19-4582; Rev 0; 4/09 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer 7.4dB Typical Conversion Loss 7.8dB Typical Noise Figure +24dBm Typical Input 1dB Compression Point +35dBm Typical Input IP3 88dBc Typical 2RF-LO Rejection at PRF = -14dBm Integrated LO Buffer Integrated RF and LO Baluns for Single-Ended Inputs Low LO Drive (0dBm Nominal) External Current-Setting Resistor Provides Option for Operating Device in Reduced-Power/ Reduced-Performance Mode Ordering Information TEMP RANGE PIN-PACKAGE MAX2051ETP+ PART -40C to +85C 20 Thin QFN-EP* MAX2051ETP+T -40C to +85C 20 Thin QFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. T = Tape and reel. Pin Configuration/ Functional Block Diagram Microwave and Fixed Broadband Wireless Access Microwave Links TOP VIEW Military Systems + Predistortion Receivers Private Mobile Radios Integrated Digital Enhanced Network (iDEN(R)) Base Stations WiMAXTM Base Stations and Customer Premise Equipment Wireless Local Loop 20 19 IF+ Cable Modem Termination Systems DOCSIS 3.0 and Euro DOCSIS Compatible IF- Video-on-Demand and DOCSIS-Compatible Edge QAM Modulation 50MHz to 1000MHz IF Frequency Range GND Applications 1200MHz to 2250MHz LO Frequency Range GND In addition to offering excellent linearity and noise performance, the MAX2051 also yields a high level of component integration. The device integrates baluns in the RF and LO ports, which allow for a single-ended RF input and a single-ended LO input. The MAX2051 requires a typical LO drive of 0dBm and a supply current guaranteed to below 130mA. The MAX2051 is available in a compact 5mm x 5mm, 20-pin thin QFN package with an exposed pad. Electrical performance is guaranteed over the extended temperature range, from TC = -40C to +85C. 850MHz to 1550MHz RF Frequency Range GND The MAX2051 high-linearity, up/downconversion mixer provides +35dBm input IP3, 7.8dB noise figure (NF), and 7.4dB conversion loss for 850MHz to 1550MHz wireless infrastructure and multicarrier cable head-end downstream video, video-on-demand (VOD), and cable modem termination systems (CMTS) applications. The MAX2051 also provides excellent suppression of spurious intermodulation products (> 77dBc at an RF level of -14dBm), making it an ideal downconverter for DOCSIS(R) 3.0 and Euro DOCSIS cable head-end systems. With an LO circuit tuned to support frequencies ranging from 1200MHz to 2250MHz, the MAX2051 is ideal for highside LO injection applications over an IF frequency range of 50MHz to 1000MHz. Features 18 17 16 EP* VCC RF 1 15 GND 2 14 GND GND 3 13 GND GND 4 12 LO GND 5 11 GND 8 9 10 VCC GND GND 7 LOBIAS DOCSIS and CableLabs are registered trademarks of Cable Television Laboratories, Inc. (CableLabs(R)). iDEN is a registered trademark of Motorola, Inc. WiMAX is a trademark of WiMAX Forum. 6 VCC MAX2051 TQFN *EXPOSED PAD. CONNECT EP TO GND. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 MAX2051 General Description MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +5.5V RF, LO to GND.........................................................-0.3V to 0.3V IF+, IF-, LOBIAS to GND ............................-0.3V to (VCC + 0.3V) RF, LO Input Power ........................................................+20dBm RF, LO Current (RF and LO is DC shorted to GND through balun).................................................................50mA Continuous Power Dissipation (Note 1) ........................2100mW JA (Notes 2, 3)..............................................................+33C/W JC (Note 3)........................................................................8C/W Operating Case Temperature Range (Note 4) ...................................................TC = -40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Note 1: Based on junction temperature TJ = TC + (JC x VCC x ICC). This formula can be used when the temperature of the exposed pad is known while the device is soldered down to a PCB. See the Applications Information section for details. The junction temperature must not exceed +150C. Note 2: Junction temperature TJ = TA + (JA x VCC x ICC). This formula can be used when the ambient temperature of the PCB is known. The junction temperature must not exceed +150C. Note 3: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. Note 4: TC is the temperature on the exposed pad of the package. TA is the ambient temperature of the device and PCB. Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (Typical Application Circuit, VCC = +4.75V to +5.25V, no input AC signals. TC = -40C to +85C, unless otherwise noted. Typical values are at VCC = +5.0V, TC = +25C, unless otherwise noted.) PARAMETER SYMBOL Supply Voltage VCC Supply Current ICC CONDITIONS MIN 4.75 Total supply current TYP MAX UNITS 5 5.25 V 105 130 mA TYP MAX UNITS RECOMMENDED AC OPERATING CONDITIONS PARAMETER SYMBOL CONDITIONS MIN RF Frequency fRF (Notes 5, 6) 850 1550 MHz LO Frequency fLO (Note 5) 1200 2250 MHz IF Frequency fIF Meeting RF and LO frequency ranges; IF matching components affect the IF frequency range (Note 5) 50 1000 MHz -3 +9 dBm LO Drive Level 2 PLO _______________________________________________________________________________________ SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer (Typical Application Circuit, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50 sources, PLO = -3dBm to +3dBm, PRF = 0dBm, fRF = 1000MHz to 1250MHz, fLO = 1200MHz to 2250MHz, fIF = 50MHz to 1000MHz, fRF < fLO, TC = -40C to +85C. Typical values are at VCC = +5.0V, PRF = 0dBm, PLO = 0dBm, fRF =1200MHz, fLO = 1700MHz, fIF = 500MHz, TC = +25C, unless otherwise noted.) (Note 7) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 9 dB Conversion Power Loss LC fRF = 1200MHz, fLO = 1700MHz, fIF = 500MHz, TC = +25C (Notes 8, 9) 7.4 Conversion Power Loss Temperature Coefficient TCL TC = -40C to +85C 0.01 dB/C Conversion Power Loss Variation vs. Frequency LC fLO = 1200MHz to 2250MHz 0.5 dB Noise Figure NFSSB Input 1dB Compression Point IP1dB Third-Order Input Intercept Point IIP3 Single sideband dBm 33 35 dBm PRF = -14dBm 73 88 PRF = -10dBm 69 84 PRF = 0dBm 59 74 PRF = -14dBm 74 78 PRF = -10dBm 70 74 PRF = 0dBm 60 64 PRF = -14dBm 68 79 PRF = -10dBm 64 75 PRF = 0dBm 54 65 PRF = -14dBm 71.5 77.4 PRF = -10dBm 67.5 73.4 PRF = 0dBm 57.5 63.4 2x1 dBc Single tone, fRF =1200MHz, fIF = 857.5MHz to 1000MHz, fLO = 2057.5MHz to 2200MHz, PLO = +3dBm, resultant fSPUR = 342.5MHz to 200MHz (Notes 8, 9, 10) Single tone, fRF =1200MHz, fIF = 97.5MHz to 430MHz, fLO = 1297.5MHz to 1630MHz, PLO = +3dBm, resultant fSPUR = 195MHz to 860MHz (Notes 8, 9, 10) 2LO-2RF Spurious Rejection dB 24 VCC = +5.0V, fRF1 = 1200MHz, fRF2 = 1201MHz, PRF = 0dBm tone, fLO = 1562MHz, PLO = 0dBm, TC = +25C, fIF = 362MHz (Notes 8, 9) Single tone, fRF =1200MHz, fIF = 192.5MHz to 857.5MHz, fLO = 1392.5MHz to 2057.5MHz, PLO = +3dBm, resultant fSPUR = 1007.5MHz to 342.5MHz (Notes 8, 9, 10) 2RF-LO Spurious Rejection 7.8 dBc 2x2 Single tone, fRF =1200MHz, fIF = 430MHz to 525MHz, fLO = 1630MHz to 1725MHz, PLO = +3dBm, resultant fSPUR = 860MHz to 1050MHz (Notes 8, 9, 10) _______________________________________________________________________________________ 3 MAX2051 AC ELECTRICAL CHARACTERISTICS (DOWNCONVERTER OPERATION) MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer AC ELECTRICAL CHARACTERISTICS (DOWNCONVERTER OPERATION) (continued) (Typical Application Circuit, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50 sources, PLO = -3dBm to +3dBm, PRF = 0dBm, fRF = 1000MHz to 1250MHz, fLO = 1200MHz to 2250MHz, fIF = 50MHz to 1000MHz, fRF < fLO, TC = -40C to +85C. Typical values are at VCC = +5.0V, PRF = 0dBm, PLO = 0dBm, fRF =1200MHz, fLO = 1700MHz, fIF = 500MHz, TC = +25C, unless otherwise noted.) (Note 7) PARAMETER 3LO-3RF Spurious Rejection SYMBOL 3x3 LO Leakage at RF Port CONDITIONS Single tone, fRF = 1200MHz, 50MHz < fIF < 1000MHz, 1250MHz < fLO < 2200MHz (Notes 8, 9) MIN TYP PRF = -14dBm 87.5 101 PRF = -10dBm 79.5 93 PRF = 0dBm 59.5 PLO = +3dBm (Notes 6, 8) LO Leakage at IF Port PLO = +3dBm (Notes 8, 9) RF-to-IF Isolation fRF = 1200MHz, PLO = +3dBm (Notes 8, 9) RF Input Impedance LO Input Impedance IF Output Impedance IF Output Return Loss 4 ZIF 73 -33.5 -27.5 dBm -26.3 -22.9 dBm dB 12 dB 50 RF and IF terminated with a matched impedance (Note 11) 11 dB Nominal differential impedance at the IC's IF outputs 50 RF terminated into 50, LO driven by 50 source, IF transformed to 50 single-ended using external components shown in the Typical Application Circuit 15 dB ZLO LO Input Return Loss dBc 50 LO on and IF terminated with a matched impedance RF Input