EFM32WG Datasheet, PDF (733/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

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Figure 30.9. Two Op-amp Differential Amplifier Overview
V2
V1
+
OPA0
-
R1
+
OPA1
-
R2
VDIFF= (V2-V1)R2/R1
V2
V1
+
OPA1
-
R1
+
OPA2
-
R2
VDIFF= (V2-V1)R2/R1
Table 30.7. OPA0/OPA1 Differential Amplifier Configuration
OPA
OPA0
OPA0
OPA0
OPA0
OPA1
OPA1
OPA1
OPA bit-fields
POSSEL
NEGSEL
RESINMUX
NEXTOUT
POSSEL
NEGSEL
RESINMUX
OPA Configuration
POSPAD1
UG
DISABLE
1
POSPAD1
OPATAP
OPA1INP
Table 30.8. OPA1/OPA2 Differential Amplifier Configuration
OPA
OPA1
OPA1
OPA1
OPA1
OPA2
OPA2
OPA2
OPA bit-fields
POSSEL
NEGSEL
RESINMUX
NEXTOUT
POSSEL
NEGSEL
RESINMUX
OPA Configuration
POSPAD1
UG
DISABLE
1
POSPAD1
OPATAP
OPA1INP
30.3.2.8 Three Opamp Differential Amplifier
This mode enables the three opamps to be internally configured to form a three opamp differential
amplifier as shown in Figure 30.10 (p. 734) . Both OPA0 and OPA1 can be configured in the same
unity gain mode. For both OPA0/OPA1 the positive input can be connected to any input by configuring
the OPA0POSSEL/OPA1POSSEL bit-field. The OPA0/OPA1 feedback path must be configured to unity
gain by setting the OPA0NEGSEL/OPA1NEGSEL bit-field to UG. In addition the OPA0RESINMUX/
OPA1RESINMUX bit-fields must be set to DISABLED. The OPA1 output must be connected to
OPA2 by setting the NEXTOUT bit-field in DACn_OPA1MUX and OPA2RESINMUX to OPA1INP in
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
733
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