2.3 GHz to 4.0 GHz ¼ Watt RF Driver Amplifier ADL5321 Data Sheet FEATURES FUNCTIONAL BLOCK DIAGRAM Operation: 2.3 GHz to 4.0 GHz Gain of 14.0 dB at 2.6 GHz OIP3 of 41.0 dBm at 2.6 GHz P1dB of 25.7 dBm at 2.6 GHz Noise figure: 4.0 dB at 2.6 GHz Power supply voltage: 3.3 V to 5 V Power supply current: 37 mA to 90 mA Dynamically adjustable bias No bias resistor required Thermally efficient, MSL-1 rated SOT-89 package Operating temperature range: −40°C to +105°C ESD rating of ±2 kV (Class 3A) GND (2) ADL5321 2 3 RFIN GND RFOUT 07307-001 BIAS 1 Figure 1. APPLICATIONS Wireless infrastructure Automated test equipment ISM/AMR applications GENERAL DESCRIPTION The ADL5321 also delivers excellent adjacent channel leakage ratio (ACLR) vs. POUT. For output powers up to 10 dBm rms, the ADL5321 adds very little distortion to the output spectrum. At 2.6 GHz, the ACLR is −59 dB and a relative constellation error of −46.6 dB (<0.5% EVM) at an output power of 10 dBm rms. –30 –40 ADJ CH LOW 2.6 GHZ ALT CH LOW 2.6 GHZ ADJ CH LOW 3.5 GHZ ALT CH UP 3.5 GHZ –50 ACLR (dB) The ADL5321 incorporates a dynamically adjustable biasing circuit that allows for the customization of OIP3 and P1dB performance from 3.3 V to 5 V without the need for an external bias resistor. This feature gives the designer the ability to tailor driver amplifier performance to the specific needs of the design. This feature also creates the opportunity for dynamic biasing of the driver amplifier, where a variable supply is used to allow for full 5 V biasing under large signal conditions and then can reduce the supply voltage when signal levels are smaller and lower power consumption is desirable. This scalability reduces the need to evaluate and inventory multiple driver amplifiers for different output power requirements from 22 dBm to 26 dBm output power levels. –60 –70 –80 –90 –10 –5 0 5 10 15 20 POUT (dBm) 07307-125 The ADL5321 is also rated to operate across the wide temperature range of −40°C to +105°C for reliable performance in designs that experience higher temperatures, such as power amplifiers. The 1∕4 watt driver amplifier covers the 2.3 GHz to 4.0 GHz wide frequency range and only requires a few external components to be tuned to a specific band within that wide range. This high performance, broadband RF driver amplifier is well suited for a variety of wired and wireless applications including cellular infrastructure, ISM band power amplifiers, defense equipment, and instrumentation equipment. A fully populated evaluation board is available. Figure 2. WiMAX 64 QAM, 10 MHz Bandwidth, Single Carrier Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2008–2012 Analog Devices, Inc. All rights reserved. ADL5321 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................7 Functional Block Diagram .............................................................. 1 High Temperature and 3.3 V Operation ..................................... 10 General Description ......................................................................... 1 Basic Layout Connections ............................................................. 11 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Soldering Information and Recommended PCB Land Pattern .......................................................................................... 11 Typical Scattering Parameters..................................................... 4 Matching Procedure ................................................................... 