3.2.14 Operational Amplifier (OPAMP)
An operational amplifier is a type of analog circuit that is designed to amplify the difference between the inputs non-inverting (positive) and inverting (negative) inputs. Op amps can be connected in Inverting and Non Inverting Applications and are commonly used to buffer or amplify signals, such as the signals from sensors, current shunts and resistive dividers.
Using The Library
The op amp modules implemented in particular family devices provide the following features:
• 100 MHz Gain Bandwidth
• High-Power and Low-Power Operating Modes
• Complementary P and N Channel Differential Pairs on the Input
• User Adjustable Offset
Library Interface
Operational Amplifier peripheral library provides the following interfaces:
Functions
| Name | Description |
|---|---|
| OPAx_Initialize | Initializes the OPAx module of the device |
| OPAx_Deinitialize |
Deinitializes the OPAx module of the device |
| OPAx_Enable |
Enables the OPAx module of the device |
| OPAx_Disable | Disables the OPAx module of the device |
| OPAx_UnityGainEnable |
Enables/disables unity gain of OPAx module of the device |
| OPAx_HighPowerModeEnable | Enables/disables high power mode of OPAx module of the device |
| OPAx_OutputMonitorEnable |
Enables/disables the output of OPAx module to ADC of the device. |
| OPAx_DifferentialInputModeSet | Sets the differential input mode for the OPAx module of the device. |
| OPAx_OffsetCorrection | Enables/disables Enables output of OPA module to ADC of the device |
Data types and constants
| Name | Description |
| OPA_DIFFERENTIAL_INPUT_MODE | Selecting the differential input mode of the OPAx module |
| OPA_OFFSET_INPUT_TYPE |
Selecting the offset correction type for the OPAx module |
| OPA_OUTPUT_VOLTAGE_OFFSET_CORRECTION |
Selecting the output voltage offset correction for the OPAx module. |