7.3.3 Analog Output

The AMC0x11D provides a differential analog output voltage on the OUTP and OUTN pins proportional to the

input voltage. For input voltages in the range from VFSR, MIN to VFSR, MAX, the device has a linear response with

an output voltage equal to:

VOUT = VIN = (VINP – VSNSN)

(1)

At zero input, both pins output the same common-mode output voltage VCMout, as specified in the Electrical

Characteristics table. For absolute input voltages greater than |VFSR | but less than |VClipping|, 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 input voltage exceeds the VClipping value.

Input Voltage (VIN)

Linear input range (VFSR)

Maximum input range before clipping (VClipping)

0

VClipping

VFSR

VOUTP

VOUTN

VCMout

VFAILSAFE

VCLIPout

Figure 7-2. Input to Output Transfer Curve of the AMC0x11D

The AMC0x11D output offers a fail-safe feature that simplifies diagnostics on a system level. Figure 7-2 shows

the behavior in fail-safe mode, in which the AMC0x11D 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 AMC0x11D device is missing

• When the high-side supply VDD1 falls below the undervoltage threshold VDD1UV

Use the maximum VFAILSAFE voltage specified in the Electrical Characteristics table as a reference value for

fail-safe detection on a system level.

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SBASAR3 – DECEMBER 2024

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