Murata DNT90P Low cost 900 mhz fhss transceiver module with i/o Datasheet

DNT90
- 900 MHz Frequency Hopping Spread Spectrum Transceiver
- Point-to-point, Point-to-multipoint, Peer-to-peer and
Store & Forward Capabilities
- Transmitter Power Configurable to 40 or 158 mW
- 100 kbps RF Data Rate
- Serial Port Data Rate up to 250 kbps, SPI Port Data Rate up to 500 kbps
- 128-Bit AES Encryption
- Separate Serial Port for Diagnostics
- Analog and Digital I/O for Sensor Applications
- FCC and Canadian IC Certified for Unlicensed Operation
Low Cost
900 MHz FHSS
Transceiver
Module with
I/O
The DNT90 FHSS transceiver module provides a low-cost, versatile solution for wireless data communications in the 900 MHz ISM band. The DNT90 RF output power can be set at 40 or 158 mW.
The DNT90 receiver input is protected by low-loss SAW filter, providing an excellent combination of
receiver sensitivity and out-of-band interference rejection. The DNT90 module includes analog, digital and serial I/O, providing the flexibility to serve applications ranging from cable replacements to
sensor networks. The DNT90 transceiver module is easy to integrate and provides reliable wireless
communications up to 5 miles in line-of-sight installations.
DNT90 Absolute Maximum Ratings
Rating
Value
Units
Power Supply Input
-0.5 to +6.5
V
All Input/Output Pins
-0.5 to +3.3
V
0
dBm
Input Power to RFIO Port
Non-Operating Ambient Temperature Range
-40 to +85
o
C
DNT90 Electrical Characteristics
Characteristic
Sym
Notes
Operating Frequency Range
Hop Duration
1
Number of RF Channels
1
Modulation
Minimum
Maximum
Units
902.76
Typical
927.24
MHz
8
100
ms
25, 26 or 52
FSK
RF Data Transmission Rate
100
kbps
Receiver Sensitivity @ 10-5 BER
-100
dBm
40 or 158 mW
mW
50
Ω
Transmitter RF Output Power
Optimum Antenna Impedance
RF Connection
System Topologies
Access Scheme
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© 2010-2012 by RF Monolithics, Inc.
1
U.FL Coaxial Connector
Point-to-Point, Point-to-Multipoint,
Peer-to-Peer and Store & Forward
Ad Hoc TDMA
Page 1 of 7
DNT90 - 11/06/12
DNT90 Electrical Characteristics
Characteristic
Sym
Notes
ADC Input Range
Minimum
Typical
0
ADC Input Resolution
ADC Sample Rate
Maximum
Units
2.7
V
12
bits
100
Signal Source Impedance for ADC Reading
ADC External Reference Voltage Range
DAC Output Range
Hz
10
KΩ
1.0
2.7
V
0
3.3
V
12
bits
DAC Output Resolution
1.2, 2.4, 4.8, 9.6, 14.4, 19.2, 28.8,
38.4, 57.6, 115.2, 230.4, 250.0
Primary and Diagnostic Serial Port Baud Rates
Serial Peripheral Interface Data Rate
kbps
125
500
kbps
Logic Low Input Level
-0.5
0.8
V
Logic High Input Level
2.45
3.3
V
Digital I/O:
Logic Input Internal Pull-up Resistor
Power Supply Voltage Range
20
VCC
+3.3
KΩ
+5.5
Vdc
Power Supply Voltage Ripple
10
mVP-P
Peak Transmit Mode Current, 158 mW Output
170
mA
Average Operating Receive Current:
Base, Continuous Data Stream
110
mA
Remote, Linked, No Data Transmission
15
mA
Remote, Continuous Data Stream
25
mA
Sleep Current
2
3
DNT90C Mounting
6
µA
Reflow Soldering
DNT90P Mounting
Socket
Operating Temperature Range
-40
85
o
Operating Relative Humidity Range, Non-condensing
10
90
%
C
Notes:
1. The DNT90 achieves regulatory certification under FHSS rules.
2. Maximum sleep current occurs at +85 oC.
CAUTION: Electrostatic Sensitive Device. Observe precautions when handling.
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© 2010-2012 by RF Monolithics, Inc.
