FM Radio Transmitter & Receiver Modules
T5 / R5
Features
•
•
•
•
•
•
Miniature SIL package
Fully shielded
Data rates up to 128kbits/sec
Range up to 300 metres
Single supply voltage
Industry pin compatible
T5-434
•
Temp range
•
•
•
-20°C to +55°C
No adjustable components
High shock resistance
Temperature compensated RF output
R5-434
•
High sensitivity
•
Analogue / Digital Outputs
•
Signal strength output (RSSI)
•
On board AGC
•
Single conversion FM Super-Het
•
Double RF filtering (inc saw front end)
Applications
•
Vehicle alarm systems
•
Remote gate controls
•
Garage door openers
•
Domestic and commercial security
General Description
The T5 and R5 data link modules are miniature
UHF radio modules, which enable the
implementation of a simple telemetry link upto 300
metres, and at data rates of up to 128Kbit/s
The T5 and R5 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.
The ‘B’ derivative parts offer a cost reduced
version.
The receiver is based on the classical superhet
single conversion architecture utilising a PLL xtal
referenced oscillator which yields a highly stable
IF frequency (10.7 MHz). This hence allows use of
high Q bandpass filters offering excellent adjacent
channel rejection and hence high interference
Immunity.
Because of its small size and low power
requirements, these modules are ideal for use in
portable battery powered wireless applications.
DS305-8
Nov ‘05
©2005
REG No 277 4001, England.
Page 1
FM Radio Transmitter & Receiver Modules
Connection Diagram
T5 / R5
T5
R5
1
2
3
4
5
1 2
3 4 5 6 7
Figure 1: Transmitter
Figure 2: Receiver
Pin Descriptions:
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)
50Ω RF antenna output. To achieve best results
the antenna impedance must match that of the
module.
V
CC
(pin 3)
+Ve supply pin (3.0 to 9.0 volts). 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 47KΩ 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.
Ordering Information:
RF IN (pin 1)
50Ω 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)
RF ground connection, preferable connected to a
solid plane.
RSSI (pin 3)
The Received Signal Strength Indicator provides a
DC output voltage proportional to the RF input
signal. The amplitude of the RSSI voltage
increases with increasing RF signal strength.
GND (pin 4)
Connect to power supply ground.
V
CC
(pin 5)
+Ve supply pin. Operation from a 5V supply able
to source6mA at less than V
p-p
ripple.
AF (pin 6)
Audio frequency output.
DATA OUT (pin 7)
CMOS compatible output. This may be used to
drive external decoders. To reduce any noise on
this output ass a Add a 56pF cap from this pin to
GND.
Part No
R5-434-5-20
R5-434-5-20B
R5-434-5-50
R5-434-5-50B
R5-434-5-128
Description
Rx 433.92MHz 20Kbps
Rx 433.92MHz 20Kbps ‘B part’
Rx 433.92MHz 5V 50Kbps
Rx 433.92MHz 5V 50Kbps ‘B part’
Rx 433.92MHz 5V 128Kbps
Part No
T5-434-9-20
T5-434-5V
T5-434-5-20B
T5-434-3V
T5-434-3-20B
Description
Tx 433.92MHz 9v 20Kbps
Tx 433.92MHz 5v 128Kbps
Tx 433.92MHz 5v 20Kbps ‘B part’
Tx 433.92MHz 3v 50Kbps
Tx 433.92MHz 3v 20Kbps ‘B part’
DS305-8
Nov ‘05
©2005
REG No 277 4001, England.
Page 2
FM Radio Transmitter & Receiver Modules
T5 / R5
Absolute Maximum Ratings: Transmitter T5
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 T5
Please note that the ‘B’ devices are supplied without can shield.
pin
DC LEVELS
Supply voltage 3V Versions
Supply voltage 5V Versions
Current & RF POWER
Standard T5 Devices
Supply current @ V
CC
= 5V
RF power
T5’B’ Devices
Supply current @ V
CC
= 3V
Supply current @ V
CC
= 5V
RF power @ V
CC
= 3V
RF power @ V
CC
= 5V
RF & Data
2
nd
harmonic
Harmonics @ > 1GHz
Initial frequency accuracy
Overall frequency accuracy
Modulation bandwidth @ -3dB
Modulation distortion (THD)
Power up time to full RF
Standard T5 Devices
Data rate Standard
Data pulse width
T5’B’ Devices
Data rate Standard
Data pulse width
3
3
Min.
