TRM-315-LT

LT Series Transceiver Module Data Guide ! Warning: Some customers may want Linx radio frequency (“RF”) products to control machinery or devices remotely, including machinery or devices that can cause death, bodily injuries, and/or property damage if improperly or inadvertently triggered, particularly in industrial settings or other applications implicating life-safety concerns (“Life and Property Safety Situations”). Table of Contents 1^ 1^ 1^ NO OEM LINX REMOTE CONTROL OR FUNCTION MODULE SHOULD EVER BE USED IN LIFE AND PROPERTY SAFETY SITUATIONS. No OEM Linx Remote Control or Function Module should be modified for Life and Property Safety Situations. Such modification cannot provide sufficient safety and will void the product’s regulatory certification and warranty. 2^ Customers may use our (non-Function) Modules, Antenna and Connectors as part of other systems in Life Safety Situations, but only with necessary and industry appropriate redundancies and in compliance with applicable safety standards, including without limitation, ANSI and NFPA standards. It is solely the responsibility of any Linx customer who uses one or more of these products to incorporate appropriate redundancies and safety standards for the Life and Property Safety Situation application. 9^ Do not use this or any Linx product to trigger an action directly from the data line or RSSI lines without a protocol or encoder/ decoder to validate the data. Without validation, any signal from another unrelated transmitter in the environment received by the module could inadvertently trigger the action. All RF products are susceptible to RF interference that can prevent communication. RF products without frequency agility or hopping implemented are more subject to interference. This module does not have a frequency hopping protocol built in. Do not use any Linx product over the limits in this data guide. Excessive voltage or extended operation at the maximum voltage could cause product failure. Exceeding the reflow temperature profile could cause product failure which is not immediately evident. Do not make any physical or electrical modifications to any Linx product. This will void the warranty and regulatory and UL certifications and may cause product failure which is not immediately evident. 2^ 3^ 5^ 9^ 10^ 10^ 12^ 12^ 13^ 13^ 14^ 15^ 16^ 17^ 18^ 19^ 19^ 20^ 21^ 21^ 23^ 24^ 24^ 24^ Description Features Applications Ordering Information Absolute Maximum Ratings Electrical Specifications Typical Performance Graphs PIN Assignments Pin Descriptions Module Description Theory of Operation Using LADJ Using the RSSI Line Using the PDN Line ESD Concerns Using the Data Line Power Supply Requirements Transferring Data Typical Applications Antenna Considerations Helpful Application Notes from Linx Protocol Guidelines Interference Considerations Pad Layout Board Layout Guidelines Microstrip Details Production Guidelines Hand Assembly Automated Assembly  26^ General Antenna Rules 28^ Common Antenna Styles 30^ Regulatory Considerations LT Series Transceiver Module Data Guide Description 0.619" The LT Series transceiver is ideal for the bidirectional wireless transfer of serial data, control or command 0.630" TRM-433-LT information in the favorable 260–470MHz band. The LOT TX4xxx transceiver is capable of generating +10dBm into a 50-ohm load and achieves an outstanding typical sensitivity of –112dBm. Its advanced synthesized 0.125" architecture delivers outstanding stability and Figure 1: Package Dimensions frequency accuracy and minimizes the effects of antenna pulling. When paired, the transceivers form a reliable wireless link that is capable of transferring data at rates of up to 10,000bps over distances of up to 3,000 feet (1000m). Applications operating over shorter distances or at lower data rates will also benefit from increased link reliability and superior noise immunity. Housed in a tiny reflow-compatible SMD package, the transceiver requires no external RF components except an antenna, which greatly simplifies integration and lowers assembly costs. Features • • • • • • Long range Low cost PLL-synthesized architecture Direct serial interface Data rates up to 10,000bps No external RF components required • • • • • • Low power consumption Compact surface-mount package Wide temperature range RSSI and power-down functions