LDC1612: Current Consumption Using Internal Reference Clock

I have done a very simple sensor design with the LDC1612 using both channels and am seeing much higher current consumption than the data sheet would suggest.  The part is drawing about 20mA of current.  According to the data sheet, the sensor should draw 2.1 mA + the additional coil driving current (in my case should be 342µA per channel times 2 per my settings).  The data sheet is confusing as it lists fCLKIN = 10 MHz for the test conditions, but the foot note (6) indicate fCLKIN = 40MHz.  I am using the internal reference clock in my design.  My power budget was for 5mA.  Is this current normal when using the internal reference oscillator?