8.4.1 Fail-Safe Output

In the case of a missing high-side supply voltage (AVDD), the output of a ΔΣ modulator is not defined and could cause a system malfunction. In systems with high safety requirements, this behavior is not acceptable. Therefore, the AMC1305 implements a fail-safe output function that ensures the device maintains its output level in case of a missing AVDD, as shown in Figure 51.

Figure 51. Fail-Safe Output of the AMC1305