LMK00105: CLKin Biasing volatge

cafain

Mastermind 6365 points

Part Number: LMK00105

LMK00105

Regarding the bias voltage of the CLKin terminal.

8.1.1 Clock Inputs in the data sheet(SNAS579G)
It says "The CLKin input has an internal bias voltage of about 1.4 V,".

Actually checking 21pin (CLKin) of the device is about DC 0.4V.

I expect 1.4V, but it was 0.4.
Do you know why?
The circuit configuration is the data sheet (SNAS 579 G) page 12 Figure 6.

best regards
cafain

over 5 years ago

0 Timothy T over 5 years ago

TI__Mastermind 28530 points

Hello Cafain,

Is 0.4 V what you measure on both non-inverting and inverting CLKin?

Can you confirm the voltage on all the supply pins? Can you confirm the SEL pin is low? Do you get an output when an input is provided?

73,
Timothy

0 cafain over 5 years ago in reply to Timothy T

Mastermind 6365 points

Hi, Timothy san

I appreciate your support.

It is subject of the title, but it was settled.
Once again we measured again,
It was confirmed that about 1.4 V was output as the data sheet.

best regards

cagain

0 Timothy T over 5 years ago in reply to cafain

TI__Mastermind 28530 points

Great,

Let us know if you are in need of any further assistance.

73,
Timothy

Clock & timing

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LMK00105: CLKin Biasing volatge