HMC256
v03.1007
GaAs MMIC I/Q MIXER
5.9 - 12 GHz
Typical Applications
Features
High Image Rejection: >30 dB
The HMC256 is ideal for:
• Microwave Radio & VSAT
• Test Instrumentation
• Military Radios Radar & ECM
• Space
Input IP3: +18 dB
Wideband IF: DC to 1.5 GHz
Die Size: 1.6 x 1.3 x 0.1 mm
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Functional Diagram
General Description
The HMC256 chip is a compact, 2.08 mm2, I/Q Mixer
MMIC which can be used as an Image Reject Mixer
(IRM) or Single Sideband (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.
Electrical Specifications, TA = +25° C, As an IRM
IF = 70 - 200 MHz
IF = 70 - 200 MHz
LO = +18 dBm
LO = +15 dBm
Parameter
Units
Min.
Typ.
Max.
Min.
Typ.
Max.
Frequency Range, RF
Frequency Range, LO
5.9 - 12
7.1 - 11.7
GHz
GHz
5.7 - 12
6.9 - 11.7
Frequency Range, IF
Conversion Loss
DC - 1.5
DC - 1.5
GHz
dB
8
10.5
10.5
8
8
10.5
10.5
Noise Figure (SSB)
Image Rejection (IR)
LO to RF Isolation
LO to IF Isolation
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:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
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