Other Parts Discussed in Thread: AMC3336
Tool/software:
Dear TI Community,
I an seeking support regarding strange data artefacts on measurements with the AMC1210.
AMC1210 is demodulating the output of AMC3336.
We have observed glitches on two input test cases :
1. Mains grid 230VAC (50Hz) (scaled 500:1)
2. Zero Voltage (shorted AMC3336 inputs)
Often the 16-bit result hits full-scale (ie. 32767 or -32768) where we see these glitches, but other values below this (but well in excess of the valid full-scale measurement range) have also appeared.
On test case 1 (mains AC), the glitches often appear around the zero crossings, but not always.
On test case 2 (0VDC), the glitches seemed to be occurring periodically.
Configuration:
- 3rd order Sinc Filter
- Oversampling Ratio = 32
- Integrator disabled
- Modulation frequency = 20MHz (external 40MHz clock, divider factor 2)
- SPI Clock Speed = 15MHz (acquiring samples from AMC1210 at 20kHz)
Main AC raw data:
0VDC data:
