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Inconsistency with data sheet and spice model - LTC3779

Category: Datasheet/Specs
Product Number: LTC3779
Data sheet specifies the pins of IAVGSNSP and IAVGSNSN source 10-15uA when the common mode voltage is approximately. 4V. Data sheet also specifies that the bias current decreases to approximately -300uA when common mode is 0V. This disagrees with the spice model. At 0V the spice model sources +300uA.
The current direction does not agree. What is the direction of bias current in the hardware?