12 Absolute Maximum Ratings ............................................................ 5 WiMAX Operation .................................................................... 13 Thermal Resistance ...................................................................... 5 Evaluation Board ............................................................................ 14 ESD Caution .................................................................................. 5 Outline Dimensions ....................................................................... 16 Pin Configuration and Function Descriptions ............................. 6 Ordering Guide .......................................................................... 16 REVISION HISTORY 7/12—Rev. B to Rev. C Change to Title .................................................................................. 1 Changes to Table 1 ............................................................................ 3 Replaced Table 2 ............................................................................... 4 Changes to Table 3 and Table 4 ................................................................. 5 Added Figure 20; Renumbered Sequentially ......................................... 9 Moved High Temperature and 3.3 V Operation Section and added Figure 30 to Figure 32................................................................................ 10 Changes to Soldering Information and Recommended PCB Land Pattern Section and changes to Figure 22 .................................. 11 6/10—Rev. A to Rev. B Changes to General Description Section ...................................... 1 Changes to Operating Temperature Range, Table 3 .................... 4 Added High Temperature Operation Section, Figure 27, Figure 28, and Figure 29 ................................................................................... 13 Changes to Ordering Guide .......................................................... 16 2/09—Rev. 0 to Rev. A Updated Outline Dimensions ....................................................... 15 Changes to Ordering Guide .......................................................... 15 5/08—Revision 0: Initial Version Rev. C | Page 2 of 16 Data Sheet ADL5321 SPECIFICATIONS TA = 25°C, unless otherwise noted. Table 1. Parameter OVERALL FUNCTION Frequency Range FREQUENCY = 2.6 GHz Gain 1 vs. Frequency vs. Temperature vs. Supply Output 1 dB Compression Point, P1dB Output Third-Order Intercept, OIP3 Noise Figure FREQUENCY = 3.5 GHz Gain1 vs. Frequency vs. Temperature vs. Supply Output 1 dB Compression Point, P1dB Output Third-Order Intercept, OIP3 Noise Figure POWER INTERFACE Supply Voltage Supply Current vs. Temperature Power Dissipation 1 Conditions Min 3.3 V Typ 2.3 ±100 MHz −40°C ≤ TA ≤ +85°C 3.2 V to 3.4 V, 4.75 V to 5.25 V Δf = 1 MHz, POUT = 5 dBm per tone ±100 MHz −40°C ≤ TA ≤ +85°C 3.2 V to 3.4 V, 4.75 V to 5.25 V Δf = 1 MHz, POUT = 5 dBm per tone Max Min 4.0 2.3 5V Typ Max Unit 4.0 GHz 12.6 ±0.3 ±0.6 ±0.16 22.0 31 3.5 13.2 14.0 ±0.4 ±0.7 ±0.07 25.7 41 4.0 14.6 dB dB dB dB dBm dBm dB 10.4 ±0.17 ±0.7 ±0.2 24.7 27 4.3 11.1 12.0 ±0.05 ±0.8 ±0.07 25.7 38 4.9 12.9 dB dB dB dB dBm dBm dB 3.3 37 ±4.0 122 4.5 5 90 ±6.0 520 5.5 100 V mA mA mW Pin RFOUT −40°C ≤ TA ≤ +85°C VCC = 3.3 V, VCC = 5 V Guaranteed maximum and minimum specified limits on this parameter are based on six sigma calculations. Rev. C | Page 3 of 16 ADL5321 