Return Loss UNITS 51 ZRF 24 MAX _______________________________________________________________________________________ SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer (Typical Application Circuit, RF and LO ports are driven from 50 sources, fRF < fLO. Typical values are at VCC = +5.0V, PIF = 0dBm, PLO = 0dBm, fRF = 1250MHz, fLO = 1600MHz, fIF = 350MHz, TC = +25C, unless otherwise noted.) (Note 7) PARAMETER SYMBOL Conversion Power Loss LC Third-Order Input Intercept Point IIP3 CONDITIONS MIN TYP MAX UNITS 7.5 dB 33.4 dBm LO-2IF Spurious Rejection 61 dBc LO+2IF Spurious Rejection 63.3 dBc LO-3IF Spurious Rejection 78 dBc LO+3IF Spurious Rejection 79 dBc LO Leakage at RF Port fIF1 = 350MHz, fIF2 = 351MHz, PIF = 0dBm/tone -35.7 dBm IF Leakage at RF Port -52 dBm RF Return Loss 12.3 dB 18 dB IF Input Return Loss PLO = +3dBm fLO = 1200MHz Operation outside this range is possible, but with degraded performance of some parameters. See the Typical Operating Characteristics section. Note 6: Not production tested. Note 7: All values reflect losses of external components, including a 0.6dB loss at fIF = 350MHz and a 0.8dB loss at fIF = 1000MHz due to the 1:1 transformer. Output measurements were taken at IF outputs of the Typical Application Circuit. Note 8: Guaranteed by design and characterization. Note 9: 100% production tested for functionality. Note 10: Additional improvements (of up to 4dB to 6dB) in spurious responses can be made by increasing the LO drive to +6dBm. Note 11: The LO return loss can be improved by tuning C9 to offset any parasitics within the specific application circuit. Typical range of C9 is 10pF to 50pF. Note 5: _______________________________________________________________________________________ 5 MAX2051 AC ELECTRICAL CHARACTERISTICS (UPCONVERTER OPERATION) Typical Operating Characteristics (Typical Application Circuit, Downconversion mode, VCC = +5.0V, PLO = 0dBm, PRF = 0dBm, fRF = 1200MHz, LO is high-side injected, TC = +25C, unless otherwise noted.) CONVERSION LOSS vs. IF FREQUENCY (DOWNCONVERSION MODE) 8 7 TC = -40C 8 7 PLO = -3dBm, 0dBm, +3dBm 240 430 620 810 MAX2051 toc03 VCC = 4.75V, 5.0V, 5.25V 240 430 620 810 1000 50 240 430 620 810 IF FREQUENCY (MHz) IF FREQUENCY (MHz) IF FREQUENCY (MHz) IIP3 vs. IF FREQUENCY (DOWNCONVERSION MODE) IIP3 vs. IF FREQUENCY (DOWNCONVERSION MODE) IIP3 vs. IF FREQUENCY (DOWNCONVERSION MODE) 37 MAX2051 toc04 37 PRF = 0dBm/TONE 36 TC = +25C, +85C PRF = 0dBm/TONE 36 35 37 33 32 TC = -40C 31 30 240 430 620 810 34 PLO = -3dBm, 0dBm, +3dBm 33 34 VCC = 5.0V 33 32 32 31 31 VCC = 4.75V 30 30 1000 PRF = 0dBm/TONE 35 IIP3 (dBm) IIP3 (dBm) 34 VCC = 5.25V 1000 36 35 50 7 5 50 1000 MAX2051 toc05 50 8 6 5 5 50 240 430 620 810 50 1000 240 430 620 810 1000 IF FREQUENCY (MHz) IF FREQUENCY (MHz) IF FREQUENCY (MHz) 2RF-LO RESPONSE vs. IF FREQUENCY (DOWNCONVERSION MODE) 2RF-LO RESPONSE vs. IF FREQUENCY (DOWNCONVERSION MODE) 2RF-LO RESPONSE vs. IF FREQUENCY (DOWNCONVERSION MODE) TC = -40C 70 TC = +25C TC = +85C 50 PRF = 0dBm PLO = +3dBm 2RF-LO RESPONSE (dBc) 80 60 90 PLO = 0dBm 80 70 PLO = -3dBm 60 240 430 620 IF FREQUENCY (MHz) 810 1000 PRF = 0dBm 80 70 VCC = 4.75V, 5.0V, 5.25V 60 50 50 50 90 2RF-LO RESPONSE (dBc) PRF = 0dBm MAX2051 toc07 90 MAX2051 toc08 IIP3 (dBm) 9 6 6 6 MAX2051 toc02 9 MAX2051 toc06 TC = +25C 10 CONVERSION LOSS (dB) TC = +85C CONVERSION LOSS (dB) 9 CONVERSION LOSS (dB) 10 MAX2051 toc01 10 CONVERSION LOSS vs. IF FREQUENCY (DOWNCONVERSION MODE) MAX2051 toc09 CONVERSION LOSS vs. IF FREQUENCY (DOWNCONVERSION MODE) 2RF-LO RESPONSE (dBc) MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer 50 240 430 620 IF FREQUENCY (MHz) 810 1000 50 240 430 620 IF FREQUENCY (MHz) _______________________________________________________________________________________ 810 1000 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer TC = -40C, +25C, +85C 65 55 75 PLO = +3dBm 65 55 PLO = -3dBm 45 240 430 620 55 240 430 620 810 1000 50 240 430 620 810 1000 IF FREQUENCY (MHz) IF FREQUENCY (MHz) 3LO-3RF RESPONSE vs. IF FREQUENCY (DOWNCONVERSION MODE) 3LO-3RF RESPONSE vs. IF FREQUENCY (DOWNCONVERSION MODE) 3LO-3RF RESPONSE vs. IF FREQUENCY (DOWNCONVERSION MODE) TC = -40C, +25C, +85C 55 45 85 MAX2051 toc14 PRF = 0dBm 3LO-3RF RESPONSE (dBc) 3LO-3RF RESPONSE (dBc) 75 65 85 MAX2051 toc13 PRF = 