Datasheet T5, R5 Datasheet (RF SOLUTIONS)

Features

• MINIATURE SIL PACKAGE

• FULLY SHIELDED

• DATA RATES UP TO 128KBITS/S

• RANGE UPTO 300 METRES

• SINGLE SUPPLY VOLTAGE

• INDUSTRY PIN COMPATIBLE

QFMT5-434

• TEMP RANGE -20°C to +55°C

• NO ADJUSTABLE COMPONENTS

• GOOD SHOCK RESISTANCE

• TEMPERATURE COMPENSATED RF

OUTPUT

Applications

• VEHICLE ALARM SYSTEMS

• REMOTE GATE CONTROLS

• GARAGE DOOR OPENERS

• DOMESTIC AND COMMERCIAL SECURITY

General Description

QFMR5-434

• HIGH SENSITIVTY

• ANALLOUGE, DIGITAL OUTPUTS

• SIGNAL STRENGTH OUTPUT (RSSI)

• ON BOARD AGC

• SINGLE CONVERSION FM SUPER-HET

• DOUBLE RF FILTERING (INC. SAW FRONT

END)

The QFMT5 and QFMR5 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 QFMT5 and QFMR5 modules will suit one-to­one and multi-node wireless links in applications
including building and car security, remote
industrial process monitoring and computer
networking.

DS305_2 April 01 2001 REG No 277 4001, England. Page 1

Because of its small size and low power
requirements, these modules are ideal for use in
portable battery powered wireless applications.

FM Radio Transmitter & Receiver Modules T5 / R5

Connection Diagram

T5

Quasar
R 5

1 2 3 4 5

Figure 1: 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)

50Ω RF antenna output. To achieve best results
the antenna impedance must match that of the
module.

VCC (pin 3)

+Ve supply pin (3.0 to 9.0 volts). The module will
generate RF when VCC 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:

1 2 3 4 5 6 7

Figure 2: Receiver

RF IN (pin 1)

50 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

(pin 5)

CC

+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.

Part No Description

QFMT5-434-5V Transmitter 433.92MHz 5v
QFMT5-434-3V Transmitter 433.92MHz 3v

QFMT5-434-128 Transmitter 433.92MHz 5v

128Kbps Data rate

Part No Description

QFMR5-434-15 Receiver 433.92MHz

15Kbps Data rate

QFMR5-434-50 Receiver 433.92MHz

50Kbps Data rate

QFMR5-434-128 Receiver 433.92MHz

128Kbps Data rate

DS305_2 April 01 2001 REG No 277 4001, England. Page 2

FM Radio Transmitter & Receiver Modules T5 / R5

Absolute Maximum Ratings: Transmitter QFMT5

Operating temperature: -20°C to +55°C
Storage temperature: -40°C to +100°C

Supply Voltage (pin 3) 10V
Data input (pin 5) 10V
RF Out (pin 2) ±50V @ < 10MHz , +20dBm @ > 10MHz

Electrical Characteristics: Transmitter T5

pin Min. typ. Max. units notes

DC LEVELS

Supply voltage 3 4.5 5.0 5.5 Volts

Current & RF POWER

433.92 MHz
Supply current @ VCC = 5V 3 12 mA 1
RF power 2 9 +12 dBm 1

RF & Data

2nd harmonic -50 dBc 1
Harmonics @ > 1GHz -46 dBc 1
Initial frequency accuracy
Overall frequency accuracy

Modulation bandwidth @ -3dB 10 KHz
Modulation distortion (THD) %
Power up time to full RF 10

Data rate 50000 bits/s
Data pulse width 40

Note 1: measured into a 50Ω impedance

±50
±75

KHz
KHz

µs

µs

DS305_2 April 01 2001 REG No 277 4001, England. Page 3

FM Radio Transmitter & Receiver Modules T5 / R5

Absolute Maximum Ratings: Receiver QFMR5

Operating temperature: -10°C to +55°C
Storage temperature: -40°C to +100°C

Supply Voltage (pin 5) 7V
RF Input (pin 1) +20dBm

Electrical Characteristics: Receiver R5

Pin min. typ. Max. units notes

DC LEVELS

Supply voltage 5 4.5 5.0 5.5 Volts
Supply current 4.8 mA
Supply ripple - - 10 mV
Data output high 4.0 V
Data output low 0.5 V

p-p

RF

RF sensitivity -107 dBm
IF Bandwidth 230 KHz
Initial signal accuracy
Max. RF input 20 dBm

E.M.C

Spurious responses upto 1GHz <60 dB
LO leakage, conducted <60 dBm
LO leakage, radiated <60 dBm

Dynamic Timings

Power up to stable data (With RF signal
present)

Signal to stable data (With power suplly
already on)

Power up to valid RSSI (With RF signal
present)

Mark : space ratio 50 %
Bit rate 100 50000 bps

±22

tba mS

tba mS

tba mS

KHz

DS305_2 April 01 2001 REG No 277 4001, England. Page 4

FM Radio Transmitter & Receiver Modules T5 / R5

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

34mm @ 433MHz

Application Circuit

The application circuits show how the QFMT5
transmitter and the QFMR5 receiver can easily be
integrated into a system to form a wireless link.

ANTENNA

+5V

1

A0

2

A1

3

A2

4

A3

5

A4

6

A5

7

A6

8

A7

9 10

VSS AD8

HT12E

DOUT
OSC1
OSC2

AD11
AD10

18

VDD

17

R

OSC

16
15
14

TE\

13
12
11

AD9

Figure 4: QFMT5 Transmitter Application

Circuit

ANTENNA

+5V

1
2
3
4
5
6
7
8
9 10

A0

VDD
A1
A2

OSC1

A3

OSC2
A4
A5
A6
A7
VSS D8

HT12D

DIN
D11
D10

18

1K5

R

OSC

DATA OUT 4
DATA OUT 3
DATA OUT 2
DATA OUT 1

ΩΩ

17

VT

16
15
14
13
12
11

D9

T5

Quasar
R 5

1 2 3 4 5 6 7

+5V

4 51 2 3

+5V

Figure 5: QFMR5 Receiver Application Circuit

17 turns equally spaced

∅

= 5mm (inside)

RSSI Values:

The QFMR5 RSSI output provides a DC output
proportional to the RF input signal. The table

Whip Antenna

below shows the typical RSSI value depending on
the Rf signal strength.

RF

15.5cm @ 433MHz

Figure 3: Antenna Configurations To Be Used

With The QFMT5 & QFMR5 Modules

DS305_2 April 01 2001 REG No 277 4001, England. Page 5

RF Signal Strength / dBm RSSI / V

-110 tba

-100

-90

-80

-70

-60

-50

-40

-30

-20

FM Radio Transmitter & Receiver Modules T5 / R5

Mechanical Dimensions

3.0 mm

31.5 mm

CE

10.5 mm

T5

17.5mm

1.5mm

1 2

20.32 mm

3 4 5

Figure 6: Transmitter

49.05mm 4.65mm

Quasar
R 5

pin spacing 2.54mm

1 2 3 4 5 6 7

Pin spacings 2.54 mm
Pin Dia 0.5mm
pin 1 is 2.33mm from edge of module
All dimensions +/- 0.5mm

31mm

3.5mm

Pin spacings 2.54 mm
Pin Dia 0.5mm
All dimensions +/- 0.5mm

Figure 7: Receiver

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: [phone] Fax: [phone]

Email : [e-mail] 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.

DS305_2 April 01 2001 REG No 277 4001, England. Page 6