SPRUJ53D April 2024 – April 2026 TMS320F28P550SG , TMS320F28P550SJ , TMS320F28P559SG-Q1 , TMS320F28P559SJ-Q1
Using a dedicated input channel, gain balancing between multiple ADCs can be performed. By calculating the relative gain error between the ADCs, conversion results can be post-processed in software such that each ADC has the same output for each equivalent input.
To perform gain calibration, configure the ADC SOC to sample channel ADCIN31. On this channel, the voltage sampled by all ADCs when triggered is (VREFHI ˟ 0.9).