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OPA2170: Noise issue about output and supply voltage

Part Number: OPA2170
Other Parts Discussed in Thread: OPA2196

Dear Technical Support Team,

Large input signal causes strange noise on power supply and output.

For example input is from GND to 28V, then power supply voltage fluctuates by about 1Vpp and output the output undulates.

After OPA2170, OPA2196 is connected to the same power supply and is a Voltage Follower. I guess that the current of either operational amplifier becomes large and the power supply undulates.

I'd like to share the detail information, is it possible to discuss internally such as e-mail?


 Voltage follower

 Power Supply: -5V  and +30.6V

LDO(2A) connects over 100 opeamps(OPA2170 and OPA2196)

Best Regards,