Hello,
I am working with a Typhoon HIL 101 connected to a TI TMS320F28379D LaunchPad through the Typhoon LaunchPad Interface Board. Using Simulink (External Mode), I want to measure 3-phase voltages and currents from a simple RL load model (40.82 V phase RMS, 100 V L-L peak, 60 Hz).
Setup:
AO channels mapped in Typhoon schematic to interface board → LaunchPad ADC pins
AO gain/offset configured per documentation
In Simulink: ADC blocks configured, offset and scaling applied, followed by a 1-pole LPF (tested cutoffs 500/200/100 Hz)
Issue:
Instead of clean sine waves, I see very noisy/step-like signals. Changing filter cutoff or scaling does not help. Mid-code offset (2048 for 0–3 V, 12-bit) seems correct, but waveforms remain distorted.
Questions:
Recommended ADC sample time/SOC config for 60 Hz signals with Typhoon AO?
Is external RC filtering needed at the ADC input in addition to digital LPF?
Any known good example (AO scaling + ADC config) for HIL101 → LaunchPad → Simulink?
Could this be due to AO update/ZOH steps from HIL, and how to best align sample rates?
Any guidance or shared experience would be greatly appreciated.
