SLAU846A June 2023 – October 2023 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G3105 , MSPM0G3105-Q1 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3505 , MSPM0G3505-Q1 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1
The GPAMP integrates a chopper stabilized low-power rail-to-rail input/output operational amplifier. It can be reconfigured in real-time to meet the performance requirements of various applications. The following table depicts all of the amplifier analog core features and parameters that are configurable:
Parameter | Configuration Options |
---|---|
Rail-to-Rail Input (RRI) | Mode 0 / Mode 1 / Mode 2 |
Chopping (CHOPCLKMODE) | Standard Chop / Disabled |
In some basic signal conditioning applications, rail-to-rail input is not required and thus can be disabled to reduce overall power consumption. Rail-to-rail input can be disabled by programming the RRI bit field to 0x0 (Mode 0). Refer to the GPAMP specifications in the device specific data sheet for supported common-mode input ranges in the various RRI modes.
In some analog sensing applications, high accuracy and low offset drift is a requirement. For these use-cases, chopping can be enabled to significantly improve offset voltage and offset drift performance. Please refer to Section 13.2.6 for more details on how to properly configure and leverage the chopping feature of the GPAMP.