AMC1203: About Radiated Emission

Kenji Ohno1

Genius 5095 points

Part Number: AMC1203

Hi Team,

There is a noise problem in my customers.

I want advice for measures.

On the radiation characteristics of EMC test.

60 dBuV / m at 200 MHz

Since it exceeds the standard value largely, it needs to be made small.

Please tell me something specific way.

Best Regards,

Kenji

over 6 years ago

0 Tom Hendrick over 6 years ago

TI__Guru**** 168485 points

Hi Kenji,

Without seeing the test result and the layout of the AMC1203 board being tested, it's a little difficult to debug what the problem might be from the information provided. I'll send you a note and see what we can do to help out.

0 Tom Hendrick over 6 years ago in reply to Tom Hendrick

TI__Guru**** 168485 points

Hi Kenji,

Thank you for the additional information you provided. The changes seem to have made a difference! I'll send more detail in the morning.

0 Kenji Ohno1 over 6 years ago in reply to Tom Hendrick

Genius 5095 points

Hi Tom,

I was informed that the proposed measures were effective.
Customer passed the EMC test.
Measures are below.
· Add ferrite beads to power supply lines (VDD1, VDD2)
· Add RC to output line (MCLK, MDAT) (100 Ω, 33 pF)
If you have any other points to notice, please contact me individually.

I appreciate your support.
Best Regards,

Kenji

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AMC1203: About Radiated Emission