Data Sheet TYPICAL SCATTERING PARAMETERS VCC = 5 V and TA = 25°C; the effects of the test fixture have been de-embedded up to the pins of the device. Table 2. Frequency (MHz) 2400 2450 2500 2550 2600 2650 2700 2750 2800 2850 2900 2950 3000 3050 3100 3150 3200 3250 3300 3350 3400 3450 3500 3550 3600 3650 3700 3750 3800 3850 3900 3950 4000 S11 Magnitude (dB) −4.54 −4.65 −4.79 −4.92 −5.04 −5.17 −5.33 −5.50 −5.70 −5.94 −6.25 −6.61 −7.03 −7.53 −8.12 −8.78 −9.47 −10.07 −10.45 −10.45 −10.02 −9.25 −8.28 −7.27 −6.34 −5.51 −4.78 −4.14 −3.60 −3.16 −2.78 −2.45 −2.17 Angle (°) 129.60 126.65 123.62 120.44 117.31 114.43 111.78 109.21 106.84 104.85 103.23 101.91 101.06 100.92 101.82 104.04 107.91 113.72 121.55 130.87 140.04 147.61 153.06 156.76 159.01 160.11 160.43 160.36 160.07 159.62 158.95 158.24 157.64 S21 Magnitude (dB) 11.90 11.89 11.88 11.87 11.85 11.83 11.80 11.77 11.74 11.71 11.66 11.62 11.56 11.50 11.40 11.29 11.15 10.97 10.76 10.49 10.17 9.80 9.39 8.92 8.39 7.83 7.26 6.66 6.04 5.43 4.82 4.20 3.60 Angle (°) 21.92 18.30 14.57 10.68 6.80 2.90 −1.06 −5.17 −9.36 −13.64 −18.05 −22.58 −27.18 −31.98 −36.95 −42.09 −47.34 −52.74 −58.29 −63.95 −69.56 −75.16 −80.70 −86.04 −91.20 −96.07 −100.64 −104.97 −108.96 −112.61 −116.07 −119.27 −122.18 Rev. C | Page 4 of 16 S12 Magnitude (dB) −26.72 -26.63 -26.55 −26.48 −26.42 −26.37 −26.34 −26.31 −26.30 −26.30 −26.31 −26.34 −26.37 −26.44 −26.55 −26.68 −26.85 −27.06 −27.32 −27.65 −28.05 −28.49 −29.00 −29.58 −30.20 −30.88 −31.57 −32.29 −33.02 −33.74 −34.44 −35.12 −35.74 Angle (°) −33.83 −36.64 −39.62 −42.70 −45.95 −49.25 −52.65 −56.16 −59.84 −63.64 −67.63 −71.77 −76.13 −80.76 −85.61 −90.69 −95.96 −101.50 −107.30 −113.32 −119.45 −125.70 −132.04 −138.45 −144.79 −151.12 −157.36 −163.69 −170.01 −176.34 177.21 170.60 163.89 S22 Magnitude (dB) −8.18 −8.27 −8.37 −8.45 −8.44 −8.39 −8.33 −8.15 −7.90 −7.63 −7.31 −6.88 −6.44 −6.00 −5.53 −5.03 −4.56 −4.08 −3.61 −3.19 −2.80 −2.43 −2.13 −1.89 −1.66 −1.48 −1.37 −1.27 −1.19 −1.14 −1.12 −1.10 −1.09 Angle (°) −166.39 −169.02 −171.83 −175.32 −179.11 177.31 173.43 169.22 165.46 161.87 158.01 154.58 151.64 148.53 145.65 143.14 140.74 138.36 136.16 133.97 131.77 129.85 128.08 126.22 124.51 123.23 122.16 121.07 120.25 119.79 119.31 118.94 118.86 Data Sheet ADL5321 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 3. Parameter Supply Voltage, VCC Input Power, 50 Ω Impedance Internal Power Dissipation, Paddle Soldered θJC, Junction to Paddle Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Rating 6.5 V 20 dBm 683 mW 28.5°C/W 150°C −40°C to +105°C −65°C to +150°C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 4 lists the junction-to-air thermal resistance (θJA) and the junction-to-paddle thermal resistance (θJC) for the ADL5321. Table 4. Thermal Resistance Package Type 3-Lead SOT-89 1 θJA1 35 θJC2 11 Unit °C/W Measured on Analog Devices evaluation board. For more information about board layout, see the Soldering Information and Recommended PCB Land Pattern section. 