Adl5350

Transcript

LF to 4 GHz High Linearity Y-Mixer ADL5350 Broadband radio frequency (RF), intermediate frequency (IF), and local oscillator (LO) ports Conversion loss: 6.8 dB Noise figure: 6.5 dB High input IP3: 25 dBm High input P1dB: 19 dBm Low LO drive level Single-ended design: no need for baluns Single-supply operation: 3 V @ 19 mA Miniature, 2 mm × 3 mm, 8-lead LFCSP RoHS compliant APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GND RF INPUT OR OUTPUT IF OUTPUT OR INPUT ADL5350 RF IF 3V GND VPOS LO LO INPUT 05615-001 FEATURES Figure 1. Cellular base stations Point-to-point radio links RF instrumentation GENERAL DESCRIPTION The ADL5350 is a high linearity, up-and-down converting mixer capable of operating over a broad input frequency range. It is well suited for demanding cellular base station mixer designs that require high sensitivity and effective blocker immunity. Based on a GaAs pHEMT, single-ended mixer architecture, the ADL5350 provides excellent input linearity and low noise figure without the need for a high power level LO drive. In 850 MHz/900 MHz receive applications, the ADL5350 provides a typical conversion loss of only 6.7 dB. The input IP3 is typically greater than 25 dBm, with an input compression point of 19 dBm. The integrated LO amplifier allows a low LO drive level, typically only 4 dBm for most applications. The high input linearity of the ADL5350 makes the device an excellent mixer for communications systems that require high blocker immunity, such as GSM 850 MHz/900 MHz and 800 MHz CDMA2000. At 2 GHz, a slightly greater supply current is required to obtain similar performance. The single-ended broadband RF/IF port allows the device to be customized for a desired band of operation using simple external filter networks. The LO-to-RF isolation is based on the LO rejection of the RF port filter network. Greater isolation can be achieved by using higher order filter networks, as described in the Applications Information section. The ADL5350 is fabricated on a GaAs pHEMT, high performance IC process. The ADL5350 is available in a 2 mm × 3 mm, 8-lead LFCSP. It operates over a −40°C to +85°C temperature range. An evaluation board is also available. 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 ©2008 Analog Devices, Inc. All rights reserved. ADL5350 TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................7 Applications....................................................................................... 1 850 MHz Characteristics..............................................................7 Functional Block Diagram .............................................................. 1 1950 MHz Characteristics......................................................... 12 General Description ......................................................................... 1 Functional Description.................................................................. 17 Revision History ............................................................................... 2 Circuit Description .................................................................... 17 Specifications..................................................................................... 3 Implementation Procedure ....................................................... 17 850 MHz Receive Performance .................................................. 3 Applications Information .............................................................. 19 1950 MHz Receive Performance ................................................ 3 Low Frequency Applications .................................................... 19 Spur Tables......................................................................................... 4 High Frequency Applications ................................................... 19 850 MHz Spur Table..................................................................... 4 Evaluation Board ............................................................................ 21 1950 MHz Spur Table................................................................... 