39.6 Peripherals Power Consumption
Use the table below to calculate the additional current consumption for the different I/O peripherals in various operating modes. Some peripherals will request the clock to be enabled when in STANDBY. Refer to the peripheral section for further information.
Operating Conditions:
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| Symbol | Description | Min. | Typ.✝ | Max. | Unit | Conditions |
| IDD_WDT | Watchdog Timer (WDT) | — | 0.5 | 1.5 | μA | With 32.768 kHz Internal Oscillator |
| IDD_MVIO | Dual supply configuration, Multi-Voltage I/O (MVIO) | — | 0.5 | — | μA | |
| IDD_VREF | Voltage Reference (VREF) | — | 175 | 320 | μA | ADC0REF enabled, VREF = 2.048V |
| — | 71 | 92 | μA | ACREF enabled, VREF = 2.048V | ||
| — | 40 | 62 | μA | DACREF enabled, VREF = 2.048V | ||
| IDD_BOD | Brown-out Detector (BOD) | — | 17 | 27 | μA | Brown-out Detect (BOD) continuous |
| — | 1.6 | 12 | μA | Brown-out Detect (BOD) sampling @128 Hz, including IDD_OSC32K | ||
| — | 0.95 | 12 | μA | Brown-out Detect (BOD) sampling @32 Hz, including IDD_OSC32K | ||
| IDD_TCA | 16-bit Timer/Counter Type A (TCA) | — | 6 | — | μA | CLK_PER = HFOSC/4 = 1 MHz |
| IDD_TCB | 16-bit Timer/Counter Type B (TCB) | — | 3.6 | — | μA | |
| IDD_TCD | 12-bit Timer/Counter Type D (TCD) | — | 4.5 | — | μA | |
| IDD_RTC | Real-Time Counter (RTC) | — | 0.7 | 2 | μA | CLK_RTC = 32.768 kHz Internal Oscillator |
| — | 3.9 | — | μA |
RTC running at 1.024 kHz from XOSC32K |
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| — | 2.1 | — | μA |
RTC running at 1.024 kHz from XOSC32K |
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| IDD_OSCHF | Internal High-Frequency Oscillator (OSCHF) | — | 160 | — | µA | Internal Oscillator running at 4 MHz |
| IDD_XOSCHF | High Frequency Crystal Oscillator (XOSCHF) | — | 360 | — | μA | 24 MHz XTAL, CL = 15 pF |
| IDD_OSC32K | 32.768 kHz Internal Oscillator (OSC32K) | — | 0.3 | 1.5 | μA | |
| IDD_XOSC32K | 32.768 kHz Crystal Oscillator (XOSC32K) | — | 2.5 | — | μA |
XOSC32KCTRLA.LPMODE = 0 |
| — | 0.5 | — | μA |
XOSC32KCTRLA.LPMODE = 1 |
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| IDD_AC | Analog Comparator (AC) | — | 70 | 130 | μA | CTRLA.POWER = 0x0 |
| — | 17 | 35 | μA | CTRLA.POWER = 0x1 |
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| — | 12 | 33 | μA | CTRLA.POWER = 0x2 |
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| IDD_OPAMP | Analog Signal Conditioning (OPAMP) | — | 1.0 | — | mA | One OPAMP in voltage follower mode, VCM = VDD/2, IRSEL = 0 |
| — | 0.75 | — | mA | One OPAMP in voltage follower mode, VCM = VDD/2, IRSEL = 1 |
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| IDD_DAC | Digital-to-Analog Converter (DAC) | — | 120 | 180 | μA | DAC + DACOUT, VDACREF = VDD/2 |
| — | 8 | 34 | μA | DAC, VDACREF = VDD/2 | ||
| IDD_USART | Universal Synchronous and Asynchronous Receiver and Transmitter (USART) | — | 8.2 | — | μA | USART Enabled @9600 Baud |
| IDD_SPI | Serial Peripheral Interface (SPI) | — | 4 | — | μA | SPI Host @100 kHz |
| IDD_TWI | Two-Wire Interface (TWI) | — | 8 | — | μA | TWI Host @100 kHz |
| — | 6 | — | μA | TWI Client @100 kHz | ||
| IDD_NVM_ERASE | Flash Programming Erase | — | 5.1 | — | mA | |
| IDD_NVM_WRITE | Flash Programming Write | — | 6.0 | — | mA | |
| IDD_ZCD | Zero Cross Detector (ZCD) | — | 10 | — | μA | Excluding sink/source currents |
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✝ Data found in the “Typ.” column is at TA = 25°C and VDD = 3.0V unless otherwise specified. These parameters are for design guidance only and are not tested. Note:
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