2 Based on simulation with JEDEC standard JESD51. ESD CAUTION Rev. C | Page 5 of 16 ADL5321 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS RFIN 1 ADL5321 TOP VIEW (2) GND (Not to Scale) RFOUT 3 07307-002 GND 2 Figure 3. Pin Configuration Table 5. Pin Function Descriptions Pin No. 1 2 3 Exposed Paddle Mnemonic RFIN GND RFOUT Description RF Input. This pin requires a dc blocking capacitor. Ground. Connect this pin to a low impedance ground plane. RF Output and Supply Voltage. DC bias is provided to this pin through an inductor that is connected to the external power supply. RF path requires a dc blocking capacitor. Expose Paddle. Internally connected to GND. Solder to a low impedance ground plane. Rev. C | Page 6 of 16 Data Sheet ADL5321 TYPICAL PERFORMANCE CHARACTERISTICS 42 45 30 OIP3 (–40°C) 40 41 35 40 OIP3 (+85°C) OIP3 (dBm) P1dB 25 20 GAIN 15 28 39 27 38 P1dB (–40°C) 37 26 36 10 2.525 2.550 2.575 2.600 2.625 FREQUENCY (GHz) 2.650 2.675 34 2.500 2.700 Figure 4. Gain, P1dB, OIP3, and Noise Figure vs. Frequency, 2.5 GHz to 2.7 GHz 2.525 25 P1dB (+85°C) P1dB (+25°C) 35 07307-003 NOISE FIGURE 5 2.550 2.575 2.600 2.625 FREQUENCY (GHz) 2.650 2.675 46 15.5 44 15.0 42 –40°C 2.6GHz OIP3 (dBm) 14.5 GAIN (dB) 24 2.700 Figure 7. OIP3 and P1dB vs. Frequency and Temperature, 2.5 GHz to 2.7 GHz 16.0 +25°C 14.0 13.5 +85°C 40 38 2.5GHz 36 13.0 2.7GHz 34 12.5 2.525 2.550 2.575 2.600 2.625 FREQUENCY (GHz) 2.650 2.675 30 –4 2.700 S12 0 6.0 –2 5.5 –4 5.0 –24.6 –6 –24.8 –25.0 –8 S11 –10 S22 NOISE FIGURE (dB) –24.2 –25.4 0 2 4 6 8 10 12 14 16 18 20 22 Figure 8. OIP3 vs. POUT and Frequency, 2.5 GHz to 2.7 GHz S11 (dB) AND S22 (dB) –24.0 –25.2 –2 POUT (dBm) Figure 5. Gain vs. Frequency and Temperature, 2.5 GHz to 2.7 GHz –24.4 07307-007 32 07307-004 12.0 11.5 2.500 P1dB (dBm) 30 0 2.500 +85°C 4.5 +25°C 4.0 3.5 –12 3.0 –14 2.5 –40°C –25.8 –26.0 2.2 2.3 2.4 2.5 2.6 2.7 FREQUENCY (GHz) 2.8 2.9 –16 Figure 6. Reverse Isolation (S12), Input Return Loss (S11), and Output Return Loss (S22) vs. Frequency, 2.2 GHz to 2.9 GHz 2.0 2.2 2.3 2.4 2.5 2.6 FREQUENCY (GHz) 2.7 2.8 2.9 07307-008 –25.6 07307-005 S12 (dB) 29 OIP3 (+25°C) 07307-006 GAIN, P1dB, OIP3, NOISE FIGURE (dB, dBm) OIP3 (5dBm) Figure 9. Noise Figure vs. Frequency and Temperature, 2.2 GHz to 2.9 GHz Rev. C | Page 7 of 16 ADL5321 Data Sheet 42 40 29 OIP3 (–40°C) 39 OIP3 (dBM) P1dB 25 20 15 28 38 OIP3 (+85°C) OIP3 (+25°C) 37 36 27 P1dB (–40°C) 26 35 GAIN 10 34 P1dB (+25°C) NOISE FIGURE 5 3.425 3.450 3.475 3.500 3.525 FREQUENCY (GHz) 3.550 3.575 3.600 P1dB (dBm) 30 25 P1dB (+85°C) 07307-012 35 0 3.400 30 41 OIP3 (5dBm) 40 33 07307-009 GAIN, P1dB, OIP3, NOISE FIGURE (dB, dBm) 45 32 3.400 3.425 3.450 3.475 3.500 3.525 FREQUENCY (MHz) 3.550 3.575 24 3.600 Figure 10. Gain, P1dB, OIP3, and Noise Figure vs. Frequency, 3.4 GHz to 3.6 GHz Figure 13. OIP3 and P1dB vs. Frequency and Temperature, 3.4 GHz to 3.6 GHz 14.0 42 3.4GHz 13.5 40 13.0 –40°C OIP3 (dBm) GAIN (dB) 38 12.5 +25°C 12.0 11.5 3.5GHz 36 3.6GHz 34 +85°C 11.0 32 3.425 3.450 3.475 3.500 3.525 FREQUENCY (GHz) 3.550 3.575 3.600 30 –4 Figure 11. Gain vs. Frequency and Temperature, 3.4 GHz to 3.6 GHz 0 2 4 6 8 10 12 POUT (dBm) 14 16 18 20 22 8.5 8.0 –26 –28 –10 S11 –29 –15 –30 –31 –20 –32 7.5 7.0 NOISE FIGURE (dB) –27 –5 S11 (dB) AND S22 (dB) S22 S12 6.5 +85°C 6.0 5.5 +25°C 5.0 4.5 –40°C 4.0 –25 3.5 –34 –35 3.2 3.3 3.4 3.5 3.6 3.7 FREQUENCY (MHz) 3.8 3.9 –30 4.0 Figure 12. Reverse Isolation (S12), Input Return Loss (S11), and Output Return Loss (S22) vs. Frequency, 3.2 GHz to 4.0 GHz 3.0 2.5 3.2 3.3 3.4 3.5 3.6 3.7 FREQUENCY (GHz) 3.8 3.9 Figure 15. Noise Figure vs. Frequency and Temperature, 3.2 GHz to 4.0 GHz Rev. C | Page 8 of 16 4.0 07307-014 –33 07307-011 S12 (dB) –2 Figure 14. OIP3 vs. POUT and Frequency, 3.4 GHz to 3.6 GHz 0 –25 07307-013 10.0 3.400 07307-010 10.5 ADL5321 30 25 25 20 15 20 15 42.6 OIP3 (dBM) 07307-015 42.4 42.2 42.0 41.8 41.6 41.4 41.2 41.0 40.8 40.6 0 40.4 0 40.2 5 40.0 5 39.8 10 39.6 10 3.76 