4 Outline Dimensions ....................................................................... 22 Absolute Maximum Ratings............................................................ 5 Ordering Guide .......................................................................... 22 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 REVISION HISTORY 2/08—Revision 0: Initial Version Rev. 0 | Page 2 of 24 ADL5350 SPECIFICATIONS 850 MHz RECEIVE PERFORMANCE VS = 3 V, TA = 25°C, LO power = 4 dBm, re: 50 Ω, unless otherwise noted. Table 1. Parameter RF Frequency Range LO Frequency Range IF Frequency Range Conversion Loss SSB Noise Figure Input Third-Order Intercept (IP3) Input 1dB Compression Point (P1dB) LO-to-IF Leakage LO-to-RF Leakage RF-to-IF Leakage IF/2 Spurious Supply Voltage Supply Current Min 750 500 30 2.7 Typ 850 780 70 6.7 6.4 25 19.8 29 13 19.5 −50 3 16.5 Max 975 945 250 3.5 Unit MHz MHz MHz dB dB dBm dBm dBc dBc dBc dBc V mA Conditions Low-side LO fRF = 850 MHz, fLO = 780 MHz, fIF = 70 MHz fRF = 850 MHz, fLO = 780 MHz, fIF = 70 MHz fRF1 = 849 MHz, fRF2 = 850 MHz, fLO = 780 MHz, fIF = 70 MHz; each RF tone 0 dBm fRF = 820 MHz, fLO = 750 MHz, fIF = 70 MHz LO power = 4 dBm, fLO = 780 MHz LO power = 4 dBm, fLO = 780 MHz RF power = 0 dBm, fRF = 850 MHz, fLO = 780 MHz RF power = 0 dBm, fRF = 850 MHz, fLO = 780 MHz LO power = 4 dBm 1950 MHz RECEIVE PERFORMANCE VS = 3 V, TA = 25°C, LO power = 6 dBm, re: 50 Ω, unless otherwise noted. Table 2. Parameter RF Frequency Range LO Frequency Range IF Frequency Range Conversion Loss SSB Noise Figure Input Third-Order Intercept (IP3) Input 1dB Compression Point (P1dB) LO-to-IF Leakage LO-to-RF Leakage RF-to-IF Leakage IF/2 Spurious Supply Voltage Supply Current Min 1800 1420 50 2.7 Typ 1950 1760 190 6.8 6.5 25 19 13.5 10.5 11.5 −54 3 19 Max 2050 2000 380 3.5 Unit MHz MHz MHz dB dB dBm dBm dBc dBc dBc dBc V mA Conditions Low-side LO fRF = 1950 MHz, fLO = 1760 MHz, fIF = 190 MHz fRF = 1950 MHz, fLO = 1760 MHz, fIF = 190 MHz fRF1 = 1949 MHz, fRF2 = 1951 MHz, fLO = 1760 MHz, fIF = 190 MHz; each RF tone 0 dBm fRF = 1950 MHz, fLO = 1760 MHz, fIF = 190 MHz LO power = 6 dBm, fLO = 1760 MHz LO power = 6 dBm, fLO = 1760 MHz RF power = 0 dBm, fRF = 1950 MHz, fLO = 1760 MHz RF power = 0 dBm, fRF = 1950 MHz, fLO = 1760 MHz LO power = 6 dBm Rev. 0 | Page 3 of 24 ADL5350 SPUR TABLES All spur tables are (N × fRF) − (M × fLO) mixer spurious products for 0 dBm input power, unless otherwise noted. N.M. indicates that a spur was not measured due to it being at a frequency >6 GHz. 850 MHz SPUR TABLE Table 3. N 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 –20.6 –5.6 –69.2 –66.0 –92.6 ≤–100 ≤–100 ≤–100 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. 2 –19.2 –23.6 –50.5 –71.8 –91.6 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N.M. N.M. N.M. N.M. N.M. N.M. 3 –15.3 –19.6 –59.8 –68.1 –96.1 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N.M. N.M. N.M. N.M. N.M. 4 –16.7 –31.9 –49.1 –70.2 –92.7 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N.M. N.M. N.M. N.M. 5 –38.4 –28.7 –57.5 –67.4 –98.7 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N.M. N.M. N.M. 6 –26.6 –46.1 –51.0 –66.9 –90.2 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N.M. N.M. 5 N.M. N.M. –74.6 –64.3 –76.5 –77.1 ≤–100 ≤–100 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. 6 N.M. N.M. N.M. –83.7 –80.0 –79.5 –93.4 ≤–100 ≤–100 N.M. N.M. N.M. N.M. N.M. N.M. N.M. 7 –22.1 –48.5 –77.7 –70.8 –91.7 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N.M. 8 N.M. –33.2 –65.8 –85.2 –88.8 –99.5 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. 9 N.M. N.M. –60.8 –87.3 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 10 N.M. N.M. N.M. –72.2 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 11 N.M. N.M. N.M. N.M. –91.7 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 12 N.M. N.M. N.M. N.M. –88.6 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 13 N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 14 N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 8 N.M. N.M. N.M. N.M. N.M. –95.2 ≤–100 –96.4 ≤–100 ≤–100 ≤–100 N.M. N.M. N.M. N.M. N.M. 9 N.M. N.M. N.M. N.M. N.M. N.M. –99.2 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N.M. N.M. N.M. 10 N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N.M. N.M. 11 N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N.M. 12 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N.M. 13 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. 