LMX2572LPEVM: Default output is not stable

ishii.takeshi

Part Number: LMX2572LPEVM
Other Parts Discussed in Thread: LMX2572LP, LMX2572

Hello,

LMX2572LPEVM,Default output is not stable.

sometimes

・Default Configuration/Default Mode 2021-8-15→1500MHz

・Default Configuration/Test Mode→100MHz

some other time

・Default Configuration/Default Mode 2021-8-15→1800MHz

・Default Configuration/Test Mode→224MHz

The procedure is as follows.
(Output value of stabilized power supply)

(1)PC ON、EVM ON(3.3V/34mA)

(2)Connect PC and EVM

(3)start the software TICS Pro EVM(3.3V/41mA)

(4)Select Device/PLL+VCO/LMX2572/LMX2572LP

sometimes

(5)Default Configuration/Default Mode 2021-8-15→1500MHz(3.3V/88mA)

(6)Default Configuration/Test Mode→100MHz(3.3V/95mA)

some other time

(5)Default Configuration/Default Mode 2021-8-15→1800MHz(3.3V/48mA)

(6)Default Configuration/Test Mode→224MHz(3.3V/62mA)

+1 Noel Fung over 3 years ago

Hi Takeshi-san,

You need to click CTRL+L (USB communications --> Write All Registers) to load all the registers once after a Vcc power up.

My preference test procedure as follows:

1. open TICS Pro

2. select LMX2572LP

3. select Default configuration (Default Mode 2021-8-15)

4. connect Ref PRO board (the green board) to a PC

5. Vcc power up LMX2572LP EVM

6. Ctrl + L to load all the registers once

0 ishii.takeshi over 3 years ago in reply to Noel Fung

Dear Noel Fung,

Thank you very much.
It went well.

Continue to check the operation for 2-3 days.

I will contact you again with the results.

0 ishii.takeshi over 3 years ago in reply to ishii.takeshi

Dear Noel Fung,

Then no problem.
seems to have been resolved.
thank you very much.

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