Peripherals Power Consumption

Use the table below to calculate the additional current consumption for the different I/O peripherals in the various operating modes.

Some peripherals will request the clock to be enabled when operating in STANDBY. See the peripheral chapter for further information.

Operating conditions:

V_DD = 3V
T = 25°C
OSC20M at 1 MHz used as the system clock source, except where otherwise specified
In Idle sleep mode, except where otherwise specified

Table 1. Peripherals Power Consumption
Peripheral	Conditions	Typ.⁽¹⁾	Unit
BOD	Continuous	19	µA
BOD	Sampling @ 1 kHz	1.2	µA
TCA	16-bit count @ 1 MHz	13.0	µA
TCB	16-bit count @ 1 MHz	7.4	µA
RTC	16-bit count @ OSCULP32K	1.2	µA
WDT (including OSCULP32K)		0.7	µA
OSC20M		130	µA
AC	Fast mode⁽²⁾	92	µA
AC	Low-Power mode⁽²⁾	45	µA
ADC⁽³⁾	50 ksps	330	µA
ADC⁽³⁾	100 ksps	340	µA
XOSC32K	C_L = 7.5 pF	0.5	µA
OSCULP32K		0.4	µA
USART	Enable @ 9600 Baud	13.0	µA
SPI (Host)	Enable @ 100 kHz	2.1	µA
TWI (Host)	Enable @ 100 kHz	24.0	µA
TWI (Client)	Enable @ 100 kHz	17.0	µA
Flash programming	Erase Operation	1.5	mA
Flash programming	Write Operation	3.0	mA

Notes:

1.Current consumption of the module only. To calculate the total internal power consumption of the microcontroller, add this value to the base power consumption given in the “Power Consumption” section in electrical characteristics.
2.CPU in Standby mode.
3.Average power consumption with ADC active in Free-Running mode.