LTP5900-WHM
SmartMesh WirelessHART Node
Wireless Mote Module
NETWORK FEATURES
DESCRIPTION
Complete Radio Transceiver, Embedded Processor,
and Networking Software for Forming a Self-Healing
Mesh Network
n Compliant to WirelessHART (IEC62591) Standard
n SmartMesh® Networks Incorporate:
n Time Synchronized Network-Wide Scheduling
n Per Transmission Frequency Hopping
n Redundant Spatially Diverse Topologies
n Network-Wide Reliability and Power Optimization
n NIST Certified Security
n SmartMesh Networks Deliver:
n>99.999% Network Reliability Achieved in the
Most Challenging Dynamic RF Environments Often
Found in Industrial Applications
n Sub 50µA Routing Nodes
SmartMesh WirelessHART wireless sensor networks are
self managing, low power networks built from wireless
nodes called motes. The LTP™5900-WHM is the 22-pin
WirelessHART mote product in the Eterna®* family of
IEEE 802.15.4 printed circuit board assembly solutions,
featuring a highly-integrated, low power radio design
by Dust Networks® as well as an ARM Cortex-M3 32-bit
microprocessor running Dust’s embedded SmartMesh
WirelessHART networking software. The LTP5900-WHM
provides a forward compatible solution for customers
using Dust Networks M2510 PCB module.
n
LTP5900-WHM FEATURES
Industry-Leading Low Power Radio Technology with:
n4.5mA to Receive a Packet
n5.4mA to Transmit at 0dBm
n9.7mA to Transmit at 8dBm
n RF Modular Certifications Include USA, Canada, and EU
n24mm × 39mm, 22-Pin PCB Assembly with MMCX
Antenna Connector
n
With Dust’s time-synchronized WirelessHART networks,
all motes in the network may route, source or terminate
data, while providing many years of battery powered operation. The SmartMesh WirelessHART software provided
with the LTP5900-WHM is fully tested and validated, and
is readily configured via a software Application Programming Interface (API).
SmartMesh WirelessHART motes deliver a highly flexible
network with proven reliability and low power performance
in an easy-to-integrate platform.
L, LT, LTC, LTM, Eterna, SmartMesh, Linear Technology, the Linear logo, Dust and Dust
Networks are registered trademarks and LTP and the Dust Networks logo are trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners. Protected by U.S. Patents, including 7375594, 7420980, 7529217, 7791419, 7881239,
7898322, 8222965.
* Eterna is Dust Networks’ low power radio SoC architecture.
TYPICAL APPLICATION
MANAGER
LTP5900-WHM
EXPANDED VIEW
LTP5903-WHR
MOTE
ANTENNA
MOTE
IN+
SENSOR
LTC®2379-18 SPI
µCONTROLLER
UART
UART
ETHERNET
IN–
HOST
APPLICATION
MOTE
MOTE
MOTE
5900WHM TA01
5900whmfa
For more information www.linear.com/LTP5900-WHM
1
LTP5900-WHM
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
(Notes 1, 2)
TOP VIEW
Supply Voltage (VDD to VSS).................... –0.3V to 4.20V
Voltage on Any Digital I/O Pin.. VSS – 0.3V to VDD + 0.3V
Input RF Level, Input Power at Antenna Connector..........
10dBm
Storage Temperature Range................... –55°C to 105°C
VSWR of Antenna....................................................... 3:1
Operating Temperature Range..................–40°C to 85°C
ANTENNA
CONNECTOR
1
VSS
2
VDD
3
KEY (NO PIN)
4
RST
22
SPI_CS
21
KEY (NO PIN)
20
RX
MISO
19
5
TX
MOSI
18
6
RESERVED
SCK
17
7
MT_RTS
RESERVED
16
8
MT_CTS
RESERVED
15
9
SP_CTS
RESERVED
14
10
TIME
RESERVED
13
11
MODE PIN B
FLASH_P_EN
12
PC PACKAGE
22-LEAD (39mm × 24.4mm) PCB
ORDER INFORMATION
LEAD FREE FINISH†
PART MARKING
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTP5900IPC-WHMA#PBF
LTP5900IPC-WHMA#PBF
22-Lead (39mm × 24.4mm) PCB
–40°C to 85°C
†This product ships with the flash erased at the time of order. OEMs will need to program devices during development and manufacturing.
