RFSOLUTIONS QMR1

QM Receiver Module
QMR1 / QMR2
Features
• Miniature SIL Package
• Unique QM (Quasi AM/FM) Design
• Data Rates Up To 10kbits/s
• Optimal Range 200m (433.92MHz
Versions)
•
•
•
•
•
•
433.92 / 868 MHz Versions
Very High Sensitivity (-112 dBm)
Very Low Current Consumption
Single 5v Supply
Signal Strength Output (RSSI)
High Selectivity (20KHz B/W Possible
on QMR1 )
• Immune To FM Threshold Effect
Applications
• Vehicle Alarm Systems
• Remote Gate Controls
• Garage Door Openers
• Domestic And Commercial Security
Compatible Transmitter Modules
• QFMT1-XXX (see data sheet DS301)
• QAMT2-XXX (see data sheet QAMT2 )
General Description
These miniature UHF receiver radio modules
enable the implementation of a simple telemetry
link at data rates of up to 10Kbit/s when used with
one of the compatible transmitter modules
Available for operation at 433.92 and 868 MHz
these modules are able to receive at distances of
up to 200Mtrs.
Ds302_3
AUG 01
The QMR1 / QMR2 modules 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, the module is ideal for use in
portable battery powered wireless applications
 2001 REG No 277 4001 England
Page 1
QM Receiver Module
QMR1 / QMR2
Absolute Maximum Ratings: Receiver
Operating temperature:
Storage temperature:
-10°C to +55°C
-40°C to +100°C
Supply Voltage
Data input
RF Input
5V
10V
±50V @ < 10MHz , +20dBm @ > 10MHz
Electrical Characteristics: Receiver
pin
DC LEVELS
Supply voltage
Supply current
Supply ripple
Data output high
min.
typ.
Max.
Units
4.5
5
2
4.8
4.0
5.5
V
mA
mA
mVP-P
V
-
Data output low
10
0.5
RF
RF sensitivity
dBm
dBm
KHz
KHz
KHz
KHz
dBm
dBm
<60
<60
<60
dB
dBm
dBm
DYNAMIC TIMING
Power up with signal present
Power up to stable data
10
mS
Signal applied with supply on
Signal to stable data
6
mS
10
50
mS
%
bps
bps
Initial frequency accuracy
Max R.F. input
E.M.C.
Spurious responses upto 1GHz
LO leakage, conducted
LO leakage, radiated
Time between data transitions
Mark:space ratio
Bit rate
Ds302_3
AUG 01
20
200
 2001 REG No 277 4001 England
10000
4000
QMR1
QMR2
V
-110
-112
600
230
±50
+/-30
20
20
IF Bandwidth
Notes
QMR1
QMR2
QMR1
QMR2
QMR1
QMR2
QMR1
QMR2
QMR1
QMR2
Page 2
QM Receiver Module
QMR1 / QMR2
General Information
QMR1 Details
Antenna
Mixer
Band Pass
Filter
RF
AMP
Low Pass
Filter
Detector
IF
AMP
QMR1
Phase
Lock
Loop
1
2
3
4
5
6
7
Figure 2: Receiver Block Diagram
Figure 1: QMR1 Receiver
The receiver module is a quasi AM /FM (QM)
superhet receiver capable of handling data rates
of up to 10Kbits/s. With an on board data buffer
and phase locked loop a –110 dBm sensitivity is
achieved.
Pin Description:
Vcc ( PIN 1 )
+Ve supply pin. Operation from a 5V supply able
to source 2mA at less than 10mVP-P ripple.
GND ( PIN 2 )
Supply ground connection, preferably connected
to a solid ground plane.
RF IN ( PIN 3 )
50Ω RF input from antenna, connect using
shortest possible route. Capacitively isolated from
internal circuit.
Utilising the quasi AM/FM modulation technique
and the latest phase locked loop receiver
technology with one of the compatible transmitter
modules will yield a highly efficient wireless link.
Note: Because of the way Quasi Modulation
operates the QMR1 and the QFMT1 will not work
reliably in close proximity to each other.
RSSI Values
RF Level (dBm) pin 3
RSSI (volts) pin 6
-110
2.12
-100
2.21
-90
2.31
-80
2.46
-70
2.62
-60
2.80
-50
2.91
-40
2.97
-30
3.00
-20
3.03
-10
2.88
UNCONNECTED ( PINS 4 & 5 )
Extra SIL pins for additional mechanical retention.
RSSI ( PIN 6 )
Test output providing a voltage that is proportional
to the level of the RF input on pin 3.
DATA OUT ( PIN 7 )
CMOS compatible output. This may be used to
drive external decoders. Note: sink/source
capability is limited to 20µA.
Ds302_3
AUG 01
 2001 REG No 277 4001 England
Page 3
QM Receiver Module
QMR2 Details
QMR1 / QMR2
General Information
Antenna
QMR2
Mixer
Band Pass
Filter
RF
AMP
1
2
3
4
5
6
Low Pass
Filter
Detector
IF
AMP
Phase
Lock
Loop
7
Figure 3 QMR2 Receiver
Figure 4: Receiver Block Diagram
Pin Description:
RF IN ( pin 1 )
50 ohm RF input from antenna, connect using
shortest possible route. This input is isolated from
the internal circuit using the air gap of the front
end SAW RF filter.
