9.2.3 Application Curve

One important aspect of system design is the effective detection of an overvoltage condition to protect switching

devices and passive components from damage. To power off the system quickly in the event of an overvoltage

condition, a low delay caused by the isolated amplifier is required. Figure 9-4 shows the typical full-scale step

response of the AMC1311.

VIN

VOUTN

VOUTP

Figure 9-4. Step Response of the AMC1311

9.3 What To Do and What Not To Do

Do not leave the analog input (IN pin) of the AMC1311 unconnected (floating) when the device is powered up

on the high-side. If the device input is left floating, the bias current may generate a negative input voltage that

exceeds the specified input voltage range, causing the output of the device to be invalid.

Do not connect protection diodes to the input (IN pin) of the AMC1311. Diode leakage current can introduce

significant measurement error especially at high temperatures. The input pin is protected against high voltages

by its ESD protection circuit and the high impedance of the external restive divider.

AMC1311

SBAS786C – DECEMBER 2017 – REVISED JUNE 2022

www.ti.com

26

Submit Document Feedback

Copyright © 2022 Texas Instruments Incorporated

Product Folder Links: AMC1311