Figure 144. Pga Mode, Internal Gain Setting (X2/X4/X8/X16), Inverting Input Not Used - ST STM32L4x6 Reference Manual

RM0351
Programmable Gain Amplifier mode
The procedure to use the OPAMP to amplify the amplitude of an input signal is
presented hereafter.
•
configure OPAMODE bits as "internal PGA enabled",
•
configure PGA_GAIN bits as "internal PGA Gain 2, 4, 8 or 16",
•
configure VM_SEL bits as "inverting not externally connected",
•
configure VP_SEL bits as "GPIO connected to VINP".
As soon as the OPAEN bit is set, the signal on pin OPAMP_VINP is amplified by the
selected gain and visible on pin OPAMP_VOUT.
Note: To avoid saturation, the input voltage should stay below V

Figure 144. PGA mode, internal gain setting (x2/x4/x8/x16), inverting input not used

DocID024597 Rev 3
Operational amplifiers (OPAMP)
divided by the selected gain.
DDA
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