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TLV3603: Dual power supply questions

Part Number: TLV3603


 If I use the single power supply of TLV3603 with 30mV hysteresis, it could work normally, but if I used +-2.5V power supply, input is +-2V sine, and reference is GND, the output is always high.

TLV3603 is rail to rail input and output, so the input meet the input voltage range, I wonder why its output is abnormal when using dual power supply.

Best regards