Datasheet

175
2586D–AVR–02/06
ATtiny25/45/85
It is possible to calculate the typical current consumption based on the numbers from Table 2 for
other V
CC
and frequency settings than listed in Table 1.
25.2.0.1 Example 1
Calculate the expected current consumption in idle mode with USI, TIMER0, and ADC enabled
at V
CC
= 2.0V and F = 1MHz. From Table 25-4 on page 171, third column, we see that we need
to add 6.4% for the USI, 21.4% for the ADC, and 7.3% for the TIMER0 module. Reading from
Figure 25-7, we find that the idle current consumption is ~0,1mA at V
CC
= 2.0V and F = 1MHz.
The total current consumption in idle mode with USI, TIMER0, and ADC enabled, gives:
25.3 Power-down Supply Current
Figure 25-11. Power-down Supply Current vs. V
CC
(Watchdog Timer Disabled)
IC
Ctotal
0.1
mA
1 0.064 0.073 0.214+++
()•
0.135
m
A
≈≈
POWER-DOWN SUPPLY CURRENT vs. V
CC
WATCHDOG TIMER DISABLED
85 ˚C
25 ˚C
-40 ˚C
0
0,5
1
1,5
2
2,5
1,5 2 2,5 3 3,5 4 4,5 5 5,5
V
CC
(V)
I
CC
(uA)