JAJSE67C December 2017 – June 2022 AMC1311
The AMC1311 provides a differential analog output on the OUTP and OUTN pins. For input voltages of VIN in the range from –0.1 V to +2 V, the device provides a linear response with a nominal gain of 1. For example, for an input voltage of 2 V, the differential output voltage (VOUTP – VOUTN) is 2 V. At zero input (IN shorted to GND1), both pins output the same common-mode output voltage VCMout, as specified in the Section 7.9 table. For input voltages greater than 2 V but less than approximately 2.5 V, the differential output voltage continues to increase but with reduced linearity performance. The outputs saturate at a differential output voltage of VCLIPout, as shown in Figure 8-2, if the input voltage exceeds the VClipping value.
The AMC1311 output offers a fail-safe feature that simplifies diagnostics on a system level. Figure 8-2 shows the fail-safe mode, in which the AMC1311 outputs a negative differential output voltage that does not occur under normal operating conditions. The fail-safe output is active in three cases:
Use the maximum VFail-safe voltage specified in the Section 7.9 table as a reference value for fail-safe detection on a system level.