Calibrated Internal RC Oscillator Accuracy

Table 1. Calibration Accuracy of Internal RC Oscillator
  Frequency VCC Temperature Calibration Accuracy
Factory
 Calibration 8.0MHz 3.0V 25°C ±10%
User
 Calibration 7.3 - 8.1MHz

1.8V - 5.5V(1)
2.7V - 5.5V(2)

 -40°C to - 85°C ±1%
Note:
  1. Voltage range for ATmega48V/88V/168V .
  2. Voltage range for ATmega48/88/168 .
Parent topic: Clock Characteristics