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Summary of Contents for Linx NT Series
- Page 1 NT Series Transceiver Module Data Guide...
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Page 2: Table Of Contents
Pin Descriptions Sending Data Do not use this or any Linx product to trigger an action directly The Data Input from the data line or RSSI lines without a protocol or encoder/ decoder to validate the data. Without validation, any signal from... -
Page 3: Description
General Antenna Rules Common Antenna Styles Regulatory Considerations 1.150" Description Achieving a Successful RF Implementation The NT Series transceiver module is designed Helpful Application Notes From Linx for bi-directional wireless data transfer. The 0.630" NT Series Transceiver NT Series Transceiver... -
Page 4: Ordering Information
868MHz NT Series Transceiver Operating Voltage TRM-900-NT 900MHz NT Series Transceiver TX Supply Current MDEV-868-NT 868MHz NT Series Master Development System CCTX At +12.5dBm MDEV-900-NT 900MHz NT Series Master Development System Transceivers are supplied in tubes of 18 pcs. At 0dBm... - Page 5 NT Series Transceiver Specifications NT Series Transceiver Specifications Parameter Symbol Min. Typ. Max. Units Notes Parameter Symbol Min. Typ. Max. Units Notes RSSI Logic Low Dynamic Range Logic High –0.4 0.5*V Transmitter Section POWER_DOWN Output Power −15.5 +12.5 Logic Low...
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Page 6: Typical Performance Graphs
Typical Performance Graphs +85°C -40°C +25°C Supply Voltage (V) LVL_ADJ Resistance (k ) Figure 8: NT Series Transceiver TX Current Consumption vs. Supply Voltage at +12.5dBm Figure 5: NT Series Transceiver Output Power vs. LVL_ADJ Resistance +85°C +25°C -40°C +25°C +85°C... - Page 7 1. 2.00V/div 2. 2.00V/div 570µs STANDBY READY 500µs/div Figure 14: NT Series Transceiver Turn-On Time from Standby Figure 11: NT Series Transceiver RSSI Voltage vs. Input Power 1. 2.00V/div 2. 2.00V/div 1. 2.00V/div 2. 2.00V/div 630µs 4.67ms STANDBY READY READY 500µs/div...
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Page 8: Module Description
300kbps. Its exceptional sensitivity results in outstanding T/R_SEL range performance. The module’s compact surface-mount package is friendly to automated or hand production. NT Series modules are capable of meeting the regulatory requirements of many domestic and international applications. -
Page 9: Pin Assignments
POWER_DOWN Command Data Out. Do not connect for normal CMD_DATA_OUT operation. Command Data Type. Pull low for normal CMD_DATA_TYPE Figure 21: NT Series Transceiver Pinout (Top View) operation. Command Data Baud. Pull low for normal Pin Descriptions CMD_DATA_BAUD operation. Received Data Output. This line outputs the... -
Page 10: Sending Data
Sending Data The Data Output The NT Series transceiver module has two interfaces for sending data. One Receive Mode is enabled when the T/R_SEL line is logic low. The interface uses a UART to pass data in and out of the module. The modules demodulated data is output on the DATA_OUT line. -
Page 11: Using The T/R_Sel Input
Using the T/R_SEL Input Using the READY Output The transmit/receive select (T/R_SEL) line is used to switch the transceiver The Ready (READY) line can be used to monitor the status of the module. between transmit and receive mode. If it is pulled low, the transceiver exits It is logic high while the transceiver is busy and logic low when the transmit mode and enters receive mode. -
Page 12: Baud Band Selection
−14.59 2.32k 868.35 −15.78 868.95 Figure 23: NT Series Transceiver Power Level vs. Resistor Value 869.55 869.85 Baud Band Selection There are two baud select lines (BAUD0 and BAUD1) that configure the Figure 25: NT Series Transceiver 868MHz Channel Selection transceiver for the desired over-the-air data rate. -
Page 13: European Transmission Rules
0.10% 869.15 0.10% transmit its data (AFA). 865.85 0.10% 869.25 0.10% The NT Series does not implement LBT or AFA, but these features can 865.95 0.10% 869.35 0.10% be added to a microcontroller outside the module. Implementing these 866.05 0.10% 869.45... -
Page 14: Typical Applications
Typical Applications Figure 28 shows the 900MHz channels avaiable through the module's serial Command Data Interface. Figure 29 shows a circuit using the NT Series transceiver. NT Series Transceiver 900MHz Serial Channels Channel Frequecy Channel Frequecy Channel Frequecy Channel Frequecy ANTENNA 902.62... -
Page 15: Power Supply Requirements
This offers the designer a great deal of flexibility in antenna The transceiver incorporates a precision Vcc TO selection and location within the end product. Linx offers cable assemblies low-dropout regulator which allows operation MODULE with a U.FL connector on one end and several types of standard and over a wide input voltage range. -
Page 16: Interference Considerations
Comparing your own design with a Linx evaluation board can help to determine if and at what level design-specific interference is present. -
Page 17: Microstrip Details
This is a critical factor, especially short or couple to traces on the product’s circuit board. in high-frequency products like Linx RF modules, because the trace The Pad Layout section shows a typical PCB footprint for the module. - Page 18 Washability Figure 36: Absolute Maximum Solder Times Automated Assembly The modules are wash-resistant, but are not hermetically sealed. Linx recommends wash-free manufacturing; however, the modules can be For high-volume assembly, the modules are generally auto-placed. subjected to a wash cycle provided that a drying time is allowed prior The modules have been designed to maintain compatibility with reflow to applying electrical power to the modules.
- Page 19 General Antenna Rules plane as possible in proximity to the base of the antenna. In cases where the antenna is remotely located or the antenna is not in close The following general rules should help in maximizing antenna performance. proximity to a circuit board, ground plane or grounded metal case, a metal plate may be used to maximize the antenna’s performance.
- Page 20 There are hundreds of antenna styles and variations that can be employed directly on a product’s PCB (Figure 44). This with Linx RF modules. Following is a brief discussion of the styles most makes it the most cost-effective of antenna commonly utilized.
- Page 21 Email: labinfo@fcc.gov and certification process. Here at Linx, our desire is not only to expedite the design process, but also to assist you in achieving a clear idea of what is...
- Page 22 RF design and application of the design and approval process is greatly Linx products. These applications notes are available online at TEST MODULE(S) WITH simplified. It is still important, however, to have www.linxtechnologies.com or by contacting the Linx literature department.
- Page 23 Under no circumstances shall any user be conveyed any license or right to the use or ownership of such items. ©2018 Linx Technologies. All rights reserved. The stylized Linx logo, Wireless Made Simple, WiSE, CipherLinx and the stylized CL logo are trademarks of Linx Technologies.
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