LMH5401: Vcm check

[FAE] Andrew Wang

Part Number: LMH5401

Hi Team,

I would like to double check if we set CM pin at 0V, out+ and out- showing offset voltage like +22mV and -76mV, if this amount of common mode voltage offset is normal for this device?

Thanks!

Andrew

lmh5401 (Vcm Check).TSC

over 3 years ago

+1 kai klaas69 over 3 years ago

Guru 140200 points

Hi Andrew,

keep in mind that you haven't set both input voltages to zero. With zero input voltages -27mV "VOCM output common-mode offset from VCM input voltage" can be seen, according to page 7 of datasheet:

Kai

0 [FAE] Andrew Wang over 3 years ago in reply to kai klaas69

TI__Genius 10685 points

You are the man, Kai master!

Thanks.

0 kai klaas69 over 3 years ago in reply to [FAE] Andrew Wang

Guru 140200 points

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LMH5401: Vcm check