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DNT900 900 MHz FHSS Transceiver Module with I/O
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Low Cost 900 MHz Frequency Hopping
Multi-Function Wireless Module
- 900 MHz Frequency Hopping Spread Spectrum Transceiver
- Point-to-Point and Point-to-Multipoint Network Topologies
- Transmitter Power Configurable from 1 mW to 1 W
- RF Data Rate Configurable from 38.4 to 500 kbps
- Serial Port Rate up to 460.8 kbps for Streaming Applications
- 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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- Features
- Specifications
- Software
- Development Kit
- Compare
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The DNT900 series transceivers provide highly reliable wireless connectivity for either point-to-point or
point-to-multipoint applications.
Frequency hopping spread spectrum (FHSS) technology ensures maximum
resistance to multipath fading and robustness in the presence of interfering signals, while operation
in the 900 MHz ISM band allows license-free use in the US, Canada, South America, Israel, Australia and
New Zealand. The DNT900 supports all standard serial data rates for host communications from 1.2 to
460.8 kb/s. On-board data buffering and an error-correcting air protocol provide smooth data flow and
simplify the task of integration with existing applications. Key DNT900 features include:
- Multipath fading resistant frequency hopping technology with up to 50 frequency channels (902 to 928 MHz).
- Selectable 1, 10, 100, 250, 500 or 1000 mW transmit power with a firmware interlock of 85 mW maximum for 500 kb/s operation.
- Support for point-to-point or point-to-multipoint applications.
- AES-128 encryption secures data
- FCC 15.247 certified for license-free operation.
- Separate Serial Port for Diagnostics
- 40 mile plus range with omni-directional antennas (antenna height dependent).
- Dynamic TDMA slot assignment that maximizes throughput and CSMA modes that maximizes network size.
- Transparent ARQ protocol with data buffering ensures data integrity
- Simple serial interface handles both data and control at up to 460.8 kb/s
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DNT900 Transceiver Module
Absolute Maxium Ratings
| Rating |
Value |
Units |
| All Input/Output Pins |
-0.5 to +3.3 |
V |
| Non-Operating Ambient Temperature Range |
-40 to +85 |
°C |
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Electrical Characteristics
| Characteristic |
Sym |
Notes |
Min |
Typ |
Max |
Units |
| Operating Frequency Range |
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902.75 |
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927.25 |
MHz |
| Hop Dwell Time |
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5 |
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200 |
ms |
| Number of RF Channels |
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50 |
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| Modulation |
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FSK |
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| RF Data Transmission Rates |
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1 |
38.4, 115.2, 200 and 500 |
kbps |
| Receiver Sensitivity 10-5 BER @ 38.4 kbps |
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-108 |
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dBm |
| Receiver Sensitivity 10-5 BER @ 200 kbps |
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-98 |
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dBm |
| Receiver Sensitivity 10-5 BER @ 500 kbps |
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-94 |
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dBm |
| Transmitter RF Output Power Levels |
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1 |
1, 10, 100, 250, 500, 1000 at 38.4 to 200 kbps
1, 10, 85 at 500 kbps |
mW |
| Optimum Antenna Impedance |
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50 |
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| RF Connection |
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DNT900P - U.FL Coaxial Connector
DNT900C - U.FL Connector or PCB Pad |
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| Network Topologies |
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Point-to-Point, Point-to-Multipoint |
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| Access Schemes |
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CSMA and TDMA |
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| Number of Network Nodes (TDMA Mode) |
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16 |
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| Number of Network Nodes (CSMA Mode) |
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unlimited |
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| ADC Input Range |
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0 |
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3.3 |
V |
| ADC Input Resolution |
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10 |
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bits |
| ADC Sample Rate |
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10 |
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ms |
| Signal Source Impedance for ADC Reading |
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10 |
K |
| PWM (DAC) Output Range |
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0 |
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3.3 |
V |
| PWM (DAC) Output Resolution |
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2 |
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8 |
bits |
| PWM Output Period |
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20 |
|
us |
| Primary Serial Port Baud Rates |
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1.2, 2.4, 4.8, 9.6, 19.2, 28.8, 38.4, 57.6, 76.8, 115.2, 230.4, 460.8 |
kbps |
| Diagnostic Serial Port Baud Rates |
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115.2 |
kbps |
| Digital I/O: Logic Low Input Level |
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-0.5 |
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0.8 |
V |
| Digital I/O: Logic High Input Level |
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2 |
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3.3 |
V |
| Digital I/O: Logic Input Internal Pull-up Resistor |
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50 |
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200 |
K |
| Digital I/O: Logic Input Internal Pull-down Resistor |
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50 |
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180 |
K |
| Power Supply Voltage Range |
Vcc |
|
+3.3 |
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+5.5 |
Vdc |
| Power Supply Voltage Ripple |
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10 |
mVp-p |
| Peak Transmit Mode Current, 1 W Output |
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900 |
mA |
| Average Operating Current: Base |
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105 |
|
mA |
| Average Operating Current: Remote, No Data Transmission |
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35 |
|
mA |
| Average Operating Current: Remote, 9.6 kbps Continuous Data Stream |
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40 |
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mA |
| Average Operating Current: Remote, 115.2 kbps Continuous Data Stream |
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53 |
|
mA |
| Sleep Current |
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50 |
uA |
| DNT900C Mounting |
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Reflow Soldering |
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| DNT900P Mounting |
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Socket |
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| Operating Temperature Range |
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-40 |
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85 |
°C |
| Operating Relative Humidity Range, Non-condensing |
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10 |
|
90 |
% |
Notes:
1. The DNT900 achieves regulatory certification under FHSS rules at air data rates of 38.4, 115.2 and 200 kbps. At 500 kbps,
the DNT900 achieves regulatory certification under “digital modulation” or DTS rules. The DNT900 still employs frequency
hopping at 500 kbps to mitigate the effects of interference and multipath fading, but hops on fewer, more widely spaced
frequencies than at lower data rates. Maximum RF power at 500 kbps is 85 mW.
2. PWM is set with an 8-bit value. DAC resolution is limited to 7 bits by residual ripple at output of low-pass filter. |
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DNT900 Development Kit includes the following utilities:
- DNT Throughput Calculator - A Windows-based utility that lets the designer try different parameter settings and see what the resultant performance will be.
- DNTWizard - A Windows-based utility that provides a simple means for the designer to configure and test DNT900 modules. Source code is included.
- DNTDemo - A Windows-based utility that demonstrates all of the DNT900's features and functions. Source code is included.
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$359 each DNT900DK Development Kit
How to Buy: RFM products are sold through a world-wide network of manufacturer's sales reps and distributors.
Go to www.RFM.com and visit our "How to Buy" section to locate a sales / distribution partner near you.
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RFM’s DNT900 is the best in class among all 900 MHz Transceivers.
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RFM products are sold through a world-wide network of manufacturer's sales reps and distributors.
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