No production tuning Easy to use • • Home/industrial automation Fire/security alarms/access control Remote status/position sensing Long-range RFID Wire elimination Applications • • • • • • • 2-way remote control Keyless entry Garage/gate openers Lighting control Medical monitoring/call systems Remote industrial monitoring Periodic data transfer • • • – 1 – Revised 3/18/2015 Ordering Information Electrical Specifications Ordering Information LT Series Transceiver Specifications Part Number Description Parameter TRM-315-LT 315MHz Transceiver Power Supply TRM-418-LT 418MHz Transceiver TRM-433-LT 433MHz Transceiver EVAL-***-LT Basic Evaluation Kit *** = 315, 418 (Standard), 433MHz Transceivers are supplied in tubes of 18 pcs. Symbol Min. Typ. Max. Units Operating Voltage VCC 2.1 3.0 3.6 VDC Supply Current lCC TX Mode Logic High 12 14 mA 1 TX Mode Logic High 7.6 9.5 mA 2 TX Mode Logic Low 4.0 5.0 mA 6.1 7.9 mA 11.5 20.0 µA 9,10 Receive Mode Figure 2: Ordering Information Power Down Current lPDN Notes DATA Line Absolute Maximum Ratings Absolute Maximum Ratings Output Low Voltage VOL 0.15 VDC 3 Output High Voltage VOH VCC–0.26 VDC 4 VDC 5 Supply Voltage Vcc −0.3 to +4.0 VDC Input Low Threshold VIL Any Input or Output Pin −0.3 to VCC + 0.3 VDC Input High Threshold VIH Operating Temperature −40 to +85 ºC Input Low Threshold VIL Storage Temperature −65 to +150 ºC Input High Threshold VIH RF Input 0 Soldering Temperature dBm +260ºC for 10 seconds Exceeding any of the limits of this section may lead to permanent damage to the device. Furthermore, extended operation at these maximum ratings may reduce the life of this device. Figure 3: Absolute Maximum Ratings Warning: This product incorporates numerous static-sensitive components. Always wear an ESD wrist strap and observe proper ESD handling procedures when working with this device. Failure to observe this precaution may result in module damage or failure. 0.1 VCC 0.9 VCC VDC Power Down Input 0.1 VCC 0.9 VCC VDC 5 VDC RF Section Frequency Range FC TRM-315-LT 315 MHz TRM-418-LT 418 MHz TRM-433-LT 433.92 MHz Center Frequency Accuracy –50 +50 kHz Data Rate 65 10,000 bps Receiver Section LO Feedthrough IF Frequency Noise Bandwidth Receiver Sensitivity –80 dBm 6,9 FIF 10.7 MHz 9 N3DB 280 kHz 9 dBm 7 dB 9 –108 –112 –118 RSSI / Analog Dynamic Range Analog Bandwidth – 2 – 80 Hz 9 Gain 20 15 mV/dB 9 Voltage with No Carrier 430 mV 9 – 3 – 5,000 Typical Performance Graphs LT Series Transceiver Specifications Continued Parameter Symbol Min. Typ. Max. Units Notes +9.2 +11 dBm 1,6 0.0 4 dBm 2,6 MAX dB 9 –36 dBc 6 10 9 Transmitter Section PO With a 750Ω resistor on LADJ PO Output Power Control Range Harmonic Emissions –4 –30 PH LADJ Resistance (kΩ) 8 Output Power RIN Ω 50 5 4 3 1 9 0 12.00 Timing Via VCC 2.2 ms 8,9 Via PDN 0.25 ms 8,9 15.0 ms 9 Max. Time Between Transitions 0.00 -3.00 -6.00 -9.00 -12.00 -15.00 -6 -8 -18.00 -21.00 16 14 Modulation Delay ms 9 500 µs 9 30.0 ns 9 Transmit to Receive Switch Time 180 400 µs 9 Receive to Transmit Switch Time 490 1000 µs 9 µs 9,11 ºC 9 Supply Current (mA) 2.0 Via PDN 10 8 6 4 2 0 290 Environmental 10 8 6 4 2 0 -2 -4 -10 -12 -14 Output Power (dBm) Figure 6: Output Power vs. Current Consumption –40 +85 1.6 7. 8. 9. 10. With a 50% square wave at 1,000bps Time to valid data output Characterized, but not tested Receive Mode on power down (see Using the PDN Line section) 11. Minimum time before mode change 1.4 1.2 VRSSI (V) With a 0Ω resistor on LADJ With a 750Ω resistor on LADJ ISINK = 500µA ISOURCE = 500µA ISINK = 20µA Into a 50Ω load 3.00 12 Via VCC Operating Temperature Range 6.00 Figure 5: Output Power vs. LADJ Resistance Transmtiter Turn-On Time Dwell Time 9.00 Output Power (dBm) Receiver Turn-On Time 1. 2. 3. 4. 5. 6. 6 2 Antenna Port RF Input Impedance 7 1 0.8 0.6 Figure 4: Electrical Specifications 0.4 0.2 0 -115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 RF IN (dBm) Figure 7: RSSI Curve – 4 – – 5 – -60 -55 -50 -45 -40 -35 -30 1. 1.00V/div 18.00 2. 2.00V/div 16.00 Supply Current (mA) 14.00 PDN 12.00 2 10.00 TX Icc RX Icc 8.00 6.00 4.00 DATA 2.00 1 0.00 3.60 3.50 3.40 3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 2.50 2.40 2.30 2.20 2.10 500µS/div Supply Voltage (V) [LADJ = 0] Figure 8: Current Consumption vs. Supply 1. 1.00V/div Figure 11: RX Turn-On Time from PDN 2. 2.00V/div 1. 100mV/div T/R SEL RFIN