JAJSFO3D June 2018 – June 2021 AMC1302
The AMC1302 offers a differential analog output comprised of the OUTP and OUTN pins. For differential input voltages (VINP – VINN) in the range from –50 mV to 50 mV, the device provides a linear response with a nominal gain of 41. For example, for a differential input voltage of 50 mV, the differential output voltage (VOUTP – VOUTN) is 2.05 V. At zero input (INP shorted to INN), both pins output the same common-mode output voltage VCMout, as specified in the Section 6.9 table. For absolute differential input voltages greater than 50 mV but less than 64 mV, the differential output voltage continues to increase in magnitude but with reduced linearity performance. The outputs saturate at a differential output voltage of VCLIPout, as shown in Figure 7-2, if the differential input voltage exceeds the VClipping value.
The AMC1302 offers a fail-safe feature that simplifies diagnostics on system level. Figure 7-2 shows the fail-safe mode, in which the AMC1302 outputs a negative differential output voltage that does not occur under normal operating conditions. The fail-safe output is active in two cases:
Use the maximum VFAILSAFE voltage specified in the Section 6.9 table as a reference value for fail-safe detection on system level.