19-4419; Rev 0; 1/09 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch The MAX19995A dual-channel downconverter is designed to provide 8.7dB of conversion gain, +24.8dBm input IP3, +13.5dBm 1dB input compression point, and a noise figure of 9.2dB for 1700MHz to 2200MHz diversity receiver applications. With an optimized LO frequency range of 1750MHz to 2700MHz, this mixer is ideal for high-side LO injection architectures. Low-side LO injection is supported by the MAX19995, which is pin-pin and functionally compatible with the MAX19995A. In addition to offering excellent linearity and noise performance, the MAX19995A also yields a high level of component integration. This device includes two doublebalanced passive mixer cores, two LO buffers, a dualinput LO selectable switch, and a pair of differential IF output amplifiers. Integrated on-chip baluns allow for single-ended RF and LO inputs. The MAX19995A requires a nominal LO drive of 0dBm and a typical supply current of 350mA at VCC = 5.0V, or 242mA at VCC = 3.3V. The MAX19995/MAX19995A are pin compatible with the MAX19985/MAX19985A series of 700MHz to 1000MHz mixers and pin similar to the MAX19997A/MAX19999 series of 1800MHz to 4000MHz mixers, making this entire family of downconverters ideal for applications where a common PCB layout is used across multiple frequency bands. The MAX19995A is available in a 6mm x 6mm, 36-pin thin QFN package with an exposed pad. Electrical performance is guaranteed over the extended temperature range (TC = -40°C to +85°C). Applications UMTS/WCDMA Base Stations LTE/WiMAX™ Base Stations Features ♦ 1700MHz to 2200MHz RF Frequency Range ♦ 1750MHz to 2700MHz LO Frequency Range ♦ 50MHz to 500MHz IF Frequency Range ♦ 8.7dB Typical Conversion Gain ♦ 9.2dB Typical Noise Figure ♦ +24.8dBm Typical Input IP3 ♦ +13.5dBm Typical Input 1dB Compression Point ♦ 64dBc Typical 2LO-2RF Spurious Rejection at PRF = -10dBm ♦ Dual Channels Ideal for Diversity Receiver Applications ♦ 48dB Typical Channel-to-Channel Isolation ♦ Low -3dBm to +3dBm LO Drive ♦ Integrated LO Buffer ♦ Internal RF and LO Baluns for Single-Ended Inputs ♦ Built-In SPDT LO Switch with 48dB LO-to-LO Isolation and 50ns Switching Time ♦ Pin Compatible with the MAX19985/MAX19985A/ MAX19995 Series of 700MHz to 2200MHz Mixers ♦ Pin Similar to the MAX19997A/MAX19999 Series of 1800MHz to 4000MHz Mixers ♦ Single 5.0V or 3.3V Supply ♦ External Current-Setting Resistors Provide Option for Operating Device in Reduced-Power/ReducedPerformance Mode TD-SCDMA Base Stations DCS1800/PCS1900 and GSM/EDGE Base Stations cdma2000® Base Stations Fixed Broadband Wireless Access Wireless Local Loop Private Mobile Radios Ordering Information PART MAX19995AETX+ TEMP RANGE PIN-PACKAGE -40°C to +85°C 36 Thin QFN-EP* MAX19995AETX+T -40°C to +85°C 36 Thin QFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. T = Tape and reel. Military Systems WiMAX is a trademark of WiMAX Forum. cdma2000 is a registered trademark of Telecommunications Industry Association. Pin Configuration/Functional Diagram appears at end of data sheet. ________________________________________________________________ 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 MAX19995A General Description MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch ABSOLUTE MAXIMUM RATINGS θJA (Notes 2, 3)..............................................................+38°C/W θJC (Notes 1, 3)...............................................................7.4°C/W Operating Case Temperature Range (Note 4) ....-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C VCC to GND ...........................................................-0.3V to +5.5V LO1, LO2 to GND ..................................................-0.3V to +0.3V LOSEL to GND ...........................................-0.3V to (VCC + 0.3V) RFMAIN, RFDIV, and LO_ Input Power ..........................+15dBm RFMAIN, RFDIV Current (RF is DC shorted to GND through a balun)..............................................................50mA Continuous Power Dissipation (Note 1) ...............................8.7W Note 1: Based on junction temperature TJ = TC + (θJC 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 +150°C. Note 2: Junction temperature TJ = TA + (θJA x VCC x ICC). This formula can be used when the ambient temperature of the PCB is known. The junction temperature must not exceed +150°C. 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. 5.0V SUPPLY DC ELECTRICAL CHARACTERISTICS (Typical Application Circuit, VCC = 4.75V to 5.25V, no input AC signals. TC = -40°C to +85°C, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ. Typical values are at VCC = 5.0V, TC = +25°C, unless otherwise noted. All parameters are production tested.) PARAMETER SYMBOL Supply Voltage VCC Supply Current ICC LOSEL Input High Voltage VIH LOSEL Input Low Voltage LOSEL Input Current CONDITIONS MIN 4.75 Total supply current, VCC = 5.0V TYP MAX 5 5.25 V 350 410 mA 2 V VIL IIH and IIL UNITS -10 0.8 V +10 µA 3.3V SUPPLY DC ELECTRICAL CHARACTERISTICS (Typical Application Circuit, VCC = 3.0V to 3.6V, no input AC signals. TC = -40°C to +85°C, R1 = R4 = 909Ω, R2 = R5 = 1kΩ. Typical values are at VCC = 3.3V, TC = +25°C, unless otherwise noted. Parameters are guaranteed by design and not production tested.