The AMC0380D-Q1 provides a differential analog output voltage on the OUTP and OUTN pins that is proportional to the input voltage. For input voltages in the range from V_{FSR, MIN} to V_{FSR, MAX}, the device has a linear response with an output voltage equal to:

At zero input, both pins output the same common-mode output voltage V_CMout, as specified in the Electrical Characteristics table. For absolute input voltages greater than |V_FSR | but less than |V_Clipping|, the differential output voltage continues to increase in magnitude, but with reduced linearity performance. The outputs saturate at a differential output voltage of V_CLIPout, as shown in Figure 6-2, if the input voltage exceeds the V_Clipping value.

Figure 6-2 Input to Output Transfer Curve of the AMC0380D-Q1

The AMC0380D-Q1 output offers a fail-safe feature that simplifies diagnostics on a system level. Figure 6-2 shows the behavior in fail-safe mode, in which the AMC0380D-Q1 outputs a negative differential output voltage that does not occur under normal operating conditions. The fail-safe output is active:

• When the high-side supply VDD1 of the AMC0380D-Q1 device is missing
• When the high-side supply VDD1 falls below the undervoltage threshold VDD1_UV

Use the maximum V_FAILSAFE voltage specified in the Electrical Characteristics table as a reference value for fail-safe detection on a system level.