AM-TX1-XXX Datasheet, PDF (1/3 Pages) rfsolutions.ltd – AM RF TRANSMITTER MODULE

AM RF TRANSMITTER MODULE.
FEATURES
• MINIATURE MODULE (7.5 x 11.5 X 4.5mm)
• SAW CONTROLLED FREQUENCY STABILITY
• NO ADJUSTABLE COMPONENTS.
• TRANSMITTING RANGE UP TO 30 METRES.
• CMOS/TTL COMPATIBLE INPUT.
• CURRENT CONSUMPTION 2.5mA (typ).
• SINGLE SUPPLY VOLTAGE 2.5 -12V.
• COMPATIBLE WITH R.F. SOLUTIONS AM RECEIVER.
• MPT1340 LICENCE EXEMPT.
• AVAILABLE AS EITHER 418MHz OR 433MHz.
AM-TX1-XXX
APPLICATIONS
• CAR ALARM KEYFOBS
• REMOTE TRANSMITTER ENCODERS
• GARAGE DOOR OPENERS
• REMOTE GATE SYSTEMS
DESCRIPTION
The R.F. Solutions AM Transmitter module offers a miniature hybrid modular RF transmitter providing on-off
keyed modulation, which can be used to transmit data from any standard CMOS/TTL source up to 1200
baud.
The module is very simple to operate, requiring only two connections (see application circuit below). The
module is also very efficient, using only 2.3mA (typ) which means that it may be driven directly from an
encoder I/C or microcontroller. The output impedance has been designed to give optimum performance when
coupled with a small antenna such as a tuned loop or short whip.
The modules are compatible with the AM Receiver modules (AM -HRRn-XXX or AM-RRS2-XXX).
The transmitter module is type approved to MPT1340 for use in general telemetry and telecommunications
products, when used with the antenna as listed overleaf.
APPLICATION CIRCUIT
Driving TX1 from Current Source
Signal
from
Encoder
circuit
drive
current
drive
Voltage
Rd
220pF
+
TX1
Module
-
RF GND
Driving TX1 from - Current Sink
drive
Voltage
Signal
from
Encoder
circuit
RF GND
220pF TX1
Module
Rd
drive
current
DS012_1
Oct 00
©2000 REG No 277 4001, ENGLAND.
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