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX 3.0 3.3 3.6 UNITS V 242 300 mA Supply Voltage VCC Supply Current ICC LOSEL Input High Voltage VIH 2 V LOSEL Input Low Voltage VIL 0.8 V 2 Total supply current _______________________________________________________________________________________ Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch MAX UNITS RF Frequency PARAMETER fRF (Note 5) 1700 2200 MHz LO Frequency fLO (Note 5) 1750 2700 MHz Using Mini-Circuits TC4-1W-17 4:1 transformer as defined in the Typical Application Circuit, IF matching components affect the IF frequency range (Note 5) 100 500 IF Frequency SYMBOL fIF LO Drive Level CONDITIONS MIN TYP MHz Using alternative Mini-Circuits TC4-1W-7A 4:1 transformer as defined in the Typical Application Circuit, IF matching components affect the IF frequency range (Note 5) PLO 50 250 -3 +3 dBm 5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 4.75V to 5.25V, RF and LO ports are driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 1700MHz to 2000MHz, fLO = 2050MHz to 2350MHz, fIF = 350MHz, fRF < fLO, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C. All parameters are guaranteed by design and characterization, unless otherwise noted.) (Note 6) PARAMETER Conversion Gain SYMBOL GC Conversion Gain Flatness ΔGC CONDITIONS MIN TYP MAX 6.5 8.7 10.4 TC = +25°C (Note 7) 7.1 8.7 9.9 TC = +25°C, fRF = 1850MHz (Note 8) 7.7 8.7 9.7 +0.07 fRF = 1850MHz to 1910MHz -0.03 fRF = 1920MHz to 1980MHz -0.13 -0.011 dB/°C dBm dB Gain Variation Over Temperature TCCG Input Compression Point IP1dB fRF = 1850MHz (Notes 7, 9) 9.5 13.5 fRF1 - fRF2 = 1MHz, PRF = -5dBm per tone 21.5 24.8 fRF1 - fRF2 = 1MHz, PRF = -5dBm per tone, TC = +25°C 22 24.8 IIP3 Input Third-Order Intercept Point Variation Over Temperature TCIIP3 Noise Figure (Note 10) NFSSB Noise Figure Temperature Coefficient TCNF dB Flatness over any one of three frequency bands: fRF = 1710MHz to 1785MHz fRF = 1700MHz to 2000MHz, fLO = 2050MHz to 2350MHz, TC = -40°C to +85°C Input Third-Order Intercept Point UNITS fRF1 - fRF2 = 1MHz, PRF = -5dBm per tone, TC = -40°C to +85°C dBm 0.006 dBm/°C Single sideband, no blockers present 9.2 11.1 fRF = 1850MHz, fLO = 2200MHz, TC = +25°C, PLO = 0dBm, single sideband, no blockers present 9.2 9.8 Single sideband, no blockers present, TC = -40°C to +85°C 0.016 dB dB/°C _______________________________________________________________________________________ 3 MAX19995A RECOMMENDED AC OPERATING CONDITIONS MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 4.75V to 5.25V, RF and LO ports are driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 1700MHz to 2000MHz, fLO = 2050MHz to 2350MHz, fIF = 350MHz, fRF < fLO, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C. All parameters are guaranteed by design and characterization, unless otherwise noted.) (Note 6) PARAMETER Noise Figure with Blocker SYMBOL NFB CONDITIONS fRF = 1850MHz, fLO = 2200MHz, fSPUR = 2025MHz 2LO-2RF Spur Rejection (Note 10) 2x2 fRF = 1850MHz, fLO = 2200MHz, fSPUR = 2025MHz, PLO = 0dBm, VCC = 5.0V, TC = +25°C fRF = 1850MHz, fLO = 2200MHz, fSPUR = 2083.33MHz 3LO-3RF Spur Rejection (Note 10) 3x3 RF Input Return Loss LO Input Return Loss MIN PBLOCKER = +8dBm, fRF = 1850MHz, fLO = 2200MHz, fBLOCKER = 1725MHz, PLO = 0dBm, VCC = 5.0V, TC = +25°C (Notes 10, 11) fRF = 1850MHz, fLO = 2200MHz, fSPUR = 2083.33MHz, PLO = 0dBm, VCC = 5.0V, TC = +25°C TYP MAX UNITS 19.7 23.4 dB PRF = -10dBm 54 64 PRF = -5dBm 49 59 PRF = -10dBm 57 64 PRF = -5dBm 52 59 PRF = -10dBm 70 80 PRF = -5dBm 60 70 PRF = -10dBm 71 80 PRF = -5dBm 61 70 LO and IF terminated into matched impedance, LO on 21 LO port selected, RF and IF terminated into matched impedance 20 dBc dBc dB dB LO port unselected, RF and IF terminated into matched impedance 22 Nominal differential impedance of the IF outputs 200 Ω IF Output Return Loss RF terminated into 50Ω, LO driven by 50Ω source, IF transformed to 50Ω using external components shown in the Typical Application Circuit 11.5 dB RF-to-IF Isolation (Note 8) LO Leakage at RF Port (Note 8) -35 -25 dBm 2LO Leakage at RF Port (Note 8) -17.5 -14 dBm LO Leakage at IF Port (Note 8) -32 -22 dBm IF Output Impedance 4 ZIF 31 35 _______________________________________________________________________________________ dB Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 4.75V to 5.25V, RF and LO ports are driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 1700MHz to 2000MHz, fLO = 2050MHz to 2350MHz, fIF = 350MHz, fRF < fLO, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C. All parameters are guaranteed by design and characterization, unless otherwise noted.) (Note 6) PARAMETER SYMBOL MIN TYP RFMAIN converted power measured at IFDIV relative to IFMAIN, all unused ports terminated to 50Ω 40 48 RFDIV converted power measured at IFMAIN relative to IFDIV, all unused ports terminated to 50Ω 40 48 LO-to-LO Isolation PLO1 = +3dBm, PLO2 = +3dBm, fLO1 = 2200MHz, fLO2 = 2201MHz (Note 7) 40 48 dB LO Switching Time 50% of LOSEL to IF settled within 2 degrees 50 ns Channel Isolation (Note 7) CONDITIONS MAX UNITS dB 3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 1kΩ. Typical values are at VCC = 3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) (Note 6) PARAMETER Conversion Gain SYMBOL GC Conversion Gain Flatness ΔGC CONDITIONS (Note 8) MIN TYP 8.4 Flatness over any one of three frequency bands: fRF = 1710MHz to 1785MHz +0.07 fRF = 1850MHz to 1910MHz -0.03 MAX UNITS dB dB fRF = 1920MHz to 1980MHz -0.13 Gain Variation Over Temperature TCCG TC = -40°C to +85°C -0.013 dB/°C Input Compression Point IP1dB (Note 9) 10.2 dBm fRF1 - fRF2 = 1MHz 22.5 dBm 0.0017 dBm/°C Input Third-Order Intercept Point IIP3 Input Third-Order Intercept Point Variation Over Temperature TCIIP3 fRF1 - fRF2 = 1MHz, PRF = -5dBm per tone, TC = -40°C to +85°C Noise Figure NFSSB Single sideband, no blockers present 9 dB Noise Figure Temperature Coefficient TCNF Single sideband, no blockers present, TC = -40°C to +85°C 0.016 dB/°C 2LO-2RF Spur Rejection 2x2 3LO-3RF Spur Rejection 3x3 RF Input Return Loss PRF = -10dBm 65 PRF = -5dBm 60 PRF = -10dBm 77 PRF = -5dBm 67 LO and IF terminated into matched impedance, LO on 25 dBc dBc dB _______________________________________________________________________________________ 5 MAX19995A 5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 1kΩ. Typical values are at VCC = 3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) (Note 6) PARAMETER LO Input Return Loss IF Output Return Loss SYMBOL CONDITIONS MIN TYP LO port selected, RF and IF terminated into matched impedance 22 LO port unselected, RF and IF terminated into matched impedance 16 RF terminated into 50Ω, LO driven by 50Ω source, IF transformed to 50Ω using external components shown in the Typical Application Circuit 11.5 MAX UNITS dB dB RF-to-IF Isolation 36 dB LO Leakage at RF Port -40 dBm 2LO Leakage at RF Port -23 dBm LO Leakage at IF Port -37 dBm RFMAIN converted power measured at IFDIV relative to IFMAIN, all unused ports terminated to 50Ω 48 RFDIV converted power measured at IFMAIN relative to IFDIV, all unused ports terminated to 50Ω 48 LO-to-LO Isolation PLO1 = +3dBm, PLO2 = +3dBm, fLO1 = 2200MHz, fLO2 = 2201MHz 47 dB LO Switching Time 50% of LOSEL to IF settled within 2 degrees 50 ns Channel Isolation dB Not production tested. Operation outside this range is possible, but with degraded performance of some parameters. See the Typical Operating Characteristics. Note 6: All limits reflect losses of external components, including a 0.9dB loss at fIF = 350MHz due to the 4:1 transformer. Output measurements were taken at IF outputs of the Typical Application Circuit. Note 7: 100% production tested. Note 8: 100% production tested for functionality. Note 9: Maximum reliable continuous input power applied to the RF or IF port of this device is +12dBm from a 50Ω source. Note 10: Not production tested. Note 11: Measured with external LO source noise filtered so the noise floor is -174dBm/Hz. This specification reflects the effects of all SNR degradations in the mixer, including the LO noise as defined in Application Note 2021: Specifications and Measurement of Local Oscillator Noise in Integrated Circuit Base Station Mixers. Note 5: 6 _______________________________________________________________________________________ Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch CONVERSION GAIN vs. RF FREQUENCY TC = +85°C 8 PLO = -3dBm, 0dBm, +3dBm 7 TC = +25°C 6 6 1900 2000 2100 1800 INPUT IP3 vs. RF FREQUENCY 2100 2200 PLO = +3dBm TC = +25°C TC = -30°C 23 24 PLO = -3dBm PLO = 0dBm 22 2000 2100 2200 25 1800 1900 2000 2100 2200 NOISE FIGURE (dB) 9 8 2000 RF FREQUENCY (MHz) 2100 2200 2200 10 9 8 VCC = 4.75V, 5.0V, 5.25V 6 6 1900 2100 7 7 6 2000 11 PLO = -3dBm, 0dBm, +3dBm TC = -30°C 1900 NOISE FIGURE vs. RF FREQUENCY 10 TC = +25°C 1800 1800 12 MAX19995A toc08 11 NOISE FIGURE (dB) 8 1700 1700 RF FREQUENCY (MHz) 12 MAX19995A toc07 9 VCC = 4.75V VCC = 5.0V NOISE FIGURE vs. RF FREQUENCY 10 7 24 22 1700 NOISE FIGURE vs. RF FREQUENCY TC = +85°C 2200 PRF = -5dBm/TONE RF FREQUENCY (MHz) 11 2100 23 RF FREQUENCY (MHz) 12 2000 VCC = 5.25V 22 1900 1900 26 23 1800 1800 INPUT IP3 vs. RF FREQUENCY PRF = -5dBm/TONE 25 INPUT IP3 (dBm) 24 1700 MAX19995A toc03 1700 RF FREQUENCY (MHz) 26 MAX19995A toc04 PRF = -5dBm/TONE 25 INPUT IP3 (dBm) 2000 INPUT IP3 vs. RF FREQUENCY 26 NOISE FIGURE (dB) 1900 RF FREQUENCY (MHz) RF FREQUENCY (MHz) TC = +85°C VCC = 4.75V, 5.0V, 5.25V 6 1700 2200 8 MAX19995A toc09 1800 INPUT IP3 (dBm) 1700 9 7 MAX19995A toc05 7 9 CONVERSION GAIN (dB) 8 CONVERSION GAIN vs. RF FREQUENCY 10 MAX19995A toc02 MAX19995A toc01 9 CONVERSION GAIN (dB) CONVERSION GAIN (dB) TC = -30°C 10 MAX19995A toc06 CONVERSION GAIN vs. RF FREQUENCY 10 1700 1800 1900 2000 RF FREQUENCY (MHz) 2100 2200 1700 1800 1900 2000 2100 2200 RF FREQUENCY (MHz) _______________________________________________________________________________________ 7 MAX19995A Typical Operating Characteristics (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) 60 TC = -30°C 70 60 PLO = -3dBm 40 2000 2100 2200 1700 1800 2100 1700 2200 75 65 PRF = -5dBm 1900 2000 2100 65 PLO = -3dBm, 0dBm, +3dBm 2200 1800 1900 2000 2100 TC = -30°C 11 2100 2200 1900 2000 2100 16 PLO = -3dBm, 0dBm, +3dBm VCC = 5.0V 15 INPUT P1dB (dBm) 13 2200 VCC = 5.25V 14 13 12 VCC = 4.75V 11 11 RF FREQUENCY (MHz) 1800 INPUT P1dB vs. RF FREQUENCY 14 12 2000 1700 2200 MAX19995A toc17 15 INPUT P1dB (dBm) TC = +25°C 1900 MAX19995A toc12 VCC = 5.25V INPUT P1dB vs. RF FREQUENCY 14 1800 65 RF FREQUENCY (MHz) 16 MAX19995A toc16 TC = +85°C 1700 VCC = 4.75V 75 55 1700 INPUT P1dB vs. RF FREQUENCY 12 2200 PRF = -5dBm VCC = 5.0V RF FREQUENCY (MHz) 16 13 2100 3LO-3RF RESPONSE vs. RF FREQUENCY 75 RF FREQUENCY (MHz) 15 2000 85 55 1800 1900 TC = -30°C 55 1700 1800 RF FREQUENCY (MHz) 85 3LO-3RF RESPONSE (dBc) PRF = -5dBm TC = +85°C 3LO-3RF RESPONSE (dBc) 2000 3LO-3RF RESPONSE vs. RF FREQUENCY MAX19995A toc13 3LO-3RF RESPONSE vs. RF FREQUENCY 85 TC = +25°C 1900 RF FREQUENCY (MHz) 3LO-3RF RESPONSE (dBc) 1900 RF FREQUENCY (MHz) 8 VCC = 4.75V, 5.0V, 5.25V 40 MAX19995A toc14 1800 60 PLO = 0dBm 40 1700 70 50 50 TC = +25°C 80 MAX19995A toc18 50 PLO = +3dBm PRF = -5dBm MAX19995A toc15 70 80 90 2LO-2RF RESPONSE (dBc) TC = +85°C PRF = -5dBm MAX19995A toc11 80 90 2LO-2RF RESPONSE (dBc) 2LO-2RF RESPONSE (dBc) PRF = -5dBm 2LO-2RF RESPONSE vs. RF FREQUENCY 2LO-2RF RESPONSE vs. RF FREQUENCY MAX19995A toc10 2LO-2RF RESPONSE vs. RF FREQUENCY 90 INPUT P1dB (dBm) MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 1700 1800 1900 2000 RF FREQUENCY (MHz) 2100 2200 1700 1800 1900 2000 RF FREQUENCY (MHz) _______________________________________________________________________________________ 