4.1 Measurements with Gated Clock

The TIDA-00466 was programmed so that the FDC2214 was only operating in one of three states: active, sleep, and shutdown. For each state, the current consumption of the device was measured and compared to the expected values given in the data sheet.

These supply current values are taken with a gated external reference clock. If the clock is not turned off while the FDC2214 is in sleep or shutdown mode, the power consumption in these modes will significantly increase as seen in Table 3. The clocking transitions result in an increase of the FDC2214 input pin leakage currents, which is negligible when compared to the normal mode current, but is significant when added onto the lower power mode currents.