ADL5322

700 MHz to 1000 MHz GaAs Matched RF PA Predriver ADL5322 FEATURES Internally matched to 50 Ω input and output Internally biased Operating frequency: 700 MHz to 1000 MHz Gain: 20 dB OIP3: 45 dBm P1 dB: 27 dBm Noise figure: 5 dB 3 mm × 3 mm LFCSP Power supply: 5 V FUNCTIONAL BLOCK DIAGRAM VCC 5 GND 6 GND 7 RFIN 8 BIAS CONTROL OUTPUT MATCH 4 RFOUT 3 GND 2 VCC 1 VCC INPUT MATCH ADL5322 APPLICATIONS CDMA2000, WCDMA, and GSM base station transceivers and high power amplifiers Figure 1. GENERAL DESCRIPTION The ADL5322 is a high linearity GaAs driver amplifier that is internally matched to 50 Ω for operation in the 700 MHz to 1000 MHz frequency range. The amplifier, which has a gain of 20 dB, is specially designed for use in the output stage of a cellular base station radio or as an input preamplifier in a multicarrier base station power amplifier. Matching and biasing are all on-chip. The ADL5322 is available in a Pb-free, 3mm × 3 mm, 8-lead LFCSP package with an operating temperature from −40°C to +85°C. Rev. 0 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 ©2006 Analog Devices, Inc. All rights reserved. 06057-001 ADL5322 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions..............................5 Typical Performance Characteristics ..............................................6 Basic Connections .............................................................................8 CDMA2000 Driving Application................................................8 Evaluation Board ............................................................................ 10 Outline Dimensions ....................................................................... 11 Ordering Guide .......................................................................... 11 REVISION HISTORY 7/06—Revision 0: Initial Version Rev. 0 | Page 2 of 12 ADL5322 SPECIFICATIONS VCC = 5 V, TA = 25°C. Table 1. Parameter FREQUENCY RANGE GAIN vs. Frequency vs. Temperature vs. Voltage vs. Frequency vs. Temperature vs. Voltage vs. Frequency vs. Temperature vs. Voltage P1 dB vs. Frequency vs. Temperature vs. Voltage vs. Frequency vs. Temperature vs. Voltage vs. Frequency vs. Temperature vs. Voltage NOISE FIGURE INPUT RETURN LOSS OUTPUT RETURN LOSS OIP3 vs. Frequency vs. Temperature vs. Voltage vs. Frequency vs. Temperature vs. Voltage vs. Frequency vs. Temperature vs. Voltage POWER SUPPLY Supply Voltage Supply Current Operating Temperature Conditions Frequency = 850 MHz 832 MHz to 870 MHz −40°C to +85°C 5 V, @ 5% (4.75 V to 5.25 V) Frequency = 900 MHz 869 MHz to 894 MHz −40°C to +85°C 5 V, @ 5% (4.75 V to 5.25 V) Frequency = 950 MHz 925 MHz to 960 MHz −40°C to +85°C 5 V, @ 5% (4.75 V to 5.25 V) Frequency = 850 MHz 832 MHz to 870 MHz −40°C to +85°C 5 V, @ 5% (4.75 V to 5.25 V) Frequency = 900 MHz 869 MHz to 894 MHz −40°C to +85°C 5 V, @ 5% (4.75 V to 5.25 V) Frequency = 950 MHz 925 MHz to 960 MHz −40°C to +85°C 5 V, @ 5% (4.75 V to 5.25 V) Frequency = 830 MHz to 960 MHz Frequency = 830 MHz to 960 MHz Frequency = 830 MHz to 960 MHz Carrier spacing = 1 MHz, POUT = 5 dBm per carrier Frequency = 850 MHz 832 MHz to 870 MHz −40°C to +85°C 5 V, @ 5% (4.75 V to 