For legacy part numbers and ordering information, go to: http://www.linear.com/product/LTP5900-WHM#orderinfo
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
ELECTRICAL
CHARACTERISTICS
PARAMETER
Specifications are at TA = 25°C, VDD = 3.6V unless otherwise noted.
CONDITIONS
MIN
Including Noise and Load Regulation
2.75
TYP
MAX
UNITS
3.76
V
250
mVP-P
DC Specifications
Operational Supply Voltage Range
(Between VDD and VSS)
Voltage Supply Noise
50Hz to 2MHz
Voltage Supervisor Trip Point
Reset Trip Point
1.5
V
Supply Current, Peak
Searching for Network, Typically 150ms on and 2850ms
in Doze (Note 2)
4.5
mA
Supply Current, Peak During Power on Reset Maximum 750uS + VDD Rise Time from 1V to 1.9V
12
mA
Supply Current, Peak Power Amplifier
Enabled
9.7
TX, 5ms Maximum, 85°C (Note 7)
Peak Current Power Amplifier Disabled
TX, 5ms Maximum
TX, 5ms Maximum
mA
12
5.4
mA
mA
5900whmfa
2
For more information www.linear.com/LTP5900-WHM
LTP5900-WHM
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
Maximum Allowed Temperature Ramp
During Operation
–40°C to 85°C
Operating Relative humidity
Non-Condensing
Specifications are at TA = 25°C, VDD = 3.6V unless otherwise noted.
MIN
TYP
10
MAX
UNITS
8
°C/min
90
% RH
Current Consumption
Supply Current, Transmit
Power Amplifier Enabled
Power Amplifier Disabled
Supply Current, Receive
9.7
5.4
mA
mA
4.5
mA
Device Load
Total Capacitance
VDD to VSS (Note 7)
6
µF
Total Inductance
VDD to VSS (Note 7)
4.9
µH
Specifications are at –40°C to 85°C, VDD = 3.6V unless otherwise noted.
PARAMETER
CONDITONS
MIN
TYP
MAX
UNITS
Digital Signals
VIL (Low Level Input Voltage)
–0.3
0.6
V
VIH (High Level Input Voltage)
VDD – 0.3
VDD + 0.3
V
0.4
V
VOL (Low Level Output Voltage)
IOL(MAX) = 1.2mA
VOH (High Level Output Voltage)
IOH(MAX) = −1.8mA
Input Leakage Current
25°C
VDD – 0.3
V
50
nA
Radio Specifications
Operating Frequency
(Note 7)
2.4000
2.4835
Number of Channels
15
Channel Separation
5
Occupied Channel Bandwidth
At –20dBc
Frequency Accuracy
(Note 7)
Modulation
IEEE 802.15.4 DSSS
Raw Data Rate
Receiver Operating Maximum Input Level
Receiver Sensitivity
Output Power, Conducted
Power Amplifier Enabled
Power Amplifier Disabled
Range (Note 3)
Power Amplifier Enabled:
Indoor (Note 4)
Outdoor (Note 4)
Free space
Power Amplifier Disabled:
Indoor (Note 4)
Outdoor (Note 4)
Free space
At 50% PER, VDD = 3V, 25°C
At 1% PER, VDD = 3V, 25°C
VDD = 3.6V, 25°C
VDD = 3.6V, 25°C
25°C, 50% RH, 2dBi Omni-Directional Antenna, 2m above
ground
MHz
2.7
–40
GHz
MHz
40
ppm
250
kbps
0
dBm
–95.0
–92.5
dBm
dBm
8
0
dBm
dBm
100
300
1200
meters
meters
meters
25
200
350
meters
meters
meters
5900whmfa
For more information www.linear.com/LTP5900-WHM
3
LTP5900-WHM
ANTENNA
SPECIFICATIONS
A MMCX-compatible male connector is provided on board for the antenna connection.
The antenna must meet the following specifications. For a list of FCC-approved antennae, see the FCC-Approved Antennae section.
PARAMETER
VALUE
Frequency Range
2.4GHz to 2.4835GHz
Impedance
50Ω
Maximum VSWR
3:1
Connector
MMCX (Note 5)
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.