14 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 15 N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 05615–068 M 0 ≤–100 –21.6 –50.0 –74.8 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. 1950 MHz SPUR TABLE N 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 ≤–100 –10.8 –48.2 –72.3 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. 1 –13.1 –7.0 –61.2 –71.4 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. 2 –32.8 –25.3 –41.2 –83.6 –91.4 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. 3 –22.4 –27.7 –44.6 –64.5 –84.2 –90.8 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. 4 N.M. –33.9 –47.0 –62.4 –78.3 –82.3 ≤–100 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. M 7 N.M. N.M. N.M. N.M. –92.0 –83.8 –94.5 –94.0 ≤–100 ≤–100 N.M. N.M. N.M. N.M. N.M. N.M. Rev. 0 | Page 4 of 24 15 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 05615–069 Table 4. ADL5350 ABSOLUTE MAXIMUM RATINGS Table 5. Parameter Supply Voltage, VS RF Input Level LO Input Level Internal Power Dissipation θJA Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Rating 4.0 V 23 dBm 20 dBm 324 mW 154.3°C/W 135°C −40°C to +85°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. ESD CAUTION Rev. 0 | Page 5 of 24 ADL5350 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS RF/IF 1 8 RF/IF GND2 2 ADL5350 LOIN 3 TOP VIEW (Not to Scale) NC 4 7 NC 6 VPOS NC = NO CONNECT 05615-002 5 GND1 Figure 2. Pin Configuration Table 6. Pin Function Descriptions Pin No. 1, 8 Mnemonic RF/IF 2, 5, Paddle 3 4, 7 6 GND2, GND1, GND LOIN NC VPOS Description RF and IF Input/Output Ports. These nodes are internally tied together. RF and IF port separation is achieved using external tuning networks. Device Common (DC Ground). LO Input. Needs to be ac-coupled. No Connect. Grounding NC pins is recommended. Positive Supply Voltage for the Drain of the LO Buffer. A series RF choke is needed on the supply line to provide proper ac loading of the LO buffer amplifier. Rev. 0 | Page 6 of 24 ADL5350 TYPICAL PERFORMANCE CHARACTERISTICS 850 MHz CHARACTERISTICS 23 19 22 18 21 17 20 16 15 14 13 19 18 17 16 12 15 11 14 10 –40 –20 0 20 40 60 80 TEMPERATURE (°C) 13 –40 –20 0 20 40 60 80 TEMPERATURE (°C) Figure 3. Supply Current vs. Temperature 05615-006 INPUT P1dB (dBm) 20 05615-003 SUPPLY CURRENT (mA) Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted. Figure 6. Input P1dB vs. Temperature 10 22 9 20 SUPPLY CURRENT (mA) CONVERSION LOSS (dB) 8 7 6 5 4 3 2 18 +25°C 16 14 –40°C +85°C 12 –20 0 20 40 60 80 TEMPERATURE (°C) 10 2.7 05615-004 0 –40 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.4 3.5 SUPPLY VOLTAGE (V) Figure 4. Conversion Loss vs. Temperature 05615-007 1 Figure 7. Supply Current vs. Supply Voltage 28 7.4 27 7.2 CONVERSION LOSS (dB) 26 24 23 22 21 7.0 +85°C 6.8 +25°C 6.6 –40°C 6.4 20 18 –40 –20 0 20 40 60 TEMPERATURE (°C) 80 6.0 2.7 2.8 2.9 3.0 3.1 3.2 3.3 SUPPLY VOLTAGE (V) Figure 5. Input IP3 (IIP3) vs. Temperature Figure 8. Conversion Loss vs. Supply Voltage Rev. 0 | Page 7 of 24 05615-008 6.2 19 05615-005 INPUT IP3 (dBm) 25 ADL5350 Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted. 28 22 27 20 SUPPLY CURRENT (mA) +85°C 25 +25°C 24 18 –40°C 16 14 +85°C +25°C 23 2.9 3.0 3.1 3.2 3.3 3.4 3.5 SUPPLY VOLTAGE (V) 10 750 775 800 825 850 Figure 9. Input IP3 vs. Supply Voltage 925 950 975 7.6 7.4 22 CONVERSION LOSS (dB) 7.2 21 INPUT P1dB (dBm) 900 Figure 12. Supply Current vs. RF Frequency 23 –40°C 20 +25°C 19 +85°C 18 17 +85°C 7.0 6.8 +25°C 6.6 –40°C 6.4 6.2 6.0 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 SUPPLY VOLTAGE (V) 5.8 750 05615-010 16 2.7 875 RF FREQUENCY (MHz) 05615-012 2.8 05615-009 22 2.7 