DNT90CA
DNT90PA
Rating Value Units
Power Supply Input -0.5 to +6.5 V
All Input/Output Pins -0.5 to +3.3 V
Non-Operating Ambient Temperature Range -40 to +85 oC
DNT90CA/PA Absolute Maximum Ratings
DNT90CA/PA Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Operating Frequency Range 902.76 927.24 MHz
Hop Duration 1 8 100 ms
Number of RF Channels 1 25, 26 or 52
Modulation FSK
RF Data Transmission Rate 100 kbps
Receiver Sensitivity @ 10-5 BER -100 dBm
Transmitter RF Output Power 1 40 or 158 mW mW
Antenna 0 dBi Dielectric Chip Antenna
System Topologies Point-to-Point, Point-to-Multipoint,
Peer-to-Peer and Store & Forward
Access Scheme Ad Hoc TDMA
Low Cost
900 MHz FHSS
Transceiver
Module with
I/O
The DNT90CA and DNT90PA FHSS transceiver modules provides a low-cost, versatile solu-
tion for wireless data communications in the 900 MHz ISM band. The DNT90CA/PA RF out-
put power can be set at 40 or 158 mW. The DNT90CA/PA receiver input is protected by a
low-loss SAW filter, providing an excellent combination of receiver sensitivity and out-of-band
interference rejection. The DNT90CA/PA modules include analog, digital and serial I/O, pro-
viding the flexibility to serve applications ranging from cable replacements to sensor net-
works. The built-in chip antenna makes these modules very easy to integrate.
- 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
- Built-in 0 dBi Chip Antenna
- 100 kbps RF Data Rate
- 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
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Notes:
1. The DNT90CA/PA achieves regulatory certification under FHSS rules.
2. Maximum sleep current occurs at +85 oC.
Characteristic Sym Notes Minimum Typical Maximum Units
ADC Input Range 0 2.7 V
ADC Input Resolution 12 bits
ADC Sample Rate 100 Hz
Signal Source Impedance for ADC Reading 10 KΩ
ADC External Reference Voltage Range 1.0 2.7 V
DAC Output Range 0 3.3 V
DAC Output Resolution 12 bits
Primary and Diagnostic Serial Port Baud Rates 1.2, 2.4, 4.8, 9.6, 14.4, 19.2, 28.8,
38.4, 57.6, 115.2, 230.4, 250.0 kbps
Serial Peripheral Interface Data Rate 125 500 kbps
Digital I/O:
Logic Low Input Level -0.5 0.8 V
Logic High Input Level 2.45 3.3 V
Logic Input Internal Pull-up Resistor 20 KΩ
Power Supply Voltage Range VCC +3.3 +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 6 µA
DNT90CA Mounting Reflow Soldering
DNT90PA Mounting Socket
Operating Temperature Range -40 85 oC
Operating Relative Humidity Range, Non-condensing 10 90 %
DNT90CA/PA Electrical Characteristics
CAUTION: Electrostatic Sensitive Device. Observe precautions when handling.
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DNT90CA/PA Hardware
The major components of the DNT90CA/PA series radios
include an RFM TRC103 900 MHz FHSS transceiver, and
a low current 8-bit microcontroller. DNT90CA/PA radios
operate 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. DNT90CA/PA radios also have two select-
able output power levels: +16 dBm (40 mW) and +22 dBm
(158 mW).
The DNT90CA/PA receiver is protected by a low-loss SAW
filter, providing an excellent blend of receiver sensitivity
and out-of-band interference rejection. All DNT90CA/PA
configurations include a built-in chip antenna that simplifies
integrating a DNT90CA/PA module into an application.
DNT90PA/CA radios provide a variety of hardware inter-
faces. 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 sup-
port most standard baud rates up to 250 kbps. The SPI
port supports data rates up to 500 kbps. DNT90CA/PA ra-
dios also include 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
configured as inputs. DNT90A radios are available in two
mounting configurations. The DNT90CA is designed for
solder reflow mounting. The DNT90PA is designed for
plug-in connector mounting.
DNT90CA/PA Firmware
DNT90CA/PA firmware operates using Ad Hoc TDMA
channel access optimized for periodic burst transmissions.
DNT90CA/PA firmware operates “out of the box” using
point-to-point transparent serial mode, with point-to-multi-
point, peer-to-peer and store & forward system topologies
also supported.
DNT90CA/PA firmware provides the user with a rich set of
configuration options including a choice of hopping pat-
terns, hopping dwell times, serial and/or SPI data port op-
eration, 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 re-
dundant transmissions. 128-bit AES encryption provides a
high level of data security for sensitive applications. Sen-
sor networks can take advantage of timer or event-based
data reporting and remote node sleep cycling for extended
battery life.