Note 1: The absolute maximum ratings shown should not be violated
under any circumstances. Permanent damage to the device may be caused
by exceeding one or more of these parameters.
Note 2: ESD (electrostatic discharge) sensitive device. ESD protection
devices are used extensively internal to the LTP5900. However, high
electrostatic discharge can damage or degrade the device. Use proper ESD
handling precautions.
Note 3: The duration of doze time and “on” time is determined by the
joinDutyCycle command in the mote serial API. Refer to the SmartMesh
WirelessHART Mote Serial API Guide for details.
Note 4: 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.
Note 5: 1 meter above ground.
Note 6: The LTP5900-WHM 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.
Note 7: Guaranteed by design. Not production tested.
PIN FUNCTIONS
VSS (Pin 1): Ground. I/O type = power.
VDD (Pin 2): Power. I/O type = power.
KEY (Pins 3, 20): No Pin.
RX (Pin 4): UART RX. I/O type = 1. Direction = In.
TX (Pin 5): UART TX. I/O type = 1. Direction = Out. Pin
state in Deep Sleep = VDD. Deep Sleep is the lowest possible power state, with VDD and GND connected. The mote
microprocessor and radio are inactive, and the mote must
be awakened using the RST signal (for more information
see the lowPowerSleep command in the WirelessHART
Mote Serial API Guide).
Reserved (Pins 6, 13, 14, 15, 16): No Connection.
MT_RTS (Pin 7): UART Active Low Mote Ready to Send.
I/O type = 1. Direction = Out. Pin state in Deep Sleep = VDD.
Deep Sleep is the lowest possible power state, with VDD
and GND connected. The mote microprocessor and radio
are inactive, and the mote must be awakened using the
RST signal (for more information see the lowPowerSleep
command in the WirelessHART Mote Serial API Guide).
MT_CTS (Pin 8): UART Active Low External Processor
Clear to Send. I/O type = 1. Direction = Out. Pin state
in Deep Sleep = VDD. Deep Sleep is the lowest possible
power state, with VDD and GND connected. The mote microprocessor and radio are inactive, and the mote must
be awakened using the RST signal (for more information
see the lowPowerSleep command in the WirelessHART
Mote Serial API Guide).
SP_CTS (Pin 9): UART Active Low Serial Peripheral Clear
to Send. I/O type = 1. Direction = In.
TIME (Pin 10): Falling Edge Time Request. I/O type = 1.
Direction = In. The TIME input pin is optional, and must
either be driven or pulled up with a 5.1M resistor. Unless
noted otherwise, all signals are active low.
MODE_PIN_B (Pin 11): Selects Between Mode 1 and
Mode 3 Operation. I/O type = 1. Direction = In.
FLASH_P_EN (Pin 12): Active Low Flash Power Enable.
I/O Type = 1. Direction = In.
SCK (Pin 17): SPI Clock. I/O type = 1. Direction = In.
5900whmfa
4
For more information www.linear.com/LTP5900-WHM
LTP5900-WHM
PIN FUNCTIONS
MOSI (Pin 18): SPI Master Out Slave In Serial Data. I/O
type = 1. Direction = In.
MISO (Pin 19): SPI Master In Slave Out Serial Data. I/O
type = 1. Direction = Out.
SPI_CS (Pin 21): Active Low Flash Chip Select. I/O type
= 1. Direction = In.
RST (Pin 22): Active Low Reset. I/O type = 1. Direction
= In. The RST input pin is internally pulled up and connecting it is optional. When driven active low, the mote is
hardware reset until the signal is de-asserted. Refer to the
Power-On Sequence section for timing requirements on the
RST pin. Note that the mote may also be reset using the
mote serial command (see the SmartMesh WirelessHART
Mote Serial API Guide).
