HPA665
USB2ANY
Texas Instruments
50
Setup
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4
SNAU160E – March 2014 – Revised October 2017
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Copyright © 2014–2017, Texas Instruments Incorporated
LMX2492EVM Evaluation Module
2
Setup
2.1
Connection Diagram
Figure 1. EVM Connection Diagram
2.2
Power Supply
Apply 5-V to Vcc_5V SMA connector. The on-board VCO and the optional op-amp require 5-V supply
while the on-board XO and LMX2492 need 3.3-V supply. The on-board LDO regulates 5-V down to 3.3-V.
Never apply more than 6-V to Vcc_5V SMA connector or otherwise the LDO will be damaged. The total
current consumption of the board is about 240 mA.
2.3
Reference Clock
By default, the board is operated with the on-board 100-MHz CMOS XO. If required, the board can be
modified to operate with an external clock source. In this case, apply a single-ended clock to the OSCin
SMA connector or apply a differential clock to both OSCin and OSCin* SMA connectors. See
Appendix B
for details.
2.4
RF Output
Connect RFout/2 SMA connector to a spectrum analyzer or a signal analyzer. By default, the output signal
frequency is 4.8 GHz and the amplitude is about –3 dBm. Because the frequency accuracy of the on-
board XO is 25 ppm, RF output frequency may also be off by 25 ppm. The phase noise of the XO is not
bad but not excellent, as a result, RF output phase noise may not look very good.
2.5
Programming
Connect the uWire header to a PC using the USB2ANY module. The firmware of the USB2ANY may not
be up-to-date. In this case, follow the procedures outlined in
Appendix A
to get it updated.
2.6
Evaluation Software
Download and install TICS Pro to a PC. Run the software and follow the following steps to get started.
1. Go to "Select Device"
→
"PLL"
→
LMX2492
