SAM L21

41.6.10.4 Cascaded Inverting PGA

The OPAMPs can be configured as three cascaded, inverting PGAs using these settings in OPAMPCTRLx:

Table 41-5. Cascade of three inverting PGAs (Example: R1=4R, R2=12R)
	MUXPOS	MUXNEG	RES1MUX	POTMUX	RES2VCC	RES2OUT	RES1EN	ANAOUT
OPAMP0	011	001	01	100	0	1	1	0
OPAMP1	011	001	10	100	0	1	1	0
OPAMP2	011	001	10	100	0	1	1	0

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