2100 2200 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 45 50 45 PLO = -3dBm, 0dBm, +3dBm TC = -30°C, +25°C, +85°C 40 40 1800 1900 2000 2100 VCC = 4.75V, 5.0V, 5.25V 40 1700 1800 1900 2000 2100 2200 1700 1800 1900 2000 2100 LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs. LO FREQUENCY -35 TC = +25°C -30 -35 -25 VCC = 5.25V -35 VCC = 4.75V -40 2250 2350 2450 VCC = 5.0V -30 TC = -30°C -40 2150 -40 2050 2550 2150 2250 2350 2450 2050 2550 2150 2250 2350 2450 LO FREQUENCY (MHz) LO FREQUENCY (MHz) LO FREQUENCY (MHz) RF-TO-IF ISOLATION vs. RF FREQUENCY RF-TO-IF ISOLATION vs. RF FREQUENCY RF-TO-IF ISOLATION vs. RF FREQUENCY 35 35 2550 MAX19995A toc27 MAX19995A toc26 PLO = -3dBm, 0dBm, +3dBm 40 45 RF-TO-IF ISOLATION (dB) TC = +85°C 45 RF-TO-IF ISOLATION (dB) MAX19995A toc25 45 2200 MAX19995A toc24 PLO = -3dBm, 0dBm, +3dBm -25 -20 LO LEAKAGE AT IF PORT (dBm) MAX19995A toc22 -30 -20 MAX19995A toc23 RF FREQUENCY (MHz) TC = +85°C 40 45 RF FREQUENCY (MHz) -25 2050 50 RF FREQUENCY (MHz) -20 LO LEAKAGE AT IF PORT (dBm) 2200 LO LEAKAGE AT IF PORT (dBm) 1700 RF-TO-IF ISOLATION (dB) CHANNEL ISOLATION vs. RF FREQUENCY 55 MAX19995A toc21 MAX19995A toc20 CHANNEL ISOLATION (dB) MAX19995A toc19 CHANNEL ISOLATION (dB) 50 CHANNEL ISOLATION vs. RF FREQUENCY 55 CHANNEL ISOLATION (dB) CHANNEL ISOLATION vs. RF FREQUENCY 55 VCC = 4.75V, 5.0V, 5.25V 40 35 TC = +25°C TC = -30°C 30 30 30 1700 1800 1900 2000 RF FREQUENCY (MHz) 2100 2200 1700 1800 1900 2000 RF FREQUENCY (MHz) 2100 2200 1700 1800 1900 2000 2100 2200 RF FREQUENCY (MHz) _______________________________________________________________________________________ 9 MAX19995A Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) TC = -30°C TC = +25°C -40 PLO = -3dBm -30 PLO = 0dBm -40 PLO = +3dBm -20 MAX19995A toc30 MAX19995A toc29 -20 LO LEAKAGE AT RF PORT (dBm) -30 MAX19995A toc28 LO LEAKAGE AT RF PORT (dBm) -20 LO LEAKAGE AT RF PORT vs. LO FREQUENCY LO LEAKAGE AT RF PORT vs. LO FREQUENCY LO LEAKAGE AT RF PORT (dBm) LO LEAKAGE AT RF PORT vs. LO FREQUENCY -30 -40 VCC = 4.75V, 5.0V, 5.25V TC = +85°C -50 1950 2150 2350 2550 1750 1950 2150 2350 2550 1750 2750 2350 2550 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY TC = +85°C -30 PLO = 0dBm -40 2350 -30 VCC = 4.75V, 5.0V, 5.25V -40 -50 -50 2150 -20 PLO = -3dBm -50 1950 2550 2750 1750 1950 2150 2350 2550 1750 2750 1950 2150 2350 2550 LO FREQUENCY (MHz) LO FREQUENCY (MHz) LO SWITCH ISOLATION vs. LO FREQUENCY LO SWITCH ISOLATION vs. LO FREQUENCY LO SWITCH ISOLATION vs. LO FREQUENCY 50 40 TC = +85°C 30 50 40 PLO = -3dBm, 0dBm, +3dBm 2350 LO FREQUENCY (MHz) 2550 2750 MAX19995A toc36 2750 50 40 VCC = 4.75V, 5.0V, 5.25V 30 30 2150 60 LO SWITCH ISOLATION (dB) TC = +25°C MAX19995A toc35 TC = -30°C 60 LO SWITCH ISOLATION (dB) 60 MAX19995A toc34 LO FREQUENCY (MHz) 1950 2750 MAX19995A toc33 PLO = +3dBm -20 -10 2LO LEAKAGE AT RF PORT (dBm) -40 2LO LEAKAGE AT RF PORT (dBm) TC = +25°C -30 -10 MAX19995A toc32 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY TC = -30°C 1750 2150 LO FREQUENCY (MHz) -20 1750 1950 LO FREQUENCY (MHz) MAX19995A toc31 2LO LEAKAGE AT RF PORT (dBm) 2750 LO FREQUENCY (MHz) -10 10 -50 -50 1750 LO SWITCH ISOLATION (dB) MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 1750 1950 2150 2350 LO FREQUENCY (MHz) 2550 2750 1750 1950 2150 2350 LO FREQUENCY (MHz) ______________________________________________________________________________________ 2550 2750 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch IF PORT RETURN LOSS vs. IF FREQUENCY 10 PLO = -3dBm, 0dBm, +3dBm 15 20 L = L1, L2, L4, L5 fLO = 2300MHz VCC = 4.75V, 5.0V, 5.25V L = 120nH 5 L = 330nH 10 15 25 0 MAX19995A toc39 0 LO SELECTED RETURN LOSS (dB) RF PORT RETURN LOSS (dB) 5 LO SELECTED RETURN LOSS vs. LO FREQUENCY MAX19995A toc38 fIF = 350MHz IF PORT RETURN LOSS (dB) 0 MAX19995A toc37 RF PORT RETURN LOSS vs. RF FREQUENCY 5 PLO = -3dBm, 0dBm, +3dBm 10 15 20 25 L = 470nH 30 20 1800 1900 2000 2100 230 320 410 500 1750 1950 2150 2350 2550 2750 IF FREQUENCY (MHz) LO FREQUENCY (MHz) LO UNSELECTED RETURN LOSS vs. LO FREQUENCY SUPPLY CURRENT vs. TEMPERATURE (TC) CONVERSION GAIN vs. RF FREQUENCY (VARIOUS VALUES OF L3 AND L6) VCC = 5.25V 10 15 20 PLO = -3dBm, 0dBm, +3dBm 360 340 VCC = 5.0V 320 25 10 CONVERSION GAIN (dB) 380 SUPPLY CURRENT (mA) 5 11 MAX19995A toc42 400 MAX19995A toc40 9 8 0Ω, 3.6nH, 6.8nH, 10nH 7 VCC = 4.75V 6 300 30 1950 2150 2350 2550 -35 2750 -15 5 25 45 65 1700 85 1800 1900 2000 2100 2200 TEMPERATURE (°C) RF FREQUENCY (MHz) INPUT IP3 vs. RF FREQUENCY (VARIOUS VALUES OF L3 AND L6) 2LO-2RF RESPONSE vs. RF FREQUENCY (VARIOUS VALUES OF L3 AND L6) 3LO-3RF RESPONSE vs. RF FREQUENCY (VARIOUS VALUES OF L3 AND L6) 25 24 0Ω, 3.6nH, 6.8nH, 10nH 23 90 PRF = -5dBm 80 0Ω 70 60 85 PRF = -5dBm 3LO-3RF RESPONSE (dBc) PRF = -5dBm/TONE 2LO-2RF RESPONSE (dBc) 26 MAX19995A toc45 LO FREQUENCY (MHz) MAX19995A toc43 1750 MAX19995A toc44 LO UNSELECTED RETURN LOSS (dB) 140 RF FREQUENCY (MHz) 0 INPUT IP3 (dBm) 30 50 2200 MAX19995A toc41 1700 75 65 0Ω, 3.6nH, 6.8nH, 10nH 50 6.8nH, 10nH 3.6nH 55 40 22 1700 1800 1900 2000 RF FREQUENCY (MHz) 2100 2200 1700 1800 1900 2000 RF FREQUENCY (MHz) 2100 2200 1700 1800 1900 2000 2100 2200 RF FREQUENCY (MHz) ______________________________________________________________________________________ 11 MAX19995A Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = 5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) 50 45 0Ω 3.6nH 10nH -30 -40 6.8nH -50 1800 1900 6.8nH 2000 RF FREQUENCY (MHz) 2100 2200 10nH 40 30 3.6nH 20 0Ω 10 -60 1700 50 3.6nH 40 12 0Ω MAX19995A toc48 6.8nH -20 MAX19995A toc47 10nH LO LEAKAGE AT IF PORT (dBm) MAX19995A toc46 55 RF-TO-IF ISOLATION vs. RF FREQUENCY (VARIOUS VALUES