Current Consumption - Silicon Laboratories UG464 User Manual

2.2 Current Consumption

The table below summarizes the data sheet current consumption of the various components on the board. The operating current of the
board greatly depends on the application. The number of enabled sensors, how often they are sampled and how often the radio is
transmitting or receiving are examples of factors that influence the operating current. In many cases the given conditions differ from the
operating conditions on the Thunderboard EFR32BG22, but the table can still be used as an indication of how much each feature con-
tribute to the total current consumption. More details can be found in the specific data sheet for each device.
Parameter
EFR32BG22 Current Con-
1
sumption
Ambient Light Sensor Cur-
2
rent Consumption
RH/Temp Sensor Current
3
Consumption
Hall Effect Magnetic Sensor
4
Current Consumption
Microphone Current Con-
5
sumption
6
IMU Current Consumption
Serial Flash Memory Cur-
7
rent Consumption
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Table 2.2. Current Consumption
Symbol
I MCU current consumption in EM0 mode with all peripher-
EFR32
als disabled (dc-dc converter at 3.0 V input and 1.8 V out-
put, VSCALE1, 38.4 MHz crystal, CPU running Prime from
flash at 25 ˚C)
EM4, no BURTC, no LF oscillator
Radio system current consumption in receive mode, active
packet reception (dc-dc converter at 3.0 V input and 1.8 V
output, MCU in EM1 and all MCU peripherals disabled,
HCLK = 38.4 MHz, 1Mbit/s, 2GFSK, f = 2.4 GHz,
VSCALE1 at 25 ˚C)
Radio system current consumption in transmit mode (dc-
dc converter at 3.0 V input and 1.8 V output, MCU in EM1
and all MCU peripherals disabled, HCLK = 38.4 MHz, f =
2.4 GHz, CW, 6 dBm output power, VSCALE1 at 25 ˚C)
I Shutdown at 1.8 V
VEML6035
Operation mode at 1.8 V (ALS only)
I Standby, -40 to +85˚C
Si7021
RH conversion in progress
Temperature conversion in progress
Peak I during I
DD
I Sleep mode at 3.3 V
DD
Average current for periodic activation at 3.3 V, sleep tim-
er enabled, 200 msec sleep time
Conversion in progress at 3.3 V
I Sleep mode current (Fclock = 0 Hz, VDD = 3.6 V)
MIC
Supply current in performance mode (V
= 2.4 MHz)
I Full-chip sleep mode at 1.8 V supply
IMU
Gyroscope Only, 102.3 Hz update rate at 1.8 V supply
Accelerometer only, 102.3 Hz update rate at 1.8 V supply
Gyroscope + Accelerometer, 102.3 Hz update rate at 1.8
V supply
I Deep power-down current in ultra low power mode at 1.8
Flash
V
Standby current in ultra low power mode at 1.8 V
Write status register current in ultra low power mode at 1.8
V
UG464: Thunderboard™ EFR32BG22 User's Guide
Condition
2
C operations
= 3.6 V, Fclock
DD
Specifications
Typ Unit
28 µA/MHz
0.17 µA
3.8 mA
8.4 mA
0.5 µA
170 µA
0.06 µA
150 µA
90 µA
3.5 mA
50 nA
0.4 µA
5 mA
26 µA
700 µA
8 µA
1.23 mA
68.9 µA
1.27 mA
0.007 µA
5 µA
3.1 mA
Rev. 1.0 | 7