HMC555
v02.0907
GaAs MMIC I/Q MIXER
31 - 38 GHz
Typical Applications
Features
The HMC555 is ideal for:
• Microwave Radio
Wide IF Bandwidth: DC - 3.5 GHz
High Image Rejection: 17 dB
• Satellite Communication Systems
• Military End Use
High LO to RF Isolation: 50 dB
High Input IP3: +21 dBm
3
• Test Equipment & Sensors
Passive Topology: No DC Bias Required
Compact Size: 1.49 x 1.15 x 0.1mm
Functional Diagram
General Description
The HMC555 is a compact I/Q MMIC mixer which
can be used as either an Image Reject Mixer or a
Single Sideband Upconverter. The chip utilizes two
double balanced mixer cells and a 90 degree hybrid
fabricated in a GaAs MESFET process. All data shown
below is taken with the chip mounted in a 50 Ohm
test fixture and includes the effects of 1 mil diameter
x 12 mil length bond wires on each port. A low
frequency quadrature hybrid was used to produce
a 100 MHz USB IF output. This compact mixer is a
much more compact alternative to hybrid style Image
Reject Mixers and Single Sideband Upconverter
assemblies, and is ideal for microwave radio
applications. The redundant IF port connections
located on opposing sides of the HMC555 chip,
provide added layout flexibility.
Electrical Specifications, TA = +25° C, IF= 100 MHz, LO = +17 dBm*
Parameter
Frequency Range, RF/LO
Min.
Typ.
31 - 34
DC - 3.5
11
Max.
Min.
Typ.
34 - 38
DC - 3.5
10.5
17
Max.
12.5
Units
GHz
GHz
dB
Frequency Range, IF
Conversion Loss (As IRM)
Image Rejection
13
11
15
11
dB
1 dB Compression (Input)
LO to RF Isolation
LO to IF Isolation
17
16.5
40
dBm
dB
37
13
50
35
12
20
16
dB
IP3 (Input)
19
21
dBm
dB
Amplitude Balance
Phase Balance
0.5
1
16
12
deg
* Unless otherwise noted, all measurements performed as downconverter.
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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