0dBm 75 65 PLO = -3dBm, 0dBm, +3dBm 55 45 50 240 430 620 810 1000 MAX2051 toc12 VCC = 4.75V, 5.0V, 5.25V 65 45 50 1000 75 IF FREQUENCY (MHz) 85 PRF = 0dBm 75 65 VCC = 4.75V, 5.0V, 5.25V 55 45 50 240 430 620 810 1000 50 240 430 620 810 1000 IF FREQUENCY (MHz) IF FREQUENCY (MHz) IF FREQUENCY (MHz) LO LEAKAGE AT IF PORT vs. LO FREQUENCY (DOWNCONVERSION MODE) LO LEAKAGE AT IF PORT vs. LO FREQUENCY (DOWNCONVERSION MODE) LO LEAKAGE AT IF PORT vs. LO FREQUENCY (DOWNCONVERSION MODE) -30 -40 -50 1250 1440 1630 1820 LO FREQUENCY (MHz) 2010 2200 -20 -30 -40 -50 1250 1440 1630 1820 LO FREQUENCY (MHz) 2010 2200 MAX2051 toc18 PLO = -3dBm, 0dBm, +3dBm -10 LO LEAKAGE AT IF PORT (dBm) TC = -40C, +25C, +85C -10 LO LEAKAGE AT IF PORT (dBm) -20 MAX2051 toc16 -10 MAX2051 toc17 3LO-3RF RESPONSE (dBc) 810 PRF = 0dBm PLO = 0dBm 45 50 LO LEAKAGE AT IF PORT (dBm) 85 2LO-2RF RESPONSE (dBc) 75 PRF = 0dBm 2LO-2RF RESPONSE vs. IF FREQUENCY (DOWNCONVERSION MODE) MAX2051 toc11 85 MAX2051 toc10 PRF = 0dBm 2LO-2RF RESPONSE (dBc) 2LO-2RF RESPONSE (dBc) 85 2LO-2RF RESPONSE vs. IF FREQUENCY (DOWNCONVERSION MODE) MAX2051 toc15 2LO-2RF RESPONSE vs. IF FREQUENCY (DOWNCONVERSION MODE) VCC = 4.75V, 5.0V, 5.25V -20 -30 -40 -50 1250 1440 1630 1820 2010 2200 LO FREQUENCY (MHz) _______________________________________________________________________________________ 7 MAX2051 Typical Operating Characteristics (continued) (Typical Application Circuit, Downconversion mode, VCC = +5.0V, PLO = 0dBm, PRF = 0dBm, fRF = 1200MHz, LO is high-side injected, TC = +25C, unless otherwise noted.) Typical Operating Characteristics (continued) (Typical Application Circuit, Downconversion mode, VCC = +5.0V, PLO = 0dBm, PRF = 0dBm, fRF = 1200MHz, LO is high-side injected, TC = +25C, unless otherwise noted.) 50 TC = -40C 40 TC = +25C 30 1440 1630 1820 2010 70 60 50 PLO = -3dBm, 0dBm, +3dBm 50 40 VCC = 4.75V, 5.0V, 5.25V 30 20 1250 2200 60 1440 1630 1820 2010 20 1250 2200 1440 1630 1820 2010 2200 LO FREQUENCY (MHz) LO FREQUENCY (MHz) LO FREQUENCY (MHz) LO LEAKAGE AT RF PORT vs. LO FREQUENCY (DOWNCONVERSION MODE) LO LEAKAGE AT RF PORT vs. LO FREQUENCY (DOWNCONVERSION MODE) LO LEAKAGE AT RF PORT vs. LO FREQUENCY (DOWNCONVERSION MODE) -35 TC = +25C -40 TC = +85C -45 -30 PLO = -3dBm, 0dBm, +3dBm -35 -40 -45 -50 1250 1440 1630 1820 2010 -25 VCC = 4.75V, 5.0V, 5.25V -30 -35 -40 -45 -50 1250 2200 MAX2051 toc24 -25 -20 LO LEAKAGE AT RF PORT (dBm) TC = -40C -30 MAX2051 toc23 -25 -20 LO LEAKAGE AT RF PORT (dBm) MAX2051 toc22 -20 1440 1630 1820 2010 -50 1250 2200 1440 1630 1820 2010 2200 LO FREQUENCY (MHz) LO FREQUENCY (MHz) LO FREQUENCY (MHz) RF PORT RETURN LOSS vs. RF FREQUENCY (DOWNCONVERSION MODE) RF PORT RETURN LOSS vs. LO FREQUENCY (DOWNCONVERSION MODE) IF PORT RETURN LOSS vs. IF FREQUENCY (DOWNCONVERSION MODE) 10 15 PLO = -3dBm, 0dBm, +3dBm 20 5 fRF = 1400MHz fRF = 1300MHz 10 15 fRF = 1100MHz fRF = 1200MHz 25 30 1000 0 MAX2051 toc27 fIF = 50MHz TO 1000MHz 5 IF PORT RETURN LOSS (dB) 5 0 RF PORT RETURN LOSS (dB) fIF = 200MHz MAX2051 toc25 0 VCC = 4.75V, 5.0V, 5.25V 10 15 20 25 1100 1200 1300 RF FREQUENCY (MHz) 8 fRF = 1200MHz 30 20 1250 LO LEAKAGE AT RF PORT (dBm) MAX2051 toc20 70 40 80 RF-TO-IF ISOLATION (dB) TC = +85C 60 fRF = 1200MHz MAX2051 toc26 RF-TO-IF ISOLATION (dB) 70 80 RF-TO-IF ISOLATION (dB) fRF = 1200MHz MAX2051 toc19 80 RF-TO-IF ISOLATION vs. LO FREQUENCY (DOWNCONVERSION MODE) RF-TO-IF ISOLATION vs. LO FREQUENCY (DOWNCONVERSION MODE) MAX2051 toc21 RF-TO-IF ISOLATION vs. LO FREQUENCY (DOWNCONVERSION MODE) RF PORT RETURN LOSS (dB) MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer 1400 1500 20 1100 30 1425 1750 2075 LO FREQUENCY (MHz) 2400 50 240 430 620 IF FREQUENCY (MHz) _______________________________________________________________________________________ 810 1000 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer SUPPLY CURRENT vs. EXPOSED PAD TEMPERATURE (TC) (DOWNCONVERSION MODE) PLO = -3dBm 10 PLO = +3dBm VCC = 5.25V 1.0pF LSB, USB 110 100 90 10 35 60 50 85 250 650 850 IF FREQUENCY (MHz) 2RF-LO vs. IF FREQUENCY (ALTERNATIVE VALUES OF C2) 2LO-2RF vs. IF FREQUENCY (ALTERNATIVE VALUES OF C2) 3LO-3RF vs. IF FREQUENCY (ALTERNATIVE VALUES OF C2) -50 -55 2LO-2RF (dBc) 1.5pF 2.0pF -75 fRF = 1200MHz 1.0pF, 1.5pF, 2.0pF OPEN 2.0pF -60 -65 OPEN fRF = 1200MHz OPEN -60 -65 1.0pF 