5.25 V) Frequency = 900 MHz 869 MHz to 894 MHz −40°C to +85°C 5 V, @ 5% (4.75 V to 5.25 V) Frequency = 950 MHz 925 MHz to 960 MHz −40°C to +85°C 5 V, @ 5% (4.75 V to 5.25 V) 4.75 POUT = 5 dBm −40 Min 700 19 Typ 20.3 ±0.125 ±1 ±0.1 19.9 ±0.125 ±1 ±0.1 19.6 ±0.125 ±1.1 ±0.1 27.7 ±0.1 ±1 ±0.3 27.9 ±0.1 ±1 ±0.4 27.5 ±0.2 ±1 ±0.4 5 −10 −10 44.8 ±0.25 ±3.0 ±0.5 45.3 ±0.25 ±2.7 ±0.8 44.4 ±0.25 ±2.2 ±0.8 5 320 5.25 +85 Max 1000 21.4 Unit MHz dB dB dB dB dB dB dB dB dB dB dB dB dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm dB dB dB dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm V mA °C 18.6 21.1 18.3 20.8 27.0 27.3 26.7 Rev. 0 | Page 3 of 12 ADL5322 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage, VPOS Input Power (re: 50 Ω) Equivalent Voltage θJC (Soldered) Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Soldering Temperature Rating 6V 18 dBm 1.8 V rms 28.5°C/W 150°C −40°C to +85°C −65°C to +150°C 260°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. ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. 0 | Page 4 of 12 ADL5322 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS VCC 1 VCC 2 GND 3 RFOUT 4 PIN 1 INDICATOR 8 RFIN 7 GND 6 GND 06057-002 ADL5322 TOP VIEW (Not to Scale) 5 VCC Figure 2. Pin Configuration Table 3. Pin Function Descriptions Pin No. 1, 2, 5 3, 6, 7 4 8 N/A Mnemonic VCC GND RFOUT RFIN EP Description Positive 5 V Supply Voltage. Bypass these three pins with independent power supply decoupling networks (100 pF, 10 nF, and 10 μF). Device Ground. RF Output. Internally matched to 50 Ω. RF Input. Internally matched to 50 Ω. Exposed Paddle. Connect to ground plane via a low impedance path. Table 4. S-Parameters Frequency 700.0 MHz 720.0 MHz 740.0 MHz 760.0 MHz 780.0 MHz 800.0 MHz 820.0 MHz 840.0 MHz 860.0 MHz 880.0 MHz 900.0 MHz 920.0 MHz 940.0 MHz 960.0 MHz 980.0 MHz 1.000 GHz ADL5322 (1, 1) 0.210/109.457 0.195/104.437 0.179/99.101 0.165/93.363 0.151/86.953 0.138/79.928 0.125/71.950 0.114/62.829 0.103/52.162 0.095/39.531 0.090/24.952 0.088/9.188 +0.090/−7.350 +0.095/−23.642 +0.104/−39.131 +0.115/−53.477 ADL5322 (1, 2) 0.002/97.018 0.002/93.284 0.002/87.856 0.002/86.137 0.002/78.668 0.002/74.072 0.002/68.940 0.002/62.269 0.002/56.742 0.002/56.696 0.003/43.549 0.003/37.254 0.003/29.904 0.003/24.334 0.003/16.521 0.003/8.139 ADL5322 (2, 1) +11.221/−158.622 +11.108/−166.579 +11.013/−174.596 10.931/177.282 10.856/169.006 10.781/160.613 10.698/152.065 10.605/143.342 10.493/134.489 10.361/125.433 10.210/116.239 10.033/106.889 9.837/97.326 9.614/87.600 9.364/77.609 9.081/67.342 ADL5322 (2, 2) 0.436/150.470 0.392/145.211 0.345/137.443 0.295/133.051 0.242/125.612 0.187/116.434 0.130/102.897 0.079/76.154 0.061/18.090 +0.098/−26.962 +0.153/−46.741 +0.211/−58.300 +0.269/−66.606 +0.324/−73.265 +0.376/−78.914 +0.424/−83.911 Rev. 0 | Page 5 of 12 ADL5322 TYPICAL PERFORMANCE CHARACTERISTICS 22.0 21.5 TEMP = –40°C 21.0 20.5 TEMP = +25°C 5.0 5.6 5.4 5.2 GAIN (dB) 20.0 19.5 TEMP = +85°C 19.0 18.5 18.0 06057-003 NF (dB) 4.8 4.6 4.4 4.2 4.0 700 850 900 FREQUENCY (MHz) 950 1000 800 900 1000 FREQUENCY (MHz) Figure 3. Gain vs. Frequency, VCC = 5 V, TA = −40°C, +25°C, and +85°C 29.0 TEMP = –40°C