44.6.10.9 Transimpedance amplifier

Each OPAMP can be configured as a transimpedance amplifier (current to voltage converter). In this mode the positive input is connected to ground. The negative input is connected to the output through the resistor ladder. The OPAMPCTRLx register can be configured as follows:

Table 44-14. Transimpedance Amplifier
MUXPOS MUXNEG RES1MUX POTMUX RES2VCC RES2OUT RES1EN ANAOUT
OPAMP0 0010 000 - - 0 0 0 0
OPAMP1 0010 000 - - 0 0 0 0
OPAMP2 0010 000 - - 0 0 0 0
Figure 44-10. Transimpedance Amplifier
Note: R1 and R2 are external user supplied resistors.