SBOS859B March 2018 – July 2018 INA1620
To minimize the possibility of output transients that might produce an audible click or pop, ramp the supply voltages for the INA1620 symmetrically to their nominal values. Asymmetrical supply ramping can cause output transients during power up that can be audible in headphone applications. If possible, hold the EN pin low while the power supplies are ramping up or down. If the EN pin is not being independently controlled (for example, by a GPIO pin), use a voltage divider to hold the enable pin voltage below the logic-high threshold until the power supplies reach the specified minimum voltage, as shown in Figure 50.