1 8 1 9 2 0 2 1 2 2 2 311 6 2 4 2 5 2 6
1 5
1 4
1 3
1 2
1 1
1 0
9
8
6
5
N T 9 0 C A / P A B l o c k i a g r a m
2
M i c r o c o n t r o l l e r
4
3
2
1
R e g
G N
A C T ( I A G _ T X )
/ C ( I A G _ R X )
G P I O 0
R A I O _ T X
R A I O _ R X
G P I O 4 ( / H O S T _ C T S )
G P I O 5 ( / H O S T _ R T S )
A C 0
G P I O 2
G P I O 1
G P I O 3 ( A V )
A C 1
V C C
G N
G N
/ R E S E T
A C 1
M I S O
M O S I
/ S S
S C L K
3 . 3 V _ O U T
A C _ E X T _ R E
A C 0
+ 3 . 3 V
2 8 2 9 3 0
G N
G N
R S V
T R C 1 0 3
I R Q 0
I R Q 1 / C L K
A T A
P L L _ L O C K
S C K
S I
S O
n S S _ A T A
n S S _ C O N F I G
S A W F i l t e r
a n d
P o w e r A m p
R S V
R S V
C h i p
A n t e n n a
Figure 1
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Pin Name I/O Description
1GND - Power supply and signal ground. Connect to the host circuit board ground.
2ACT
(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 di-
agnostic 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 registra-
tion 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.
4GPIO0 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.
5 RADIO_TXD O Serial data output from the radio.
6RADIO_RXD I Serial data input to the radio.
7GPOI4
(/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.
8GPOI5
(/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.
9DAC0 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 oper-
ation 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 differ-
ential 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 mea-
surements, 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 measure-
ments are 12-bit signed values.
19 ADC1 IADC input 1. Direct input when the ADC is operating in single-ended mode, positive differential input rela-
tive 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.
DNT90CA/PA I/O Descriptions
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Pin Name I/O Description
23 SCLK I/O SPI clock signal. This pin is an output when operating as a master, and an input when operating as
a slave.
24 ADC2 IADC input 2. Direct input when the ADC is operating in single-ended mode, positive differential input rela-
tive 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 out-
put 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.
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1 . 8 0 0
( 5 . 7 )
0 . 9 8 0
( 2 . 9 )
N T 9 0 C A O u t l i n e a n d M o u n t i n g i m e n s i o n s
0 . 0 5 0 ( 1 . 2 7 )
1
T o p V i e w
0 . 1 2 5
( 3 . 1 8 )
1 5
1 6 3 0
i m e n s i o n s i n i n c h e s ( m m )
0 . 0 8 0
0 . 5 0 ( 1 1 . )
A n t e n n a
0 . 6 5 0 ( 1 6 . 5 )
Figure 2
0 . 0 6 0 ( 1 . 5 2 )
1 . 8 0 0 ( 5 . 7 )
0 . 9 8 0
( 2 . 9 )
N T 9 0 C A S o l d e r P a d i m e n s i o n s
0 . 0 5 0 ( 1 . 2 7 )
1
T o p V i e w
1 5
1 6 3 0
i m e n s i o n s i n i n c h e s ( m m )
0 . 0 3 5 ( 0 . 8 9 )
1 . 0 0
( 2 6 . )
0 . 5 0 ( 1 1 . )
Figure 3
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0.980
( 2 . 9 )
0.050
( 1 . 2 7 )
0.700
( 1 7 . 8 )
0.100
( 2 . 5 )
0.800
( 2 0 . 3 )
N T 9 0 P A I n t e r f a c e C o n n e c t o r
P C B L a y o u t e t a i l
C o n n e c t o r s a r e S A M T E C
S L M - 1 1 5 - 0 1 - G - S
o r E q u i v a l e n t
i m e n s i o n s a r e i n i n c h e s ( m m )
Figure 5
Note: Specifications subject to change without notice.
Part # M-0090-0000A, Rev A
1 . 8 0 0
( 5 . 7 )
1 . 1 0 0
( 2 7 . 9 )
N T 9 0 P A O u t l i n e a n d M o u n t i n g i m e n s i o n s
0 . 0 5 0 ( 1 . 2 7 )
1
T o p V i e w
0 . 1 2 5
( 3 . 1 8 )
1 5
1 6 3 0
i m e n s i o n s i n i n c h e s ( m m )
0 . 5 0 ( 1 1 . )
0 . 0 8 0
( 2 . 0 3 )
0 . 2 2 5
( 5 . 7 2 )
0 . 9 8 0
( 2 . 9 )
0 . 6 5 0 ( 1 6 . 5 )
A n t e n n a
0 . 1 0 0
( 2 . 5 )
Figure 4
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