RF GND ( pin 2 )
Supply ground connection. Preferably connected
to a solid ground plane.
RSSI ( pin 3 )
This is a dc output voltage that is proportional to
the RF signal strength applied to pin 1.
The QMR2 receiver module is a FM single
conversion superhet receiver capable of handling
data rates of up to 10Kbits/s. With an on board
data buffer, phase locked loop and a high quality
front end RF stage, a –107dBm sensitivity is
achieved.
Utilising the latest phase locked loop receiver
technology with one of the compatible transmitter
modules will yield a highly efficient wireless link.
RSSI Values
RF Level (dBm) pin 3
RSSI (volts) pin 6
-110
1.16
-100
1.34
-90
1.59
-80
1.78
-70
1.81
-60
1.81
-50
2.17
-40
2.45
-30
2.52
-20
2.52
-10
2.52
GND ( pin 4 )
Connected to power supply ground.
Vcc ( pin 5 )
+Ve supply pin. Operation from a 5V supply able
to source 6mA at less than Vp-p ripple.
AF ( pin 6 )
Audio frequency output. Note Source current is
limited to 40 microA. In most applications a buffer
may be required to interface to this pin.
DATA OUT ( pin 7 )
CMOS compatible output. This may be used to
drive external decoders.
Ds302_3
AUG 01
 2001 REG No 277 4001 England
Page 4
QM Receiver Module
QMR1 / QMR2
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
Receiver Data Output Buffer
The QMR1 receiver has a push-pull data output
drive limited to 20uA. If drive problems are
experienced, and sometimes they exhibit
themselves in a poor system range, the following
simple buffer stage should be incorporated
between the module data output and the
subsequent stage. This buffer is already present
on the QMR2 receiver.
+5V
Data From
Receiver
1K5
Data Out
U1
+5V
U1 = SOT23 Package
part number BU4581 (ROHM)
Figure 6: Receiver Data Output Buffer
Helical Antenna
RF
34mm @ 433MHz
17 turns equally spaced
∅ = 5mm (inside)
Whip Antenna
RF
15.5cm @ 433MHz
Figure 5: Antenna Configurations To Be Used
With The Modules
Ds302_3
AUG 01
 2001 REG No 277 4001 England
Page 5
QM Receiver Module
QMR1 / QMR2
Application Circuit
The application circuit shows how the
QM
receiver can easily be integrated into a system to
form a wireless link.
ANTENNA
+5V
+5V
1
2
3
4
5
6
7
8
9
A0
VDD
A1
VT
A2
OSC1
A3
OSC2
A4
DIN
A5
D11
A6
D10
A7
D9
VSS
D8
18
1K5Ω
Ω
17
16
QMR1
1
ROSC
2
3
4
5
6
7
15
14
13
12
11
10
DATA OUT 4
DATA OUT 3
DATA OUT 2
DATA OUT 1
HT12D
ANTENNA
+5V
+5V
1
2
3
4
5
6
7
8
9
A0
VDD
A1
VT
A2
OSC1
A3
OSC2
A4
DIN
A5
D11
A6
D10
A7
D9
VSS
D8
18
1K5Ω
Ω
17
16
ROSC
QMR2
1
2
3
4
5
6
7
15
14
13
12
11
10
DATA OUT 4
DATA OUT 3
DATA OUT 2
DATA OUT 1
HT12D
Figure 7: QM Receiver Application Circuits
Ds302_3
AUG 01
 2001 REG No 277 4001 England
Page 6
QM Receiver Module
QMR1 / QMR2
Mechanical Dimensions
37mm
5mm
21mm
QMR1
pin spacing 2.54mm
1
2
3
4
5
6
7
20.32mm
Figure 8: QMR1 Receiver
4.65mm
48mm
16mm
QMR2
pin spacing 2.54mm
1
2
3
4
5
6
7
30.48mm
Figure 9: QMR2 Receiver
Ds302_3
AUG 01
 2001 REG No 277 4001 England
Page 7
QM Receiver Module
QMR1 / QMR2
Ordering Information
PART No
QMR1-434
QMR1-868
QMR2-434
Description
SIL Receiver 434 MHz
SIL Receiver 868 MHz
SIL Receiver 434 MHz
Should you require further assistance please contact :
R F Solutions Ltd.,
Unit 21, Cliffe Industrial Estate,
South Street, Lewes,
E. Sussex. BN8 6JL, England
Tel: +44 (0)1273 898 000
Fax: +44 (0)1273 480 661
Email : [email protected]
http://www.rfsolutions.co.uk
Information contained in this document is believed to be accurate , however no representation or warranty is given and no liability is assumed by R.F. Solutions Ltd. With
respect to the accuracy of such information. Use of R.F.Solutions as critical components in life support systems is not authorised except with express written approval from R.F.Solutions Ltd.
Ds302_3
AUG 01
 2001 REG No 277 4001 England
Page 8