Datasheet

ATmega48A/PA/88A/PA/168A/PA/328/P
 2018 Microchip Technology Inc. Data Sheet Complete DS40002061A-page 507
It is possible to calculate the typical current consumption based on the numbers from Table 31-15 for other V
CC
and frequency settings than listed in Table 31-16.
31.8.3.1 Example
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled at V
CC
= 2.0V
and F = 1MHz. From Table 31-16, third column, we see that we need to add 14.5% for the TIMER1, 22.1% for
the ADC, and 15.7% for the SPI module. Reading from Figure 31-338 on page 504, we find that the idle current
consumption is ~0.055 mA at V
CC
= 2.0V and F = 1MHz. The total current consumption in idle mode with
TIMER1, ADC, and SPI enabled, gives:
31.8.4 Power-down Supply Current
Figure 31-342. ATmega328P: Power-Down Supply Current vs. V
CC
(Watchdog Timer Disabled)
PRTIM0 0.9% 4.8%
PRSPI 2.9% 15.7%
PRADC 4.1% 22.1%
Table 31-16. ATmega328P: Additional Current Consumption (percentage) in Active and Idle mode (Continued)
PRR bit
Additional Current consumption
compared to Active with external
clock (see Figure 31-332 on page
501 and Figure 31-333 on page
502)
Additional Current consumption
compared to Idle with external
clock (see Figure 31-337 on page
504 and Figure 31-338 on page
504)
ICCtotal 0.045 mA (1 + 0.145 + 0.221 + 0.157) 0.069 mA
105°C
85°C
25°C
-40°C
0
0.5
1
1.5
2
2.5
3
1.5 2 2.5 33.5 4 4.5 5 5.5
V
CC
(V)
I
CC
(µA)