In cases, where the burden on microcontroller needs to be reduced , digital 3D Hall sensors like the TMAG3001, TMAG5273 and TMAG5170 provide multiple power modes with different current levels to reduce the system power consumption. Table 2-1 outlines the different power modes available for TMAG5273

and TMAG3001.

Based on the system level power constraints and the required output data rate, TMAG5273 can be placed in any one of the power modes. When placed in the wake-up and sleep mode, the sensor is self duty cycled, based on the user configured sleep interval. For applications such as thumb sticks, where angle measurements are needed to determine the direction and magnitude, the users can configure the TMAG5273 to measure more than one axis data, every time the device wakes up. To calculate the average current consumption, the conversion time, t_measure for 1, 2 or 3 channels and the sleep time, t_sleep is needed. The average current consumption , I_{cc_average} can be then calculated for TMAG5273 using Equation 2.

where,

• I_cc,active is the active current consumed during conversion typically about 2.3 mA
• T_measure is the time taken to convert the selected channels typically about 50 us for 1channel, 75us for 2 channels and 100 us for 3 channels
• I_{DCM_sleep} refers to the current consumed during wake-up and sleep mode (also known as the Duty Cycle Mode)
• T_sleep is the time that the sensor remains in the sleep portion of the Wake up and Sleep mode
• I_standby refers to the current consumed during standby mode
• T_{start_sleep} is the time the device takes to transition from the sleep portion of the duty cycle mode to the standby state. The typical value is 50 μs.
• T_{start_measure} is the time the device takes to transition from the standby state to the active conversion mode

Table 2-2 shows the average power consumption during wake-up and sleep mode with an interval of 1-ms and 20-s.