User's Manual

Atmel AVR2092
29
8427A-AVR-10/11
7 Electrical characteristics
7.1 Absolute maximum ratings
Stresses beyond the values listed in Table 7-1 may cause permanent damage to the
board. This is a stress rating only and functional operation of the device at these or
any other conditions beyond those indicated in the operational sections of this manual
are not implied. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability. For more details about these parameters, refer to
individual datasheets of the components used.
Table 7-1. Absolute maximum ratings.
No. Parameter Condition Minimum Typical Maximum Unit
7.1.1 Storage temperature range -40 +85 °C
7.1.2 Humidity Non-condensing 90 % r.H.
7.1.3 Supply voltage -0.3 +3.6 V
7.1.4 EXT I/O pin voltage -0.3 Vcc + 0.3 V
7.1.5 Supply current from batteries Sum over all power pins -0.5 A
7.1.6 Battery charge current
(1)
0 mA
Note: 1. Keep power switch off or remove battery from REB-CBB when external power is supplied.
7.2 Recommended operating range
Table 7-2. Recommended operating range.
No. Parameter Condition Minimum Typical Maximum Unit
7.2.1 Operating temperature range -20 +70 °C
7.2.2 Plain REB-CBB 1.6 3.0 3.6 V
7.2.3 REB plugged on REB-CBB 1.6 3.0 3.6 V
7.2.4
Supply voltage (Vcc)
Serial flash access in usage 2.3 3.0 3.6 V
7.3 Current consumption
Test conditions (unless otherwise stated):
V
DD
= 3.0V, T
OP
= 25°C
Table 7-3 li
sts current consumption values for typical scenarios of a complete system
composed of REB-CBB and REB232. The Zener diode has been removed as
described above.
Table 7-3. Current consumption of REB-CBB populated with REB232.
No. Parameter Condition Minimum Typical Maximum Unit
7.3.1 Supply current
MCU @ power down,
transceiver in state SLEEP,
serial flash in Deep-Sleep
17 µA
7.3.2 Supply current
MCU @ 2MHz,
transceiver in state TRX_OFF
3 mA
7.3.3 Supply current
MCU @ 16MHz (int. RC 32MHz),
transceiver in state TRX_OFF
15 mA