I am building a sample and hold circuit for use in a SAR ADC and it has been suggested I use DG212 for the switch. I've attached the pinout diagram for this chip. I know S and D are for the signal path and IN is for the switch control signal. I'm just somewhat confused by V+, V-, GND, and VL. The data sheet says a VL supply is not required, but I don't know what it's for though. The supply voltage for the whole sample and hold circuit will be 0-5V. Can someone clarify V-, GND, and VL for me please?
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