12 800 850 900 950 RF FREQUENCY (MHz) Figure 10. Input P1dB vs. Supply Voltage 05615-013 INPUT IP3 (dBm) –40°C 26 Figure 13. Conversion Loss vs. RF Frequency 27.0 8.0 26.5 26.0 +85°C 25.5 INPUT IP3 (dBm) 7.0 6.5 6.0 –40°C +25°C 25.0 24.5 24.0 23.5 23.0 5.5 5.0 2.7 2.8 2.9 3.0 3.1 3.2 3.3 SUPPLY VOLTAGE (V) 3.4 3.5 22.0 750 775 800 825 850 875 900 925 RF FREQUENCY (MHz) Figure 14. Input IP3 vs. RF Frequency Figure 11. Noise Figure vs. Supply Voltage Rev. 0 | Page 8 of 24 950 975 05615-014 22.5 05615-011 NOISE FIGURE (dB) 7.5 ADL5350 Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted. 23 9 +85°C 8 22 +25°C –40°C 20 +25°C 19 +85°C 18 17 –40°C 5 4 3 2 1 775 800 825 850 875 900 925 950 975 RF FREQUENCY (MHz) 0 25 05615-015 16 750 6 75 100 125 150 175 200 225 250 225 250 IF FREQUENCY (MHz) Figure 15. Input P1dB vs. RF Frequency Figure 18. Conversion Loss vs. IF Frequency 8 28 7 27 INPUT IP3 (dBm) 6 NOISE FIGURE (dB) 50 05615-018 INPUT P1dB (dBm) CONVERSION LOSS (dB) 7 21 5 4 3 26 –40°C +25°C 25 +85°C 24 2 775 800 825 850 875 900 925 950 975 RF FREQUENCY (MHz) 22 25 05615-016 0 750 50 75 100 125 150 175 200 IF FREQUENCY (MHz) Figure 16. Noise Figure vs. RF Frequency 05615-019 23 1 Figure 19. Input IP3 vs. IF Frequency 22 23 +25°C 22 21 –40°C 14 12 +25°C 19 18 +85°C 17 10 8 25 –40°C 20 50 75 100 125 150 175 200 IF FREQUENCY (MHz) 225 250 Figure 17. Supply Current vs. IF Frequency 16 25 50 75 100 125 150 175 200 IF FREQUENCY (MHz) Figure 20. Input P1dB vs. IF Frequency Rev. 0 | Page 9 of 24 225 250 05615-020 +85°C 16 INPUT P1dB (dBm) 18 05615-017 SUPPLY CURRENT (mA) 20 ADL5350 Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted. 10 27 –40°C 9 25 +25°C +85°C 23 7 INPUT IP3 (dBm) NOISE FIGURE (dB) 8 6 5 4 3 21 19 17 2 100 150 200 250 300 13 –6 05615-021 0 50 350 IF FREQUENCY (MHz) –4 –2 0 2 4 6 8 10 12 8 10 12 LO LEVEL (dBm) Figure 21. Noise Figure vs. IF Frequency 05615-024 15 1 Figure 24. Input IP3 vs. LO Level 18 22 16 –40°C 21 20 12 INPUT P1dB (dBm) SUPPLY CURRENT (mA) 14 10 +85°C 8 –40°C 6 +25°C 19 18 +85°C 17 4 +25°C –4 –2 0 2 4 6 8 10 12 LO LEVEL (dBm) 15 –6 05615-022 0 –6 –4 –2 0 2 4 6 LO LEVEL (dBm) Figure 22. Supply Current vs. LO Level 05615-025 16 2 Figure 25. Input P1dB vs. LO Level 20 12 11 18 10 NOISE FIGURE (dB) 16 +25°C 14 12 10 6 –6 8 7 6 5 –4 –2 0 2 4 6 8 LO LEVEL (dBm) 10 12 Figure 23. Conversion Loss vs. LO Level 4 –2 0 2 4 6 LO LEVEL (dBm) Figure 26. Noise Figure vs. LO Level Rev. 0 | Page 10 of 24 8 10 05615-026 8 9 +85°C 05615-023 CONVERSION LOSS (dB) –40°C ADL5350 Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted. –13 0 –2 –14 RF LEAKAGE (dBc) IF FEEDTHROUGH (dBc) –4 –15 –16 –17 –18 –40°C +25°C –6 –8 –10 –12 –14 –19 –16 –20 825 850 875 900 925 950 975 RF FREQUENCY (MHz) Figure 27. IF Feedthrough vs. RF Frequency +25°C –25 +85°C –30 –35 –40°C 705 730 755 780 805 830 855 LO FREQUENCY (MHz) 880 905 05615-028 IF FEEDTHROUGH (dBc) –20 –45 680 680 730 780 830 880 LO FREQUENCY (MHz) Figure 29. RF Leakage vs. LO Frequency –15 –40 –20 630 Figure 28. IF Feedthrough vs. LO Frequency Rev. 0 | Page 11 of 24 930 05615-029 800 05615-027 –18 +85°C –21 750 775 ADL5350 1950 MHz CHARACTERISTICS 23 19 22 18 21 17 20 16 15 14 13 19 18 17 16 12 15 11 14 10 –40 –20 0 20 40 60 80 TEMPERATURE (°C) 13 –40 –20 0 Figure 30. Supply Current vs. Temperature 40 60 80 Figure 33. Input P1dB vs. Temperature 10 22 9 +25°C 20 SUPPLY CURRENT (mA) 8 CONVERSION LOSS (dB) 20 TEMPERATURE (°C) 05615-033 INPUT P1dB (dBm) 20 05615-030 SUPPLY CURRENT (mA) Supply voltage = 3 V, RF frequency = 1950 MHz, IF frequency = 190 MHz, RF level = −10 dBm, LO level = 6 dBm, TA = 25°C, unless otherwise noted. 7 6 5 4 3 2 18 +85°C –40°C 16 14 12 –20 0 20 40 60 80 TEMPERATURE (°C) 10 2.7 05615-031 0 –40 2.8 2.9 3.0 Figure 31. Conversion Loss vs. Temperature 3.2 3.3 3.4 3.5 3.4 3.5 Figure 34. Supply Current vs. Supply Voltage 7.4 28 27 7.2 CONVERSION LOSS (dB) 26 25 24 23 22 21 +85°C 7.0 +25°C 6.8 –40°C 6.6 6.4 20 6.2 18 –40 –20 0 20 40 TEMPERATURE (°C) 60 80 6.0 2.7 2.8 2.9 3.0 3.1 3.2 3.3 SUPPLY VOLTAGE (V) Figure 35. Conversion Loss vs. Supply Voltage Figure 32. Input IP3 vs. Temperature Rev. 0 | Page 12 of 24 05615-035 19 05615-032 INPUT IP3 (dBm) 3.1 SUPPLY VOLTAGE (V) 05615-034 1 ADL5350 Supply voltage = 3 V, RF frequency = 1950 MHz, IF frequency = 190 MHz, RF level = −10 dBm, LO level = 6 dBm, TA = 25°C, unless otherwise noted. 