3.80 3.84 3.88 3.92 3.96 4.00 4.04 4.08 4.12 4.16 NF (dB) Figure 16. OIP3 Distribution at 2.6 GHz 07307-018 PERCENTAGE (%) 30 39.4 PERCENTAGE (%) Data Sheet Figure 19. Noise Figure (NF) Distribution at 2.6 GHz 35 110 105 25 SUPPLY CURRENT (mA) PERCENTAGE (%) 30 20 15 10 100 5.25V 95 90 5.0V 85 4.75V 80 5 P1dB (dBM) Figure 17. P1dB Distribution at 2.6 GHz 0 10 20 30 40 TEMPERATURE (°C) 50 60 70 80 07307-019 70 –40 –30 –20 –10 07307-016 27.0 26.8 26.6 26.4 26.2 26.0 25.8 25.6 25.4 25.2 25.0 24.8 24.6 75 0 Figure 20. Supply Current vs. Temperature and Supply Voltage (Using 2.6 GHz Matching Components) 220 35 200 30 SUPPLY CUURENT (mA) 25 20 15 10 160 140 120 100 5V 80 60 14.25 20 –6 –4 –2 0 07307-017 GAIN (dB) 14.20 14.15 14.10 14.05 14.00 13.95 13.90 13.85 13.80 13.75 0 3.3V 40 2 4 6 8 10 12 14 16 18 20 22 24 26 28 POUT (dBm) Figure 21. Supply Current vs. POUT 3.3 V and 5 V (2.6 GHz Matching Components) Figure 18. Gain Distribution at 2.6 GHz Rev. C | Page 9 of 16 07307-120 5 13.70 PERCENTAGE (%) 180 ADL5321 Data Sheet HIGH TEMPERATURE AND 3.3 V OPERATION The ADL5321 has excellent performance at temperatures above 85°C. At 105°C, the gain and P1dB decrease by 0.2 dB, the OIP3 decreases by 0.1 dB, and the noise figure increases by 0.31 dB compared with the data at 85°C. Figure 25 through Figure 27 show the performance at 105°C. 16.0 15.0 15.5 14.5 25°C 85°C 105°C 15.0 14.0 13.5 –40°C GAIN (dB) GAIN (dB) 14.5 14.0 13.5 13.0 25°C 12.5 85°C 12.0 13.0 105°C 11.5 12.5 11.0 12.0 2.575 2.600 2.625 2.650 2.675 2.700 FREQUENCY (GHz) 2.525 2.555 2.575 2.600 2.625 2.650 2.675 2.700 FREQUENCY (GHz) Figure 22. Gain vs. Frequency and Temperature, 5 V Supply, 2.5 GHz to 2.7 GHz 25°C 85°C 105°C 27 33 31 OIP3 (+105°C) OIP3 (+85°C) 32 26 OIP3 30 39 29 38 28 37 27 31 30 26 35 25 24 29 23 P1dB (25°C) P1dB (–40°C) P1dB 36 25 OIP3 (–40°C) OIP3 (+25°C) OIP3 (dBm) 40 P1dB (dBm) 41 OIP3 (dBm) Figure 25. Gain vs. Frequency and Temperature, 3.3 V Supply, 2.5 GHz to 2.7 GHz 32 42 07307-130 2.550 10.0 2.500 28 P1dB (dBm) 2.525 07307-030 10.5 11.5 2.500 22 27 21 P1dB (+85°C) P1dB (+105°C) 2.550 2.575 2.600 2.625 2.650 2.675 24 2.700 26 2.500 FREQUENCY (GHz) 2.525 2.555 2.575 2.600 2.625 2.650 2.675 20 2.700 07307-131 2.525 07307-031 34 2.500 FREQUENCY (GHz) Figure 26. OIP3 and P1dB vs. Frequency and Temperature, 3.3 V Supply, 2.5 GHz to 2.7 GHz Figure 23. OIP3 and P1dB vs. Frequency and Temperature, 5 V Supply, 2.5 GHz to 2.7 GHz 7 5.5 6 NOISE FIGURE (dB) 4.5 4.0 2.55 2.60 2.65 FREQUENCY (GHz) 105°C 85°C 25°C 4 –40°C 3 2 25°C 85°C 105°C 3.0 2.50 5 2.70 Figure 24. Noise Figure vs. Frequency and Temperature, 5 V Supply, 2.5 GHz to 2.7 GHz 1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 FREQUENCY (GHz) Figure 27. Noise Figure vs. Frequency and Temperature, 3.3 V Supply 2.5 GHz to 2.7 GHz Rev. C | Page 10 of 16 2.9 07307-132 3.5 07307-032 NOISE FIGURE (dB) 5.0 Data Sheet ADL5321 BASIC LAYOUT CONNECTIONS The basic connections for operating the ADL5321 are shown in Figure 28. SOLDERING INFORMATION AND RECOMMENDED PCB LAND PATTERN Table 6 lists the required matching components. Capacitors C1, C2, C3, C4, and C7 are Murata GRM155 series (0402 size) and Inductor L1 is a Coilcraft 0603CS series (0603 size). For all frequency bands, the placement of C3 and C7 is critical. From 2500 MHz to 2700 MHz, the placement of C1 is also important. Table 7 lists the recommended component placement for various frequencies. Figure 29 shows the recommended land