Figure 6. Noise Figure vs. Frequency, Multiple Devices, VS = 5 V, TA = 25°C 28.4 28.2 28.5 28.0 28.0 VCC = 5.25V VCC = 5V 27.8 P1dB (dBm) TEMP = +25°C P1dB (dBm) 27.6 VCC = 4.75V 27.4 27.2 27.0 26.8 26.6 27.5 27.0 TEMP = +85°C 26.5 06057-004 850 900 FREQUENCY (MHz) 950 1000 850 900 FREQUENCY (MHz) 950 1000 Figure 4. P1 dB vs. Frequency, VCC = 5 V, TA = −40°C, +25°C, and +85°C 47 Figure 7. P1 dB vs. Frequency, VCC = 4.75 V, 5 V, and 5.25 V, TA = 25°C 46.5 46.0 VCC = 5.25V 45.5 TEMP = –40°C 46 45 OIP3 (dBm) OIP3 (dBm) TEMP = +25°C 44 45.0 VCC = 5V 44.5 44.0 VCC = 4.75V 43 42 TEMP = +85°C 06057-005 43.5 43.0 800 850 900 FREQUENCY (MHz) 950 1000 850 900 FREQUENCY (MHz) 950 1000 Figure 5. OIP3 vs. Frequency, VCC = 5 V, TA = −40°C, +25°C, and +85°C Figure 8. OIP3 vs. Frequency, VCC = 4. 75 V, 5 V, and 5.25 V, TA = 25°C Rev. 0 | Page 6 of 12 06057-008 41 800 06057-007 26.0 800 26.4 800 06057-006 17.5 800 ADL5322 6 7 6 5 4 5 FREQUENCY FREQUENCY 06057-009 4 3 2 3 2 1 1 0 43.6 43.8 44.0 44.2 44.4 44.6 44.8 45.0 45.2 OIP3 (dBm) 44.1 44.3 44.5 44.7 44.9 45.1 45.3 45.5 45.7 OIP3 (dBm) Figure 9. Distribution of OIP3 at 850 MHz –6 –8 –10 S22 Figure 11. Distribution of OIP3 at 950 MHz ADL5322 [1, 1] (dB) ADL5322 [2, 2] (dB) –12 –14 –16 –18 –20 –22 –24 06057-010 S11 –26 0.70 0.75 0.80 0.85 0.90 0.95 1.00 FREQUENCY (GHz) Figure 10. Input S11 and Output S22 Return Loss vs. Frequency Rev. 0 | Page 7 of 12 06057-011 0 ADL5322 BASIC CONNECTIONS Figure 14 shows the basic connections for operating the ADL5322. Each of the three power supply lines should be decoupled with 10 μF, 10 nF, and 100 pF capacitors. Pin 3, Pin 6, Pin 7, and the exposed paddle under the device should all be connected to a low impedance ground plane. If multiple ground planes are being used, these should be stitched together with vias under the device to optimize thermal conduction. See recommended land pattern in Figure 12. CDMA2000 DRIVING APPLICATION Figure 13 shows a plot of the spectrum of an ADL5323 driving at 4-carrier CDMA2000 signal at 0 dBm per carrier (total carrier power = 6 dBm), centered at 880 MHz. At 750 kHz and 1.98 MHz offset, adjacent channel power ratios of −59 dBc and −84 dBc (measured in 30 kHz with respect to the 1.22 MHz carrier) are observed. At 4 MHz carrier offset, −73 dBc is measured in a 1 MHz bandwidth (−133 dBm/Hz). Note that the spectrum of the four carriers is slightly rounded due the frequency response of the cavity-tuned filter that was used to filter out the noise and distortion of the source signal. –10 –20 –30 –40 –50 RBW = 30kHz VBW = 300kHz SWT = 2s RF ATT = 20dB MIXER = –10dBm CH PWR = 0.26dBm ACP UP = –59.33dB ALT1 UP = –84.35dB ALT2 UP = –72.74dB (dBm) 06057-013 –60 –70 –80 –90 –100 –110 CENTER 881.875MHz 1MHz/ SPAN 10MHz 06057-014 Figure 12. Recommended Land Pattern Figure 13. Spectrum of 4 Adjacent CDMA2000 Carriers Centered at 880 MHz; Total Carrier Power = 6 dBm (0 dBm per Carrier) C5 100pF RFOUT VCC C1 10µF AGND C3 10nF AGND C2 100pF AGND ADL5322 5 VCC 6 GND 7 GND 8 RFIN EP RFOUT GND VCC VCC 4 3 2 1 AGND VCC C6 100pF AGND C9 100pF AGND C7 10nF AGND C10 10nF AGND C8 10µF AGND VCC 06057-012 AGND C4 100pF RFIN C11 10µF