AUREL RTX-8L3V-FSK Manual de usuario

RTX-8L3V-FSK

RTX-8L3V-A

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User Manual

Le caratteristiche tecniche possono subire variazioni senza preavviso. AUR°EL S.p.A. non si assume la responsabilità di danni causati dall’uso improprio del dispositivo.

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28/04/2020

AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY

Tel.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected] Pag1 di 17

RTX-8L3V-FSK/ASK is an RF digital data transceiver, with high sensitivity and p wer d wn m de

functi nality, w rking n the ISM free-license band f 868.30 MHz, in half-duplex way, FSK m dulated and

fast switch time TX→

→→

→RX and RX→

→→

→TX.

It’s ideal f r l w c st s luti ns, battery supplied systems and thanks t its small size t hand-held terminals;

f r 2-way radi system needing t save space and battery life.

Max speed rate is 4 Kbit/sec Manchester enc ded.

The device can w rk in c mpliance with HCS Micr chip data frame.

All transceiver features can be handled by 4 lines (RX/TX, ENABLE, DATA IN, DATA OUT).

The m dule is available at 3V f p wer supply and it’s c mpliant t Eur pean N rmative EN300 220 and

EN301 489.

Characteristics

Applications

Low current consumption

Low cost

LL synthesis crystal based

Single RF channel

Very small size (25.4x12.4 mm)

Max bit rate : 4800 bps

Max Output ower : 10mW

High sensitivity on reception

Voltage supply: 3V

Wireless hands-free devices

Home automation

Wireless sensors

Meter reading

2-way remote controls

Data logging

Absolute maximum

Operati nal Temperature -20 °C ÷ +85 °C

St cking Temperature -40 °C ÷ +100 °C

V ltage Supply -0,3V ÷ +6V

Input V ltage -0,3V ÷ VCC + 0,3V

Output V ltage -0,3V ÷ VCC + 0,3V

RTX-8L3V-FSK

RTX-8L3V-A

---------------------------------------------------------------------------------------------------------------------------------------------------

User Manual

Le caratteristiche tecniche possono subire variazioni senza preavviso. AUR°EL S.p.A. non si assume la responsabilità di danni causati dall’uso improprio del dispositivo.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

28/04/2020

AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY

Tel.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected] Pag2 di 17

Technical Characteristics

Table 1 – Technical characteristics

Min. Typ. Max. Unit

DC Levels

V ltage supply 2.5 3 3.6 V

Supply current (RX m de)

Enable=1

TX/RX=0

11,2 mA

Supply current(PWRDWN m de)

Enable = 0

TX/RX = 0

Data in = 0

0,5 µA

Supply current (TX m de)

Enable = 1

TX/RX = 1

19,3 mA

Supply current (TX m de, m dulati n 50%) 12 mA

Supply current (Idle m de)

Data in = 0

Enable and TX/RX = 1

4,7 mA

L gic level “1” in input/ utput 0,9 X Vcc V

L gic level “0” in input/ utput 0,1 X Vcc V

ESD antenna pr tecti n (c ntact) ±4 kV

ESD antenna pr tecti n (discharge) ±8 kV

Receiver

Frequency 868.30 MHz

RF Sensitivity (RF/AM/99%/1KHz square wave) -107 dBm

RF Sensitivity (RF/FM/12,5KHz dev./1KHz square wave) -99 dBm

RF Sensitivity (RF/FM/12,5KHz dev./3KHz square wave) -98 dBm

Image frequency 867.4 MHz

Image frequency sensitivity -62 dBm

Bl cking t ±2Mhz (measured fr m Data Out) 79 dB

Bl cking t ±10Mhz (measured fr m Data Out) 95 dB

V ltage Data Out Vdd-0,3 V

BF Output 0,05 1 5 KHz

Transmitter

Transmissi n frequency 868.30 MHz

OOK m dulati n 99 %

FSK m dulati n ±12,5 KHz

RF Output P wer 5 dBm

Spuri us emissi n <1GHz -40 dBm

Spuri us emissi n >1GHz -40 dBm

Minimum supply with utput p wer limited t -3dB 1,9 V

FSK data-rate m dulati n 10 KHz

OOK data-rate m dulati n 10 KHz

Switching times

PWRDWN → RX

Sensitivity -100dBm

Sensitivity -109dBm

PWRDWN → TX 40 ms

TX → RX

Sensitivity -100dBm

Sensitivity -109dBm

RX → TX 0,1 ms

RTX-8L3V-FSK

RTX-8L3V-A

---------------------------------------------------------------------------------------------------------------------------------------------------