pattern for the ADL5321. To minimize thermal impedance, the exposed paddle on the SOT-89 package underside is soldered down to a ground plane along with (GND) Pin 2. If multiple ground layers exist, they should be stitched together using vias. For more information on land pattern design and layout, refer to the AN-772 Application Note, A Design and Manufacturing Guide for the Lead Frame Chip Scale Package (LFCSP). A 5 V dc bias is supplied through L1 that is connected to RFOUT (Pin 3). In addition to C4, 10 nF and 10 μF power supply decoupling capacitors are also required. The typical current consumption for the ADL5321 is 90 mA. GND This land pattern, on the ADL5321 evaluation board, provides a measured thermal resistance (θJA) of 35°C/W. To measure θJA, the temperature at the top of the SOT-89 package is found with an IR temperature gun. Thermal simulation suggests a junction temperature 10°C higher than the top of package temperature. With additional ambient temperature and I/O power measurements, θJA could be determined. VCC (2) GND C6 10µF C5 10nF 1.80mm C41 ADL5321 1 2 3 λ22 λ32 C71 1 λ42 C2 RFOUT C31 3.48mm 07307-026 λ12 RFOUT C11 GND RFIN RFIN L11 1SEE TABLE 5 FOR FREQUENCY SPECIFIC COMPONENTS. 2SEE TABLE 6 FOR RECOMMENDED COMPONENT SPACING. 0.20mm 5.56mm Figure 28. Basic Connections 0.86mm 0.62mm 07307-051 1.27mm 1.50mm 3.00mm Figure 29. Recommended Land Pattern Table 6. Recommended Components for Basic Connections Frequency (MHz) 2500 to 2700 3400 to 3850 C1 (pF) 1.0 10 C2 (pF) 10 10 C3 (pF) 1.2 1.2 C4 (pF) 10 10 C7 (pF) Open 1.0 L1 (nH) 9.5 9.5 Table 7. Matching Component Spacing Frequency (MHz) 2500 to 2700 3400 to 3850 λ1 (mils) 240 90 λ2 (mils) 75 35 Rev. C | Page 11 of 16 λ3 (mils) 89 40 λ4 (mils) 325 416 ADL5321 Data Sheet FIXED LOAD PULL FREQ = 2.6000 GHz IP3 MAX = 41.70dBm AT 0.4705< 86.63 10 CONTOURS, 1.00dBm STEP (32.00 TO 41.00dBm) POUT MAX = 14.16dBm AT 0.6100< 136.24 10 CONTOURS, 1.00dBm STEP (5.00 TO 14.00dBm) GT MAX = 15.02dBm AT 0.6100< 136.24 10 CONTOURS, 1.00dBm STEP (6.00 TO 15.00dB) 0.404< 93.05 Figure 30. Load-Pull Contours, 2600 MHz From the data shown in Table 8 and Table 9, it becomes clear that maximum gain and maximum OIP3 do not occur at the same impedance. This can also be seen on the load-pull contours in Figure 30 through Figure 32. Therefore, output matching generally involves compromising between gain and OIP3. In addition, the load-pull plots demonstrate that the quality of the output impedance match must be compromised to optimize gain and/ or OIP3. In most applications where line lengths are short and where the next device in the signal chain presents a low input return loss, compromising on the output match is acceptable. FIXED LOAD PULL FREQ = 3.5000 GHz POUT MAX = 14.96dBm AT 0.7686< 162.58 10 CONTOURS, 1.00dBm STEP (5.00 TO 14.00dBm) GT MAX = 14.02dBm AT 0.7686< 162.58 10 CONTOURS, 1.00dBm STEP (5.00 TO 14.00dB) SPECS: OFF 0.875< –147.48 Figure 31. Load-Pull Contours, 3500 MHz For example, to optimize the ADL5321 for optimum OIP3 and gain at 2300 MHz, use the following steps: 2. 3. 