HMC977

Data Sheet FEATURES Conversion gain: 14 dB typical Image rejection: 21 dBc typical at 20 GHz to 26.5 GHz 2× LO to RF isolation: 45 dB typical at 20 GHz to 26.5 GHz Noise figure: 2.5 dB typical at 20 GHz to 26.5 GHz Input IP3: 1 dBm typical at 20 GHz to 26.5 GHz LO drive range: 2 dBm to 6 dBm 24-lead 4 mm × 4 mm LFCSP APPLICATIONS Point to point and point to multipoint radios Military radar, electronic warfare (EW), and electronic intelligence (ELINT) Satellite communications GaAs, MMIC, I/Q, Downconverter, 20 GHz to 28 GHz HMC977 FUNCTIONAL BLOCK DIAGRAM HMC977 24 GND 23 RF 22 NIC 21 NIC 20 NIC 19 NIC NIC 1 NIC 2 VDRF 3 VDLO2 4 VDLO1 5 ×2 NIC 6 18 NIC 17 GND 16 IF2 15 NIC 14 IF1 13 GND NIC 7 LO 8 GND 9 NIC 10 NIC 11 NIC 12 21858-001 GENERAL DESCRIPTION The HMC977 is a compact, gallium arsenide (GaAs), monolithic microwave integrated circuit (MMIC), inphase and quadrature (I/Q) downconverter in a leadless, RoHS compliant, surface-mount technology (SMT) package. This device provides a small signal conversion gain of 14 dB with a noise figure of 2.5 dB and 21 dBc of image rejection. The HMC977 utilizes a low noise amplifier (LNA) followed by an image reject mixer which is driven by an active 2× multiplier. The image reject Figure 1. mixer eliminates the need for a filter following the LNA and removes thermal noise at the image frequency. I and Q mixer outputs are provided and an external 90° hybrid is required to select the required sideband. The HMC977 is a much sm...