High Integrity FM Transceiver
WP-MKX2010
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27-01-04
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Features
Operation on 434.075, 868.40 and 914.5 MHz
X2011 version includes integrated pcb loop
antenna (434 & 868 MHz versions)
Double RF filtering = High Reliability RF Link
Data rates to 20 kbps (Wide-band 64 kbps
version available to order)
-112 dBm receiver sensitivity (434 version)
CD and RSSI outputs
Crystal stabilised accurate RF
Hence narrower BW filter utilised
Results in over 300m range
EN 300 220-1, 300 683 & FCC compliant
Immune to Tetra and High power Radio Amateur
Repeater Stations
Applications
EPOS TERMINALS
REMOTE TELEMETRY & TELECOMMAND
REMOTE METER READING
DOMESTIC AND COMERCIAL SECURITY
General Description
The WP-MK-X2010 radio transceiver module was
designed to provide reliable wireless operation at
moderate data rates for use throughout the world. Its
unique features of narrower RF channel bandwidths
and hence high interference rejection capability at
SAW module prices make the X2010 the ideal choice
for next generation applications.
Available for operation at the major frequency
allocations world-wide in the same package, these
modules have been designed to provide a reliable
wire free link for the next century, accounting for the
increased traffic from other legal users of the radio
spectrum.
The transmitter section uses a PLL design that
utilises a highly stable and accurate reference
crystal oscillator. This results in a RF transmission
tightly controlled in its frequency spread and over
its operating temperature range. This is exploited in
the receiver design.
The receiver section uses a single conversion
super-het design, again using PLL technology.
Hence narrower bandwidth RF filters are utilised
which result in superior rejection of interference as
well as providing good receiver sensitivity and
hence range.
High Integrity FM Transceiver
WP-MKX2010
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Absolute Maximum Ratings: Receiver
Operating temperature:
-20
C to +55
C
Storage temperature:
-40
C to +100
C
Supply Voltage
6V
Data Input:
Vcc + 0,3v
RF Input
0 dBm
Electrical Characteristics:
Performance data measured at 20
C and +5 volt supply and RF = 434,075 MHz
pin
min.
typ.
max.
units
notes
DC LEVELS
Supply voltage
17
4,5
5
5,5
V
Supply current (receiver enabled)
17
7
mA
Supply current (transmitter enabled)
17
8
mA
Leakege current with Vcc connected
1
uA
Data input/output high
12,14
0,7xVcc
Vcc
V
Data input/output low
12,14
0
0,0xVcc
V
RF
Receiver sensitivity (12 dB SINAD on AF
output)
13
-112
dBm
Image rejection
50
dB
RF power out (transmitter)
1
mW
FM Deviation
+/-10
KHz
Initial frequency accuracy
100
Hz
Overall frequency accuracy
+/-2
KHz
Max RF input to receiver
0
dBm
E.M.C.
Spurious responses upto 1GHz
<-36
dB
LO leakage, conducted
<60
dBm
LO leakage, radiated
<60
dBm
DYNAMIC TIMING
RX enable to valid RSSI / CD
mS
RX enable to stable receiver data out
5
mS
TX enable to full RF out
5
mS
Minimum data pulse width
50
uS
Data Bit rate
50
20000
bps
2
Notes
1)
Over full operating temperature range
2)
1 Hz = 2 bps
High Integrity FM Transceiver
WP-MKX2010
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Mechanical description
5.0
0.8
2.0
8.5
1.3
30.4
33.0
22.0
Pin 1
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
Notes
Recommended PCB hole diameter to accommodate the connecting pins = 1.2mm
All dimensions are in mm
Distance between each connecting pin = 2.54mm
Pins 4,5,6 and 7 are internally floating not connected to anything
High Integrity FM Transceiver
WP-MKX2010
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Mechanical description
18
17
16
15
14
13
12
11
10
1
7
8
9
Loop Antenna
3
23
48
33
Notes
All dimensions are in mm
Recommended PCB hole diameter to accommodate the connecting pins = 1.2mm
Distance between each connecting pin = 2.54mm
High Integrity FM Transceiver
WP-MKX2010
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Pin Functional description WP-MK-X2010 & WP-MK-X2011
Pin No.
Description
Details
1 & 3
RF Ground
For best results, these pins should be connected to the ground plane
against which the antenna radiates
2
Antenna
Nominal 50 ohm input/output impedance capacitively isolated from
internal circuit. See application notes for antenna examples
9, 10, 18
Ground
Supply ground points
4, 5, 6 & 7
NC
Not connected internally
7 (WP-MK-X2011)
Gnd
RF gnd only on X2011
8
RSSI
Receiver signal strength indicator
DC voltage proportional to RF signal strength being received
11
CD
Digital Carrier Detect Output Active Low
12
RxD
Receiver digital data output (CMOS logic out) representing true data as
supplied to the transmitter
13
AF
Audio Frequency Output
14
TxD
Data input to the transmitter can be directly interfaced to CMOS logic
drive operating on the same supply voltage as the transceiver
15
Tx Enable
Active Low
Applying Vcc disables the transmitter
16
Rx Enable
Active Low
Applying Vcc places the receiver in sleep mode
17
Vcc
Supply voltage range from 4.5 to 5.5volts. Note that module is not
reverse polarity protected
State Table
Tx (Pin 15)
Rx (Pin 16)
Mode
1
1
Power down mode. Supply current < 1uA
1
0
Receiver only enabled. Data, AF, CD and RSSI outputs valid
0
1
Transmitter only enabled. Tx data input valid
0
0
Tx and Rx on. Avoid this mode as it will eventually destroy the module
High Integrity FM Transceiver
WP-MKX2010
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RSSI Values
The RSSI output provides a dc voltage that is
proportional to the RF signal strength picked up on the
antenna (pin 2) port of the module.
The table below gives typical values of RSSI for varying
degrees of RF signal strength applied.
RF Input (dBm)
RSSI (V)
-105
0,82
-100
0,88
-90
1,12
-80
1,43
-70
1,75
-60
2,06
-50
2,36
-40
2,57
-30
2,6
-20
2,6
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 @ wavelength (15.5cm @
433.92MHz). Further range may be achieved if the
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.
RF
RF
Helical Antenna
Whip Antenna
34mm @ 433MHz
17 turns equally spaced
= 5mm (inside)
15.5cm @ 433MHz
Figure 2: Antenna Configurations To Be Used
With The WP-MK-X2010
High Integrity FM Transceiver
WP-MKX2010
Page 7 of 7
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Ordering Information
Standard Product;
Part No
Description
WP-MK-X2010-434,075
434,075 MHz Transceiver
WP-MK-X2010-868,40
868,40 MHz Transceiver
WP-MK-X2010-914,5
914,5 MHz Transceiver
Please consult our sales department for further information.
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