38.6 Peripherals Power Consumption

The table below can be used 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. Refer to the peripheral section for further information.

Table 38-6. Peripherals Power Consumption(1)
Operating Conditions:
  • VDD = VDDIO2 = 3.0V
  • TA = 25°C
  • OSCHF at 4 MHz used as clock source
  • Device in Standby sleep mode
Symbol Description Min. Typ. Max. Units Conditions
IDD_WDT Watchdog Timer (WDT) — 600 — nA 32.768 kHz internal oscillator
IDD_MVIO Multi-Voltage I/O (MVIO) — 600 — nA Dual supply configuration
IDD_VREF Voltage Reference (VREF) — 160 — μA ADC0REF enabled, VREF = 2.048V
— 71 — μA ACREF enabled, VREF = 2.048V
— 40 — μA DACREF enabled, VREF = 2.048V
IDD_BOD Brown-out Detector (BOD) — 17 — μA Brown-out Detect (BOD) continuous
— 800 — nA Brown-out Detect (BOD) sampling @128 Hz, including IDD_OSC32K
— 600 — nA Brown-out Detect (BOD) sampling @32 Hz, including IDD_OSC32K
IDD_TCA 16-bit Timer/Counter Type A (TCA) — 6.3 — μA

HFOSC = 4 MHz,
CLK_PER = HFOSC/4 = 1 MHz
IDD_TCB 16-bit Timer/Counter Type B (TCB) — 3.7 — μA
IDD_TCD 12-bit Timer/Counter Type D (TCD) — 5.3 — μA
IDD_RTC RTC — 820 — nA CLK_RTC = 32.768 kHz Internal Oscillator
IDD_OSCHF Internal High Frequency Oscillator (OSCHF) — 150 — μA OSCHF at 4 MHz
IDD_XOSCHF High Frequency Crystal Oscillator (XOSCHF) — 350 — μA 20 MHz XTAL, CL = 15 pF
IDD_OSC32K 32.768 kHz Internal Oscillator (OSC32K) — 510 — nA
IDD_XOSC32K 32.768 kHz Crystal Oscillator (XOSC32K) — 2.4 — μA

XOSC32KCTRLA.LPMODE = 0,
CL = 9 pF

— 580 — nA

XOSC32KCTRLA.LPMODE = 1,
CL = 9 pF

IDD_ADC Analog-to-Digital Converter (ADC) — 67 — nA ADC - Nonconverting
— 680 — μA ADC @60 ksps(2)
— 700 — μA ADC @120 ksps(2)
IDD_AC Analog Comparator (AC) — 70 — μA CTRLA.POWER = 0x0
— 17 — μA CTRLA.POWER = 0x1
— 12 — μA CTRLA.POWER = 0x2
IDD_DAC Digital-to-Analog Converter (DAC) — 120 — μA DAC + DACOUT, VDACREF = VDD/2
— 8.6 — μA DAC, VDACREF = VDD/2
IDD_USART Universal Synchronous and Asynchronous Receiver and Transmitter (USART) — 36 — μA USART Enabled @9600 Baud
IDD_SPI Serial Peripheral Interface (SPI) — 2.1 — μA SPI Host @100 kHz
IDD_TWI Two-Wire Interface (TWI) — 24 — μA TWI Host @100 kHz
— 17 — μA TWI Client @100 kHz
IDD_NVM_ERASE Flash Programming Erase — 1.5 — mA
IDD_NVM_WRITE Flash Programming Write — 3 — mA
Note:
  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. Average power consumption with ADC active in Free-Running mode.