saturation input signal (1) (for analog signal applications of a charge-transfer device)

The maximum input signal or illumination power that can be transferred with a specified degree of linearity.

(2) (for digital signal applications of a charge-transfer device): The input signal or illumination power that is required to produce full-well-capacity charge packets.

References: 

JESD99B, 5/07

JESD99B, 5/07