46.6 Peripherals Power Consumption

Use the table below when calculating the additional current consumption for the different I/O peripherals in various operating modes. Some peripherals will request the clock to be enabled when operating in STANDBY. Refer to the peripheral section for further information.

Table 46-5. Peripheral Power Consumption⁽¹⁾
Operating Conditions: -40°C ≤ T_A ≤ +125°C (typ. +25°C) V_DD = V_DDIO2 = 3.0V OSCHF at 4 MHz used as clock source Device in Standby sleep mode
Symbol	Description	Min.	Typ. ✝	Max. 85°C	Units	Conditions
I_{DD_WDT}	Watchdog Timer (WDT)	-	0.5	-	µA	With 32.768 kHz Internal Oscillator
I_{DD_MVIO}	Multi-Voltage I/O (MVIO)	-	0.5	-	µA	Dual supply configuration
I_{DD_VREF}	Voltage Reference (VREF)	-	175	-	µA	ADC0REF enabled, V_REF = 2.048V Excluding bandgap
		-	36	-	µA	ACREF enabled, V_REF = 2.048V Excluding bandgap
		-	28	-	µA	DACREF enabled, V_REF = 2.048V Excluding bandgap
I_{DD_BOD}	Brown-out Detector (BOD)	-	17	-	µA	Brown-out Detect (BOD) continuous Including bandgap
		-	1.6	-	µA	Brown-out Detect (BOD) sampling @128 Hz, including I_{DD_OSC32K} Including bandgap
		-	0.95	-	µA	Brown-out Detect (BOD) sampling @32 Hz, including I_{DD_OSC32K} Including bandgap
I_{DD_BG}	Bandgap	-	13	-	µA
I_{DD_VMON}		-	18	-	µA
I_{DD_TCA}	16-bit Timer/Counter Type A (TCA)	-	6	-	µA	CLK_PER = HFOSC/4 = 1 MHz
I_{DD_TCB}	16-bit Timer/Counter Type B (TCB)	-	3.6	-	µA
I_{DD_TCD}	12-bit Timer/Counter Type D (TCD)	-	4.5	-	µA
I_{DD_RTC}	Real-Time Counter (RTC)	-	0.7	-	µA	CLK_RTC = 32.768 kHz Internal Oscillator
		-	3.9	-	µA	RTC running at 1.024 kHz from XOSC32K, XOSC32KCTRLA.LPMODE = 0
		-	2.1	-	µA	RTC running at 1.024 kHz from XOSC32K, XOSC32KCTRLA.LPMODE = 1
I_{DD_OSCHF}	Internal High-Frequency Oscillator (OSCHF)	-	160	-	µA	Internal Oscillator running at 4 MHz
I_{DD_XOSCHF}	High Frequency Crystal Oscillator (XOSCHF)	-	360	-	µA	24 MHz XTAL, C_L = 15 pF
I_{DD_OSC32K}	32.768 kHz Internal Oscillator (OSC32K)	-	0.3	-	µA
I_{DD_XOSC32K}	32.768 kHz Crystal Oscillator (XOSC32K)	-	2.5	-	µA	XOSC32KCTRLA.LPMODE = 0, C_L = 9 pF
I_{DD_XOSC32K}	32.768 kHz Crystal Oscillator (XOSC32K)	-	0.5	-	µA	XOSC32KCTRLA.LPMODE = 1, C_L = 9 pF
I_{DD_ADC}	Analog-to-Digital Converter (ADC)	-	-	-	µA	ADC - Non-converting
I_{DD_ADC}	Analog-to-Digital Converter (ADC)	-	320	-	µA	ADC @80 ksps⁽²⁾
I_{DD_AC}	Analog Comparator (AC)	-	70	-	µA	CTRLA.POWER = 0x0
		-	17	-	µA	CTRLA.POWER = 0x1
		-	12	-	µA	CTRLA.POWER = 0x2
I_{DD_DAC}	Digital-to-Analog Converter (DAC)	-	120	-	µA	DAC + DACOUT, V_DACREF = V_DD
I_{DD_DAC}	Digital-to-Analog Converter (DAC)	-	8	-	µA	DAC, V_DACREF = V_DD
I_{DD_USART}	Universal Synchronous and Asynchronous Receiver and Transmitter (USART)	-	8.2	-	µA	USART Enabled @9600 Baud
I_{DD_SPI}	Serial Peripheral Interface (SPI)	-	4	-	µA	SPI Host @100 kHz
I_{DD_TWI}	Two-Wire Interface (TWI)	-	8	-	µA	TWI Host @100 kHz
I_{DD_TWI}	Two-Wire Interface (TWI)	-	6	-	µA	TWI Client @100 kHz
I_{DD_NVM_ERASE}	Flash Programming Erase	-	5.1	-	mA
I_{DD_NVM_WRITE}	Flash Programming Write	-	6	-	mA
I_{DD_ZCD}	Zero Cross Detector (ZCD)	-	10	-	µA	Excluding sink/source currents
✝ Unless otherwise specified, data in the “Typ.” column is at T_A = 25°C and V_DD = 3.0V. These parameters are not tested and are for design guidance only. Note: Current consumption of the module only. To calculate the total internal power consumption of the microcontroller, add the power consumption values of all the peripherals and the clock sources used to the base power consumption given in the Power Consumption section. Average power consumption with ADC active in Free Running mode.