28 22 27 20 SUPPLY CURRENT (mA) +85°C 26 +25°C 25 –40°C 24 16 14 2.9 3.0 3.1 3.2 3.3 3.4 3.5 SUPPLY VOLTAGE (V) 10 1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050 05615-036 2.8 RF FREQUENCY (MHz) Figure 36. Input IP3 vs. Supply Voltage Figure 39. Supply Current vs. RF Frequency 20 7.6 7.4 +25°C 7.2 CONVERSION LOSS (dB) 19 INPUT P1dB (dBm) +85°C 12 23 22 2.7 –40°C 18 05615-039 INPUT IP3 (dBm) +25°C –40°C +85°C 18 17 +85°C 7.0 6.8 +25°C –40°C 6.6 6.4 6.2 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 SUPPLY VOLTAGE (V) 5.8 1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050 05615-037 16 2.7 RF FREQUENCY (MHz) Figure 37. Input P1dB vs. Supply Voltage 05615-040 6.0 Figure 40. Conversion Loss vs. RF Frequency 8.0 27.0 26.5 26.0 +85°C 25.5 INPUT IP3 (dBm) 7.0 6.5 6.0 25.0 +25°C 24.5 –40°C 24.0 23.5 23.0 5.5 2.8 2.9 3.0 3.1 3.2 3.3 SUPPLY VOLTAGE (V) 3.4 3.5 Figure 38. Noise Figure vs. Supply Voltage 22.0 1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050 RF FREQUENCY (MHz) Figure 41. Input IP3 vs. RF Frequency Rev. 0 | Page 13 of 24 05615-041 22.5 5.0 2.7 05615-038 NOISE FIGURE (dB) 7.5 ADL5350 Supply voltage = 3 V, RF frequency = 1950 MHz, IF frequency = 190 MHz, RF level = −10 dBm, LO level = 6 dBm, TA = 25°C, unless otherwise noted. 9 23 8 22 +85°C CONVERSION LOSS (dB) 7 20 –40°C +25°C 19 18 +85°C 6 +25°C –40°C 5 4 3 2 17 1 RF FREQUENCY (MHz) 0 50 05615-042 16 1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050 75 100 125 150 175 200 225 250 275 300 325 350 375 IF FREQUENCY (MHz) 05615-045 INPUT P1dB (dBm) 21 Figure 45. Conversion Loss vs. IF Frequency Figure 42. Input P1dB vs. RF Frequency 28 10 9 27 +85°C 7 INPUT IP3 (dBm) NOISE FIGURE (dB) 8 6 5 4 26 +25°C 25 24 –40°C 3 23 RF FREQUENCY (MHz) 22 50 05615-043 1 1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050 75 100 125 150 175 200 225 250 275 300 325 350 375 IF FREQUENCY (MHz) 05615-046 2 Figure 46. Input IP3 vs. IF Frequency Figure 43. Noise Figure vs. RF Frequency 23 22 +25°C 22 21 –40°C 16 14 20 –40°C 19 12 18 10 17 +85°C 8 50 75 100 125 150 175 200 225 250 275 300 325 350 375 IF FREQUENCY (MHz) 16 50 75 100 125 150 175 200 225 250 275 300 325 350 375 IF FREQUENCY (MHz) Figure 47. Input P1dB vs. IF Frequency Figure 44. Supply Current vs. IF Frequency Rev. 0 | Page 14 of 24 +25°C 05615-047 +85°C INPUT P1dB (dBm) 18 05615-044 SUPPLY CURRENT (mA) 20 ADL5350 Supply voltage = 3 V, RF frequency = 1950 MHz, IF frequency = 190 MHz, RF level = −10 dBm, LO level = 6 dBm, TA = 25°C, unless otherwise noted. 12 27 +85°C 23 8 INPUT IP3 (dBm) 6 4 –40°C 21 19 17 2 100 150 200 250 300 13 –6 05615-048 0 50 350 IF FREQUENCY (MHz) –4 –2 4 6 8 10 12 8 10 12 Figure 51. Input IP3 vs. LO Level 22 25 24 20 +25°C –40°C 23 18 22 16 +85°C 14 INPUT P1dB (dBm) –40°C 12 10 8 6 21 20 +25°C 19 18 17 16 +85°C 15 4 14 2 13 –4 –2 0 2 4 6 8 10 12 LO LEVEL (dBm) 12 –6 05615-049 0 –6 –4 –2 0 2 4 6 LO LEVEL (dBm) Figure 49. Supply Current vs. LO Level 05615-052 SUPPLY CURRENT (mA) 2 LO LEVEL (dBm) Figure 48. Noise Figure vs. IF Frequency Figure 52. Input P1dB vs. LO Level 20 12 –40°C 11 18 +25°C 10 NOISE FIGURE (dB) 16 +85°C 14 12 10 8 6 –6 9 8 7 6 5 –4 –2 0 2 4 6 8 LO LEVEL (dBm) 10 12 05615-050 CONVERSION LOSS (dB) 0 05615-051 15 Figure 50. Conversion Loss vs. LO Level 4 –2 0 2 4 6 LO LEVEL (dBm) Figure 53. Noise Figure vs. LO Level Rev. 0 | Page 15 of 24 8 10 05615-053 NOISE FIGURE (dB) +25°C 25 10 ADL5350 0 –9 –2 –10 –4 –40°C –12 –13 +85°C –8 –10 +25°C –14 –12 –15 1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050 –14 1560 RF FREQUENCY (MHz) Figure 54. IF Feedthrough vs. RF Frequency –9 –10 –11 –12 –13 –14 –40°C –15 –16 +85°C +25°C –18 1610 1635 1660 1685 1710 1735 1760 1785 1810 1835 1860 LO FREQUENCY (MHz) 05615-055 –17 1610 1660 1710 1760 1810 1860 LO FREQUENCY (MHz) Figure 