BLOCK DIAGRAM
LTP5900-WHM
NETWORK SYNCHRONIZED REAL TIME CLOCK
TEMPERATURE COMPENSATION
CRYSTAL
OSCILLATORS
WIRELESS
POWER MANAGEMENT
MODE B
JOIN DUTY CYCLE
BOOT CURRENT CONTROL
SERIAL
•
PACKET QUEUE
•
UART
I/O
•
CRC
CFG AND
MGMNT
SERIAL DATA
FLOW
CONTROL
NETWORK
DATA
TRANSMIT
QUEUE
RECEIVE
QUEUE
CHANNEL
MANAGEMENT
RF DESIGN
IEEE 802.15.4 PHY
POWER SUPPLY INFO
INTELLIGENT
NETWORKING
PLATFORM
RSSI
VOLTAGE SUPERVISOR
RST
ENCRYPTION AND AUTHENTICATION
GND
IEEE 802.15.4E MAC
VCC
DRIFT COMPENSATION
POWER
AMPLIFIER
BALUN
ANTENNA
MATCHING
CIRCUITRY
ANTENNA
CONNECTOR
5900WHM BD
5900whmfa
For more information www.linear.com/LTP5900-WHM
5
LTP5900-WHM
MOTE BOOT UP
POWER-ON SEQUENCE
MOTE BOOT SEQUENCE
The LTP5900-WHM has internal power-on reset circuits
that ensure that the mote will properly boot. External resetting of the device is not required and not recommended.
Following the negation of RST the mote completes its
boot-up process by loading the application image and
loading the operating parameters. The LTP5900-WHM
lowers average current consumption by spreading the boot
operation over time. This method supports systems with
supplies having a maximum DC current less than the peak
current required by the LTP5900-WHM. These systems
must store enough charge to maintain the supply through
the LTP5900-WHM’s peak current consumption. For more
information, contact your Linear Technology applications
engineer. The maximum average current consumption for
the LTP5900-WHM is defined by the maximum total charge
Q consumed over a sliding window in time, t WINDOW.
Table 1. Power-On Sequence
PARAMETER
COMMENTS
MIN
RST Pulse Width
Reset Timing
125
TYP
MAX
UNITS
µs
INRUSH CURRENT
During power on, the mote can be modeled as a lumped
impedance, as shown in Figure 1. With a source impedance
(RSRC) of 1Ω, the inrush current on the mote appears as
shown in Figure 2.
RSRC
VSRC
1.4Ω
0.4Ω
CURRENT
+
2.2µF
2.4µF
tWINDOW
MOTE EQUIVALENT SERIES
RC CIRCUIT
5900WHM F01
Figure 1. LTP5900-WHM Equivalent Series RC Circuit
TIME
2000
1750
POWER APPLIED
Figure 3. Boot Sequence
CURRENT (mA)
1500
1250
Table 2. Boot Sequence Parameters
1000
PARAMETER COMMENTS
750
t BOOT_DELAY
The time between mote
power greater than 1.9V and
serial interface availability
Q
t WINDOW = 0.56s
500
250
0
5900WHM F03
0
10
20
30
TIME (µs)
40
50
5900WHM F02
Figure 2. VDD Inrush Current (Power-On
with Supply Impedance of 1Ω)
MIN
TYP
MAX
UNITS
3
5
sec
200
µC
SERIAL INTERFACE BOOT UP
LTP5900-WHM Serial Interface Boot Up
Upon LTP5900-WHM power up, the MT_CTS line is high
(inactive). The LTP5900-WHM serial interface boots within
tBOOT_DELAY (see the Mote Boot Sequence section) of the
mote powering up, at which time the LTP5900-WHM will
transmit an HDLC boot event packet. Note that full handshake is in effect and is required to receive this packet.
5900whmfa
6
For more information www.linear.com/LTP5900-WHM
LTP5900-WHM
INTERFACES
RESET PIN
The RST input pin is internally pulled up. Connecting it is
optional; however, in applications operating in the presence of EMI, RST should be actively driven high. When
driven low, the mote hardware is in reset. Note that the
mote may also be reset using the mote reset command
(0×08). For requirements on reset timing, see the Mote
Boot Up section.
The LTP5900-WHM is a highly sophisticated device and
Linear Technology recommends doing resets gracefully.
If the device is in the network, a disconnect command
(0×07) should be issued before the RST signal is asserted.
This will result in the device rebooting and sending the
boot event.
The RST signal may then be asserted since the device is
not in the network.
Refer to the LTP5900-WHM Integration Guide for recommendations on how to connect to the RST pin, including
voltage supervision. For detailed information about mote
serial commands, refer to the SmartMesh WirelessHART
Mote Serial API Guide.