4. Install the recommended tuning components for a 2500 MHz to 2700 MHz tuning band, but do not install C3 and C7. Connect the evaluation board to a vector network analyzer so that input and output return loss can be viewed simultaneously. Starting with the recommended values and positions for C3 and C7, adjust the positions of these capacitors along the transmission line until the return loss and gain are acceptable. Push-down capacitors that are mounted on small sticks can be used in this case as an alternative to soldering. If moving the component positions does not yield satisfactory results, then the values of C3 and C7 should be increased or decreased (most likely increased in this case because the user is tuning for a lower frequency). Repeat the process. LOAD IP3 MAX = 41.37dBm AT 0.6911< 142.11 10 CONTOURS, 1.00dBm STEP (32.00 TO 41.00dBm) To adjust the output match for operation at a different frequency or if a different trade-off between OIP3, gain, and output impedance is desired, the following procedure is recommended. 1. 07307-022 SPECS: OFF FIXED LOAD PULL FREQ = 3.6000 GHz LOAD IP3 MAX = 41.29dBm AT 0.7070< 140.65 10 CONTOURS, 1.00dBm STEP (32.00 TO 41.00dBm) POUT MAX = 15.63dBm AT 0.7057< 161.81 10 CONTOURS, 1.00dBm STEP (6.00 TO 15.00dBm) GT MAX = 13.44dBm AT 0.7057< 161.81 10 CONTOURS, 1.00dBm STEP (4.00 TO 13.00dB) SPECS: OFF Once the desired gain and return loss are realized, OIP3 should be measured. It may be necessary to go back and forth between return loss/gain and OIP3 measurements (probably compromising most on output return loss) until an acceptable compromise is achieved. Rev. C | Page 12 of 16 07307-024 The ADL5321 is designed to achieve excellent gain and IP3 performance. To achieve this, both input and output matching networks must present specific impedance to the device. The matching components listed in Table 6 were chosen to provide −14 dB input return loss while maximizing OIP3. The load-pull plots (see Figure 30, Figure 31, and Figure 32) show the load impedance points on the Smith chart where optimum OIP3, gain, and output power can be achieved. These load impedance values (that is, the impedance that the device sees when looking into the output matching network) are listed in Table 8 and Table 9 for maximum gain and maximum OIP3, respectively. The contours show how each parameter degrades as it is moved away from the optimum point. LOAD 07307-023 MATCHING PROCEDURE Figure 32. Load-Pull Contours, 3600 MHz Data Sheet ADL5321 –30 Table 8. Load Conditions for GainMAX Gain MAX (dB) 15.02 14.02 13.44 Table 9. Load Conditions for OIP3MAX Frequency (MHz) 2600 3500 3600 ΓLoad (Magnitude) 0.4705 0.6911 0.7070 ΓLoad (°) 86.63 142.11 140.65 –50 –60 –70 IP3 MAX (dBm) 41.7 41.37 41.29 –80 –90 –10 –5 0 5 10 15 07307-025 ΓLoad (°) 136.24 162.58 161.81 ADJ CH LOW 2.6 GHZ ALT CH LOW 2.6 GHZ ADJ CH LOW 3.5 GHZ ALT CH UP 3.5 GHZ –40 ACLR (dB) Frequency (MHz) 2600 3500 3600 ΓLoad (Magnitude) 0.6100 0.7686 0.7057 20 POUT (dBm) Figure 33. ACLR vs. POUT, WiMAX 64 QAM, 10 MHz Bandwidth, Single Carrier Figure 33 shows a plot of adjacent channel leakage ratio (ACLR) vs. POUT for the ADL5321. The signal type used is a WiMAX, 64 QAM, single carrier with a 10 MHz channel bandwidth. This signal is generated by a WiMAX-enabled source and followed with suitable band-pass filtering. The band-pass filter helps reduce the adjacent and alternate channel noise and distortion out of the signal generator down to −63 dB in the adjacent channels and −76 dB in the alternate channels at 2.6 GHz and −60 dB at 3.5 GHz. Below an output power of 7 dBm, measured ADL5321 output spectral performance is limited by the signal quality from the signal source used (−63 dB at 2.6 GHz and −60 dB at 3.5 GHz). At high power operation, input power to the ADL5321 is 1 dBm for 15 dBm output power and the source