Other Parts Discussed in Thread: AMC1306M05
there is some error at the current sensor data. like 0.25A dynamic error.
AVDD is 5V, about 50mV voltage ripple.
does this affect sample accuracy? how much it will impact.
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there is some error at the current sensor data. like 0.25A dynamic error.
AVDD is 5V, about 50mV voltage ripple.
does this affect sample accuracy? how much it will impact.
Hi Lina,
Do you have a output waveform from your controller that shows the sampled data?
What is the size of your shunt resistor?
Does the error change over time or is it static 0.25A?
Hi Lina,
Thank you. I would not expect a ripple of 50mV to cause such an issue.
What are your SDFM settings for OSR and clock speed?
Can you please provide scope capture of the clock and data at the pins of the SDFM?
I assume that this measurement is taken while the system is running. Is it possible to measure the input voltage of the AMC1306M25 as well, with high voltage probes if necessary, or use a known input voltage to confirm correct SDFM operation?
Hi Lina,
The clock and data from the AMC1306M05 should be connected to a controller with a sigma delta filter module (SDFM) to collect the data and decimate to output readings.