OF L3 AND L6) LO LEAKAGE AT IF PORT vs. LO FREQUENCY (VARIOUS VALUES OF L3 AND L6) RF-TO-IF ISOLATION (dB) CHANNEL ISOLATION vs. RF FREQUENCY (VARIOUS VALUES OF L3 AND L6) CHANNEL ISOLATION (dB) MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 2050 2150 2250 2350 LO FREQUENCY (MHz) 2450 2550 1700 1800 1900 2000 RF FREQUENCY (MHz) ______________________________________________________________________________________ 2100 2200 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 8 TC = +25°C 6 1900 PLO = -3dBm, 0dBm, +3dBm 2000 2100 1800 1900 RF FREQUENCY (MHz) 2100 6 1700 2200 MAX19995A toc52 21 20 23 VCC = 3.3V 21 20 2000 2100 2200 1800 1900 2000 2100 VCC = 3.3V TC = +25°C TC = -30°C 10 9 8 PLO = -3dBm, 0dBm, +3dBm 2000 RF FREQUENCY (MHz) 2100 2200 1900 2000 2100 MAX19995A toc51 2200 11 10 9 VCC = 3.0V, 3.3V, 3.6V 8 7 6 6 1900 1800 NOISE FIGURE vs. RF FREQUENCY 7 6 VCC = 3.3V 12 NOISE FIGURE (dB) 11 NOISE FIGURE (dB) 9 1800 1700 2200 NOISE FIGURE vs. RF FREQUENCY 10 1700 VCC = 3.0V RF FREQUENCY (MHz) 12 MAX19995A toc55 VCC = 3.3V 7 20 RF FREQUENCY (MHz) TC = +85°C 8 21 18 1700 NOISE FIGURE vs. RF FREQUENCY 11 22 19 RF FREQUENCY (MHz) 12 2200 PLO = 0dBm MAX19995A toc56 1900 2100 23 18 1800 2000 PRF = -5dBm/TONE VCC = 3.6V 19 18 1900 INPUT IP3 vs. RF FREQUENCY 22 PLO = -3dBm 19 1700 1800 24 INPUT IP3 (dBm) 22 VCC = 3.3V RF FREQUENCY (MHz) PRF = -5dBm/TONE PLO = +3dBm INPUT IP3 (dBm) INPUT IP3 (dBm) VCC = 3.3V 24 TC = -30°C NOISE FIGURE (dB) 2000 INPUT IP3 vs. RF FREQUENCY TC = +25°C PRF = -5dBm/TONE TC = +85°C 23 VCC = 3.0V RF FREQUENCY (MHz) INPUT IP3 vs. RF FREQUENCY 24 8 7 6 1700 2200 VCC = 3.6V 9 MAX19995A toc57 1800 8 7 TC = +85°C 1700 9 MAX19995A toc53 7 VCC = 3.3V CONVERSION GAIN (dB) 9 10 MAX19995A toc50 MAX19995A toc49 VCC = 3.3V CONVERSION GAIN (dB) CONVERSION GAIN (dB) TC = -30°C CONVERSION GAIN vs. RF FREQUENCY CONVERSION GAIN vs. RF FREQUENCY 10 MAX19995A toc54 CONVERSION GAIN vs. RF FREQUENCY 10 1700 1800 1900 2000 RF FREQUENCY (MHz) 2100 2200 1700 1800 1900 2000 2100 2200 RF FREQUENCY (MHz) ______________________________________________________________________________________ 13 MAX19995A Typical Operating Characteristics (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 1kΩ, VCC = 3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 1kΩ, VCC = 3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) 60 50 40 2100 2200 1800 RF FREQUENCY (MHz) 1800 2000 2100 60 50 1700 PLO = 0dBm 1800 2000 2100 10 TC = +25°C TC = -30°C 11 10 PLO = -3dBm 8 8 1900 2000 RF FREQUENCY (MHz) 2100 2200 1700 1800 1900 2000 RF FREQUENCY (MHz) 1900 2000 2100 2200 INPUT P1dB vs. RF FREQUENCY 9 1800 1800 VCC = 3.3V RF FREQUENCY (MHz) 12 VCC = 3.6V 11 10 VCC = 3.3V PLO = 0dBm, +3dBm 9 2200 60 50 1700 2200 VCC = 3.3V INPUT P1dB (dBm) 11 PRF = -5dBm VCC = 3.0V 12 MAX19995A toc64 VCC = 3.3V 2100 70 INPUT P1dB vs. RF FREQUENCY INPUT P1dB vs. RF FREQUENCY 14 1900 2000 VCC = 3.6V PLO = -3dBm 2200 1900 80 RF FREQUENCY (MHz) 12 1700 1800 3LO-3RF RESPONSE vs. RF FREQUENCY 70 RF FREQUENCY (MHz) TC = +85°C 1700 RF FREQUENCY (MHz) PRF = -5dBm VCC = 3.3V PLO = +3dBm TC = -30°C 1900 2200 3LO-3RF RESPONSE (dBc) 60 50 1700 2100 80 3LO-3RF RESPONSE (dBc) 3LO-3RF RESPONSE (dBc) MAX19995A toc61 PRF = -5dBm VCC = 3.3V 70 TC = +25°C 2000 3LO-3RF RESPONSE vs. RF FREQUENCY 3LO-3RF RESPONSE vs. RF FREQUENCY TC = +85°C 1900 RF FREQUENCY (MHz) 80 MAX19995A toc60 40 1700 INPUT P1dB (dBm) 2000 MAX19995A toc62 1900 MAX19995A toc65 1800 50 VCC = 3.0V, 3.3V, 3.6V 40 1700 60 PLO = -3dBm, 0dBm, +3dBm TC = +25°C TC = -30°C 70 MAX19995A toc63 50 70 PRF = -5dBm 2100 2200 MAX19995A toc66 60 PRF = -5dBm 80 2LO-2RF RESPONSE (dBc) TC = +85°C 70 VCC = 3.3V 2LO-2RF RESPONSE vs. RF FREQUENCY MAX19995A toc59 PRF = -5dBm VCC = 3.3V 80 2LO-2RF RESPONSE (dBc) 2LO-2RF RESPONSE (dBc) 2LO-2RF RESPONSE vs. RF FREQUENCY MAX19995A toc58 2LO-2RF RESPONSE vs. RF FREQUENCY 80 INPUT P1dB (dBm) MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 9 VCC = 3.0V 8 1700 1800 1900 2000 RF FREQUENCY (MHz) ______________________________________________________________________________________ 2100 2200 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch CHANNEL ISOLATION vs. RF FREQUENCY 1800 1900 2000 2100 1900 2000 2100 MAX19995A toc69 MAX19995A toc68 CHANNEL ISOLATION (dB) 40 1700 2200 1800 1900 2000 2100 LO LEAKAGE AT IF PORT vs. LO FREQUENCY TC = -30°C -45 TC = +25°C 2150 2250 2350 2450 -35 -40 PLO = -3dBm, 0dBm, +3dBm -45 -50 2050 2550 -30 VCC = 3.6V -35 -40 VCC = 3.0V -45 VCC = 3.3V -50 2150 2250 2350 2450 2050 2550 2150 2250 2350 2450 LO FREQUENCY (MHz) LO FREQUENCY (MHz) RF-TO-IF ISOLATION vs. RF FREQUENCY RF-TO-IF ISOLATION vs. RF FREQUENCY RF-TO-IF ISOLATION vs. RF FREQUENCY TC = +25°C 35 PLO = -3dBm, 0dBm, +3dBm 40 35 45 2550 MAX19995A toc75 VCC = 3.3V RF-TO-IF ISOLATION (dB) TC = +85°C 45 MAX19995A toc74 LO FREQUENCY (MHz) VCC = 3.3V 2200 MAX19995A toc72 VCC = 3.3V LO LEAKAGE AT IF PORT (dBm) -35 -30 MAX19995A toc71 LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT (dBm) LO LEAKAGE AT IF PORT (dBm) 1800 VCC = 3.0V, 3.3V, 3.6V 45 LO LEAKAGE AT IF PORT vs. LO FREQUENCY 45 RF-TO-IF ISOLATION (dB) PLO = -3dBm, 0dBm, +3dBm RF FREQUENCY (MHz) TC = +85°C 40 45 50 RF FREQUENCY (MHz) VCC = 3.3V -50 2050 50 40 1700 2200 CHANNEL ISOLATION vs. RF FREQUENCY 55 RF FREQUENCY (MHz) -30 -40 VCC = 3.3V RF-TO-IF ISOLATION (dB) 40 1700 TC = -30°C, +25°C, +85°C MAX19995A toc70 45 55 CHANNEL ISOLATION (dB) 50 MAX19995A toc73 CHANNEL ISOLATION (dB) VCC = 3.3V MAX19995A toc67 CHANNEL ISOLATION vs. RF FREQUENCY 55 VCC = 3.0V, 3.3V, 3.6V 40 35 TC = -30°C 30 30 1700 1800 1900 2000 RF FREQUENCY (MHz) 2100 2200 30 1700 1800 1900 2000 RF FREQUENCY (MHz) 2100 