HMC256
v02.1103
MICROWAVE CORPORATION
GaAs MMIC I/Q MIXER
5.9 - 12 GHz
Typical Applications
Features
High Image Rejection: >30 dB
Input IP3: +18 dB
The HMC256 is ideal for:
• Microwave Radio & VSAT
• Test Instrumentation
• Military Radios Radar & ECM
• Space
Wideband IF: DC to 1.5 GHz
Small Size: 1.3 mm x 1.6 mm
General Description
Functional Diagram
The HMC256 chip is a compact, 2.08 mm2, I/Q
Mixer MMIC which can be used as an Image
Reject Mixer (IRM) or SSB upconverter. The
chip utilizes two standard Hittite double-balanced
mixer cells and a Lange Coupler realized in GaAs
MESFET technology. All data is with the chip in
a 50 Ohm test fixture connected via 0.025 mm (1
mil) diameter wire bonds of minimal length <0.51
mm (<20 mils). A low frequency quadrature hybrid
was used to interface the MMIC IF ports to a 120
MHz IF USB output. This provides an example of
the I/Q Mixer in an IRM application. The IF may
be used from DC to 1.5 GHz. This I/Q Mixer is
a more reliable, much smaller replacement to
hybrid drop-in style I/Q Mixer assemblies.
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Electrical Specifications,TA = +25° C, As an Image Reject Mixer
IF = 70 - 200 MHz
LO = +18 dBm
IF = 70 - 200 MHz
LO = +15 dBm
Parameter
Units
Min.
Typ.
Max.
Min.
Typ.
Max.
Frequency Range, RF
5.9 - 12
7.1 - 11.7
GHz
GHz
GHz
dB
Frequency Range, LO
Frequency Range, IF
Conversion Loss
5.7 - 12
6.9 - 11.7
DC - 1.5
DC - 1.5
8
10.5
10.5
8
10.5
10.5
Noise Figure (SSB)
Image Rejection (IR)
LO to RF Isolation
LO to IF Isolation
8
8
dB
24
22
27
24
32
30
35
30
18
5
20
22
27
24
30
30
35
30
17
5
dB
dB
dB
RF to IF Isolation
dB
IP3 (Input)
dBm
dBm
1 dB Gain Compression (Input)
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
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