TIMESTAMPS
The LTP5900-WHM has the ability to deliver network-wide
synchronized timestamps. The LTP5900-WHM sends a
time packet (as described in the SmartMesh WirelessHART
Mote Serial API Guide) through its serial interface when
one of the following occurs:
• Mote receives an HDLC request to read time
• The TIME signal is asserted
The TIME pin is optional and has the advantage of being
more accurate. The value of the timestamp is taken within
tSTROBE
approximately 1ms of receiving a TIME signal activation.
If the HDLC request is used, due to packet processing the
value of the timestamp may be captured several milliseconds after receipt of the packet. Refer to the SmartMesh
WirelessHART Mote Serial API Guide for more information
on timestamps.
Table 3. TIME Timing Values
VARIABLE
DESCRIPTION
MIN
tSTROBE
TIME Strobe Pulse Width
125
tRESPONSE
Negation of Time Strobe to
Start of Time Packet
MAX
UNITS
µs
100
ms
SETTABLE I/O MODES
The LTP5900-WHM 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
the Pin Functions section.
Table 4. Mode Pin Settings
PIN
MODE 1
MODE 3
MODE_PIN_B
Externally Tied Low
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, 9600bps baud
three-, four- or five-signal serial interface with bidirectional
packet-level flow control operating at 9600bps. In certain
OEM designs, one or two of the serial handshake signals
may be optional for reduced pin count, as described in
Table 5.
Mode 3 implements an 8-bit, no parity, 115.2kbps baud
five-signal serial interface with bidirectional packet-level
flow control and byte-level flow control in the mote-tomicroprocessor direction only.
TIME
Mode 1: Three/Four/Five-Signal Serial Interface
(9600bps)
tRESPONSE
TX
TIME PACKET
5900WHM F04
Figure 4. Operation of TIME Pin
The LTP5900-WHM mode 1 provides a three-, four-,
or five-signal serial interface that is optimized for low
powered embedded applications (and in certain designs
5900whmfa
For more information www.linear.com/LTP5900-WHM
7
LTP5900-WHM
INTERFACES
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 (MT_RTS, MT_CTS, SP_CTS)
used for bidirectional flow control. The MT_RTS 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 wakeup signal prior to receiving a packet). Refer to Table 5 for
information on each handshake pin, including details on
which pins are optional.
Table 5. Mode 1 Pin Usage
PIN
I/O
RX
Input
USAGE
Serial data moving from the microprocessor to the mote.
TX
Output
Serial data moving from the mote to the microprocessor.
MT_RTS
Output
MT_RTS provides a mechanism to wake up the microprocessor in order to receive a packet. This signal is asserted when
the mote is ready to send a serial packet. The signal stays low until the signal from the microprocessor is detected low by
the mote (indicating readiness to receive a packet) or the t MT_RTS to SP_CTS timeout defined in the UART AC Timing section
expires. If MT_RTS times out, it will de-assert , wait for t MT_RTS retry and then re-assert to attempt to send the serial packet
again (see Figure 8). MT_RTS may be ignored by the microprocessor only if always stays low.
SP_CTS
Input
SP_CTS provides packet-level flow control for packets transferred from the mote to the microprocessor. When the
microprocessor is capable of receiving a packet it should assert the SP_CTS signal. SP_CTS may be externally tied low
(reducing pin count) only if the microprocessor is always ready to receive a serial packet.
MT_CTS
Output
MT_CTS provides packet-level flow control for packets transferred from the microprocessor to the mote that are destined
for transfer over the network. Upon reset, following boot the mote will negate MT_CTS until the mote establishes a wireless
network connection. During operation, the mote will negate MT_CTS if the mote does not have sufficient buffering to accept
another packet. MT_CTS will also remain high if the mote is not part of the network. The microprocessor must check that
the MT_CTS pin is low before initiating each serial packet for wireless transmission. Note that the mote may receive local
serial packets at any time regardless of the MT_CTS state. (For a list of local commands, see the SmartMesh WirelessHART
Mote Serial API Guide.)
TIME
Input
The TIME pin can be used for triggering a timestamp packet. Its usage is optional.
Table 6. Mode 3 Pin Usage
PIN
I/O
RX
Input
USAGE
Serial data moving from the microprocessor to the mote.
TX
Output
Serial data moving from the mote to the microprocessor.
