9 GHz to 12 GHz, GaAs, MMIC, I/Q Downconverter Data Sheet HMC908A FEATURES FUNCTIONAL BLOCK DIAGRAM Conversion gain: 11 dB (typical) at IF = 100 MHz OUT 32 31 30 29 28 27 26 25 Image rejection: 25 dB (typical) at IF = 100 MHz OUT LO to RF isolation: 46 dB (typical) NIC 1 24 NIC 23 LO to IF isolation: 26 dB (typical) GND 2 90 NIC 3 22 NIC RF IF output frequency: dc to 3.5 GHz GND 4 21 GND 32-lead, 4.9 mm 4.9 mm ceramic leadless chip carrier 0 5 20 NIC IF1 VD3 6 19 GND APPLICATIONS NIC 7 18 IF2 8 17 Point to point radios NIC GND HMC908A Point to multipoint radios and very small aperture terminals PACKAGE 9 10 11 12 13 14 15 16 BASE (VSATs) GND Test equipment and sensors Figure 1. Military end use GENERAL DESCRIPTION The HMC908A is a compact, gallium arsenide (GaAs), image rejection mixer eliminates the need for a filter following monolithic microwave integrated circuit (MMIC), inphase/ the LNA, and removes thermal noise at the image frequency. quadrature (I/Q) downconverter in a leadless, RoHS compliant I and Q mixer outputs are provided and an external 90 hybrid ceramic leadless chip carrier. This device provides a small signal is needed to select the required sideband. The HMC908A is a conversion gain of 11 dB with a noise figure of 2 dB and 25 dB much smaller alternative to hybrid style image rejection mixer of image rejection at 100 MHz. The HMC908A utilizes a low downconverter assemblies, and it eliminates the need for wire noise amplifier (LNA) followed by an image rejection mixer bonding by allowing the use of surface-mount manufacturing that is driven by a local oscillator (LO) buffer amplifier. The techniques. 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NIC NIC GND NIC LO NIC VD1 GND NIC VD2 NIC NIC NIC NIC NIC NIC 20070-001HMC908A Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Downconverter Performance: IFOUT = 3500 MHz, Lower Sideband (High-Side LO) .......................................................... 11 Applications ....................................................................................... 1 Downconverter Performance: IF Bandwidth, Upper Sideband Functional Block Diagram .............................................................. 1 (Low-Side LO) ............................................................................ 13 General Description ......................................................................... 1 Downconverter Performance: IF Bandwidth, Lower Sideband Revision History ............................................................................... 2 (High-Side LO) ........................................................................... 16 Specifications ..................................................................................... 3 Amplitude/Phase Balance, Downconverter ............................ 19 Absolute Maximum Ratings ............................................................ 4 Isolation and Return Loss ......................................................... 20 Solder Profile ................................................................................. 4 Spurious Output Performance .................................................. 21 Thermal Resistance ...................................................................... 4 Theory of Operation ...................................................................... 22 ESD Caution .................................................................................. 4 LO Driver Amplifier .................................................................. 22 Pin Configuration and Function Descriptions ............................. 5 Mixer ............................................................................................ 22 Interface Schematics..................................................................... 5 LNA .............................................................................................. 22 Typical Performance Characteristics ............................................. 6 Applications Information .............................................................. 23 Downconverter Performance: IF = 100 MHz, Upper OUT Layout .......................................................................................... 23 Sideband (Low-Side LO) ............................................................. 6 Performance at Lower IF Frequencies ..................................... 25 Downconverter Performance: IFOUT = 100 MHz, Lower Outline Dimensions ....................................................................... 26 Sideband (High-Side LO) ............................................................ 8 Ordering Guide .......................................................................... 26 Downconverter Performance: IFOUT = 3500 MHz, Upper Sideband (Low-Side LO) ............................................................. 9 REVISION HISTORY 4/2019Revision 0: Initial Version Rev. 0 Page 2 of 26