56. RF Leakage vs. LO Frequency –8 IF FEEDTHROUGH (dBc) –6 Figure 55. IF Feedthrough vs. LO Frequency Rev. 0 | Page 16 of 24 1910 1960 05615-056 –11 RF LEAKAGE (dBc) –8 05615-054 IF FEEDTHROUGH (dBc) Supply voltage = 3 V, RF frequency = 1950 MHz, IF frequency = 190 MHz, RF level = −10 dBm, LO level = 6 dBm, TA = 25°C, unless otherwise noted. ADL5350 FUNCTIONAL DESCRIPTION CIRCUIT DESCRIPTION IMPLEMENTATION PROCEDURE The ADL5350 is a GaAs pHEMT, single-ended, passive mixer with an integrated LO buffer amplifier. The device relies on the varying drain to source channel conductance of a FET junction to modulate an RF signal. A simplified schematic is shown in Figure 57. The ADL5350 is a simple single-ended mixer that relies on off-chip circuitry to achieve effective RF dynamic performance. The following steps should be followed to achieve optimum performance (see Figure 58 for component designations): VS RF INPUT OR OUTPUT VS IF L2 VPOS C2 L4 RF IF LOIN IF OUTPUT OR INPUT 8 7 6 5 RF/IF NC VPOS GND1 RF/IF 1 GND2 2 ADL5350 GND2 LOIN 3 RF Figure 57. Simplified Schematic L1 NC 4 L3 C1 C3 The LO signal is applied to the gate contact of a FET-based buffer amplifier. The buffer amplifier provides sufficient gain of the LO signal to drive the resistive switch. Additionally, feedback circuitry provides the necessary bias to the FET buffer amplifier and RF/IF ports to achieve optimum modulation efficiency for common cellular frequencies. LO 05615-058 GND1 05615-057 LO INPUT C4 C6 Figure 58. Reference Schematic 1. Table 7 shows the recommended LO bias inductor values for a variety of LO frequencies. To ensure efficient commutation of the mixer, the bias inductor needs to be properly set. For other frequencies within the range shown, the values can be interpolated. For frequencies outside this range, see the Applications Information section. The mixing of RF and LO signals is achieved by switching the channel conductance from the RF/IF port to ground at the rate of the LO. The RF signal is passed through an external band-pass network to help reject image bands and reduce the broadband noise presented to the mixer. The bandlimited RF signal is presented to the time-varying load of the RF/IF port, which causes the envelope of the RF signal to be amplitude modulated at the rate of the LO. A filter network applied to the IF port is necessary to reject the RF signal and pass the wanted mixing product. In a downconversion application, the IF filter network is designed to pass the difference frequency and present an open circuit to the incident RF frequency. Similarly, for an upconversion application, the filter is designed to pass the sum frequency and reject the incident RF. As a result, the frequency response of the mixer is determined by the response characteristics of the external RF/IF filter networks. Table 7. Recommended LO Bias Inductor Desired LO Frequency (MHz) 380 750 1000 1750 2000 1 Rev. 0 | Page 17 of 24 Recommended LO Bias Inductor, L41 (nH) 68 24 18 3.8 2.1 The bias inductor should have a self-resonant frequency greater than the intended frequency of operation. ADL5350 2. Tune the LO port input network for optimum return loss. Typically, a band-pass network is used to pass the LO signal to the LOIN pin. It is recommended to block high frequency harmonics of the LO from the mixer core. LO harmonics cause higher RF frequency images to be downconverted to the desired IF frequency and result in sensitivity degradation. If the intended LO source has poor harmonic distortion and spectral purity, it may be necessary to employ a higher order band-pass filter network. Figure 58 illustrates a simple LC bandpass filter used to pass the fundamental frequency of the LO source. Capacitor C3 is a simple dc block, while the Series Inductor L3, along with the gate-to-source capacitance of the buffer amplifier, form a low-pass network. The native gate input of the LO buffer (FET) alone presents a rather high input impedance. The gate bias is generated internally using feedback that can result in a positive return loss at the intended LO frequency. If a better than −10 dB return loss is desired, it may be necessary to add a shunt resistor to ground before the coupling capacitor (C3) to present a lower loading impedance to the LO source. In doing so, a slightly greater LO drive level may be required. 