7
Rev. A - v00.1212
Order On-Line: www.hittite.com. For technical application questions: Tel: 978-250-3343 or @hittite.com
HMC1023LP5E Evaluation Kit User Manual
Figure 5. HMC1023LP5E Evaluation Board Single-Ended Output Configuration
4.2 HMC1023LP5E Evaluation Board Interface to Test Equipment
To provide seamless interface to standard off-the-shelf test equipment, the HMC1023LP5E
Evaluation Board has an on-board impedance matching network shown in Figure 3 and
Figure 5 for differential and single-ended output configuration respectively.
The impedance matching network transforms HMC1023LP5E’s load impedance of 400 Ω
differential to 100 Ω differential (50 Ω single-ended), which is common input impedance
for test equipment.
When observing voltage levels out of the HMC1023LP5E Evaluation Board, the impedance
transformation, resulting from the matching network, needs to be considered.
The impedance transformation will result in an observed voltage drop of ≈ 16.8 dB
(
140 / /100
20log
16.8
140 / /100
174
174
o
I
I
V
V
V
dB
Ω
Ω
=
+
=
−
Ω
Ω +
Ω +
Ω
) using differential setup. Single-ended
operation will result in additional 3 dB voltage loss (19.8 dB total voltage loss) due to the
2:1 balun turns ratio.
5. Software Installation/Uninstallation
Double click on “HMC1023LP5E Evaluation Software Installer.exe” and follow the
installation/uninstallation wizard.
6. Get Started with Hittite LPF Eval Software
1. Launch the software by double clicking on the icon. The main window should open.
See figure below.
