Audio OpAmps for I/V Converter and Differential Output Buffer

Sadanori Kato

Other Parts Discussed in Thread: PCM1794A, OPA627, OPA1637, OPA1656, OPA828

Hi,

Could you please tell me the recommended operational amplifiers which are available as the I/V converter and the differential output buffer for PCM1794A?
I would be grateful if you could suggest me with an emphasis on sound quality.
For example, can OPA627 also be used?

Best regards,
Kato

over 3 years ago

+1 Chris Featherstone over 3 years ago

TI__Mastermind 18425 points

Kato,

For the IV stage take a look at the OPA1637 . It has low input voltage noise, low THD and wide input common mode voltage range. For the following stage take a look at the OPA1656. These two combined will give fantastic sound performance with their low noise, low THD specifications.

0 Sadanori Kato over 3 years ago in reply to Chris Featherstone

Guru 36490 points

Hi Chris-san,

Thank you for the information.

Do you have any plans to develop a successor for OPA627?

Best regards,
Kato

+1 Marek Lis over 3 years ago in reply to Sadanori Kato

TI__Guru 60610 points

Done. Please take a look at OPA828:

www.ti.com/.../opa828.pdf

0 Sadanori Kato over 3 years ago in reply to Marek Lis

Guru 36490 points

Hi Marek-san,

Thank you for the information.

I understand.

Best regards,
Kato

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Audio OpAmps for I/V Converter and Differential Output Buffer