The Raspberry Pi does not have analog ports. So you use Pulse Width Modulation. 

You want a 1.6V signal on a Raspberry Pi 3.3V GPIO.   It would be approximately, 50% duty cycle or 3.3V * 50% = 1.65V.   You can setup an instance like

classgpiozero.PWMLED(pin*active_high=Trueinitial_value=0frequency=100pin_factory=None)[source]