The LDC5072-Q1 is equipped with numerous diagnostics features to detect, monitor, and report failures that either existed before the power up or occurred during device operation. In the event of a failure, the LDC5072-Q1 is placed either in IDLE, DISABLED, or FAULT state (based on the failure nature), the LC Oscillator is turned off, the AFE is disabled, and the output pins are tri-stated, and consequently, are pulled up or down by external resistors. From the FAULT state, the LDC5072-Q1 returns to DIAGNOSTICS state if the fault condition is removed. From the DISABLED state, the LDC5072-Q1 is moved to IDLE state after a Power Cycle (see Device Functional Modes).

The LDC5072-Q1 tri-states its output to signal a fault. As shown in Application and Implementation, it is expected that a combination of pullup or pulldown resistors are added on OUTx pins at the termination site (that is, at the microcontroller). The values of these resistors are specified as R_{PU_OUT} and R_{PD_OUT} in Specifications. The resistors are generally pulled up to a supply (typically VCC) and pulled down to ground such that the ADC code on the MCU is out of the expected range. This will signal a fault to the microcontroller.