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AD5560 current consumption

Hello,

   We meet an issue when we test AD5560 by below circuit. Attach picture is the test equipment.

   System control register 0x1 is set to 0001 0010 0000 0000

   DPS Register 1 0x2 is set to 1010 0010 0110 0000,

    And we change Current range bit [13:11], We find SENSE PIN of AD5560 will consume the corresponding current, Such as 5uA, 25uA, 250uA….

    When the RESET pin is set to low level, SENSE PIN of AD5560 would consume about 2uA current.

     This will cause we can’t test some low current load I/O or add the error. Would you pls. advise how we can optimize this problem ? thanks