AMC1100: AMC1100

Amruta Bhujbal67

Part Number: AMC1100
Other Parts Discussed in Thread: TIDA-01555, TIDA-00555

We are working again on the same project 3Ph voltage measurement using AMC1100.As per attached functional block diagram.

Need to understand the effect of connecting to-gather mains neutral with AMC1100 input side GND. Considering the electrical noise of all three phase will return through the common neutral.

3_Ph_Voltage_Sensing_AMC1100.pdf

over 5 years ago

0 kai klaas69 over 5 years ago

Guru 140200 points

Hi Amruta,

what is your question?

Kai

0 Amruta Bhujbal67 over 5 years ago in reply to kai klaas69

Intellectual 390 points

Hi,I wanted to know
1. Should I connect to-gather mains neutral with AMC1100 input side GND.
2. What is the effect of electrical noise of all three phase which will return through the common neutral.

0 JohnFullilove over 4 years ago in reply to Amruta Bhujbal67

TI__Expert 5120 points

Amruta, hello. I noticed that you haven't received an answer for this design. Our apologies. Please advise if you still need assistance with your question regarding the AMC1100. In the meantime, I am going to loop in the design owner for the TIDA-01555, which I was advised you are asking about here.

Best Regards,
J. Fullilove
Texas Instruments
Reference Design Operations

0 kai klaas69 over 4 years ago in reply to Amruta Bhujbal67

Guru 140200 points

Hi Amruta,

yes, you can do this. And figure 37 of datasheet of AMC1100 shows an optional way to generate the supply voltage VDD1. But do not connect VINN directly to mains neutral. Instead use some input filtering, as shown in figure 34 and 39 of datasheet. Of course, use an individual input filter for each AMC1100.

Kai

0 Kallikuppa Sreenivasa over 4 years ago

TI__Guru** 122998 points

Hello

When multiple voltage are measured as group isolated measurement module, you will have to tie the neutral.

The effect of noise depends on the layout and we have achieved 0.1% measurement accuracy from 5V to 280V.

Thanks

Sreenivasa

0 Amruta Bhujbal67 over 4 years ago in reply to JohnFullilove

Intellectual 390 points

Hello,

Thank you for reply for post related to AMC1100.Yes I still need help with question regarding AMC1100.

0 Kallikuppa Sreenivasa over 4 years ago in reply to Amruta Bhujbal67

TI__Guru** 122998 points

Hello Amruta

I am not sure what helo you are looking for.

In case your question is on the noise effect, i do not see that affecting the measurement if you take care of the routing as per TIDA-00555 in your design.

Thanks

Sreenivasa

0 kai klaas69 over 4 years ago in reply to Amruta Bhujbal67

Guru 140200 points

Hi Amruta,

there is no special noise issue, when connecting mains neutral to GND1 of AMC1100. This is the best you can do, anyway. But use the input filtering as mentioned in my last post:

e2e.ti.com/.../2947793

Kai

Amplifiers

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AMC1100: AMC1100