The 50 MHz clock on the C28x core delivers roughly 50 MIPS of sustained throughput. For a typical field-oriented motor control loop sampling at 20 kHz, that leaves enough headroom for the current regulators, flux-weakening, and a comms stack without cycle-stealing gymnastics.
Automotive temperature and qualification
The TMS320F28022DAQR is in an end-of-life (EOL) phase. Production has stopped or is stopping, and the last-time-buy window has closed or is closing. The primary supply route now is the independent surplus and broker channel.