1.5pF -70 -75 1.0pF -85 -75 590 770 950 50 230 IF FREQUENCY (MHz) 410 590 770 230 -70 -75 -50 MAX2051 toc34 DOWNCONVERSION MODE fRF = 1200MHz P = -3dBm LO PLO = 0dBm PLO = +3dBm -80 PLO = +6dBm -85 PLO = +9dBm 410 590 770 950 IF FREQUENCY (MHz) 2LO-2RF vs. IF FREQUENCY (VARIOUS LO DRIVE LEVELS) -55 2LO-2RF (dBc) 2RF-LO (dBc) -65 50 IF FREQUENCY (MHz) 2RF-LO vs. IF FREQUENCY (VARIOUS LO DRIVE LEVELS) -60 950 2.0pF 2.0pF -80 DOWNCONVERSION MODE fRF = 1200MHz PLO = -3dBm -60 PLO = 0dBm PLO = +3dBm -65 -70 PLO = +6dBm PLO = +9dBm -75 -90 MAX2051 toc35 410 1.0pF 1.5pF OPEN 1.5pF -80 230 1050 PRF = 0dBm DOWNCONVERSION MODE -55 -70 OPEN 2.0pF -50 3LO-3RF (dBc) 1.0pF PRF = 0dBm DOWNCONVERSION MODE MAX2051 toc32 PRF = 0dBm 1.5pF 50 450 EXPOSED PAD TEMPERATURE (C) fRF = 1200MHz OPEN 1.0pF -70 OPEN LSB, USB 26 -15 -40 2500 2.0pF LSB, USB LO FREQUENCY (MHz) DOWNCONVERSION MODE -65 2RF-LO (dBc) 2240 MAX2051 toc31 -60 1980 32 28 70 1720 34 30 VCC = 4.75V 80 1460 1.5pF LSB, USB 36 15 20 1200 DOWNCONVERSION MODE fRF = 1200MHz PRF = 0dBm/TONE 38 IIP3 (dBm) PLO = 0dBm VCC = 5.0V MAX2051 toc30 120 5 40 MAX2051 toc33 MAX2051 toc28 130 SUPPLY CURRENT (mA) LO PORT RETURN LOSS (dB) 0 IIP3 vs. IF FREQUENCY (ALTERNATIVE VALUES OF C2) MAX2051 toc29 LO PORT RETURN LOSS vs. LO FREQUENCY (DOWNCONVERSION MODE) -80 50 240 430 620 IF FREQUENCY (MHz) 810 1000 50 240 430 620 810 1000 IF FREQUENCY (MHz) _______________________________________________________________________________________ 9 MAX2051 Typical Operating Characteristics (continued) (Typical Application Circuit, Downconversion mode, VCC = +5.0V, PLO = 0dBm, PRF = 0dBm, fRF = 1200MHz, LO is high-side injected, TC = +25C, unless otherwise noted.) Typical Operating Characteristics (continued) (Typical Application Circuit, Upconversion mode, VCC = +5.0V, PLO = 0dBm, PIF = 0dBm, fIF = 350MHz, LO is high-side injected, TC = +25C, unless otherwise noted.) CONVERSION LOSS vs. RF FREQUENCY (UPCONVERSION MODE) 8 7 TC = -40C 6 8 7 PLO = -3dBm, 0dBm, +3dBm 6 990 1130 1270 1410 7 VCC = 4.75V, 5.0V, 5.25V 5 850 1550 990 1130 1270 1410 1550 850 990 1130 1270 1410 RF FREQUENCY (MHz) RF FREQUENCY (MHz) RF FREQUENCY (MHz) INPUT IP3 vs. RF FREQUENCY (UPCONVERSION MODE) INPUT IP3 vs. RF FREQUENCY (UPCONVERSION MODE) INPUT IP3 vs. RF FREQUENCY (UPCONVERSION MODE) PIF = 0dBm/TONE 38 40 PIF = 0dBm/TONE 38 40 MAX2051 toc40 40 MAX2051 toc39 850 8 6 5 5 MAX2051 toc38 9 CONVERSION LOSS (dB) 9 CONVERSION LOSS (dB) CONVERSION LOSS (dB) TC = +25C 10 MAX2051 toc37 TC = +85C 9 10 MAX2051 toc36 10 CONVERSION LOSS vs. RF FREQUENCY (UPCONVERSION MODE) 38 1550 PIF = 0dBm/TONE VCC = 5.25V VCC = 5.0V MAX2051 toc41 CONVERSION LOSS vs. RF FREQUENCY (UPCONVERSION MODE) TC = +25C 34 32 36 INPUT IP3 (dBm) 36 INPUT IP3 (dBm) INPUT IP3 (dBm) TC = -40C 34 32 36 34 32 PLO = -3dBm, 0dBm, +3dBm TC = +85C 30 30 28 990 1130 1270 1410 1550 VCC = 4.75V 28 850 990 1130 1270 1410 1550 850 990 1130 1270 1410 1550 RF FREQUENCY (MHz) RF FREQUENCY (MHz) LO-2IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) LO-2IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) LO-2IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) 60 TC = -40C PLO = 0dBm 70 PLO = +3dBm 60 PLO = -3dBm 50 50 850 990 1130 1270 RF FREQUENCY (MHz) 1410 1550 70 60 VCC = 4.75V, 5.0V, 5.25V 50 40 40 PIF = 0dBm LO-2IF RESPONSE (dBc) TC = +25C 80 MAX2051 toc43 PIF = 0dBm LO-2IF RESPONSE (dBc) TC = +85C 70 80 MAX2051 toc42 PIF = 0dBm MAX2051 toc44 RF FREQUENCY (MHz) 80 10 30 28 850 LO-2IF RESPONSE (dBc) MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer 40 850 990 1130 1270 RF FREQUENCY (MHz) 1410 1550 850 990 1130 1270 RF FREQUENCY (MHz) ______________________________________________________________________________________ 1410 1550 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer TC = -40C 50 850 990 1130 1270 1410 PLO = -3dBm 50 70 VCC = 5.25V 60 VCC = 4.75V, 5.0V 50 40 850 1550 990 1130 1270 1410 850 1550 990 1130 1270 1410 1550 RF FREQUENCY (MHz) RF FREQUENCY (MHz) RF FREQUENCY (MHz) LO-3IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) LO-3IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) LO-3IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) 80 TC = +85C 90 PLO = -3dBm, 0dBm, +3dBm 80 70 60 60 850 990 1130 1270 1410 90 VCC = 4.75V, 5.0V, 5.25V 80 70 60 