AD2S1210 EMI Filtering

Hi BBKK ,

We'll look into this and get back to you.

Regards,
Jo

Hello BBKK ,

May we know what will be your specific application since you have considered using an EMI filter and CMC?

Thanks and regards,
Jo

Hello NathanT 

I only know that the application is to control a motor with high RPM more than thousands.

Hi BBKK ,

You can try checking this circuit note. Resolver filters were mentioned in this: CN-0276 (Rev 0) (analog.com)

On the other hand, let me get back to you regarding the smd cmc suggestion while you can try checking this query, chokes were mentioned here. It was mentioned that they were getting errors and one suggestion was removing the choke. So we still recommend what are on the circuit note and what is on its product page. (+) Resolver Angle Error - Q&A - Precision ADCs - EngineerZone (analog.com)

Can you also provide us other details about the application?

Regards,
Jo

Hi Jo,

On received SIN and COS signals there are ripples which we cannot suppress with recommended RC filter and this ripples are on both differential signals. I also checked other query but there is no information about the effect of using CMC on RDC signals. We also use Tamagawa product but we don't have any test output to observe the filter.

Hello BBKK ,

Do you have a snapshot and/or data that you can share with us?

Regards,
Jo

Hi Jo,

I have received the a snapshot of sine waveform (black wave, green and yellow ones are single ended parts) from test site. The question is how can we filter out the sharp vertical lines on blackwave form? At this configuration there is no CMC 

Hi, BBKK .

Is the black signal coming from the excitation signal? If not, can you try also showing the excitation signal to check whether the spikes can also be seen?

Would it be also possible to send your schematic or a block diagram? If I understood correctly, you are not using our evaluation board, right? 

Thanks and regards,
Jo