SYSTEMS AND METHODS FOR INTERNAL AND EXTERNAL ERROR DETECTION IN SENSOR OUTPUT INTERFACES

摘要

Integrated circuit systems, such as sensor systems, having on-board-diagnostic (OBD) circuits for the detection of errors presenting internal to the systems are disclosed, along with related methods. In one embodiment, an ADC multiplexer receives analog output readback from an output driver and provides a signal triggering an OBD circuit for internal error indication performed completely independent of digital-to-analog converters (DAC) and output drivers, which can be the point of failure.

主权项

1. An integrated circuit system comprising:
at least one on-board diagnostic circuit; an output driver configured to provide a system output signal; and a control unit coupled to the at least one on-board diagnostic circuit and configured to compare the system output signal with a value and to provide an error output signal via the at least one on-board diagnostic circuit when the comparison indicates an error.