User Manual

Le caratteristiche tecniche possono subire variazioni senza preavviso. AUR°EL S.p.A. non si assume la responsabilità di danni causati dall’uso improprio del dispositivo.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

28/04/2020

AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY

Tel.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected] Pag3 di 17

in description and mechanical size

Table 2 – Pin description

n° in

Name Description

1 ANTENNA

Antenna c nnecti n 50 hm. RF utput f r TX, RF input f r RX

2 GND

Gr und

4 DATA IN

Data Input f TX

ASK versi n

1 = emissi n f carrier

0 = n emissi n

FSK versi n

1 = emissi n f carrier 868,3 - 0,012MHz

0 = emissi n f carrier 868,3 + 0,012MHz

5 TX/RX

0 r fl ating = Receiver m de (Receiver ON, Transmitter OFF)

1 = Transmitter m de (Receiver OFF, Transmitter ON)

NOTE: l k at figures bel w f r switching times

Pin c nnected t pull d wn resist r

6 ENABLE

Enable = 0 : PWRDWN

Enable = 1 : Device ON

7 GND

Gr und

8 RSSI OUT

Output anal g f r test purp se.

RSSI anal g value f the received signal p wer. Refer t Figure 14.

9 DATA OUT

Digital data utput f receiver with 0-Vcc v ltage range.

When in transmissi n (pin 5 high) data utput is l gic level l w.

10 +VCC

C nnecti n t the supply p sitive p le:

C nnect 100 nF capacit r t wards gr und plane

in-out

1) ANTENNA

2) GND

4) DATA IN

5) TX/RX

6) ENABLE

7) GND

8) RSSI OUT

9) DATA OUT

10) +VCC

RTX-8L3V-FSK

RTX-8L3V-A

---------------------------------------------------------------------------------------------------------------------------------------------------

User Manual

Le caratteristiche tecniche possono subire variazioni senza preavviso. AUR°EL S.p.A. non si assume la responsabilità di danni causati dall’uso improprio del dispositivo.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

28/04/2020

AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY

Tel.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected] Pag4 di 17

Block diagram

SAW filter PLL l gic

c ntr l

P.A

Switch

antenna

VCO-RX

VCO-TX

Figure 1

Transmitter

It embeds a VCO scillat r c ntr lled by PLL circuit in rder t achieve sh rt switching time TX-RX and wake

up time fr m stand-by m de.

A p wer amplifier b sts the emitted p wer up t 5dBm.

Spuri us emissi ns are limited by SAW filter techn l gy.

Transmitter is switched n driving high RX/TX line and l w the data in line.

The PLL circuit switches n in 200-300 µS, necessary time t set pr perly the RF scillat r.

In rder t transmit, drive high r l w the data in line acc rding t the desired data sequence.

Data can be an enc ded frame r just c ming fr m data ut p rt. The data rate must be l wer than 10

kbit/sec.

Receiver

It’s a single c nversi n superhet-receiver with l cal scillat r, mixer circuit with frequency image rejecti n

and IF frequency at 400 kHz.

RTX-8L3V-FSK

RTX-8L3V-A

---------------------------------------------------------------------------------------------------------------------------------------------------

User Manual

Le caratteristiche tecniche possono subire variazioni senza preavviso. AUR°EL S.p.A. non si assume la responsabilità di danni causati dall’uso improprio del dispositivo.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

28/04/2020

AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY

Tel.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected] Pag5 di 17

Fr nt end circuit and AGC:

A SAW filter is in the middle between antenna and pre-amplifier stage. AGC (aut matic gain c ntr l) circuit

acting n the gain impr ves the dynamic f RF received signal.

AGC turns n whenever the RF received signal is m re p werful than -74dBm and it sets the max gain 7ms

after the RF signal g es d wn the -59 dBm.

This t lerance range prevents endless switches f AGC during recepti n.

Data-Slicer:

This circuit c nverts the anal g signal c ming fr m L.F. t digital ne.

It’s made up f a c mparat r, anal g signal is c nnected t RC netw rk with charge and discharge (time

c nstant equals t 2.25ms).