Page 2 of 7
DNT90 - 11/06/12
D N T 9 0 B lo c k D ia g r a m
1
G N D
2
A C T (D IA G _ T X )
/D C D
3
(D IA G _ R X )
IR Q 0
4
G P IO 0
R A D IO _ T X D
5
R A D IO _ R X D
6
IR Q 1 /D C L K
D A T A
G P IO 4 (/H O S T _ C T S )
7
G P IO 5 (/H O S T _ R T S )
8
D A C 0
9
P L L _ L O C K
G P IO 2
1 0
G P IO 1
1 1
G P IO 3 (D A V )
1 2
D A C 1
1 3
V C C
1 4
G N D
1 5
+ 3 .3 V
S C K
M ic r o c o n tr o lle r
S D I
T R C 1 0 3
S A W
F ilte r
a n d
P o w e r A m p
S D O
n S S _ D A T A
n S S _ C O N F IG
R e g
2 8
2 9
3 0
G N D
2 7
G N D
2 6
R S V D
2 5
R S V D
2 4
A D C _ E X T _ R E
M O S I
2 3
R S V D
A D C 1
2 2
3 .3 V _ O U T
2 1
/S S
2 0
S C L K
1 9
M IS O
1 8
/R E S E T
G N D
1 7
A D C 0
1 6
Figure 1
DNT90 Hardware
The major components of the DNT90 include an RFM
TRC103 900 MHz FHSS transceiver, and a low current
8-bit microcontroller. The DNT90 operates in the 902 to
928 MHz ISM band. There are three selectable hopping
patterns providing compatibility with frequency allocations
in North America, South America and Australia. The
DNT90 also has two selectable RF output power levels:
+16 dBm (40 mW) and +22 dBm (158 mW).
The DNT90 receiver is protected by a low-loss SAW filter,
providing an excellent blend of receiver sensitivity and
out-of-band interference rejection that is especially important in outdoor applications.
The DNT90 provides a variety of hardware interfaces.
There are two serial ports plus one SPI port. Either the primary serial port or the SPI port can be selected for data
communications. The second serial port is dedicated to diagnostics. The primary and diagnostic serial ports support
most standard baud rates up to 250 kbps. The SPI port
supports data rates up to 500 kbps. The DNT90 also includes three ADC inputs, two DAC outputs, and six general-purpose digital I/O ports. Four of the digital I/O ports
support an optional interrupt-from-sleep mode when con-
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© 2010-2012 by RF Monolithics, Inc.
figured as inputs. The radio is available in two mounting
configurations. The DNT90C is designed for solder reflow
mounting. The DNT90P is designed for plug-in
connector mounting.
DNT90 Firmware
DNT90 firmware operates using hybrid Ad Hoc TDMA
channel access optimized for periodic burst transmissions.
DNT90 firmware operates “out of the box” using point-topoint transparent serial mode, with point-to-multipoint,
peer-to-peer and store & forward system topologies also
supported.
DNT90 firmware provides the user with a rich set of configuration options including a choice of hopping patterns,
hopping dwell times, serial and/or SPI data port operation,
serial and SPI data rate selection, RF output power selection, plus configurable analog and digital I/O lines. Data
integrity is protected by 24-bit error detection, with optional
ACK and automatic transmission retries or redundant
transmissions. 128-bit AES encryption provides a high
level of data security for sensitive applications. Sensor networks can take advantage of timer or event-based data
reporting and remote node sleep cycling for extended battery life.
Page 3 of 7
DNT90 - 11/06/12
DNT90 I/O Descriptions
Pin
Name
I/O
1
GND
-
2
ACT
(DIAG_TX)
O
(O)
This pin’s default configuration is data activity output. On a base, this signal blinks when a valid packet is
received. On a remote, this signal blinks when a packet is transmitted. On a router, this signal blinks when
a valid upstream packet is received or a downstream packet is transmitted. Alternate pin function is the diagnostic serial port output.
3
/DCD
(DIAG_RX)
O
(I)
This pin’s default configuration is data carrier detect output. On a base, this signal is asserted when any
valid packet is received, and is cleared if no packets are heard for the configured router/remote registration time-out interval. On a router or remote, this signal is asserted when the radio obtains hopping pattern
synchronization, and remains asserted until no beacons are heard for 50 hops. Alternate pin function is
the diagnostic serial port input.
