A d v a nce d I n fo rm a t i o n

Eterna Datasheet

Linear Technology / Dust Networks

17

7.0

Recommended Operating Conditions

Table 4

Recommended Operation Conditions

Parameter

Conditions

Min

Typ

Max

Units

VSUPPLY range

Including noise and load regulation

2.1

3.6

3.76

V

Voltage supply noise

Requires recommended RLC filter,

50 Hz to 2 MHz

250

Operating temperature range

–40

+85

°C

Operating relative humidity

Non-condensing

10

90

% RH

Power on Reset threshold

1.5

V

Temperature ramp

-8

+8

°C/min

8.0

Electrical Characteristics

8.1

Radio Specifications

The following characteristics are measured with VSUPPLY = 3.6 V at 25 °C, unless otherwise specified.

Table 5

Detailed Radio Specifications

Parameter

Conditions

Min

Typ

Max

Units

Frequency Band

As specified by [ 1 ]

2.4000

2.4835

GHz

Number of channels

15

Channel separation

As specified by [ 1 ]

5

MHz

Occupied channel bandwidth

At –20 dBc

2.7

MHz

Channel Center Frequency

Where k = 11 to 25.‡

2405 +

5 * (k-11)

MHz

Modulation

IEEE 802.15.4 DSSS

Raw data rate

As specified by [ 1 ]

250

kbps

Range*

Indoor

†

Outdoor

†

Free space

25 °C, 50% RH, +2 dBi

omni-directional antenna

100

300

1200

m

m

m

* Actual RF range performance is subject to a number of installation-specific variables including, but not restricted to

ambient temperature, relative humidity, presence of active interference sources, line-of-sight obstacles, and near-

presence of objects (for example, trees, walls, signage, and so on) that may induce multipath fading. As a result, actual

performance varies.

†

1 meter above ground.

‡ Channel 26 as specified by [ 1 ] is not used..

8.2

DC Characteristics

The following characteristics are measured with VSUPPLY = 3.6 V at 25 °C, unless otherwise specified.

Table 6

DC Specifications

Parameter

Conditions

Min

Typ

Max

Units

Reset

After power-on reset

1.2

µA

Deep Sleep

0.8

µA

Doze

RAM on; ARM Cortex-M3, flash, radio,

and peripherals off, all data and state

retained, 32.768 kHz reference active

1.2

µA

Serial Flash Emulation

20

mA

Peak Operating current

System operating at 14.7 MHz

Radio Tx

Flash Write

at +8 dBm output power

30

mA