OPA356: Ceramic bypass capacitor value

Kei Kuwahara

Expert 6320 points

Part Number: OPA356
Other Parts Discussed in Thread: OPA355,

Hello team,

On datasheet, it recommends to use 10uF ceramic bypass cap. is this a typo?

Isn't it supposed to be 10nF?

Best Regards,
Kei Kuwahara

9 months ago

+1 Nick Nauman 9 months ago

TI__Expert 6050 points

Hi Kei,

Please see this thread for a good explanation: https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1275281/opa356-decoupling-capacitor

The recommended value in the datasheet is correct.

Thanks,

Nick

0 Kei Kuwahara 9 months ago in reply to Nick Nauman

TI__Expert 6320 points

Hi Nick-san,

However, on the datasheet of OPA355 (Almost same device as OPA356), it says "A 10-nF ceramic bypass capacitor is the minimum recommended value;".

Are you sure OPA 356 needs 10uF minimum cap value?

Best Regards,
Kei Kuwahara

+1 Clemens Ladisch 9 months ago in reply to Kei Kuwahara

Guru 290330 points

The linked thread does not actually say anything about specific values.

For high-frequency decoupling, you need 10 nF or so (a low inductance of the traces and package is more important than the exact value). The datasheet text implies that 1 µF is the larger value, so 10 µF is an obvious typo.

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OPA356: Ceramic bypass capacitor value