Data Sheet

ICM-20948
Document Number: DS-000189 Page 26 of 89
Revision: 1.3
4.19 DIGITAL-OUTPUT TEMPERATURE SENSOR
An on-chip temperature sensor and ADC are used to measure the ICM-20948 die temperature. The readings from the
ADC can be read from the FIFO or the Sensor Data registers.
4.20 BIAS AND LDOS
The bias and LDO section generates the internal supply and the reference voltages and currents required by the ICM-
20948. Its two inputs are an unregulated VDD and a VDDIO logic reference supply voltage. The LDO output is bypassed
by a capacitor at REGOUT. For further details on the capacitor, please refer to the Bill of Materials for External
Components.
4.21 CHARGE PUMP
An on-chip charge pump generates the high voltage required for the MEMS oscillators.
4.22 POWER MODES
Table 12 lists the user-accessible power modes for ICM-20948.
MODE
NAME
GYRO
ACCEL
MAGNETOMETER
DMP
1
Sleep Mode
Off
Off
Off
Off
2
Low-Power Accelerometer Mode
Off
Duty-Cycled
Off
On or Off
3
Low-Noise Accelerometer Mode
Off
On
Off
On or Off
4
Gyroscope Mode
On
Off
Off
On or Off
5
Magnetometer Mode
Off
Off
On
On or Off
6
Accel + Gyro Mode
On
On
Off
On or Off
7
Accel + Magnetometer Mode
Off
On
On
On or Off
8
9-Axis Mode
On
On
On
On or Off
Table 12. Power Modes for ICM-20948