MT_RTS
Output
MT_RTS provides a mechanism to wake up the microprocessor in order to receive a packet. This signal is asserted when
the mote is ready to send a serial packet. The signal stays low until the SP_CTS signal from the microprocessor is detected
low by the mote (indicating readiness to receive a packet) or the t MT_RTS to SP_CTS timeout defined in the UART AC Timing
section expires. If MT_RTS times out, it will de-assert MT_RTS, wait for t MT_RTS retry and then re-assert MT_RTS to
attempt to send the serial packet again (see Figure 8).
SP_CTS
Input
SP_CTS provides byte-level flow control for packets transferred from the mote to the microprocessor. When the
microprocessor is capable of receiving a packet it should assert the SP_CTS signal. In mode 3 byte-level flow control is
achieved by having the microprocessor negate and then reassert the SP_CTS signal following the receipt of each byte. The
mote will begin transmission of the next byte after detecting the reassertion of SP_CTS.
MT_CTS
Output
MT_CTS provides packet-level flow control for packets transferred from the microprocessor to the mote that are destined
for transfer over the network. Upon reset, following boot the mote will negate MT_CTS until the mote establishes a wireless
network connection. During operation, the mote will negate MT_CTS if the mote does not have sufficient buffering to accept
another packet. MT_CTS will also remain high if the mote is not part of the network. The microprocessor must check that
the MT_CTS pin is low before initiating each serial packet for wireless transmission. Note that the mote may receive local
serial packets at any time regardless of the MT_CTS state. For a list of local commands, see the SmartMesh WirelessHART
Mote Serial API Guide.
TIME
Input
The TIME pin can be used for triggering a timestamp packet. Its usage is optional.
5900whmfa
8
For more information www.linear.com/LTP5900-WHM
LTP5900-WHM
INTERFACES
Mode 3: Five-Signal Serial Interface (115.2kbps)
The LTP5900-WHM mode 3 provides a five-signal serial
interface with byte-level flow control on transfers from the
mote to the microprocessor. The mode 3 serial interface is
comprised of the data pins (TX, RX) as well as handshake
pins (MT_RTS, MT_CTS, SP_CTS) used for bidirectional
flow control. The MT_RTS 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 6 for information on each
handshake pin, including details on which pins are optional.
UART AC Timing
Table 7. UART Timing Values (Note 7)
VARIABLE
DESCRIPTION
MIN
MAX
–2
2
tRX_BAUD
Deviation from baud rate
tRX_STOP
Number of stop bits (9600bps)
1
bit period
tRX_STOP
Number of stop bits (115.2kbps)
1.5
bit period
%
tTX_BAUD
Deviation from baud rate
–1
tTX_STOP
Number of stop bits
1
t SP_CTS to MT_RTS
Assertion of SP_CTS to negation of MT_RTS
0
t MT_RTS to SP_CTS
Assertion of MT_RTS to assertion of SP_CTS
500
ms
t MT_RTS RETRY
Time from a MT_RTS timeout to the retry.
500
ms
t SP_CTS to TX
Assertion of SP_CTS to start of byte
10
ms
tTX to SP_CTS
Start of byte to negation of SP_CTS
t SP_CTS ACK PW
Negation pulse width of SP_CTS
0
1
UNITS
%
bit period
10
1
ms
bit period
500
ns
tDIAG_ACK_TIMEOUT*
The mote responds to all requests within this time.
125
ms
tINTERBYTE_TIMEOUT
Falling edge of TX to falling edge of SP_CTS (Mode 3 only)
7.1
ms
tINTERPACKET_DELAY
The sender of an HDLC packet must wait at least this amount of time before sending another packet
20
ms
* For more information about supported requests and details on when tDIAG_ACK_TIMEOUT applies, refer to the SmartMesh WirelessHART Mote Serial API Guide.