The circuit all ws recepti n f data pulses with length l wer than 5 ms and higher than 100 us.

It’s n t p ssible t receive UART RS-232 signals. It’s highly suggested t use a balanced c de (Manchester)

as the byte c ntains at least a high r l w level, all wing the peak detect r t perate pr perly.

It’s n t p ssible t receive a DC l w r high level f r a time l nger than 10ms; theref re in case f receiving

pr prietary data frame, it is rec mmended t enc de data taking care f the pulse length limit (10ms).

Squelch immunity t data utput:

The digital utput f receiver (pin 9) is n t immune t white n ise generated by the receiver itself when n

carrier is n air, then pseud -rand m c de, like white n ise, c mes ut f the data utput.

Typically digital utput is c nnected t the input p rt f a micr c ntr ller which must rec gnize valid data

am ng the white n ise.

Figure 2

RTX-8L3V-FSK

RTX-8L3V-A

---------------------------------------------------------------------------------------------------------------------------------------------------

User Manual

Le caratteristiche tecniche possono subire variazioni senza preavviso. AUR°EL S.p.A. non si assume la responsabilità di danni causati dall’uso improprio del dispositivo.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

28/04/2020

AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY

Tel.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected] Pag6 di 17

Operational modes

RTX-8L3V-FSK/ASK can w rk in 4 different m des:

1. ower Down Mode

2. Idle Mode

3. RF Transmission Mode

4. RF Receiving Mode

1. P wer D wn M de (PWRDWN)

By driving l w level pin 6 (ENABLE) the device enters the saving-energy m de, where c nsumpti n is less

than 0,5µA: this m de the transceiver can’t neither receive n r transmit.

2. Idle M de

Initial state where the transceiver is in idle m de when pin 6 (ENABLE) and pin 5 (TX/RX) are high and pin

4(data in) is l w level.

In idle m de the transceiver is n with c nsumpti n f 4,7mA.

PLL circuit f transmitter is active.

3. RF Transmissi n M de

When the pin 5 (TX/RX) and 6 (ENABLE) are b th high, the RF carrier is emitted thr ugh antenna with 5

dBm p wer and the verall c nsumpti n is ar und 19,3mA.

4. RF Receiving M de

Receiving m de is selected by driving l w pin 5 (RX/TX) and high pin 6 (ENABLE).

RTX-8L3V-FSK

RTX-8L3V-A

---------------------------------------------------------------------------------------------------------------------------------------------------

User Manual

Le caratteristiche tecniche possono subire variazioni senza preavviso. AUR°EL S.p.A. non si assume la responsabilità di danni causati dall’uso improprio del dispositivo.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

28/04/2020

AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY

Tel.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected] Pag7 di 17

Switching WRDN→

→→

→RX, WRDN→

→→

→TX, RX→

→→

→TX, TX→

→→

→RX.

In rder t respect latency time f PLL circuit and peak detect rs in data-slicer stage, it is mandat ry t

keep the timing in the f ll wing pictures, in switching fr m TX t RX, fr m RX t TX and fr m p wer d wn

t RX r TX.

Time chart WRDWN→

→→

→ RX

Figure 3

RTX-8L3V-FSK

RTX-8L3V-A

---------------------------------------------------------------------------------------------------------------------------------------------------

User Manual

Le caratteristiche tecniche possono subire variazioni senza preavviso. AUR°EL S.p.A. non si assume la responsabilità di danni causati dall’uso improprio del dispositivo.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

28/04/2020

AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY

Tel.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected] Pag8 di 17

Time chart WRDWN→

→→

→ TX

Figure 4

RTX-8L3V-FSK

RTX-8L3V-A

---------------------------------------------------------------------------------------------------------------------------------------------------

User Manual

Le caratteristiche tecniche possono subire variazioni senza preavviso. AUR°EL S.p.A. non si assume la responsabilità di danni causati dall’uso improprio del dispositivo.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

28/04/2020

AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY

Tel.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected] Pag9 di 17

Time chart RX→

→→

→ TX

Figure 5

RTX-8L3V-FSK

RTX-8L3V-A

---------------------------------------------------------------------------------------------------------------------------------------------------

User Manual

Le caratteristiche tecniche possono subire variazioni senza preavviso. AUR°EL S.p.A. non si assume la responsabilità di danni causati dall’uso improprio del dispositivo.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

28/04/2020