850 1550 MAX2051 toc50 PIF = 0dBm LO-3IF RESPONSE (dBc) TC = +25C TC = -40C PIF = 0dBm LO-3IF RESPONSE (dBc) 90 100 MAX2051 toc49 PIF = 0dBm 70 100 MAX2051 toc48 100 990 1130 1270 1410 1550 850 990 1130 1270 1410 1550 RF FREQUENCY (MHz) RF FREQUENCY (MHz) LO+3IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) LO+3IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) LO+3IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) PIF = 0dBm LO+3IF RESPONSE (dBc) 90 TC = +85C 80 70 100 TC = +25C 90 100 PIF = 0dBm LO+3IF RESPONSE (dBc) PIF = 0dBm MAX2051 toc51 100 PLO = -3dBm, 0dBm, +3dBm 80 70 MAX2051 toc53 RF FREQUENCY (MHz) MAX2051 toc52 LO-3IF RESPONSE (dBc) 60 40 40 LO+3IF RESPONSE (dBc) PLO = 0dBm PIF = 0dBm LO+2IF RESPONSE (dBc) TC = +25C PLO = +3dBm 70 MAX2051 toc47 PIF = 0dBm LO+2IF RESPONSE (dBc) LO+2IF RESPONSE (dBc) TC = +85C 70 80 MAX2051 toc46 PIF = 0dBm 60 80 MAX2051 toc45 80 LO+2IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) LO+2IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) LO+2IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) 90 VCC = 4.75V, 5.0V, 5.25V 80 70 TC = -40C 60 60 850 990 1130 1270 RF FREQUENCY (MHz) 1410 1550 60 850 990 1130 1270 RF FREQUENCY (MHz) 1410 1550 850 990 1130 1270 1410 1550 RF FREQUENCY (MHz) ______________________________________________________________________________________ 11 MAX2051 Typical Operating Characteristics (continued) (Typical Application Circuit, Upconversion mode, VCC = +5.0V, PLO = 0dBm, PIF = 0dBm, fIF = 350MHz, LO is high-side injected, TC = +25C, unless otherwise noted.) Typical Operating Characteristics (continued) (Typical Application Circuit, Upconversion mode, VCC = +5.0V, PLO = 0dBm, PIF = 0dBm, fIF = 350MHz, LO is high-side injected, TC = +25C, unless otherwise noted.) -35 TC = +25C TC = +85C 1340 1480 -40 1620 1760 -50 1200 1900 1340 LO FREQUENCY (MHz) -50 -60 1480 1620 1480 1620 MAX2051 toc56 -50 1200 1900 1760 -50 -60 -70 1200 1900 1340 1480 1620 1340 fIF = 350MHz 1760 1900 -40 10 15 PLO = -3dBm, 0dBm, +3dBm 20 25 -60 -70 1200 1340 1480 fLO = 1200MHz 5 10 VCC = 4.75V, 5.0V, 5.25V 15 20 30 750 900 1050 1200 1350 RF FREQUENCY (MHz) 1500 1650 50 1900 -50 25 30 1760 VCC = 4.75V, 5.0V, 5.25V 1620 LO FREQUENCY (MHz) 0 IF PORT RETURN LOSS (dB) 5 1620 -30 IF PORT RETURN LOSS vs. IF FREQUENCY (UPCONVERSION MODE) MAX2051 toc60 0 1480 IF LEAKAGE AT RF PORT vs. LO FREQUENCY (UPCONVERSION MODE) LO FREQUENCY (MHz) RF PORT RETURN LOSS vs. RF FREQUENCY (UPCONVERSION MODE) RF PORT RETURN LOSS (dB) -40 LO FREQUENCY (MHz) PLO = -3dBm, 0dBm, +3dBm -40 LO FREQUENCY (MHz) 12 1760 -30 IF LEAKAGE AT RF PORT (dBm) TC = -40C, +25C, +85C 1340 -35 IF LEAKAGE AT RF PORT vs. LO FREQUENCY (UPCONVERSION MODE) MAX2051 toc57 -30 -70 1200 VCC = 4.75V, 5.0V, 5.25V -30 LO FREQUENCY (MHz) IF LEAKAGE AT RF PORT vs. LO FREQUENCY (UPCONVERSION MODE) -40 -25 -45 -45 IF LEAKAGE AT RF PORT (dBm) -50 1200 -35 MAX2051 toc58 -45 PLO = -3dBm, 0dBm, +3dBm -30 -20 MAX2051 toc59 -40 -25 LO LEAKAGE AT RF PORT vs. LO FREQUENCY (UPCONVERSION MODE) LO LEAKAGE AT RF PORT (dBm) TC = -40C -30 MAX2051 toc55 -25 -20 LO LEAKAGE AT RF PORT (dBm) MAX2051 toc54 LO LEAKAGE AT RF PORT (dBm) -20 LO LEAKAGE AT RF PORT vs. LO FREQUENCY (UPCONVERSION MODE) MAX2051 toc61 LO LEAKAGE AT RF PORT vs. LO FREQUENCY (UPCONVERSION MODE) IF LEAKAGE AT RF PORT (dBm) MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer 140 230 320 410 500 IF FREQUENCY (MHz) ______________________________________________________________________________________ 1760 1900 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer LO RETURN LOSS vs. LO FREQUENCY (UPCONVERSION MODE) IF PORT RETURN LOSS vs. IF FREQUENCY (UPCONVERSION MODE) 20 30 fLO = 1900MHz 50 140 230 320 410 IF FREQUENCY (MHz) 5 PLO = -3dBm PLO = 0dBm 10 PLO = +3dBm 15 40 50 MAX2051 toc63 fLO = 1200MHz MAX2051 toc62 fLO = 1500MHz 10 0 LO RETURN LOSS (dB) IF PORT RETURN LOSS (dB) 0 500 20 1100 1250 1400 1550 1700 1850 2000 LO FREQUENCY (MHz) Pin Description PIN NAME FUNCTION 1 RF Single-Ended 50 RF Input. Internally matched and DC shorted to GND through a balun. Requires an input DC-blocking capacitor. 2-5, 9, 10, 11, 13, 14 GND Ground. Internally connected to the exposed pad. Connect all ground pins and the exposed pad (EP) together. 