ACLR is −60.2 dB. It is expected that with a better signal source, the ADL5321 output spectral quality improves further, especially at output power levels ≤10 dBm. For instance, the ADL5373 quadrature modulator measured ACLR is −69 dB for an output power of −10 dBm. 0 –5 –10 RCE/EVM (dB) –15 –20 –25 –30 3.5 GHz 2.6 GHz –35 –40 07307-126 WiMAX OPERATION –45 –50 –20 –15 –10 –5 0 5 10 15 20 POUT (dBm) Figure 34. RCE/EVM vs. POUT, WiMAX 64 QAM, 10 MHz Bandwidth, Single Carrier For output powers up to 10 dBm rms, the ADL5321 adds very little distortion to the output spectrum. At 2.6 GHz, the ACLR is −59 dB and a relative constellation error of −46.6 dB (<0.5% EVM) at an output power of 10 dBm rms. Rev. C | Page 13 of 16 ADL5321 Data Sheet EVALUATION BOARD are also provided in Table 10. The recommended placement for these components is provided in Table 11. The inputs and outputs should be ac-coupled with appropriately sized capacitors. DC bias is provided to the amplifier via an inductor connected to the RFOUT pin. A bias voltage of 5 V is recommended. The schematic of the ADL5321 evaluation board is shown in Figure 35. This evaluation board uses 25 mil wide traces and is made from IS410 material (lead-free version of FR4). The evaluation board comes tuned for operation in the 2500 MHz to 2700 MHz tuning band. Tuning options for other frequency bands GND VCC (2) GND C6 10µF C5 10nF C4 10pF 2 L1 9.5nH 3 λ4 λ3 λ2 C7 OPEN C2 10pF C3 1.2pF RFOUT 07307-127 1 RFOUT λ1 GND RFIN C1 1.0pF RFIN ADL5321 Figure 35. Evaluation Board, 2500 MHz to 2700 MHz Table 10. Evaluation Board Configuration Options Component C1, C2 Function AC coupling capacitors C4, C5, C6 Power supply bypassing capacitors L1 C3, C7 DC bias inductor Tuning capacitors VCC, GND Power supply connections 2500 MHz to 2700 MHz C1 = 0402, 1.0 pF C2 = 0402, 10 pF C4 = 0603, 10 pF C5 = 0603, 10 nF C6 = 1206, 10 µF 0603, 9.5 nH C3 = 0402, 1.2 pF C7 = 0402, open VCC, red test loop GND, black test loop 3400 MHz to 3850 MHz C1 = 0402, 10 pF C2 = 0402, 10 pF C4 = 0603, 10 pF C5 = 0603, 10 nF C6 = 1206, 10 µF 0603, 9.5 nH C3 = 0402, 1.2 pF C7 = 0402, 1.0 pF VCC, red test loop GND, black test loop Table 11. Recommended Component Spacing on Evaluation Board Frequency (MHz) 2500 to 2700 3400 to 3850 λ1 (mils) 240 90 λ2 (mils) 75 35 Rev. C | Page 14 of 16 λ3 (mils) 89 40 λ4 (mils) 325 416 Data Sheet ADL5321 10µF 10µF 10 nF 10 pF 9.5 nH 1 2 3 10 pF C2 10pF C1 10 pF C3 1.2 pF 9.5 nH 1 2 3 C2 10 pF C3 1.2 pF C7 07307-028 07307-029 C1 1.0 pF 10 nF (2) (2) Figure 36. Evaluation Board Layout and Default Component Placement for Operation from 2500 MHz to 2700 MHz (Note: C7 Is Not Placed) Rev. C | Page 15 of 16 Figure 37. Evaluation Board Layout and Component Placement for Operation from 3400 MHz to 3850 MHz ADL5321 Data Sheet OUTLINE DIMENSIONS *1.75 1.55 (2) 4.25 3.94 1 2 2.60 2.30 3 1.20 0.75 1.50 TYP 3.00 TYP 2.29 2.14 4.60 4.40 1.60 1.40 0.44 0.35 END VIEW *0.52 0.32 *COMPLIANT TO JEDEC STANDARDS TO-243 WITH THE EXCEPTION OF DIMENSIONS INDICATED BY AN ASTERISK. 12-18-2008-B *0.56 0.36 Figure 38. 3-Lead Small Outline Transistor Package [SOT-89] (RK-3) Dimensions shown in millimeters ORDERING GUIDE Model 1 ADL5321ARKZ-R7 ADL5321-EVALZ 1 Temperature Range −40°C to +105°C Package Description 3-Lead SOT-89, 7“ Tape and Reel Evaluation Board Z = RoHS Compliant Part. ©2008–2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07307-0-7/12(C) Rev. C | Page 16 of 16 Package Option RK-3