2200 1700 1800 1900 2000 2100 2200 RF FREQUENCY (MHz) ______________________________________________________________________________________ 15 MAX19995A Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 1kΩ, VCC = 3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) Typical Operating Characteristics (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 1kΩ, VCC = 3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) LO LEAKAGE AT RF PORT vs. LO FREQUENCY -60 -60 1950 2150 2350 2550 2350 2550 2750 1750 MAX19995A toc78 2350 2550 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY TC = +85°C TC = +25°C -40 VCC = 3.3V PLO = +3dBm -20 -30 PLO = -3dBm -40 PLO = 0dBm -10 2LO LEAKAGE AT RF PORT (dBm) -30 -10 MAX19995A toc80 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY TC = -30°C 1950 2150 2350 2550 1750 2750 VCC = 3.6V -20 -30 VCC = 3.3V -40 VCC = 3.0V 1950 2150 2350 2550 1750 2750 1950 2150 2350 2550 LO FREQUENCY (MHz) LO FREQUENCY (MHz) LO SWITCH ISOLATION vs. LO FREQUENCY LO SWITCH ISOLATION vs. LO FREQUENCY LO SWITCH ISOLATION vs. LO FREQUENCY 50 TC = +85°C TC = +25°C VCC = 3.3V 50 40 PLO = -3dBm, 0dBm, +3dBm 30 30 1950 2150 2350 LO FREQUENCY (MHz) 2550 2750 60 LO SWITCH ISOLATION (dB) TC = -30°C 60 LO SWITCH ISOLATION (dB) VCC = 3.3V MAX19995A toc82 LO FREQUENCY (MHz) 60 2750 -50 -50 -50 1750 2150 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY -20 40 1950 LO FREQUENCY (MHz) 2LO LEAKAGE AT RF PORT (dBm) 2LO LEAKAGE AT RF PORT (dBm) 2150 LO FREQUENCY (MHz) VCC = 3.3V 16 1950 LO FREQUENCY (MHz) -10 1750 VCC = 3.3V VCC = 3.0V -50 -60 1750 2750 MAX19995A toc79 1750 -40 MAX19995A toc81 TC = +85°C PLO = -3dBm, 0dBm, +3dBm -50 VCC = 3.6V 2750 MAX19995A toc84 -50 -40 -30 LO LEAKAGE AT RF PORT (dBm) TC = +25°C VCC = 3.3V MAX19995A toc83 LO LEAKAGE AT RF PORT (dBm) -40 -30 LO LEAKAGE AT RF PORT vs. LO FREQUENCY MAX19995A toc77 VCC = 3.3V TC = -30°C LO LEAKAGE AT RF PORT (dBm) -30 MAX19995A toc76 LO LEAKAGE AT RF PORT vs. LO FREQUENCY LO SWITCH ISOLATION (dB) MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 50 40 VCC = 3.0V, 3.3V, 3.6V 30 1750 1950 2150 2350 LO FREQUENCY (MHz) 2550 2750 1750 1950 2150 2350 LO FREQUENCY (MHz) ______________________________________________________________________________________ 2550 2750 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch IF PORT RETURN LOSS vs. IF FREQUENCY 15 PLO = -3dBm, 0dBm, +3dBm 20 L = 120nH 10 15 L = 330nH 25 0 VCC = 3.3V 5 MAX19995A toc87 5 fLO = 2300MHz VCC = 3.3V LO SELECTED RETURN LOSS (dB) 10 L = L1, L2, L4, L5 MAX19995A toc86 5 LO SELECTED RETURN LOSS vs. LO FREQUENCY 0 IF PORT RETURN LOSS (dB) fIF = 350MHz VCC = 3.3V 10 PLO = -3dBm, 0dBm, +3dBm 15 20 25 L = 470nH 20 30 2000 2100 30 50 2200 140 230 320 410 500 1750 1950 IF FREQUENCY (MHz) RF FREQUENCY (MHz) LO UNSELECTED RETURN LOSS vs. LO FREQUENCY 0 VCC = 3.3V 5 2150 2350 2550 2750 LO FREQUENCY (MHz) SUPPLY CURRENT vs. TEMPERATURE (TC) 280 10 15 20 PLO = -3dBm, 0dBm, +3dBm VCC = 3.6V 260 240 220 VCC = 3.3V VCC = 3.0V 200 25 30 MAX19995A toc89 1900 SUPPLY CURRENT (mA) 1800 MAX19995A toc88 1700 LO UNSELECTED RETURN LOSS (dB) RF PORT RETURN LOSS (dB) 0 MAX19995A toc85 RF PORT RETURN LOSS vs. RF FREQUENCY 180 1750 1950 2150 2350 LO FREQUENCY (MHz) 2550 2750 -35 -15 5 25 45 65 85 TEMPERATURE (°C) ______________________________________________________________________________________ 17 MAX19995A Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 1kΩ, VCC = 3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 1850MHz, fLO = 2200MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch Pin Description PIN NAME 1 RFMAIN FUNCTION Main Channel RF input. Internally matched to 50Ω. Requires an input DC-blocking capacitor. Main Channel Balun Center Tap. Bypass to GND with 39pF and 0.033µF capacitors as close as possible to the pin with the smaller value capacitor closer to the part. 2 TAPMAIN 3, 5, 7, 12, 20, 22, 24, 25, 26, 34 GND Ground 4, 6, 10, 16, 21, 30, 36 VCC Power Supply. Bypass to GND with capacitors as shown in the Typical Application Circuit as close as possible to the pin. 8 TAPDIV 9 RFDIV 11 IFD_SET 13, 14 IFD+, IFD- Diversity Mixer Differential IF Output. Connect pullup inductors from each of these pins to VCC (see the Typical Application Circuit). 15 IND_EXTD Diversity External Inductor Connection. Connect this pin to ground. For improved RF-to-IF and LO-toIF isolation, connect a low-ESR 10nH inductor from this pin to ground (see the Typical Operating Characteristics for typical performance vs. inductor value). 17 LO_ADJ_D LO Diversity Amplifier Bias Control. Connect a resistor from this pin to ground to set the bias current for the diversity LO amplifier (see the Typical Operating Characteristics for typical performance vs. resistor value). 18, 28 N.C. No Connection. Not internally connected. 19 LO1 Local Oscillator 1 Input. This input is internally matched to 50Ω. Requires an input DC-blocking capacitor. 23 LOSEL 27 LO2 29 LO_ADJ_M LO Main Amplifier Bias Control. Connect a resistor from this pin to ground to set the bias current for the main LO amplifier (see the Typical Operating Characteristics for typical performance vs. resistor value). 31 IND_EXTM Main External Inductor Connection. Connect this pin to ground. For improved RF-to-IF and LO-to-IF isolation, connect a low-ESR 10nH inductor from this pin to ground (see the Typical Operating Characteristics for typical performance vs. inductor value). 32, 33 IFM-, IFM+ Main Mixer Differential IF Output. Connect pullup inductors from each of these pins to VCC (see the Typical Application Circuit). 