FM Transmitter Module
MKT5-XXX
Features
MINIATURE SIL PACKAGE
FULLY SHIELDED
DATA RATES UP TO 128KBITS/S
5v – 10mW
3v – 10mW versions available
TYPICAL RANGE 350+ m (433.92 MHz Version)
418 / 433.92 MHz VERSIONS
INDUSTRY PIN COMPATABLE
EN 300-220 compliant module
Applications
VEHICLE ALARM SYSTEMS
REMOTE GATE CONTROLS
GARAGE DOOR OPENERS
DOMESTIC AND COMMERCIAL SECURITY
WIRELESS TELEMETRY
REMOTE DATA TRANSFER
Compatible Receiver Modules
MKR5
MKR5B
MKR5LC
MKR2FM
General Description
The MKT5 miniature transmitter UHF radio module
enables the implementation of a simple telemetry link
at data rates of up to 128Kbit/s when used with the
compatible MK receiver modules.
Available for operation at all world frequencies these
modules are able to transmit at distances of up to
250+ m (433.92 MHz version).
The MKT5 module will suit one-to-one and multi-
node wireless links in applications including
building and car security, remote industrial process
monitoring and computer networking. Because of
its small size and low power requirements, this
modules is ideal for use in portable battery powered
wireless applications.
Version 3.0
Advancing radio solutions from 100 to 1000 MHz
We manufacture high quality transmitters, receivers and transceivers
Page 1 of 5
FM Transmitter Module
MKT5-XXX
Absolute Maximum Ratings: Transmitter
Operating temperature:
Storage temperature:
Supply Voltage (pin 3)
Data input (pin 5)
RF Out (pin 2)
-20 C to +55 C
-40 C to +100 C
10V
10V
50V @ < 10MHz , +20dBm @ > 10MHz
Electrical Characteristics: Transmitter 433,92 MHz
pin
5v Transmitter
Supply voltage
Supply current
RF power
3v Transmitter
Supply voltage
Supply current
RF power
RF & Data
nd
2 harmonic
Harmonics @ > 1GHz
Initial frequency accuracy
Modulation bandwidth @ -3dB
Modulation distortion (THD)
Power up time to full RF
Data rate
Data pulse width
Note 1:
2:
3:
3
3
2
3
3
2
min.
4.0
5.5
7
2
4
3
Typ.
5.0
8
max.
6.0
9.5
+10
4
8
7
units
Volts
mA
dBm
Volts
mA
dBm
dBc
dBc
KHz
KHz
%
s
50000
20
bits/s
s
notes
1
1
3
6
1
1
2
2
-50
-50
75
25
10
3
3
measured into a 50 impedance
the limit for the European spec EN 300 220 is –36dBm
128 kbits/sec version also available
Version 3.0
Advancing radio solutions from 100 to 1000 MHz
We manufacture high quality transmitters, receivers and transceivers
Page 2 of 5
FM Transmitter Module
MKT5-XXX
Connection Details
T5
1
2
3
4
5
Figure 1: MK Transmitter
Pin Description:
RF GND
(pin 1)
RF ground pin, internally connected to pin 4 (0V).
This pin should ideally be connected to the nearest
ground plane (e.g. coax braid, main PCB ground
plane etc.)
RF OUT
(pin2)
50 RF antenna output. To achieve best results the
antenna impedance must match that of the module.
V
CC
(pin 3)
+Ve supply pin. The module will generate RF when
V
CC
is present. It is strongly recommended that a
100nF capacitor decouples the supply rail as close as
possible to this pin.
GND
(pin 4)
Supply and data ground connection, connected to pin
1.
Data IN
(pin 5)
This input has an impedance of 47K and should
ideally be driven by a CMOS logic drive or
compatible. The drive circuitry should be supplied
with the same supply voltage as the Tx module.
Version 3.0
Advancing radio solutions from 100 to 1000 MHz
We manufacture high quality transmitters, receivers and transceivers
Page 3 of 5
FM Transmitter Module
MKT5-XXX
Application Information
Antenna Design
The design and positioning of the antenna is as
crucial as the module performance itself in achieving
a good wireless system range. The following will
assist the designer in maximising system
performance.
The antenna should be kept as far away from
sources of electrical interference as physically
possible. If necessary, additional power line
decoupling capacitors should be placed close to the
module.
The antenna ‘hot end’ should be kept clear of any
objects, especially any metal as this can severely
restrict the efficiency of the antenna to receive power.
Any earth planes restricting the radiation path to the
antenna will also have the same effect.
Best range is achieved with either a straight piece of
wire, rod or PCB track @ ¼ wavelength (15.5cm @
433.92MHz). Further range may be achieved if the ¼
wave antenna is placed perpendicular in the middle
of a solid earth plane measuring at least 16cm radius.
In this case, the antenna should be connected to the
module via some 50 ohm characteristic impedance
coax.
Helical Antenna
RF
Application Circuit
The application circuit shows how the MKT5 transmitter
can easily be integrated into a system to form a wireless
link
ANTENNA
+5V
+5V
T5
1
2
3
4
5
1
2
3
4
5
6
7
8
9
A0
A1
A2
A3
A4
A5
A6
A7
VSS
HT12E
VDD
DOUT
OSC1
OSC2
TE\
AD11
AD10
AD9
AD8
18
17
16
15
14
13
12
11
10
R
OSC
Figure 3: MK Transmitter Application Circuit
34mm @ 433MHz
17 turns equally spaced
= 5mm (inside)
Whip Antenna
RF
15.5cm @ 433MHz
Figure 2: Antenna Configurations To Be Used
With The MKT5 Transmitter Modules
Version 3.0
Advancing radio solutions from 100 to 1000 MHz
We manufacture high quality transmitters, receivers and transceivers
Page 4 of 5
FM Transmitter Module
MKT5-XXX
Mechanical Dimensions
31mm
3mm
13mm
T5
pin spacing 2.54mm
1
2
20.32mm
3
4
5
Figure 4: MK Transmitter
Ordering Information
Standard Product;
Part No
Description
MKT5-418*
SIL Transmitter 418.00 MHz
MKT5-434-3HP
3v SIL Transmitter
MKT5-434-5
5v SIL Transmitter 433.92 MHz
* Not recommended for new designs as this frequency allocation will be withdrawn in the UK.
Please consult our sales department for further information.
M.K.Consultants (UK) Ltd
288a-290 Quenns Road
HALIFAX
West Yorkshire
HX1 4NS
England
Tel +44 (0) 1422 329002
Fax +44 (0) 1422 353153
Email:
Web
Disclaimer
MKConsultants have a policy to continually improve the reliability and performance of their products. We therefore reserve the right to
upgrade our products performance without notice.
Although the data contained herewidth is believed to be accurate, however we do not assume any responsibility whatsoever for errors
or omissions this document may contain.
In addition, we do not imply warranty or fitness for any particular application especially life support applications.
admin@mkconsultants.eu
www.mkconsultants.eu
Version 3.0
Advancing radio solutions from 100 to 1000 MHz
We manufacture high quality transmitters, receivers and transceivers
Page 5 of 5
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