6, 8, 15 VCC Power Supply. Bypass to GND with capacitors as close as possible to the pin (see the Typical Application Circuit). 7 LOBIAS LO Amplifier Bias Control. Output bias resistor for the LO buffer. Connect a 61.9 1% resistor from LOBIAS to VCC to set the bias current for the main LO amplifier. 12 LO 16, 17 IF+, IF- 18, 19, 20 GND -- EP Local Oscillator Input. This input is internally matched to 50. Requires an input DC-blocking capacitor. Differential IF Output Ground. Not internally connected. Ground these pins or leave unconnected. Exposed Pad. Internally connected to GND. Solder this exposed pad to a PCB pad that uses multiple ground vias to provide heat transfer out of the device into the PCB ground planes. These multiple ground vias are also required to achieve the noted RF performance. ______________________________________________________________________________________ 13 MAX2051 Typical Operating Characteristics (continued) (Typical Application Circuit, Upconversion mode, VCC = +5.0V, PLO = 0dBm, PIF = 0dBm, fIF = 350MHz, LO is high-side injected, TC = +25C, unless otherwise noted.) MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer Detailed Description The MAX2051 high-linearity up/downconversion mixer provides +35dBm of IIP3, with a typical 7.8dB noise figure (NF) and 7.4dB conversion loss. The integrated baluns and matching circuitry allow for 50 singleended interfaces to the RF and the LO ports. The integrated LO buffer provides a high drive level to the mixer core, reducing the LO drive required at the MAX2051's input to a -3dBm to +3dBm range. The IF port incorporates a differential output, which is ideal for providing enhanced 2RF-LO and 2LO-2RF performance. 2RF-LO rejection is typically 88dB and 2LO-2RF rejection is typically 79dB at an RF drive level of -14dBm. Specifications are guaranteed over broad frequency ranges to allow for use in VOD, DOCSIS-compatible Edge QAM modulation, and CMTS. The MAX2051 is specified to operate over an RF input range of 850MHz to 1550MHz, an LO range of 1200MHz to 2250MHz, and an IF range of 50MHz to 1000MHz. RF Port and Balun The MAX2051 RF input provides a 50 match when combined with a series 47pF DC-blocking capacitor. This DCblocking capacitor is required because the input is internally DC shorted to ground through the on-chip balun. The RF port input return loss is typically 12dB over the RF frequency range of 1000MHz to 1250MHz. LO Inputs, Buffer, and Balun The MAX2051 is optimized for high-side LO injection applications with a 1200MHz to 2250MHz LO frequency range. The LO input is internally matched to 50, requiring only a 47pF DC-blocking capacitor. A twostage internal LO buffer allows for a -3dBm to +3dBm LO input power range. The on-chip low-loss balun, along with an LO buffer, drives the double-balanced mixer. All interfacing and matching components from the LO inputs to the IF outputs are integrated on-chip. High-Linearity Mixer The core of the MAX2051 is a double-balanced, highperformance passive mixer. Exceptional linearity is provided by the large LO swing from the on-chip LO buffer. IIP3, 2RF-LO rejection, and noise figure performance are typically +35dBm, 88dBc, and 7.8dB, respectively. Differential IF Output The MAX2051 has an IF frequency range of 50MHz to 1000MHz. The device's differential ports are ideal for providing enhanced 2RF-LO performance. Singleended IF applications require a 1:1 (impedance ratio) balun to transform the 50 differential IF impedance to a 50 single-ended system. Applications Information Input and Output Matching The RF and LO ports are designed to operate in a 50 system. Use DC blocks at RF and LO inputs to isolate the ports from external DC while providing some reactive tuning. The IF output impedance is 50 (differential). For evaluation, an external low-loss 1:1 balun transforms this impedance to a 50 single-ended output (see the Typical Application Circuit). Externally Adjustable Bias Bias currents for the LO buffer is optimized by fine-tuning resistor R1. The value for R1, as listed in Table 1, represents the nominal value, which yields the optimal linearity/performance trade off. Use larger value resistors (up to 125) to reduce power dissipation at the expense of some performance loss. Use smaller value resistors (down to 0) to increase the linearity