This graph shows two plots of the average current consumption over one connection interval for various sleep times ranging from 2 to 20s. These per cycle average values are computed from a BLE SoC sleep current of 1.8µA, a radio Receive power of 9.3mA, a transmit power of 9mA, and an average ON-time base-band processing current of around 5mA.  Irrespective of the sleep clock accuracy, the average current per cycle decreases with sleep time. As expected from the power savings model, a tighter sleep clock accuracy of 5ppm achieves 30% power savings over a 200ppm sleep clock. Sleep times greater than 8 s are not achievable due to unacceptable current drain, which is a result of the radio receiver window widening in systems using 32kHz crystals as sleep clock references. Wearables and IoT devices that do not need to transmit data at less than 8s intervals, can extend their power savings beyond 30% using 5-ppm 32kHz oscillators as the BLE sleep clock.