RST
tBOOT_DELAY
TX
MT_RTS
MT_CTS
Hi-Z
Hi-Z
Hi-Z
5900WHM F05
Figure 5. Power-On Sequence. See the Mote Boot Sequence Section for the Value of tBOOT_DELAY
5900whmfa
For more information www.linear.com/LTP5900-WHM
9
LTP5900-WHM
INTERFACES
tRX_BAUD
RX
tTX_STOP
LSB
MSB
tTX_STOP
tTX_BAUD
TX
STOP
LSB
MSB
STOP
5900WHM F06
Figure 6. Byte-Level Timing
tSP_CTS to MT_RTS
MT_RTS
tMT_RTS to SP_CTS
SP_CTS
tSP_CTS to TX
t SP_CTS ACK PW
tTX to SP_CTS
TX
0×7E
BYTE 0
0×7E
5900WHM F07
tINTERBYTE_TIMEOUT
Figure 7. Flow Control Timing
t MT_RTS RETRY
MT_RTS
t MT_RTS to SP_CTS
SP_CTS
5900WHM F08
Figure 8. MT_RTS Timeout Behavior
tINTERPACKET_DELAY
PACKET N+1
PACKET N
RX
0×7E*
BYTE 0
BYTE N
0 ×7E
* THE FRAMING BYTE, 0 ×7E, MUST NOT BE REPEATED
AT THE START OF EACH PACKET SENT TO THE LTP5900.
0 × 7E*
5900WHM F09
Figure 9. Packet Timing
5900whmfa
10
For more information www.linear.com/LTP5900-WHM
LTP5900-WHM
INTERFACES
MOTE SERIAL API
SOFTWARE INSTALLATION
The LTP5900-WHM offers a comprehensive application
programming interface (API) that provides full programmatic access to control the mote, monitor its status (such
as battery charge and network status), and provide access
to the wireless mesh network. Refer to the SmartMesh
WirelessHART Mote Serial API Guide for more information.
Devices are supplied with the flash erased, requiring programming as part of the OEMs manufacturing procedure.
The US department of commerce places restrictions on
export of systems and software supporting encryption. All
of Linear/Dust product software produced to date contains
encryption and is subject to export regulations and may
be provided only via MyLinear, https://www.linear.com/
mylinear. Customers purchasing SmartMesh products
will receive a certificate containing a registration key and
registration instructions with their order. After registering
with the key, customers will be able to download SmartMesh software images from MyLinear. Once registered,
customers will receive automated e-mail notifications as
software updates are made available.
TEMPERATURE SENSOR
The LTP5900-WHM has an onboard temperature sensor.
The temperature readings are available locally through the
mote serial API and through the network at the manager
via the XML API. For more information, refer to the SmartMesh WirelessHART Mote Serial API Guide, SmartMesh
WirelessHART Manager API Guide.
Table 8. Temperature Sensor
PARAMETER
MIN
Sensor Input Range
–40
Accuracy
TYP
MAX
85
±7
UNITS
°C
°C
Linear Technology offers the DC9010, in circuit programmer for the Eterna based products. While the DC9010, is
provided as a finished product, the design documents are
provided as a reference for customers.
Once software has been loaded, devices can be configured
via the API port. Configuration commands and settings
are defined in SmartMesh WirelessHART Mote API Guide.
5900whmfa
For more information www.linear.com/LTP5900-WHM
11
LTP5900-WHM
APPLICATIONS INFORMATION
REGULATORY AND STANDARDS COMPLIANCE
Radio Certification
The LTP5900 has been certified under a single modular certification, with the module name of ETERNA1. Following the
regulatory requirements provided in the ETERNA1 User’s
Guide enables customers to ship products in the supported
geographies, by simply completing an unintentional radiator scan of the finished product(s). The ETERNA1 User’s
Guide also provides the technical information needed to
enable customers to further certify either the modules or
products based upon the modules in geographies that
have not or do not support modular certification.
Compliance to Restriction of Hazardous Substances
(RoHS)
Restriction of Hazardous Substances 2 (RoHS 2) is a
directive that places maximum concentration limits on
the use of certain hazardous substances in electrical and
electronic equipment. Linear Technology is committed to
meeting the requirements of the European Community
directive 2011/65/EU.
This product has been specifically designed to utilize
RoHS-compliant materials and to eliminate or reduce the
use of restricted materials to comply with 2011/65/EU.
The RoHS-compliant design features include:
RoHS-compliant solder for solder joints
n
RoHS-compliant base metal alloys
n
RoHS-compliant precious metal plating
n
munity directive 2011/65/EU. Depending on the type of
solder paste chosen, a corresponding process change to
optimize reflow temperatures may be required.
SOLDERING INFORMATION
The LTP5900 is suitable for both eutectic PbSn and RoHS6 reflow. The maximum reflow soldering temperature is
260°C. A more detailed description of layout recommendations, assembly procedures and design considerations
is included in the LTP5900 Hardware Integration Guide.
