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PDF RXM-315-LC Data sheet ( Hoja de datos )
| Número de pieza | RXM-315-LC | |
| Descripción | RECEIVER MODULE DATA GUIDE | |
| Fabricantes | Linx Technologies | |
| Logotipo |  |
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RXM-315-LC
RXM-418-LC
RXM-433-LC
LC SERIES RECEIVER MODULE DATA GUIDE
DESCRIPTION:
The LC Series is ideally suited for volume use in
OEM applications such as remote control,
security, identification, and periodic data transfer.
Packaged in a compact SMD package, the LC
receiver utilizes a highly optimized SAW
architecture to achieve an unmatched blend of
performance, size, efficiency and cost. When
paired with a matching LC series transmitter, a
highly reliable wireless link is formed, capable of
transferring serial data at distances in excess of
300 Feet.No external RF components, except an
antenna, are required, making design integration
straightforward, even for engineers lacking
previous RF experience.
FEATURES:
PHYSICAL DIMENSIONS
PINOUTS (BOTTOM VIEW)
s Low Cost
s No External RF Components Required
s Low Power Consumption
s Compact Surface-mount Package
s Stable SAW-based Architecture
s Outstanding Sensitivity
APPLICATIONS INCLUDE:
s Remote control
s Keyless entry
s Garage / Gate openers
s Lighting control
s Medical monitoring / Call systems
s Remote industrial monitoring
s Periodic data transfer
s Home / Industrial automation
s Fire / Security alarms
s Remote status / Position sensing
s Long-range RFID
s Wire elimination
s Supports Data Rates to 5,000 bps
s Wide Supply Range (2.7-5.2 VDC)
s Qualified Data Output
s Direct Serial Interface
s No Production Tuning
ORDERING INFORMATION
PART #
DESCRIPTION
EVAL-***-LC
MDEV-***-LC
TXM-315-LC
TXM-418-LC
TXM-433-LC
RXM-315-LC
RXM-418-LC
RXM-433-LC
Basic Evaluation Kit
Master Development Kit
Transmitter 315 MHZ
Transmitter 418 MHZ
Transmitter 433 MHZ
Receiver 315 MHZ
Receiver 418 MHZ
Receiver 433 MHZ
*NOTE*: For reflow compatible versions,
add -R to the end of the part number.
*** Insert Frequency
LC Receivers are supplied in tube
packaging - 40 pcs. per tube.
Revised 6/6/00
1 page  
TYPICAL PERFORMANCE GRAPHS
figure 3: Sensitivity vs. VSWR
figure 4: 418/433MHz
Consumption vs. Supply Voltage
Data Out
Data Out
Carrier
Carrier
figure 5: RF in vs. Receiver response time figure 6: Typical Receiver Turn-Off Time
Original
Received
Original
Received
figure 7: Original vs. Received Data
4,800 BPS 20% Duty Cycle
figure 8: Original vs. Received Data
4,800 BPS 80% Duty Cycle
PDN Pin
Data Out
figure 9: Power-On Settling Time
(Time to Valid Data)
Page 5
5 Page 
4. Observe appropriate layout practice between the module and its antenna.
A simple trace may suffice for runs of less than .25" but longer distances
should be covered using 50Ω coax or a 50Ω microstrip transmission line.
This is because the trace leading to the module can effectively contribute
to the length of the antenna thus lowering its resonant bandwidth. In order
to minimize loss and detuning, a microstrip transmission line is commonly
utilized.The term microstrip refers to a PCB trace running over a ground-
plane, the width of which has been calculated to serve as a 50Ω
transmission line between the module and antenna. This effectively
removes the trace as a source of detuning.The correct trace width can be
easily calculated using the information below.
figure 17: Microstrip formulas (Er = Dielectric constant of pc board material)
Dielectric
Constant
4.8
4
2.55
Width/Height
(W/d)
1.8
2
3
Effective
Dielectric
Constant
3.59
3.07
2.12
Characteristic
Impedance
50.0
51.0
48.0
5. In some applications, it is advantageous to place receiver and its antenna
away from the main equipment.This avoids any interference problems and
allows flexible orientation of the receiver antenna to achieve optimum RF
performance.
RECEIVER ANTENNA CONSIDERATIONS
The choice of antennas is one of the most critical and often overlooked design
considerations. The range, performance, and legality of an RF link is critically
dependent upon the type of antenna employed.Proper design and matching of
an antenna is a complex task requiring sophisticated test equipment and a
strong background in principles of RF propagation. While adequate antenna
performance can often be obtained by trial and error methods, you may also
want to consider utilizing a professionally designed antenna such as those
offered by Linx. Our low-cost antenna line is designed to ensure maximum
performance and compliance with Part 15 attachment requirements.
Page 11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet RXM-315-LC.PDF ] | |
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