The ADA4062-2 data sheet is specified with dual supply Vsy = +/-15V. Can I operate it on 30V and GND instead?
All op amps can be used with single or dual polarity supplies. The op amp does not know where ground is; it only knows where each pin is in relation to other pins. So, for an op amp specified on +/-15V, you can run it on gnd and +30V, or even +10V and +40V, as long as you keep the inputs and outputs within the supply rails. Check the data sheet for the input voltage range (IVR) and output swing to make sure that the op amp fits the requirements of the application.
From the data sheet, the op amp requires a 3.5V headroom from the lower supply rail to bias the input stage. Input voltage range for supplies of +30V and gnd is therefore 3.5V to 30V. The same principle applies to the output swing. Output swing for 10Kohm load to Vcm over temperature is 2.5V to 27.5V.
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