of the device at the expense of more power. Contact the factory for details concerning recommended power reduction vs. performance trade-offs. If 1% resistors are not readily available, 5% resistors can be substituted. Table 1. Component Values DESIGNATION QTY C1, C9 2 47pF microwave capacitors (0402) Murata Electronics North America, Inc. C2 1 1.3pF microwave capacitor (0402) Murata Electronics North America, Inc. 14 DESCRIPTION SUPPLIER C3, C4 2 150pF microwave capacitors (0402) Murata Electronics North America, Inc. C5, C7, C10 3 100pF microwave capacitors (0402) Murata Electronics North America, Inc. C6, C8, C11 3 0.01F microwave capacitors (0402) Murata Electronics North America, Inc. R1 1 61.9 1% resistor (0402) Digi-Key Corp. T1 1 1:1 transformer (50:50) MABACT0060 M/A-Com, Inc. U1 1 MAX2051 IC (20 TQFN-EP) Maxim Integrated Products, Inc. ______________________________________________________________________________________ SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer IIP3 linearity and spurious performance can be further optimized by modifying the capacitive loading on the IF ports. The default component value of 1.3pF for C2 (listed in Table 1) was chosen to provide the best overall IIP3 linearity response over the entire 50MHz to 1000MHz band. Alternative capacitor values can be chosen to improve the device's 2RF-LO, 2LO-2RF, and 3LO-3RF spurious responses at the expense of overall IIP3 performance. See the relevant curves in the Typical Operating Characteristics section to evaluate the IIP3 vs. spurious performance trade-offs. Spurious Optimization by Increased LO Drive Levels The MAX2051's 2RF-LO, 2LO-2RF, and 3LO-3RF spurious performance can also be improved by increasing the LO drive level to the device. The Typical Application Circuit calls for a nominal LO drive level of 0dBm. However, enhancements in the device's spurious performance are possible with increased drive levels extending up to +9dBm. See the relevant curves in the Typical Operating Characteristics section to evaluate the spurious performance vs. LO drive level trade-offs. Layout Considerations A properly designed PCB is an essential part of any RF/microwave circuit. Keep RF signal lines as short as possible to reduce losses, radiation, and inductance. The load impedance presented to the mixer must be such that any capacitance from both IF- and IF+ to ground is minimized. For the best performance, route the ground pin traces directly to the exposed pad under the package. The PCB exposed pad MUST be connected to the ground plane of the PCB. It is suggested that multiple vias be used to connect this pad to the lower level ground planes. This method provides a good RF/thermal-conduction path for the device. Solder the exposed pad on the bottom of the device package to the PCB. The MAX2051 evaluation kit can be used as a reference for board layout. Gerber files are available upon request at www.maxim-ic.com. Power-Supply Bypassing Proper voltage supply bypassing is essential for highfrequency circuit stability. Bypass each VCC pin with the capacitors shown in the Typical Application Circuit and see Table 1 for descriptions. Exposed Pad RF/Thermal Considerations The exposed pad (EP) of the MAX2051's 20-pin thin QFN package provides a low thermal-resistance path to the die. It is important that the PCB on which the MAX2051 is mounted be designed to conduct heat from the EP. In addition, provide the EP with a lowinductance path to electrical ground. The EP MUST be soldered to a ground plane on the PCB, either directly or through an array of plated via holes. ______________________________________________________________________________________ 15 MAX2051 IIP3 and Spurious Optimization by External IF Tuning MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer Typical Application Circuit T1 IF C3 C4 + 20 19 18 C1 RF IF+ IF- GND GND GND C2 17 16 VCC EP* RF GND GND GND GND 1 15 2 14 3 13 4 12 5 11 VCC C10 GND C11 GND LO C9 LO GND C5 VCC R1 C6 10 GND 9 GND 8 VCC 7 LOBIAS VCC 6 VCC MAX2051 C7 C8 *EXPOSED PAD. CONNECT EP TO GND. Package Information Chip Information PROCESS: SiGe BiCMOS For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 20 Thin QFN-EP T2055+3 21-0140 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX2051ETP+ MAX2051ETP+T