v02.1103
MICROWAVE CORPORATION
HMC256
GaAs MMIC I/Q MIXER
5.9 - 12 GHz
Pad Descriptions
Pad Number
Function
Description
Interface Schematic
1
RF
This pin is AC coupled and matched to 50 Ohm.
2
LO
This pin is AC coupled and matched to 50 Ohm.
5
3,4
IF1, IF2
This pin is DC coupled. For operation to DC pin must not
sink/source more than 2 mA of current or failure may result.
MIXERS - CHIP
Backside
GND
The backside of the die must connect to RF ground.
Image Reject Mixer Suggested Application Circuit
Below in
Figure 1
is a photo and in
Figure 2
a schematic of the HMC256 image reject mixer MMIC die connected to a quadrature
hybrid (120 MHz) manufactured by Merrimac Industries West Caldwell, NJ (P/N QHZ-2A-120).
Data presented for the HMC256 MMIC IRM was obtained using the circuit described here. Please note that the image rejection
and isolation performance is dependent on the selection of the low frequency hybrid. The performance specification of the low
frequency quadrature hybrid as well as the phase balance and VSWR of the interface circuit to the HMC256 MMIC will effect the
overall IRM performance.
Figure 1:
Complete MIC IRM Assembly
Figure 2:
Schematic of HMC256 IRM MMIC Connected to the Quadrature Hybrid
5 - 36
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
HITTITE [ HITTITE MICROWAVE CORPORATION ]