3. Design the RF and IF filter networks. Figure 58 depicts simple LC tank filter networks for the IF and RF port interfaces. The RF port LC network is designed to pass the RF input signal. The series LC tank has a resonant frequency at 1/(2π√LC). At resonance, the series reactances are canceled, which presents a series short to the RF signal. A parallel LC tank is used on the IF port to reject the RF and LO signals. At resonance, the parallel LC tank presents an open circuit. It is necessary to account for the board parasitics, finite Q, and self-resonant frequencies of the LC components when designing the RF, IF, and LO filter networks. Table 8 provides suggested values for initial prototyping. Table 8. Suggested RF, IF, and LO Filter Networks for Low-Side LO Injection RF Frequency (MHz) 450 850 1950 2400 1 L1 (nH) 1 8.3 6.8 1.7 0.67 C1 (pF) 10 4.7 1.5 1 L2 (nH) 10 4.7 1.7 1.5 C2 (pF) 10 5.6 1.2 0.7 L3 (nH) 10 8.2 3.5 3.0 C3 (pF) 100 100 100 100 The inductor should have a self-resonant frequency greater than the intended frequency of operation. L1 should be a high Q inductor for optimum NF performance. Rev. 0 | Page 18 of 24 ADL5350 APPLICATIONS INFORMATION LOW FREQUENCY APPLICATIONS HIGH FREQUENCY APPLICATIONS The ADL5350 can be used in low frequency applications. The circuit in Figure 59 is designed for an RF of 136 MHz to 176 MHz and an IF of 45 MHz using a high-side LO. The series and parallel resonant circuits are tuned for 154 MHz, which is the geometric mean of the desired RF frequencies. The performance of this circuit is depicted in Figure 60. The ADL5350 can be used at extended frequencies with some careful attention to board and component parasitics. Figure 61 is an example of a 2560 MHz to 2660 MHz downconversion using a low-side LO. The performance of this circuit is depicted in Figure 62. Note that the inductor and capacitor values are very small, especially for the RF and IF ports. Above 2.5 GHz, it is necessary to consider alternate solutions to avoid unreasonably small inductor and capacitor values. 3V 4.7µF 3V 100nF 8 7 6 5 RF/IF NC VPOS GND1 LOIN 3 ALL INDUCTORS ARE 0302CS SERIES FROM COILCRAFT NC 4 1nF 8 7 6 5 RF/IF NC VPOS GND1 RF/IF 1 GND2 2 0.67nH RF 05615-061 LO NC 4 3.0nH 100pF LO 12 Figure 61. 2560 MHz to 2660 MHz RF Downconversion Schematic IIP3 10 8 25 6 LOSS 20 4 IP1dB 15 10 136 146 156 166 0 176 RF FREQUENCY (MHz) 13 IIP3 25 05615-065 2 14 30 IP1dB, IIP3 (dBm) 30 35 CONVERSION LOSS (dB) 35 IP1dB, IIP3 (dBm) LOIN 3 1pF Figure 59. 136 MHz to 176 MHz RF Downconversion Schematic 40 2.1nH ADL5350 36nH 27pF 0.7pF 12 20 15 10 10 9 LOSS 5 8 0 2560 Figure 60. Measured Performance for Circuit in Figure 59 Using High-Side LO Injection and 45 MHz IF 11 IP1dB CONVERSION LOSS (dB) GND2 2 1nF 1.5nH ADL5350 RF/IF 1 100pF IF 100nH 27pF 2580 2600 2620 2640 7 2660 RF FREQUENCY (MHz) 05615-066 ALL INDUCTORS ARE 0603CS SERIES FROM COILCRAFT + 36nH RF 4.7µF 10nF 05615-062 IF Figure 62. Measured Performance for Circuit in Figure 61 Using Low-Side LO Injection and 374 MHz IF The typical networks used for cellular applications below 2.6 GHz use band-select and band-reject networks on the RF and IF ports. At higher RF frequencies, these networks are not easily realized by using lumped element components. As a result, it is necessary to consider alternate filter network topologies to allow more reasonable values for inductors and capacitors. Rev. 0 | Page 19 of 24 ADL5350 Classic audio crossover filter design techniques can be applied to help derive component values. However, some caution must be applied when selecting component values. At high RF frequencies, the board parasitics can significantly influence the final optimum inductor and capacitor component selections. Some empirical testing may be necessary to optimize the RF and IF port filter networks. The performance of the circuit depicted in Figure 63 is provided in Figure 64. 