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PDF LTP5900-WHM Data sheet ( Hoja de datos )
| Número de pieza | LTP5900-WHM | |
| Descripción | 2.4GHz 802.15.4 Wireless Mote | |
| Fabricantes | Linear Technology | |
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S M A R T M E S H® W I R E L E S S H A R T L T P 5 9 0 0 - W H M
2.4 GHz 802.15.4 Wireless Mote
About SmartMesh WirelessHART
Dust Networks’ SmartMesh® WirelessHART is an industry-leading wireless networking solution designed for critical monitoring and
control applications. WirelessHART serves a wide range of applications from renewable energy generation, such as solar and wind power,
to factory machine health monitoring and data center HVAC energy management. The SmartMesh WirelessHART system delivers
dynamic network optimization and intelligent routing to achieve unsurpassed levels of wireless network scalability, system-wide reliability
and low latency, coupled with industrial-class security. Additionally, ultra-low power operation permits even greater deployment flexibility
for wire-free applications.
Product Description—LTP5900
The LTP5900 mote module combines Dust Networks’ robust sensor networking solution breakthrough EternaTM SoC technology in an
easy-to-integrate 22-pin module. As part of the SmartMesh WirelessHART system, the LTP5900 enables customers to integrate a
standards-based wireless network into sensors and actuators to provide scalable bidirectional communications.
The LTP5900 is designed for use in line-powered, battery-powered, or energy-scavenging sensor and actuator applications that demand
reliable performance and ultra-low power operation. With Dust Networks’ innovative IEEE 802.15.4-compliant design and integrated
power amplifier, the LTP5900 enables a decade of battery life on two AA batteries. All motes function as wireless routers, enabling a
redundant, high performance, full-mesh topology.
The LTP5900 integrates all radio circuitry components, including an MMCX-type antenna connector to eliminate the need for complex RF
design. To accelerate customer development time and reduce development costs, Dust Networks provides a fully engineered RF solution,
comprehensive APIs, and complete development documentation.
Key Product Features
WirelessHART Compliance
• Interoperable with WirelessHART Devices
Highly Scalable
• Automatic network formation—new motes join automatically
from anywhere in the network
• All motes are wireless routers, providing a full-mesh network
that easily scales to tens of thousands of motes per square km
• Time-synchronized communication across 15 channels
virtually eliminates in-network collisions, allowing for dense
deployments in overlapping radio space
Superior Reliability
• SmartMesh WirelessHART Intelligent Networking Platform
enables greater than 99.99% network reliability even in the
most challenging monitoring and control environments
• Time-synchronized channel hopping minimizes the impact of
crippling multipath interference in dynamic RF environments
Ultra-low Power Operation
• Industry-leading radio technology capable of line-powered,
battery-powered, or energy-scavenging operation
• Automatic network-wide coordination optimizes power
consumption, enabling a decade of network operation on
two Lithium AA batteries
Easy to Integrate and Deploy
• Fully engineered RF, with power amplifier (PA), balun,
crystals, antenna matching circuitry and antenna connector
• Comprehensive APIs provide rich and flexible functionality
to ease software development and device integration
Secure Global Market Solution
• Fully engineered RF, with power amplifier (PA), balun,
crystals, and antenna matching circuitry
• AES-128 bit encryption
LTP5900 Mote Datasheet
Dust Networks
1
1 page  
Unless otherwise noted, Table 3 assumes VDD is 3.6 V.
Table 3 Current Consumption
Parameter
Transmit
Power amplifier enabled
Power amplifier disabled
Receive
Min
Typ
9.5
5.2
4.4
Max
Units
mA
mA
mA
Comments
3.0 Electrical Specifications
Table 4 Device Load
Parameter
Min
Typ
Max
Total capacitance
6
Total inductance
4.9
Unless otherwise noted, VDD is 3.6 V and temperature is –40 °C to +85 °C.
Table 5 Digital I/O Type 1
Digital Signal
VIL (low-level input voltage)
VIH (high-level input voltage)
VOL (low-level output voltage)
VOH (high-level output voltage)
Input leakage current
Min
–0.3
VDD-0.3
VDD-0.3
Typ
50
Max
0.6
VDD + 0.3
0.4
Units
µF
µH
Comments
VDD to VSS
VDD to VSS
Units
V
V
V
V
nA
Comments
IOL(max) = 1.2 mA
IOH(max) = −1.8 mA
25 °C
4.0 Radio
4.1 Detailed Radio Specifications
Table 6 Detailed Radio Specifications
Parameter
Operating frequency
Number of channels
Channel separation
Occupied channel bandwidth
Frequency Accuracy
Modulation
Raw data rate
Receiver operating maximum input
level
Receiver sensitivity
Min
2.4000
-40
Typ
15
5
2.7
250
0
–95.0
Max
2.4835
+40
–92.5
Output power, conducted
Power amplifier enabled
Power amplifier disabled
+8
0
Units
GHz
Comments
MHz
MHz
ppm
kbps
dBm
dBm
dBm
At –20 dBc
IEEE 802.15.4 DSSS
At 50% PER, VDD = 3 V,
25 °C
At 1% PER, VDD = 3 V,
25 °C
dBm
dBm
VDD = 3.6 V, 25 °C
VDD = 3.6 V, 25 °C
LTP5900 Mote Datasheet
Dust Networks
5
5 Page 
Figure 5 Operation of T¯I¯M¯E¯ Pin
Table 11 T¯I¯M¯E¯ Timing Values
Variable
tstrobe
tresponse
Description
T¯I¯M¯E¯ strobe pulse width
Negation of Time strobe to start of time packet
Min
125
Max
100
Units
µs
ms
8.3 Settable I/O Modes
The LTP5900 offers a choice of two I/O modes. The functionality of the interface will be determined by the setting of
Mode pin B whose pinout is described in 5.0 Pinout.
Table 12 Mode Pin Settings
Pin
Mode pin B
Mode 1
Externally tied low
Mode 3
Externally tied high
All modes provide a means of transmitting and receiving serial data through the wireless network, as well as a command
interface that provides synchronized time stamping, local configuration, and diagnostics.
Mode 1 implements an 8-bit, no parity, 9600 bps baud three, four or five-signal serial interface with bidirectional packet-
level flow control operating at 9600 bps. In certain OEM designs, one or two of the serial handshake signals may be optional
for reduced pin count, as described in Table 13.
Mode 3 implements an 8-bit, no parity, 115.2 kbps baud five-signal serial interface with bidirectional packet-level flow
control and byte-level flow control in the mote-to-microprocessor direction only.
8.3.1
Mode 1: Three/Four/Five-signal Serial Interface (9600 bps)
The LTP5900 mode 1 provides a three, four, or five-signal serial interface that is optimized for low-powered embedded
applications (and in certain designs may provide a low pin count serial solution). The mode 1 serial interface is comprised of
the data pins (TX, RX) as well as handshake pins (M¯¯T¯_¯R¯¯T¯S, M¯¯T¯_¯C¯¯T¯S, ¯S¯P¯_¯C¯T¯S¯) used for bidirectional flow control. The
M¯¯T¯_¯R¯¯T¯S signal is ideal for designs where the microprocessor requires extra time to prepare to receive a packet (for example,
the OEM microprocessor sleeps periodically, but requires a wake-up signal prior to receiving a packet). Refer to Table 13 for
information on each handshake pin, including details on which pins are optional.
LTP5900 Mote Datasheet
Dust Networks
11
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