AMC1311: when Vin is off, output status

Johnson David

Prodigy 110 points

Part Number: AMC1311
Other Parts Discussed in Thread: ISO224

Tool/software:

Dear.Ti

I would like to know what will happen to the states of OUTP and OUTN when Vin(VDD1) is turned off.

If Vin(VDD1) is ON with SHTDN in low state, I wonder if OUTP and OUTN will be output as LOW.

In my opinion, it seems that under such conditions, VCMout(1.44V) or Max Vout may occur.

I want to apply an IC where OUTP and OUTN are set to Low outputs when Vin(VDD1) is off and Vout(VDD2) is on.

please let me know if there's any device available for this purpose.

Best Regard

over 1 year ago

+1 Saleh Ahmad over 1 year ago

TI__Expert 6370 points

Hi Johnson,

The AMC1311 has a fail-safe output in which the outputs are driven to a high differential output defined below. This output is distinguishable from normal operating conditions and can be used to diagnose a missing or low high side supply.

The ISO224 has a fail-safe output where the outputs go to GND when the high side is unpowered.

Thanks.

0 Johnson David over 1 year ago in reply to Saleh Ahmad

Prodigy 110 points

Thanks! Have a good day

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AMC1311: when Vin is off, output status