I/O
Configurable digital I/O port 0. When configured as an input, an internal pull-up resistor can be selected
and direct interrupt from sleep can be invoked. When configured as an output, the power-on state is
configurable. In sleep mode the pin direction, input pull-up selection or output state are also separately
configurable.
4
GPIO0
Description
Power supply and signal ground. Connect to the host circuit board ground.
5
RADIO_TXD
O
Serial data output from the radio.
6
RADIO_RXD
I
Serial data input to the radio.
7
GPOI4
(/HOST_CTS)
I/O
(O)
Default pin function is GPIO4 with the same configuration options as GPIO2. Alternate pin function is
UART/SPI flow control output. The module sets this line low when it is ready to accept data from the host
on the RADIO_RXD or MOSI input. When the line goes high, the host must stop sending data.
8
GPOI5
(/HOST_RTS)
I/O
(I)
Default pin function is GPIO5 with the same configuration options as GPIO2. Alternate pin function is
UART/SPI flow control input. The host sets this line low to allow data to flow from the module on
the RADIO_TXD pin. When the host sets this line high, the module will stop sending data to the host.
9
DAC0
O
12-bit DAC 0 output. Full scale output can be referenced to the voltage at pin 25 or the 3.3 V regulated
module bus voltage.
10
GPIO2
I/O
Configurable digital I/O port 2. Same configuration options as GPIO0.
11
GPIO1
I/O
Configurable digital I/O port 1. Same configuration options as GPIO0.
12
GPIO3
(DAV)
I/O
(O)
Default pin function is GPIO3 with the same configuration options as GPIO0. When SPI slave mode operation is enabled, a logic high on this pin indicates when data is available to be clocked out by the SPI
master.
13
DAC1
O
12-bit DAC 1 output. Same specifications and configuration options as DAC0.
14
VCC
I
Power supply input, +3.3 to +5.5 Vdc.
15
GND
-
Power supply and signal ground. Connect to the host circuit board ground.
16
GND
-
Power supply and signal ground. Connect to the host circuit board ground.
17
/RESET
I
Active low module hardware reset.
18
ADC0
I
ADC input 0. This pin is a direct ADC input when the ADC is operating in single-ended mode, or the differential negative input for positive inputs applied to ADC1 or ADC2 when the ADC is operating in differential
mode. Full-scale reading can be referenced to Pin 25 for ratiometric measurements. For absolute measurements, the ADC can use the regulated supply voltage divided by 1.6 (about 2.06 V), or an external
voltage applied to Pin 25. In single-ended mode, ADC measurements are 11-bit unsigned values with full
scale nominally 2.7 V when referenced to a 2.7 V input on Pin 27. In differential mode, ADC measurements are 12-bit signed values.
19
ADC1
I
ADC input 1. Direct input when the ADC is operating in single-ended mode, positive differential input relative to ADC0 when the ADC is operating in differential mode.
20
MISO
I/O
This pin is the SPI master mode input or slave mode output.
21
MOSI
I/O
This pin is the SPI master mode output or slave mode input.
22
/SS
I/O
SPI active low slave select. This pin is an output when the module is operating as a master, and an input
when it is operating as a slave.
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© 2010-2012 by RF Monolithics, Inc.
Page 4 of 7
DNT90 - 11/06/12
Pin
Name
I/O
Description
23
SCLK
I/O
24
ADC2
I
ADC input 2. Direct input when the ADC is operating in single-ended mode, positive differential input relative to ADC0 when the ADC is operating in differential mode.
25
ADC_EXT_
REF
I/O
ADC external reference voltage pin. The voltage at this pin can be used by the ADCs as a reference for
ratiometric measurements. With no external voltage or load applied, this pin presents a nominal 2.7 V output through a 2.126 K source resistance. A low impedance external reference voltage in the range of 1 to
2.7 V may be applied to this pin as an option.
26
RSVD
-
Reserved pin. Leave unconnected.
27
RSVD
-
Reserved pin. Leave unconnected.
28
GND
-
Connect to the host circuit board ground plane.
29
RSVD
-
Reserved pin. Leave unconnected.
30
GND
-
Connect to the host circuit board ground plane.
