AMC1200-Q1: AMC1200-Q1

Hi Danienpark,

the LEM LV25-P already provides isolation. Why would you want to add the AMC1200?

Kai

Hi Kai,

The input of ADC accept the voltage level between 0 vlt and 3,33 volt. 

The output of the voltage sensor has negative alternanse.

So I would like to shift the negative part pf the voltage sensor output voltage using AMC1200Q1.

Hi Danienpark

I understand that you would like to shift the output signal of LV25-P. But why with an AMC1200? Do you really need two isolators in series?

Kai

Dear Kai,

That is right , the reason is , I have AMC1200Q1 and I would like to use it. 

I have two LV25-P and I will measure phase to phase voltages using these two sensors, then II will connect it to  AMC1200Q1. 

The output of LV25P will be sinus voltage and will have positive and negative part probably between -3V to +3V peak to peak sine wave. As I know that the inputs of analog digital converters of DSP can not accept negative value. We have to shift negative values to positive part. So I have AMC1200Q1 and I would like to use these devices in order to shift the voltage.

Danien

Hi Danien,

has your DSP differential inputs according to figure 36 of datasheet of AMC1200?

Kai

Hi Danien,

If you really want/need to use an isolation amplifier here, I would suggest that you look into the ISO224 rather than the AMC1200.  Your ~+/-3V out from the LEM sensor is 12x larger the analog input range of the AMC1200.  The ISO224 can accept single ended inputs to +/-12V.

Hi Danien,

I would do it this way:

danien_amc1200.TSC

Kai