CMD18C3 2-32 GHz Fundamental Mixer Features Functional Block Diagram Low conversion loss High isolation Wide IF bandwidth Passive double balanced topology Pb-free RoHs compliant 3x3 mm SMT package Description The CMD18C3 is a general purpose double balanced mixer in a leadless surface mount package that can be used for up- and downconverting applications between 2 and 32 GHz. The CMD18C3 has very high isolation to both the RF and IF ports due to the optimized balun structures, and can operate with an LO drive level as low as +9 dbm. The CMD18C3 can easily be configured as an image reject mixer or single sideband modulator with external hybrids and power splitters. Electrical Performance - IF = 1 MHz, LO = +13 dbm, T A = 25 o C, F = 26 GHz Parameter Min Typ Max Units Frequency Range, RF & LO 2-32 GHz Frequency Range, IF DC 1 GHz Conversion Loss 7 db LO to RF Isolation 36 db LO to IF Isolation 36 db RF to IF Isolation 26 db Input P1dB 1 dbm Unless otherwise noted, all measurements performed as a downconverter, IF = 1 MHz
CMD18C3 2-32 GHz Fundamental Mixer Specifications Absolute Maximum Ratings Parameter RF / IF Input Power LO Drive Rating +25 dbm +25 dbm Operating Temperature -4 to 85 C Storage Temperature -55 to 15 C Operation of this device outside the maximum ratings may cause permanent damage. Electrical Specifications - IF = 1 MHz, LO = +13 dbm, T A = 25 o C Parameter Min Typ Max Min Typ Max Units Frequency Range, RF & LO 22-28 2-32 GHz Frequency Range, IF DC 1 DC 1 GHz Conversion Loss 7 9 7 11 db Noise Figure (SSB) 7 9 7 11 db LO to RF Isolation 31 36 27 36 db LO to IF Isolation 3 38 27 38 db RF to IF Isolation 19 26 16 26 db Input P1dB 1 9 dbm Input IP3 18 18 dbm Unless otherwise noted, all measurements performed as a downconverter, IF = 1 MHz
CMD18C3 2-32 GHz Fundamental Mixer Typical Performance Conversion Gain vs. Temperature, LO = +13 dbm, IF = 1 MHz USB -2-4 +25C +85C -4C Conversion Gain/dB -6-8 -1-12 -14-16 -18-2 18 19 2 21 22 23 24 25 26 27 28 29 3 31 32 33 34 Isolation, LO = +13 dbm -5-1 -15 RF/IF Isolation LO/IF Isolation LO/RF Isolation -2 Isolations/dB -25-3 -35-4 -45-5 -55-6 18 19 2 21 22 23 24 25 26 27 28 29 3 31 32 33 34
CMD18C3 2-32 GHz Fundamental Mixer Typical Performance Conversion Gain vs. LO Drive, IF = 1 MHz USB -2-4 +9 dbm +11 dbm +13 dbm +15 dbm -6 Conversion Gain/dB -8-1 -12-14 -16-18 -2 18 19 2 21 22 23 24 25 26 27 28 29 3 31 32 33 34 Return Loss, LO = + 13 dbm RF LO -5 Return Loss/dB -1-15 -2-25 18 19 2 21 22 23 24 25 26 27 28 29 3 31 32 33 34
CMD18C3 2-32 GHz Fundamental Mixer Typical Performance IF Bandwidth, LO = +13 dbm -2-4 Conversion Gain IF Return Loss -6 Response/dB -8-1 -12-14 -16-18 -2 1 2 3 4 5 6 7 8 9 1 Upconverter Performance, Conversion Gain vs. LO Drive, IF input = 1 MHz -2-4 +9 dbm +11 dbm +13 dbm +15 dbm -6 Conversion Gain/dB -8-1 -12-14 -16-18 -2 18 19 2 21 22 23 24 25 26 27 28 29 3 31 32 33 34
CMD18C3 2-32 GHz Fundamental Mixer Typical Performance Input IP3 vs. Temperature, LO = +15 dbm, IF = 1 MHz 26 24 22 2 18 Input IP3/dBm 16 14 12 1 +25C +85C -4C 8 6 4 2 2 21 22 23 24 25 26 27 28 29 3 31 32 Input IP3 vs. LO Drive, IF = 1 MHz 26 24 22 2 18 Input IP3/dBm 16 14 12 1 8 6 +13 dbm +15 dbm +17 dbm 4 2 2 21 22 23 24 25 26 27 28 29 3 31 32
CMD18C3 2-32 GHz Fundamental Mixer Typical Performance Upconverter Performance, Input IP3 vs. LO Drive, IF = 1 MHz 2 18 16 +13 dbm +15 dbm +17 dbm 14 Input IP3/dBm 12 1 8 6 4 2 2 21 22 23 24 25 26 27 28 29 3 31 32 Input P1dB, LO = +13 dbm, IF = 1 MHz USB Input P1dB/dBm 15 14 13 12 11 1 9 8 7 6 5 4 3 2 1 2 21 22 23 24 25 26 27 28 29 3 31 32
CMD18C3 2-32 GHz Fundamental Mixer Mechanical Information Package Information and Dimensions Recommended PCB Land Pattern Design Services recommends that the user develop the land pattern that will provide the best design for proper solder reflow and device attach for their specific application. Please review Application Note AN 15 for a recommended land pattern approach. Recommended Solder Reflow Profile Design Services recommends screen printing with belt furnace reflow to ensure proper solder reflow and device attach. Please review Application Note AN 12 for a recommended solder reflow profile.
CMD18C3 2-32 GHz Fundamental Mixer Pin Description Pin Diagram Functional Description Pin Function Description Schematic 1,3,4,6,7,9 and die paddle Ground Connect to RF / DC ground. GND 2 LO This pin is DC coupled and matched to 5 ohms. LO 5 IF This pin is DC coupled. For applications not requiring operation to DC, this port should be DC blocked externally using a series capacitor whose value has been chosen to pass the necessary IF frequency range. For operation to DC, this pin must not source or sink more than 16 ma of current or part non-function or part failure may result. IF 8 RF This pin is DC coupled and matched to 5 ohms. RF 1-12 N/C No connection required. These pins may be connected to RF/DC ground
CMD18C3 2-32 GHz Fundamental Mixer Applications Information Evaluation Board The circuit board shown has been developed for optimized assembly at. A sufficient number of via holes should be used to connect the top and bottom ground planes. As surface mount processes vary, careful process development is recommended. Bill of Material Designator Value Description J1 - J3 U1 PCB SMA End Launch Connector CMD18C3 Fundamental Mixer 1435 Evaluation PCB GaAs MMIC devices are susceptible to damage from Electrostatic Discharge. Proper precautions should be observed during handling, assembly and test.