SLAU846B June 2023 – November 2024 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G1519 , MSPM0G3105 , MSPM0G3105-Q1 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3505 , MSPM0G3505-Q1 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1 , MSPM0G3519
The internal feedback loop can be programmed to a unity gain configuration to support OPA buffer mode. The noninverting input can be sourced from a variety of signals such as the external OPAx_INx or the on-board DAC and VREF peripherals. The OPA can output to an external pin by setting OUTPIN = 0x1 or be internally routed to on-board analog peripherals such as the ADC, COMP, and/or paired OPA by setting OUTPIN = 0x0.
Figure 14-3 shows the block diagram of the OPA in buffer mode with external OPAx_IN0+ as the noninverting input and the output internally routed to the ADC.
Figure 14-4 shows the block diagram of the OPA in buffer mode with DAC8.x_OUT as the noninverting input and the output routed out to a device pin. This mode enables the user to use the OPA peripheral as an output buffer for the comparator onboard reference DAC.