AMC1204: AMC1204 TIC solution

Hi Jim,

There is an application note using the AMC1204 in a TIC meter. The GND signal in your diagram can tie to IN (-) and GND1 (AGND) on the AMC1204. You can find the app note here:
www.ti.com/.../slaa619a.pdf

Hi Tom :

Thanks !!!
From ERDF document description , the TIC signal is 6Vrms±10% , 50KHz and maxium 12V .
We know AMC1204 analog power input is 5V , do it need level shift before TIC signal input AMC1204 ?

Regards,
Tyrancy ( Pegatron EE )

Hi Tyrancy -

Welcome to the e2e forum! The analog input range to the AMC1204 is only +/-250 mV so you would need to add a resistor divider to scale the signal down.

Hi Tom :

Could you help to provide the reference circuit for this 50Khz analog signal scale down , thanks!!!

Regards,

Tyrancy

Hi Tyrancy,

The circuit would just be a simple resistor divider - let me get in contact with the authors of the app note I pointed you to and get their feedback on how the TIC was implemented in their setup.

Hi Tom :

Thank you and look forward to your reply !!!

Regards,

Tyrancy

Hi Tom :

Is there updated ? Thanks!!!

Regards,
Tyrancy

Hi Tyrancy,

My understanding from one of the authors of that app note was that they only did a 'proof of concept' and did not actually implement the work in an end meter system.  Essentially they saturated the AMC1204 inputs with a signal generator and used the output to implement the TIC wave-forms seen in the screen shots published in the document.  Since the input to the AMC1204 can't go more than 500mV below GND, you would either have to level shift the signal or scale a resistive divider such that you limit the voltage to the inputs.