5 6 Function RF IN VREG PDETECT or NC NC RF OUT VC2 7 VC1 8 VCC Pkg Base GND Description RF input. Input is matched to 50 and DC block is provided internally. Bias current control voltage for the first and second amplifier stage. Power detector which provides an output voltage proportional to the RF output power level. May need external decoupling capacitor for load sensitivity. May be left unconnected if function is not desired. This pin may be left unconnected or may be connected to ground. RF output. A DC blocking capacitor may be needed as this pin of the PA is a DC short to ground. Voltage supply for second stage amplifier. External low frequency bypass capacitors should be connected if no other low frequency decoupling is employed. Voltage supply for the first amplifier stage. External low frequency bypass capacitors should be connected if no other low frequency decoupling is employed. Supply voltage for the bias reference and control circuit. May be connected with VC1 and VC2 (with a single supply voltage). The 56pF bypass capacitor on the VCC line should be placed as close as possible to the IC. The center metal base of the QFN package provides DC and RF ground as well as heat sink for the amplifier. Package Drawing 0.50 0.40 2 PLCS 0.10 C INDEX AREA 0.152 REF 0.10 C 2 PLCS 2.20 0.05 0.00 -B-A- 2.20 SEATING PLANE 0.65 0.10 MAX 1.20 TYP 1.00 Dimensions in mm. Shaded lead is pin 1. DS110619 -C- 0.31 0.21 0.28 0.18 0.10 M C A B 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. www.BDTIC.com/RFMD 3 of 9 RF5622 4 of 9 VCC VC1 Pin Out 8 7 VREG 2 5 RF OUT 3 4 NC 6 VC2 PDETECT RF IN 1 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. www.BDTIC.com/RFMD DS110619 RF5622 Theory of Operation and Application Information The RF5622 is a two-stage power amplifier (PA) with a typical gain of 30dB in the 2.4GHz to 2.5GHz ISM band. The RF5622 has integrated input and interstage matching components thus allowing a minimal bill of material (BOM) part count in end applications. The RF5622 is designed primarily for IEEE802.11b/g/n 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 PCMCIA slot in a laptop PC, and will maintain required linearity at decreased supply voltages. The device is provided in a 2mmx2mmx0.45mm, 8-pin, QFN with backside ground. The RF5622 requires only a single positive supply of 3.3V nominal to operate to full specifications. Power control is provided through one bias voltage pin (VREG). The input DC blocking cap is provided internally, the output of the PA is not internally DC blocked. The evaluation board circuit (available from RF Micro Devices, Inc. (RFMD)) is optimized for 3.3VDC applications. For best performance, it is important to duplicate (as closely as possible) the layout of the evaluation board. The RF5622 has primarily been characterized with a voltage on VREG of 2.8VDC. If you prefer to use a bias voltage that is significantly different than 2.8VDC, or a different frequency than the recommended frequency range, contact RFMD Sales or Applications Engineering for additional data and guidance. 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 RF5622 evaluation board. Gerber files of RFMD PCBA designs can be provided on request. The RF5622 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. The RF5622 evaluation board layout and schematic are available using 0201 (US) size components which will help shrink the overall size of the total area of the PA and components of the intended design. If you prefer to use a supply or bias voltage that is significantly different than what is specified, or a different frequency than the recommended frequency range, contact RFMD Sales or Applications Engineering for additional data and guidance. DS110619 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. www.BDTIC.com/RFMD 5 of 9 RF5622 Application Schematic VCC 0.1 F 56 pF* *Place as close as possible to the part. 1 uF* 22 nH 8 7 8.2 nH 50 strip RF IN 1 6 Input Match Interstage Match 2Fo Filter 1.0 nH VREG 2 Bias Circuit Power Detector 10pF 5 RF OUT 1.8 pF 3 4 5622400, r.3 330 pF *Note: The EVM floor may increase if a smaller value bypass capacitor is used on the VCC line into pin 6. PDETECT 6 of 9 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. www.BDTIC.com/RFMD DS110619 RF5622 Evaluation Board Schematic (PROTOTYPE) IEEE802.11b/g VCC C1 0.1 F L1 22 nH C2 56 pF C3 1 F 8 7 L2 8.2 nH 50 strip J3 RF IN 1 6 Input Match Interstage Match R1 0 VREG 1.0 nH 2 Bias Circuit 3 Power Detector C5 1.8 pF 4 C4 1 nF 5622400, r.1 Note: C2 should be placed as close to the part as possible for the best performance. R2 0 C6 330 pF PDETECT P1 P2 1 GND P1-2 2 VCC P1-3 3 VCC CON3 DS110619 J4 RF OUT 5 1 GND P2-2 2 PDETECT P2-3 3 VREG CON3 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. www.BDTIC.com/RFMD 7 of 9 RF5622 Evaluation Board Layout Board Size 1.2” x 1.2” Board Thickness 0.032”, Board Material FR-4 8 of 9 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. www.BDTIC.com/RFMD DS110619 RF5622 VCC=2.8V: EVM versus POUT 6.0 6.0 5.0 5.0 4.0 4.0 EVM (%) EVM (%) VCC=3.3V: EVM versus POUT 3.0 3.0 2.0 2.0 1.0 1.0 Vcc=3.3V, 2400MHz Vcc=3.3V, 2450MHz Vcc=3.3V, 2500MHz Vcc=3.3V, 2400MHz Vcc=3.3V, 2450MHz Vcc=3.3V, 2500MHz 0.0 0.0 0.0 5.0 10.0 15.0 0.0 20.0 5.0 10.0 20.0 VCC=3.3V: ICC versus POUT Gain versus Frequency POUT=+18dBm 32.0 15.0 Output Power (dBm) Output Power (dBm) 0.120 0.108 31.0 0.096 0.084 0.072 29.0 ICC (mA) Gain (dB) 30.0 28.0 0.060 0.048 0.036 27.0 0.024 2400MHz 2450MHz 2500MHz 26.0 0.012 Vcc=3.3V Vcc=2.8V 0.000 25.0 2400.0 2425.0 2450.0 2475.0 0.000 2500.0 5.000 10.000 15.000 20.000 Output Power (dBm) Frequency (MHz) PDETECT versus POUT VCC=2.8V: ICC versus POUT 1.2 0.120 1.1 0.108 1.0 0.096 0.9 Power Detector (V) 0.084 ICC (mA) 0.072 0.060 0.048 0.8 0.7 0.6 0.5 0.4 0.036 0.3 0.024 0.2 2400MHz 2450MHz 2500MHz 0.012 2400MHz 2450MHz 2500MHz 0.1 0.0 0.000 0.0 2.0 4.0 6.0 8.0 10.0 12.0 Output Power (dBm) DS110619 14.0 16.0 18.0 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 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]. www.BDTIC.com/RFMD 9 of 9