INDUSTRIAL ENVIRONMENT OPERATION
The LTP5900-WHM is designed to meet the specifications
of harsh industrial environments which includes:
• Shock and Vibration—The LTP5900-WHM complies
with high vibration pipeline testing, as specified in IEC
61298-3.
• Temperature Extremes—The LTP5900-WHM is designed for industrial storage and operational temperature
range of –40°C to 85°C.
ENCRYPTION CIPHER
The LTP5900-WHM’s 128-bit Advanced Encryption Standard (AES) cipher has been certified compliant to the United
States National Institute of Standards and Technology
(NIST) FIPS-197 (NIST certificate number, AES: 1437).
To view the FIPS-197 validation list, go to: http://csrc.nist.
gov/groups/STM/cavp/documents/aes/aesval.html
RoHS-compliant cable assemblies and connector
choices
n
Halogen-free mold compound
n
RoHS-compliant and 245 °C re-flow compatible
n
Note: Customers may elect to use certain types of leadfree solder alloys in accordance with the European Com-
5900whmfa
12
For more information www.linear.com/LTP5900-WHM
LTP5900-WHM
RELATED DOCUMENTATION
• LTP5900-WHM Integration Guide
• SmartMesh WirelessHART Mote Serial API Guide
5900whmfa
For more information www.linear.com/LTP5900-WHM
13
LTP5900-WHM
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTP5900-WHM#packaging for the most recent package drawings.
PC Package
22-Lead (39mm × 24.4mm) PCB
(Reference LTC DWG # 05-08-1001 Rev D)
5900whmfa
14
For more information www.linear.com/LTP5900-WHM
LTP5900-WHM
REVISION HISTORY
REV
DATE
DESCRIPTION
A
01/16
Added Software Installation section.
PAGE NUMBER
11
5900whmfa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection
its circuits as described
herein will not infringe on existing patent rights.
For moreofinformation
www.linear.com/LTP5900-WHM
15
LTP5900-WHM
TYPICAL APPLICATION
Mesh Network Thermistor
RT = 5k • AI_0 / (2 • AI_1 – AI_0)
T(°C) = 1 / {A + B [Ln(RT)] + C[Ln(RT)]3} – 273.15
A = 1.032 • 10–3
B = 2.387 • 10–4
C = 1.580 • 10–7
TADIRAN TL-5903
Li-SoCI2
LTC5900-WHM
ANTENNA
ATMEL SAM4L2
VDD
VDDIN
47µF
LT6654-2.048
VOUT
0.1µF
0.1µF
GND2
VDDIO
4.7µF
VIN
PA08 (GP08)
0.1µF
GND1
5k
0.1%
0.1µF
PA04 (AD0)
FB
1000pF
VDDANA
0.1µF
VSS
TX
MT_RTS
MT_CTS
RX
SP_CTS
PA15 (USART1_RXD)
PA17 (EXTINT2)
PA13 (GPO13)
PA16 (USART1_TXD)
PA18 (EXTINT3)
22µH
4.7µF
VDDOUT
VDDCORE
0.1µF
10k
0.2C
OMEGA 44006
5k
0.1%
PA05 (AD1)
1000pF
5k
0.1%
ADVREFP
XOUT32
32.768kHz
GND
XIN32
5900WHM TA02
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTP5903IPC-WHRB
WirelessHART Embedded 250 Mote Manager
Manages Networks of Up to 250 SmartMesh WirelessHART Nodes
LTC5800-WHM
WirelessHART Mote
Ultralow Power Mote, 72-Lead 10mm × 10mm QFN
LTC2379-18
18-Bit, 1.6Msps/1Msps/500ksps/250ksps Serial,
Low Power ADC
2.5V Supply, Differential Input, 101.2dB SNR, ±5V Input Range, DGC
LT6654
Precision High Output Drive Low Noise Reference
1.6ppm Peak-to-Peak Noise (0.1Hz to 10Hz, Sink/Source ±10mA, 5ppm/°C
Max Drift
5900whmfa
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA For
95035-7417
more information www.linear.com/LTP5900-WHM
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com/LTP5900-WHM
LT 0116 REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 2014