35 IFM_SET IF Main Amplifier Bias Control. Connect a resistor from this pin to ground to set the bias current for the main IF amplifier (see the Typical Operating Characteristics for typical performance vs. resistor value). — EP 18 Diversity Channel Balun Center Tap. Bypass to GND with 39pF and 0.033µF capacitors as close as possible to the pin with the smaller value capacitor closer to the part. Diversity Channel RF input. Internally matched to 50Ω. Requires an input DC-blocking capacitor. IF Diversity Amplifier Bias Control. Connect a resistor from this pin to ground to set the bias current for the diversity IF amplifier (see the Typical Operating Characteristics for typical performance vs. resistor value). Local Oscillator Select. Set this pin to high to select LO1. Set to low to select LO2. Local Oscillator 2 Input. This input is internally matched to 50Ω. Requires an input DC-blocking capacitor. 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. ______________________________________________________________________________________ Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch The MAX19995A is a dual-channel downconverter designed to provide up to 8.7dB of conversion gain, +24.8dBm input IP3, +13.5dBm 1dB input compression point, and a noise figure as low as 9.2dB. In addition to its high-linearity performance, the MAX19995A achieves a high level of component integration. The device integrates two double-balanced mixers for two-channel downconversion. Both the main and diversity channels include a balun and matching circuitry to allow 50Ω single-ended interfaces to the RF ports and the two LO ports. An integrated singlepole/double-throw (SPDT) switch provides 50ns switching time between the two LO inputs, with 48dB of LO-to-LO isolation and -35dBm of LO leakage at the RF port. Furthermore, the integrated LO buffers provide a high drive level to each mixer core, reducing the LO drive required at the MAX19995A’s inputs to a range of -3dBm to +3dBm. The IF ports for both channels incorporate differential outputs for downconversion, which are ideal for providing enhanced 2LO-2RF performance. Specifications are guaranteed over broad frequency ranges to allow for use in UMTS/WCDMA, LTE/WiMAX, DCS1800/PCS1900 GSM/EDGE, TD-SCDMA, and cdma2000 base stations. The MAX19995A is specified to operate over an RF input range of 1700MHz to 2200MHz, an LO range of 1750MHz to 2700MHz, and an IF range of 50MHz to 500MHz. The external IF components set the lower frequency range (see the Typical Operating Characteristics for details). Operation beyond these ranges is possible; see the Typical Operating Characteristics for additional information. Although this device is optimized for high-side LO injection applications, it can operate in low-side LO injection modes as well. However, performance degrades as fLO continues to decrease. For increased low-side LO performance, refer to the MAX19995 data sheet. RF Port and Balun The RF input ports of both the main and diversity channels are internally matched to 50Ω, requiring no external matching components. A DC-blocking capacitor is required as the input is internally DC shorted to ground through the on-chip balun. The RF port input return loss is typically better than 16.5dB over the RF frequency range of 1700MHz to 2200MHz. LO Inputs, Buffer, and Balun The MAX19995A is optimized for a 1750MHz to 2700MHz LO frequency range. As an added feature, the MAX19995A includes an internal LO SPDT switch for use in frequency-hopping applications. The switch selects one of the two single-ended LO ports, allowing the external oscillator to settle on a particular frequency before it is switched in. LO switching time is typically 50ns, which is more than adequate for typical GSM applications. If frequency hopping is not employed, simply set the switch to either of the LO inputs. The switch is controlled by a digital input (LOSEL), where logic-high selects LO1 and logic-low selects LO2. LO1 and LO2 inputs are internally matched to 50Ω, requiring only 39pF DC-blocking capacitors. If LOSEL is connected directly to a logic source, then voltage MUST be applied to VCC before digital logic is applied to LOSEL to avoid damaging the part. Alternatively, a 1kΩ resistor can be placed in series at the LOSEL to limit the input current in applications where LOSEL is applied before VCC. The main and diversity channels incorporate a twostage LO buffer that allows for a wide-input power range for the LO drive. The on-chip low-loss baluns, along with LO buffers, drive the double-balanced mixers. All interfacing and matching components from the LO inputs to the IF outputs are integrated on-chip. High-Linearity Mixer The core of the MAX19995A dual-channel downconverter consists of two double-balanced, high-performance passive mixers. Exceptional linearity is provided by the large LO swing from the on-chip LO buffers. When combined with the integrated IF amplifiers, the cascaded IIP3, 2LO-2RF rejection, and noise-figure performance are typically +24.8dBm, 64dBc, and 9.2dB, respectively. Differential IF The MAX19995A has an IF frequency range of 50MHz to 500MHz, where the low-end frequency depends on the frequency response of the external IF components. Note that these differential ports are ideal for providing enhanced IIP2 performance. Single-ended IF applications require a 4:1 (impedance ratio) balun to transform the 200Ω differential IF impedance to a 50Ω singleended system. After the balun, the return loss is typically 11.5dB. The user can use a differential IF amplifier on the mixer IF ports, but a DC block is required on both IFD+/IFD- and IFM+/IFM- ports to keep external DC from entering the IF ports of the mixer. ______________________________________________________________________________________ 