SPI clock signal. This pin is an output when operating as a master, and an input when operating as
a slave.
DNT90 Antenna Connector
A U.FL miniature coaxial connector is provided on both DNT90 configurations for connection to the RFIO port. A
short U.FL coaxial cable can be used to connect the RFIO port directly to an antenna. In this case the antenna
should be mounted firmly to avoid stressing the U.FL coaxial cable due to antenna mounting flexure. Alternately,
a U.FL coaxial jumper cable can be used to connect the DNT90 module to a U.FL connector on the host circuit
board. The connection between the host circuit board U.FL connector and the antenna or antenna connector on
the host circuit board should be implemented as a 50 ohm stripline. Referring to Figure 2, the width of this stripline
depends on the thickness of the circuit board between the stripline and the groundplane. For FR-4 type circuit
C ir c u it B o a r d S tr ip lin e T r a c e D e ta il
C o p p e r
S tr ip lin e
T ra c e
C o p p e r
G ro u n d
P la n e
F R -4 P C B
M a te r ia l
Trace Separation from
50 ohm Microstrip
Length of Trace Run
Parallel to Microstrip
100 mil
125 mil
150 mil
200 mil
200 mil
290 mil
250 mil
450 mil
300 mil
650 mil
Figure 3
F o r 5 0 o h m
im p e d a n c e W
= 1 .7 5 * H
Figure 2
board materials (dielectric constant of 4.7), the width of the stripline is equal to 1.75 times the thickness of the circuit board. Note that other circuit board traces should be spaced away from the stripline to prevent signal coupling, as shown in Figure 3. The stripline trace should be kept short to minimize its insertion loss.
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© 2010-2012 by RF Monolithics, Inc.
Page 5 of 7
DNT90 - 11/06/12
D N T 9 0 C O u tlin e a n d M o u n tin g D im e n s io n s
1 .4 5 0
(3 6 .8 )
0 .0 5 0 (1 .2 7 )
1
1 5
0 .9 8 0
(2 7 .9 )
T o p V ie w
1 6
3 0
0 .4 5 0 (1 1 .4 )
0 .3 0 0 (7 .6 2 )
0 .1 2 5
(3 .1 8 )
0 .0 9 0
D im e n s io n s in in c h e s (m m )
Figure 4
D N T 9 0 C S o ld e r P a d D im e n s io n s
1 .4 5 0 (3 6 .8 )
0 .0 5 0 (1 .2 7 )
0 .0 6 0 (1 .5 2 )
1 5
1
0 .0 3 5 (0 .8 9 )
0 .9 8 0 1 .0 4 0
(2 4 .9 ) (2 6 .4 )
T o p V ie w
1 6
3 0
D im e n s io n s in in c h e s (m m )
Figure 5
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© 2010-2012 by RF Monolithics, Inc.
Page 6 of 7
DNT90 - 11/06/12
D N T 9 0 P O u tlin e a n d M o u n tin g D im e n s io n s
1 .4 5 0
(3 6 .8 )
0 .0 5 0 (1 .2 7 )
0 .0 6 0
(1 .5 2 )
1 5
0 .9 8 0
(2 4 .9 )
1
1 .1 0 0
(2 7 .9 )
T o p V ie w
1 6
3 0
0 .4 5 0 (1 1 .4 )
0 .3 0 0 (7 .6 2 )
0 .1 2 5
(3 .1 8 )
0 .0 9 0
(2 .2 9 )
0 .2 2 5
(5 .7 2 )
D im e n s io n s in in c h e s (m m )
Figure 6
0 .1 0 0
(2 .5 4 )
D N T 9 0 P In te r fa c e C o n n e c to r
P C B L a y o u t D e ta il
0 .0 5 0
(1 .2 7 )
0 .8 0 0
(2 0 .3 )
C o n n e c to rs a re S A M T E C
S L M -1 1 5 -0 1 -G -S
o r E q u iv a le n t
0 .7 0 0
(1 7 .8 )
0 .9 8 0
(2 4 .9 )
D im e n s io n s a r e in in c h e s (m m )
Figure 7
Note: Specifications subject to change without notice.
Part # M-0090-0000, Rev B
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© 2010-2012 by RF Monolithics, Inc.
Page 7 of 7
DNT90 - 11/06/12
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