OPA4188: Power On Reset

Sadanori Kato

Part Number: OPA4188
Other Parts Discussed in Thread: OPA4197, OPA376

Hi,

Does OPA4188 have the function of power on reset(POR) such as OPA4197 ?
It seems that OPA4188 doesn't have that function when confirming the operation of OPA4188.

Best regards,
Kato

over 6 years ago

0 kai klaas69 over 6 years ago

Guru 140200 points

Hi Sadanori,

I appreciate your many interesting contributions here! It was a big surprise for me that the OPA4197 has a power on reset. I think somehow that this should be mentioned in the datasheet...

Kai

0 Marek Lis over 6 years ago in reply to kai klaas69

TI__Guru 68931 points

Hi Kai,

Thank YOU for all your help!

In the past package-level trimmed parts like OPA376 would have Vos and drift trim fuses blown by high current (>120mA) sent thru tiny poly resistor but most modern package-level trimmed parts like OPA4197 use OTP technology to set the trimmed code that gets fed in during power-up (POR).

Sadanori,

Since OPA4188 is a chopper amplifier that continously self-calibrates in the real time, there is no trimming being done, thus there can be no talk of POR.

0 Sadanori Kato over 6 years ago in reply to Marek Lis

Guru 36540 points

Hi Marek-san,

Thank you for the information.

I understand.

Best regards,
Kato

0 kai klaas69 over 6 years ago in reply to Marek Lis

Guru 140200 points

Hi Marek,

thank you very much for allowing me this deep insight!

Kai

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OPA4188: Power On Reset