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Part Number: ISO124
My customer is using ISO124, they are curious about if this device supports the "No phase reversal" feature? How about ISO224? Thanks.
I am not sure what this feature is. Do you have additional information? Is your customer asking if they are inverting op-amps?
There is some propagation delay, but they are not inverting.
Alex SmithApplications Engineer | Precision Delta-Sigma Converters
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In reply to Alexander Smith:
Thank you for your help here. You can see the definition of phase reversal below. Customer is worried about below condition, when VS1 = VS2 = ±15 V and the input voltage higher than 15V, what will happened to the output? Thanks.
"Phase reversal is a condition that may occur with op amps and instrumentation amplifiers when the applied input common mode voltage approaches a voltage outside of the specified common mode voltage range. At that point the output slams to the opposite rail. It appears when the input pins were reversed."
In reply to Lin_Charles:
Ah I see now.
I do not think this will be an issue since these devices are not op amps or instrumentation amplifiers. They are really delta-sigma modulators with a filter on the low side of the device. Please see this video for further information on basic device structure: https://training.ti.com/introduction-isolated-amplifiers
Under the described conditions I would expect the output to clip, not reverse. Additionally, the ISO124 will require some headroom from the voltage rails ~2.5V to operate without clipping.
Thank you for your help here.
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