19 MAX19995A Detailed Description MAX19995A Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch Applications Information Input and Output Matching The RF and LO inputs are internally matched to 50Ω. No matching components are required. The RF port input return loss is typically better than 16.5dB over the RF frequency range of 1700MHz to 2200MHz and return loss at the LO ports is typically better than 15dB over the entire LO range. RF and LO inputs require only DC-blocking capacitors for interfacing. The IF output impedance is 200Ω (differential). For evaluation, an external low-loss 4:1 (impedance ratio) balun transforms this impedance to a 50Ω single-ended output (see the Typical Application Circuit). Reduced-Power Mode Each channel of the MAX19995A has two pins (LO_ADJ_, IF_SET) that allow external resistors to set the internal bias currents. Nominal values for these resistors are given in Table 1. Larger value resistors can be used to reduce power dissipation at the expense of some performance loss. If ±1% resistors are not readily available, substitute with ±5% resistors. Significant reductions in power consumption can also be realized by operating the mixer with an optional supply voltage of 3.3V. Doing so reduces the overall power consumption by up to 54%. See the 3.3V Supply AC Electrical Characteristics table and the relevant 3.3V curves in the Typical Operating Characteristics section. IND_EXT_ Inductors For applications requiring optimum RF-to-IF and LO-toIF isolation, connect low-ESR inductors from IND_EXT_ (pins 15 and 31) to ground. When improved isolation is not required, connect IND_EXT_ to ground using 0Ω resistance. See the Typical Operating Characteristics to evaluate the isolation vs. inductor value tradeoff. 20 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 so that any capacitance from both IF- and IF+ to ground does not exceed several picofarads. 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 MAX19995A 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 and TAPMAIN/TAPDIV with the capacitors shown in the Typical Application Circuit (see Table 1 for component values). Place the TAPMAIN/TAPDIV bypass capacitors to ground within 100 mils of the pin. Exposed Pad RF/Thermal Considerations The exposed pad (EP) of the MAX19995A’s 36-pin thin QFN-EP package provides a low thermal-resistance path to the die. It is important that the PCB on which the MAX19995A 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. ______________________________________________________________________________________ Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch DESIGNATION QTY DESCRIPTION COMPONENT SUPPLIER C1, C2, C7, C8, C14, C16 6 39pF microwave capacitors (0402) Murata Electronics North America, Inc. C3, C6 2 0.033µF microwave capacitors (0603) Murata Electronics North America, Inc. C4, C5 2 Not used — C9, C13, C15, C17, C18 5 0.01µF microwave capacitors (0402) Murata Electronics North America, Inc. C10, C11, C12, C19, C20, C21 6 150pF microwave capacitors (0603) Murata Electronics North America, Inc. L1, L2, L4, L5 4 120nH wire-wound high-Q inductors (0805) Coilcraft, Inc. L3, L6 2 10nH wire-wound high-Q inductors (0603). Smaller values can be used at the expense of some performance loss (see the Typical Operating Characteristics). Coilcraft, Inc. R1, R4 2 681Ω ±1% resistors (0402). Used for VCC = 5.0V applications. Larger values can be used to reduce power at the expense of some performance loss (see the Typical Operating Characteristics). Digi-Key Corp. 909Ω ±1% resistors (0402). Used for VCC = 3.3V applications. R2, R5 2 1.5kΩ ±1% resistors (0402). Used for VCC = 5.0V applications. Larger values can be used to reduce power at the expense of some performance loss (see the Typical Operating Characteristics). Digi-Key Corp. 1kΩ ±1% resistors (0402). Used for VCC = 3.3V applications. R3, R6 2 0Ω resistors (1206) T1, T2 2 4:1 transformers (200:50) TC4-1W-17 Digi-Key Corp. Mini-Circuits U1 1 MAX19995A IC (36 TQFN-EP) Maxim Integrated Products, Inc. ______________________________________________________________________________________ 21 MAX19995A Table 1. Component Values Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch MAX19995A Typical Application Circuit C19 T1 L1 VCC IF MAIN OUTPUT C21 R3 L2 4:1 R1 C20 VCC RFMAIN RF MAIN INPUT TAPMAIN C3 C2 GND VCC VCC C4 GND VCC VCC C5 GND C6 C7 TAPDIV RFDIV RF DIV INPUT C17 28 N.C. LO_ADJ_M R2 29 30 VCC IND_EXTM 31 IFM32 IFM+ 33 GND 34 IFM_SET 35 + 36 VCC C18 C1 VCC L3 C16 1 27 MAX19995A 2 26 3 25 4 24 5 23 6 22 7 21 EXPOSED PAD 8 20 9 19 LO2 LO2 GND GND GND LOSEL LO SELECT GND VCC VCC C15 GND LO1 LO1 C14 18 N.C. 17 LO_ADJ_D VCC 16 15 14 IFD- 13 IFD+ 12 GND 11 R4 IND_EXTD C9 IFD_SET VCC VCC 10 C8 R5 VCC C13 L6 C11 T2 L5 VCC C12 R6 IF DIV OUTPUT L4 4:1 C10 22 ______________________________________________________________________________________ Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 28 N.C. 29 LO_ADJ_M 30 VCC 31 IND_EXTM 32 IFM- 33 IFM+ 34 GND 35 IFM_SET 36 VCC TOP VIEW + RFMAIN 1 MAX19995A 27 LO2 26 GND TAPMAIN 2 GND 3 25 GND VCC 4 24 GND GND 5 23 LOSEL VCC 6 22 GND GND 7 21 VCC 20 GND 19 LO1 16 17 18 VCC LO_ADJ_D N.C. 14 IFD- 15 13 IFD+ IND_EXTD 12 GND 11 9 IFD_SET RFDIV 10 8 VCC TAPDIV EXPOSED PAD THIN QFN (EXPOSED PAD) 6mm x 6mm EXPOSED PAD ON THE BOTTOM OF THE PACKAGE Chip Information PROCESS: SiGe BiCMOS Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 36 Thin QFN-EP T3666+2 21-0141 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23 © 2009 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. MAX19995A Pin Configuration/Functional Block Diagram