ATMEGA325-16AJ ATMEL [ATMEL Corporation], ATMEGA325-16AJ Datasheet - Page 292

• Manufacturer Part Number: ATMEGA325-16AJ
• Description: 8-bit Microcontroller with In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

ATmega325/3250/645/6450 Typical Characteristics – Preliminary Data
Active Supply Current
292
ATmega325/3250/645/6450
The following charts show typical behavior. These figures are not tested during manu-
facturing. All current consumption measurements are performed with all I/O pins
configured as inputs and with internal pull-ups enabled. A sine wave generator with rail-
to-rail output is used as clock source.
All Active- and Idle current consumption measurements are done with all bits in the PRR
register set and thus, the corresponding I/O modules are turned off. Also the Analog
Comparator is disabled during these measurements. See “Power Reduction Register”
on page 35 for details.
The power consumption in Power-down mode is independent of clock selection.
The current consumption is a function of several factors such as: operating voltage,
operating frequency, loading of I/O pins, switching rate of I/O pins, code executed and
ambient temperature. The dominating factors are operating voltage and frequency.
The current drawn from capacitive loaded pins may be estimated (for one pin) as
C
ing frequency of I/O pin.
The parts are characterized at frequencies higher than test limits. Parts are not guaran-
teed to function properly at frequencies higher than the ordering code indicates.
The difference between current consumption in Power-down mode with Watchdog
Timer enabled and Power-down mode with Watchdog Timer disabled represents the dif-
ferential current drawn by the Watchdog Timer.
Figure 132. Active Supply Current vs. Frequency (0.1 - 1.0 MHz)
L
*
V
CC
1.8
1.6
1.4
1.2
0.8
0.6
0.4
0.2
*f where C
2
1
0
0
0.1
L
= load capacitance, V
0.2
ACTIVE SUPPLY CURRENT vs. FREQUENCY
0.3
0.4
Frequency (MHz)
0.1 - 1.0 MHz
CC
0.5
= operating voltage and f = average switch-
0.6
0.7
0.8
0.9
2570A–AVR–09/04
1
5.5V
5.0V
4.5V
4.0V
3.3V
2.7V
1.8V