30 3V + L2 1.5nH 3.8nH 8 7 6 5 RF/IF NC VPOS GND1 RF/IF 1 GND2 2 ADL5350 LOIN 3 RF NC 4 12 20 10 IP1dB 15 8 LOSS 10 6 5 4 2.2nH C1 1.2pF 100pF LO 0 3300 05615-064 L1 3.5nH IIP3 25 100pF 3400 3500 3600 3700 2 3800 RF FREQUENCY (MHz) Figure 64. Measured Performance for Circuit in Figure 63 Using Low-Side LO Injection and 800 MHz IF Figure 63. 3.3 GHz to 3.8 GHz RF Downconversion Schematic When designing the RF port and IF port networks, it is important to remember that the networks share a common node (the RF/IF pins). In addition, the opposing network presents some loading impedance to the target network being designed. Rev. 0 | Page 20 of 24 05615-067 CAC 100pF C2 1.8pF IP1dB, IIP3 (dBm) IF ALL INDUCTORS ARE 0302CS SERIES FROM COILCRAFT 14 4.7µF CONVERSION LOSS (dB) Figure 63 depicts a crossover filter network approach to provide isolation between the RF and IF ports for a downconverting application. The crossover network essentially provides a highpass filter to allow the RF signal to pass to the RF/IF node (Pin 1 and Pin 8), while presenting a low-pass filter (which is actually a band-pass filter when considering the dc blocking capacitor, CAC). This allows the difference component (fRF − fLO) to be passed to the desired IF load. ADL5350 EVALUATION BOARD An evaluation board is available for the ADL5350. The evaluation board has two halves: a low band board designated as Board A and a high band board designated as Board B. The schematic for the evaluation board is shown in Figure 65. VPOS-A VPOS-B IF-A IF-B C4-A C6-A L2-A + C5-B + C5-A C2-A L2-B L4-A C4-B C6-B C2-B L4-B 8 7 6 5 8 7 6 5 RF/IF NC VPOS GND1 RF/IF NC VPOS GND1 U1-A U1-B RF/IF 1 GND2 2 RF-A ADL5350 LOIN 3 NC 4 GND2 2 RF-B L3-A L1-A C1-A RF/IF 1 NC 4 L3-B L1-B C1-B C3-A LO-A LOIN 3 C3-B LO-B 05615-059 ADL5350 Figure 65. Evaluation Board Table 9. Evaluation Board Configuration Options Component C4-A, C4-B, C5-A, C5-B L1-A, L1-B, C1-A, C1-B Function Supply Decoupling. C4-A and C4-B provide local bypassing of the supply. C5-A and C5-B are used to filter the ripple of a noisy supply line. These are not always necessary. RF Input Network. Designed to provide series resonance at the intended RF frequency. L2-A, L2-B, C2-A, C2-B, C6-A, C6-B IF Output Network. Designed to provide parallel resonance at the geometric mean of the RF and LO frequencies. L3-A, L3-B, C3-A, C3-B LO Input Network. Designed to block dc and optimize LO voltage swing at LOIN. L4-A, L4-B LO Buffer Amplifier Choke. Provides bias and ac loading impedance to LO buffer amplifier. Rev. 0 | Page 21 of 24 Default Conditions C4-A = C4-B = 100 pF, C5-A = C5-B = 4.7 μF L1-A = 6.8 nH (0603CS from Coilcraft), L1-B = 1.7 nH (0302CS from Coilcraft), C1-A = 4.7 pF, C1-B = 1.5 pF L2-A = 4.7 nH (0603CS from Coilcraft), L2-B = 1.7 nH (0302CS from Coilcraft), C2-A = 5.6 pF, C2-B = 1.2 pF, C6-A = C6-B = 1 nF L3-A = 8.2 nH (0603CS from Coilcraft), L3-B = 3.5 nH (0302CS from Coilcraft), C3-A = C3-B = 100 pF L4-A = 24 nH (0603CS from Coilcraft), L4-B = 3.8 nH (0302CS from Coilcraft) ADL5350 OUTLINE DIMENSIONS 1.89 1.74 1.59 3.25 3.00 2.75 1.95 1.75 1.55 TOP VIEW 12° MAX 5 BOTTOM VIEW * 8 EXPOSED PAD 4 2.95 2.75 2.55 PIN 1 INDICATOR 1.00 0.85 0.80 0.60 0.45 0.30 2.25 2.00 1.75 0.55 0.40 0.30 0.15 0.10 0.05 1 0.50 BSC 0.25 0.20 0.15 0.80 MAX 0.65 TYP 0.05 MAX 0.02 NOM SEATING PLANE 0.30 0.23 0.18 0.20 REF Figure 66. 8-Lead Lead Frame Chip Scale Package [LFCSP_VD] 2 mm × 3 mm Body, Very Thin, Dual Lead (CP-8-1) Dimensions shown in millimeters ORDERING GUIDE Model ADL5350ACPZ-R7 1 ADL5350ACPZ-WP1 ADL5350-EVALZ1 1 Temperature Range −40°C to +85°C −40°C to +85°C Package Description 8-Lead Lead Frame Chip Scale Package [LFCSP_VD] 8-Lead Lead Frame Chip Scale Package [LFCSP_VD] Evaluation Board Z = RoHS Compliant Part. Rev. 0 | Page 22 of 24 Package Option CP-8-1 CP-8-1 Branding 08 08 Ordering Quantity 3000, Reel 50, Waffle Pack ADL5350 NOTES Rev. 0 | Page 23 of 24 ADL5350 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05615-0-2/08(0) Rev. 0 | Page 24 of 24