5.1 Data Readback Overhead

The FDC2214 does not retain its conversion results when in sleep mode. Because of this, the device cannot be put into the sleep state until the channel conversion measurements have been read by the microcontroller. Therefore, the data registers must be read while the device is still running in active mode which results in a fixed power consumption overhead. From the data given in Table 4, the data readback time is 0.688 ms. This overhead has a greater impact on conversion times in that order of magnitude, in this instance, at lower RCOUNT values where the data conversion times are less than 10x the data readback time.