6

Dust Networks

LTP5900 Mote Datasheet

Parameter

Min

Typ

Max

Units

Comments

Range*

Power amplifier enabled:

Indoor

†

100

m

Outdoor

†

300

m

25 °C, 50% RH, +2 dBi

omni-directional antenna

Free space

1200

m

Power amplifier disabled:

Indoor

†

25

m

Outdoor

†

200

m

Free space

350

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, near-presence

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

performance varies for each instance.

4.2

Antenna Specifications

A MMCX-compatible male connector is provided on board for the antenna connection. The antenna must meet specifications

in Table 7. For a list of FCC-approved antennae, see section 10.1.2.

Table 7

Antenna Specifications

Parameter

Value

Frequency range

2.4 – 2.4835 GHz

Impedance

50

Ω

Maximum VSWR

3:1

Connector

MMCX*

* The LTP5900 can accommodate the following RF mating connectors:

• MMCX straight connector such as Johnson 135-3402-001, or equivalent

• MMCX right angle connector such as Tyco 1408149-1, or equivalent

When the mote is placed inside an enclosure, the antenna should be mounted such that the radiating portion of the antenna

protrudes from the enclosure. The antenna should be connected using a MMCX connector on a coaxial cable. For optimum

performance, the antenna should be positioned vertically when installed.

5.0

Pinout

The LTP5900 has two 11-pin Samtec MTMM-111-04-S-S-175-3 (or equivalent) connectors on the bottom side for handling

all of the I/O. The third pin in each of the connectors is not populated, and serves as a key for alignment. The connectors are

mounted on opposite edges of the long axis of the LTP5900.

5.1

LTP5900 Pinout

The LTP5900 provides a bidirectional flow-controlled serial interface (see section 8.3 Settable I/O Modes).

Table 8

LTP5900 Pin Functions

Pin

Number

Pin Name

Description

I/O Type

Direction

Pin State in

1

Ground

Power

–

–

2

Power

Power

–

–

3

KEY (no pin)

–

–

–

–

4

RX

UART Rx

1

In

–

5

TX

UART Tx

1

Out

6

Reserved

No connect

–

–

–