2
4.5
typ.
3.0
5.0
Max.
4
5.5
units
Volts
Volts
notes
3
2
3
3
2
2
4
5.5
3
7
9
6
8
12
+12
8
9.5
+7
+10
mA
dBm
mA
mA
dBm
dBm
dBc
dBc
KHz
KHz
KHz
%
ms
1
1
1
1
1
1
1
1
-50
-46
±50
±75
10
1
128,000
40
bits/s
µs
bits/s
µs
20,000
500
Notes
1.
Measured into a 50Ω impedance
2.
The limit for European spec EN300-220 is –36dBm
DS305-8
Nov ‘05
©2005
REG No 277 4001, England.
Page 3
FM Radio Transmitter & Receiver Modules
Absolute Maximum Ratings: Receiver R5
Operating temperature:
Storage temperature:
Supply Voltage (pin 5)
RF Input (pin 1)
-10°C to +55°C
-40°C to +100°C
7V
+20dBm
T5 / R5
Electrical Characteristics: Standard Receiver R5
min.
DC LEVELS
Supply voltage
Supply current
Supply ripple
Data output high
Data output low
RF
RF sensitivity
IF Bandwidth
Initial signal accuracy
Max. RF input
E.M.C
Spurious responses upto 1GHz
LO leakage, conducted
LO leakage, radiated
Image Rejection
Dynamic Timings
Power up to stable data
(With RF signal present)
30
5
5
35
7
7
2.5
1
1
1
50
20
7
6000
700
300
mS
mS
mS
mS
mS
mS
mS
uS
US
uS
20Kbps Part
50Kbps Part
128Kbps Part
20Kbps Part
50Kbps Part
128Kbps Part
All Versions
20Kbps Part
50Kbps Part
128Kbps Part
4.5
-
typ.
5.0
6
-
=>4.0
<=0.5
-105
230
±25
20
<60
<60
<60
50
Max.
5.5
10
units
Volts
mA
mV
p-p
V
V
dBm
KHz
KHz
dBm
dB
dBm
dBm
dBm
notes
1
Signal to stable data
(With power supply already on)
Power up to valid RSSI
(With RF signal present)
Data Pulse Widths
(SeeNote 2)
0.5
1. IF bandwidth available down to 27KHz
2. The data slicer is optimised for a 50:50 duty cycle, hence for reliable communications data should be
encoded using a suitable scheme such as Manchester Encoding, though pulse width modulation up to
30:70/70:30 can also be utilised.
DS305-8
Nov ‘05
©2005
REG No 277 4001, England.
Page 4
FM Radio Transmitter & Receiver Modules
T5 / R5
Electrical Characteristics: Receiver R5 ‘B’ Parts
Please note that the ‘B’ devices are supplied without can shield.
min.
typ.
DC LEVELS
Supply voltage
4.5
5.0
Supply current
6
Supply ripple
-
-
Data output high
=>4.0
Data output low
<=0.5
RF
RF sensitivity
IF Bandwidth
Initial signal accuracy
Max. RF input
E.M.C
Spurious responses upto 1GHz
LO leakage, conducted
LO leakage, radiated
Image Rejection
Dynamic Timings
Power up to stable data
(With RF signal present)
Signal to stable data
(With power supply already on)
Power up to valid RSSI
(With RF signal present)
Data Pulse Widths
(SeeNote 2)
50
20
-103
230
±22
20
<60
<60
<60
60
30
5
35
7
2.5
1
1
6000
700
Max.
5.5
10
units
Volts
mA
mV
p-p
V
V
dBm
KHz
KHz
dBm
dB
dBm
dBm
dBm
mS
mS
mS
mS
mS
uS
uS
20Kbps Part
64Kbps Part
20Kbps Part
64Kbps Part
All Versions
20Kbps Part
50Kbps Part
notes
1
3. IF bandwidth available down to 27KHz
4. The data slicer is optimised for a 50:50 duty cycle, hence for reliable communications data should be
encoded using a suitable scheme such as Manchester Encoding, though pulse width modulation up to
30:70/70:30 can also be utilised.
DS305-8
Nov ‘05
©2005
REG No 277 4001, England.
Page 5
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