RFM DM1800

Preliminary
DM1800916MR
®
• Network Router
• Compatible with RFM miniMESHTM Network Protocol
• 3 V, Very Low Current Operation
• Ready-to-Use OEM Module
The DM1800-916MR is the 916.5 MHz router module in the DM1800 family of RF transceivers. The
DM1800 family is designed for adding embedded wireless connectivity to a wide range of monitoring and control systems. This module is compatible with RFM’s miniMESHTM network protocol,
which provides add-on “plug-and-play” multicast mesh network routing. Radio communications
range in an “open field” environment is typically 200 meters/hop. The DM1800-916MR combines
RFM’s very low current ASH radio technology with low power microcontroller technology to achieve
long battery life. The DM1800-916MB is certified for operation under FCC 15.249 regulations.
916.50 MHz
Transceiver
Module
Absolute Maximum Ratings
Rating
Value
All Input/Output Pins Except VIN
-0.3 to +3.3
Non-Operating Ambient Temperature Range
-50 to +100
Units
V
o
C
Electrical Characteristics
Characteristic
Sym
Operating Frequency
fO
Notes
Minimum
Typical
916.30
Modulation Type
Maximum
Units
916.70
MHz
OOK
RF Encoded Data Transmission Rate
Average Receiver Input Current, No External Power Supply Load
IR
Receiver Input Signal for 10 BER, 25 °C
-3
Peak Transmitter Input Current, No External Power Supply Load
ITP
Peak Transmitter Output Power
PO
Digital In Logic High
4.8
kb/s
4
mA
-98
dBm
13.5
1
mW
2.4
V
Digital In Logic Low
Power Supply Input Voltage Range, -40 to +85 oC
o
Power Supply Input Voltage Range, 0 to +85 C
Regulated Power Supply Output Voltage, VIN 3.1 to 14 V
.45
V
VIN
2.6
14
V
VIN
3.1
14
V
VOUT
Regulated Power Supply Voltage Ripple
3.0
Vdc
10
1
mA
mVP-P
D M 1 8 0 0 -9 1 6 M R
B lo c k D ia g r a m
J 1 -1 0
G N D
J 2 -3
J 2 -2
G N D
J 2 -1
A S H
T r a n s c e iv e r
C N T R L 0
J 1 -9
C N T R L 1
J 1 -8
R X D A T A
J 1 -7
T X M O D
L E D
L E D
G N D
P IC
1 6 F 6 8 8
µ P
J 1 -6
J 1 -5
3 V
R e g
1
2
J 1 -4
B IN D
J 1 -3
V O U T
J 1 -2
V IN
J 1 -1
G N D
Figure 1
Theory of Operation
WARNING: the DM1800-916MR must be re-certified
if used with any antennas other than the two listed
above. Contact RFM for further information if your application requires a special antenna configuration.
The major components of the DM1800-916MR include
an RFM TR1000 ASH transceiver and a Microchip
PIC16F688 microcontroller. The TR1000 operates on
a frequency of 916.50 MHz, at a nominal output power
of 1 mW. The DM1800 includes two LEDs that indicate the module’s operating mode.
FCC Notices and Labels
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference,
and (2) this device must accept any interference received, including interference that may cause undesired operation.
The DM1800-916MR is compatible with RFM’s
miniMESHTM network protocol, which provides add-on
“plug-and-play” mesh network routing to improve communication range and robustness.
DM1800-916MR FCC Certification
A clearly visible label is required on the outside of the
user’s (OEM) enclosure stating that this product contains a DM1800-916MR transceiver assembly, FCC
ID: TE6-DM1800.
The DM1800-916MR hardware has been certified for
operation under FCC Part 15 Rules, Section 15.249.
This certification applies only when a DM1800-916MR
is equipped with one of the following RFM antennas:
WARNING: This device operates under Part 15 of the
FCC rules. Any modification to this device, not expressly authorized by RF Monolithics, Inc., may void
the user’s authority to operate this device.
helical antenna, RFM part number 500-1195-003
helical antenna, RFM part number 500-1195-103
2
DM1800-916MR I/O Pad Descriptions
Pin
Name
Description
J1-1
GND
This pad is a signal and power supply ground.
J1-2
VIN
This is the power supply input pad. The allowed input voltage range is 2.6 to 14 V.
J1-3
VOUT
VOUT tracks 50 to 100 mV below VIN when VIN is in the range of 2.6 to 3.1 V. When VIN is in the range of 3.1
to 14 V, VOUT is regulated at 3.0 Vdc. Up to 10 mA can be supplied from this pad for powering external circuits
such as thermistor-resistor networks. External circuitry must not impress more than 10 mVp-p ripple on the regulated output voltage.
J1-4
BIND
This pad is connected to a logic input on the microcontroller, and is configured with a weak pull-up. When this pin
is momentarily grounded (to J1-1 or J1-10, the module is placed into the bind mode, allowing this module to be
associated with other modules to form a network.
J1-10
GND
This pad is a signal and power supply ground.
J2-1
GND
This pad is a ground for the antenna port.
J2-2
ANT
This pad is the antenna port.
J2-3
GND
This pad is a ground for the antenna port.
3
D M 1 8 0 0 -9 1 6 M R I/O
P a d L a b e ls
G N D
S E R IA L T X
S E R IA L R X
G N D
D IG IT A L O U T
A N A L O G
R F IO
IN
D IG IT A L IN
B IN D
G N D
V O U T
V IN
G N D
Figure 2
D M 1 8 0 0 -9 1 6 M R S M T M o u n tin g P a tte r n
1 .5 3 5
.0 8 0
.0 5 0
.0 9 0
.0 7 0 T Y P
.2 0 0
1 .0 0 0
.1 3 0
.2 0 0
.1 0 0 T Y P
.0 9 0
.0 9 5
D im e n s io n s in in c h e s . P C B p lu s c o m p o n e n t h e ig h t is .1 7 0 m a x ;
P C B p lu s a n te n n a h e ig h t is 1 .1 5 m a x
Figure 3
Note: Specifications subject to change without notice.
file: dm1800_916rk.vp, 2005.12.07 rev
4