RX2G Просмотр технического описания (PDF) - Radiometrix Ltd

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RX2G

UHF FM Data Transmitter and Receiver Modules

Radiometrix Ltd 

Functional description

The TX2A transmitter module is a crystal based PLL controlled FM transmitter operating between 2.2V and 16V

and is available in 433.92MHz. The TX2A module is type approved to EN 300 220-3 for European use and

delivers nominally +10dBm at 11mA. The module measures 32 x 12 x 3.8 mm.

The RX2G module is a single conversion FM superhet receiver capable of handling data rates of up to 64kbps.

RX2G needs a regulated 5V supply and draws 10mA when receiving. The RX2G features a fast power-up time

for effective duty cycle power saving and a signal strength (RSSI) output with 50dB of range. Full screening and

a SAW front-end filter give good immunity to interference. The SIL style RX2G measures 48 x 17.5 x 4.5 mm

excluding the pins.

TX2A transmitter

supply

regulator

5

2.2 -- 16V

2

RF out

433.92 MHz

band pass

filter

buffer

3

RF gnd

1

Fig. 2: TX2A block diagram

VCO

32

Loop

Filter



ref

osc

4

En

35kHz

LPF

7

TXD

6

0V

Pin description:

32 mm

3.8 mm

RF GND

(pins 1&3)

RF ground, internally connected to the module

screen and pin 6 (0V). These pins should be

directly connected to the RF return path - e.g.

coax braid, main PCB ground plane etc.

RF OUT

(pin 2)

50 RF output to the antenna. Internally DC-

isolated. See antenna section of apps notes for

details of suitable antennas.

En

(pin 4)

Tx enable. <0.15V shuts down module (current

<1A). >1.7V enables the transmitter.

Impedance ~1M. Observe slew rate

requirements (see apps notes).

12.0

mm

TX2A

12.5

mm

Radiometrix

PCB level

15.24 mm

12 3

45 6 7

1 = RF GND

2 = RF OUT

3 = RF GND

4 = En

5 = Vcc

6 = 0V

7 = TXD

7 holes, 0.7 mm dia, pin spacing 2.54 mm

Fig 3: TX2A physical dimensions

Vcc

(pin 5)

+2.2V to +16V DC supply. Max ripple content 0.1VP-P. Decoupling is not generally required.

0V

(pin 6)

DC supply ground. Internally connected to pins 1 & 3 and module screen.

TXD

(pin 7)

DC-coupled modulation input. Accepts serial digital data at 0V to 2.5V levels.

See applications notes for suggested drive methods. Input is high impedance (>100k).

Notes: 1. The 3V and 5V supply variant TX2As intended for direct replacement to our SAW based TX2

modules and do not have internal regulator. They also have identical pin out as of TX2, hence lack pin

3 (GND) and pin 4 (Enable).

2. The TXD input of 3V and 5V versions require serial digital data at 0-Vcc levels. i.e. 0-3V and 0-5V

respectively

Radiometrix Ltd, TX2A/RX2G Data Sheet

page 2

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