Apparatus and a method for providing an output parameter and a sensor device

An apparatus for providing an output parameter, the apparatus comprising:

• an output parameter generator circuit configured to determine a value of an output parameter, wherein the output parameter generator circuit comprises at least one mandatory signal path for the determination of the value of the output parameter;
• and
• a test circuit configured to execute a basic functionality test to test a basic functionality of the at least one mandatory signal path of the output parameter generator circuit repeatedly by providing input test data to an input of the at least one mandatory signal path and analyzing output test data caused by the input test data and received from an output of the at least one mandatory signal path, wherein the test circuit is configured to execute the basic functionality test repeatedly after a predefined number of values of the output parameter are determined, after equal time intervals, or after receiving a trigger from an external control unit.