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| AMC1301-Q1 Datasheet, PDF (18/34 Pages) Texas Instruments – Precision, 250-mV Input, Delay, Reinforced Isolated Amplifier | |||
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AMC1301-Q1
SBAS792A â APRIL 2017 â REVISED APRIL 2017
www.ti.com
Feature Description (continued)
8.3.2 Fail-Safe Output
The AMC1301-Q1 device offers a fail-safe output that simplifies diagnostics on system level. The fail-safe output
is active in two cases:
⢠When the high-side supply VDD1 of the AMC1301-Q1 device is missing, or
⢠When the common-mode input voltage, that is VCM = (VINP + VINN) / 2, exceeds the minimum common-
mode over-voltage detection level VCMov of VDD1 â 2 V.
The fail-safe output of the AMC1301-Q1 device is a negative differential output voltage value that differs from the
negative clipping output voltage, as shown in Figure 47 and Figure 48. As a reference value for the fail-safe
detection on a system level, use the VFAILSAFE maximum value of â2.545 V.
Figure 47. Typical Negative Clipping Output of the
AMC1301-Q1 Device
Figure 48. Typical Failsafe Output of the AMC1301-Q1
Device
8.4 Device Functional Modes
The AMC1301-Q1 device is operational when the power supplies VDD1 and VDD2 are applied, as specified in
Recommended Operating Conditions.
18
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