Analog Input >> General Properties >> Advanced >> Sample and Hold Enable

NI-DAQmx C Properties

Analog Input >> General Properties >> Advanced >> Sample and Hold Enable

Data Type: bool32
Description: Specifies whether to enable the sample and hold circuitry of the device. When you disable sample and hold circuitry, a small voltage offset might be introduced into the signal. You can eliminate this offset by using Auto Zero Mode to perform an auto zero on the channel.

You can get/set/reset this property using:
  DAQmxGetAISampAndHoldEnable
  DAQmxSetAISampAndHoldEnable
  DAQmxResetAISampAndHoldEnable