AFE5816: Question about CHOPPER function

Takumi Suzuki1

Mastermind 8630 points

Part Number: AFE5816
Other Parts Discussed in Thread: OPA333

Hi,

I would like to ask you a question about "CHOPPER" function of AFE5816 as below.

AFE5816 has a chopper function controled by "CHOPPER_EN", register 7 bit0.

Is this function the same as the function of "Zero-drift Opamp" like for example OPA333?

www.tij.co.jp/.../sboa182a.pdf

Thank you for your support.

Best Regards,

over 8 years ago

0 Scott Cummins over 8 years ago

TI__Mastermind 31655 points

Hello Takumi,

This device is part of the Medical devices forum. I am moving your question over there where you will get a better response.

Regards,

0 Takumi Suzuki1 over 8 years ago in reply to Scott Cummins

Mastermind 8630 points

Hi Scott-san,

Thank you for your kindness!
Regards,

0 Praveen Aroul over 8 years ago

TI__Guru 50036 points

Hi Takumi-san,

The chopper function moves the DC signal noise to fs/2 band.

0 Takumi Suzuki1 over 8 years ago in reply to Praveen Aroul

Mastermind 8630 points

Hi Praveen-san,

Thank you for your reply.
I understood.
The chopper mechanism is the same/similar as the one of like OPA333 zero-drift OPamps, correct?

Regards,

Data converters

Data converters forum

AFE5816: Question about CHOPPER function