SPRUHX5I August 2014 – May 2024 TMS320F28374S , TMS320F28375S , TMS320F28375S-Q1 , TMS320F28376S , TMS320F28377S , TMS320F28377S-Q1 , TMS320F28378S , TMS320F28379S
Zero offset error is defined as the difference between the voltage at midcode (2048) and 1.25V (for 2.5V reference voltage). DAC offset error is calibrated at 2.5V reference voltage and loaded into the DAC offset trim register as part of the Device_cal() function. If the DAC is used at any reference voltage other than 2.5V, the offset trim must be adjusted to make sure the offset error performance stays within the device-specific data sheet limits. The DAC offset register is a 16-bit register that contains the 8-bit signed offset trim in the lower half of the register. Use the function call DAC_tuneOffsetTrim() found in C2000Ware to adjust the offset.