AGND Figure 14. Basic Connections Rev. 0 | Page 8 of 12 ADL5322 ACP1 AND ACP2 – 30kHz RBW (dBc) Figure 15 shows how ACP varies with output power level. The close-in ACP is a function of the signal coding and is unaffected by output headroom at these power levels. The ACP measured at 1.98 MHz carrier offset is −72 dBc at 10 dBm output power (12 dB below the required 60 dBc). At 4 MHz carrier offset, the noise and distortion measured in a 1 MHz bandwidth is −75 dBm at 6 dBm (total) output power (0 dBm per carrier). In a 50 dBm transmitter, this corresponds to an antenna-referred output power of −31 dBm (1 MHz), which is 18 dB below what is required by the CDMA2000 standard. –30 –40 –30 –40 –50 ACP1 (dBc) – 750kHz OFFSET – 30kHz RBW –60 –70 –80 –90 –100 –10 ACP2 (dBc) – 1.98MHz OFFSET – 30kHz RBW ACP3 (dBm) – 4MHz OFFSET – 1MHz RBW –50 –60 –70 –80 –90 –100 10 ACP3 – 1MHz RBW (dBm) 06057-015 –8 –6 –4 –2 0 2 4 6 8 OUTPUT POWER (dBm) Figure 15. CDMA2000 ACP vs. Output Power per Carrier; 4 Adjacent Carriers Rev. 0 | Page 9 of 12 ADL5322 EVALUATION BOARD Figure 17 shows the schematic of the ADL5322 evaluation board. The board is powered by a single supply in the 4.75 V to 5.25 V range. The power supply is decoupled on each of the three power supply pins by 10 μF, 10 nF, and 100 pF capacitors. See Table 5 for exact evaluation board component values. Note that all three VCC pins (Pin 1, Pin 2, and Pin 5) should be independently bypassed as shown in Figure 17 for proper operation. 06057-016 Figure 16. Evaluation Board Component Side View Table 5. Evaluation Board Components Component DUT1 C1, C12, C16 C3, C11, C17 C2, C10, C18 C8, C9, C13, C14, R3 R2, R4 Function Driver amplifier Low frequency bypass capacitors Low frequency bypass capacitors High frequency bypass capacitors Open AC coupling capacitors Default Value ADL5322 10 μF, 0603 10 nF, 0402 100 pF, 0402 Open, 0402 100 pF, 0402 R4 100pF RFOUT VCC C1 10µF AGND C3 10nF AGND C2 100pF AGND C13 OPEN AGND C14 OPEN AGND AGND R2 100pF RFIN C8 OPEN AGND C9 OPEN AGND 5 VCC 6 GND 7 GND 8 RFIN ADL5322/ ADL5323 RFOUT GND VCC VCC DUT1 4 3 2 1 AGND TP2 VCC C10 100pF AGND R3 OPEN C11 10nF AGND C12 10µF AGND TP1 SNS1 VCC C18 100pF GND VCC VCC AGND C17 10nF AGND C16 10µF AGND VCC AGND Figure 17. Evaluation Board Schematic Rev. 0 | Page 10 of 12 06057-017 AGND W1 ADL5322 OUTLINE DIMENSIONS 3.00 BSC SQ 0.60 MAX 0.50 0.40 0.30 PIN 1 INDICATOR 8 1 PIN 1 INDICATOR TOP VIEW 2.75 BSC SQ 0.50 BSC 5 4 1.50 REF 1.89 1.74 1.59 0.90 MAX 0.85 NOM 12° MAX 0.70 MAX 0.65 TYP 0.05 MAX 0.01 NOM 1.60 1.45 1.30 SEATING PLANE 0.30 0.23 0.18 0.20 REF Figure 18. 8-Lead Lead Frame Chip Scale Package [LFCSP_VD] 3 mm × 3 mm Body, Very Thin, Dual Lead (CP-8-2) Dimensions shown in millimeters ORDERING GUIDE Model ADL5322ACPZ-R7 1 ADL5322ACPZ-WP1 ADL5322-EVAL 1 Temperature Range −40°C to +85°C −40°C to +85°C Package Description 8-Lead LFCSP_VD, 7" Tape and Reel 8-Lead LFCSP_VD, Waffle Pack Evaluation Board Package Option CP-8-2 CP-8-2 Branding OP OP Ordering Quantity 1500 50 1 Z = Pb-free part. Rev. 0 | Page 11 of 12 ADL5322 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06057-0-7/06(0) Rev. 0 | Page 12 of 12