9 GHz to 10 GHz,
X-Band, GaAs, MMIC, Low Noise Converter
Data Sheet
Rev. 0 Document Feedback
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FEATURES
Conversion gain: 13 dB typical
Image rejection: 20 dBc typical
Noise figure: 2 dB typical
Input power for 1 dB compression: −4 dBm typical
Input third-order intercept: 6 dBm typical
Output saturated power: 10 dBm typical
LO leakage at the IF port: −20 dBm typical
LO leakage at the RF port: −37 dBm typical
32-terminal, 5 mm × 5 mm, ceramic leadless chip carrier (LCC)
APPLICATIONS
Point to point and point to multipoint radios
Military radar
Satellite communications
FUNCTIONAL BLOCK DIAGRAM
17
1
3
4
2
9
NIC
NIC
LNA_VG1
NIC
5
6
RFIN
NIC
7VCTRL
8NIC NIC
18 NIC
19 NIC
20 LOIN
21 NIC
22 NIC
23 BUFF_VD
24 NIC
NIC
12
NIC
11
NIC
10
LNA_VG2
13
IF_I
14
NIC
15
MIX_VG
16
BUFF_VG
25
NIC
26
GND
27
NIC
28
IF_Q
29
NIC
30
LNA_VD2
31
NIC
32
LNA_VD1
EPAD
15133-001
HMC8108
Figure 1.
GENERAL DESCRIPTION
The HMC8108 is a compact, X-band, gallium arsenide (GaAs),
monolithic microwave integrated circuit (MMIC) in-phase/
quadrature (I/Q), low noise converter in a ceramic, leadless chip
carrier, RoHS compliant package. The HMC8108 converts radio
frequency (RF) input signals ranging from 9 GHz to 10 GHz to a
typical single-ended intermediate frequency (IF) signal of 60 MHz
at its output. This device provides a small signal conversion gain
of 13 dB with a noise figure of 2 dB and image rejection of 20 dBc.
The HMC8108 uses a low noise amplifier followed by an image
reject mixer that is driven by an active LO buffer amplifier. The
image reject mixer eliminates the need for a filter following the
low noise amplifier and removes thermal noise at the image
frequency. I/Q mixer outputs are provided, and an external 90°
hybrid is needed to select the required sideband. The HMC8108
is a much smaller alternative to hybrid style, image reject mixer,
downconverter assemblies and is compatible with surface-mount
manufacturing techniques.
