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FM-RX1-433A 반도체 회로 부품 판매점

(FM-RX1-xxxx) Receiver Module FM



RF Solutions 로고
RF Solutions
FM-RX1-433A 데이터시트, 핀배열, 회로
www.DataSheet4U.com
FM R. F. RECEIVER MODULES. FMRX1- XXXX
FEATURES
SELECTIVE DOUBLE CONVERSION SUPERHET.
LOW POWER
13mA CONTINUOUS,
130uA POWER SAVE MODE.
FAST ENABLE TIME;
‘A’ VERSION <3mS.
‘F’ VERSION <1mS.
WIDE SUPPLY VOLTAGE, 4.5 - 9 VOLTS.
ANALOGUE & DIGITAL OUTPUT.
HIGH DATA RATES (up to 5Kbps).
CARRIER DETECT OUTPUT.
AVAILABLE AS EITHER 418 OR 433MHz.
APPLICATIONS
REMOTE SWITCHING SYSTEMS
REMOTE DATA COMMS
PAGERS
ALARM SYSTEMS
GARAGE DOOR OPENERS
REMOTE TELEMETRY
GENERAL DESCRIPTION
The R.F. Solutions FMRX1 - XXX range of Radiometrix Receivers are compact board SIL Modules which can be
used to capture R.F. data from an FM transmitter such as the RFS FMTX-1 (see RF Solutions FM Transmitter
Module data sheet FMTX1-XxXX). When used as a remote control system, up to 200 metres range can be
achieved.
The Receiver may also be supplied as a bare board or as a custom solution unique to customer specific
requirements. Please contact R.F. Solutions for further information.
BLOCK DIAGRAM
SAW
1st LO
433.92MHz
2nd
LO
16MHz
R.F.
IN 1
418MHz PRE
BPF
AMP
GND
2
DS000021 Rev 2.1 Jul ‘99
1st
MIXER
2nd MIX
IF AMP
DEMOD
3rd
ORDER
5khz LPF
BUFFER
ACTIVE
DATA
SLICER
©1999 REG No 277 4001, ENGLAND.
Vcc
5
DETECT
3
AF
6
+
_ DATA
7
0V
4
Page 1


FM-RX1-433A 데이터시트, 핀배열, 회로
www.DataSheet4U.com
FM R. F. RECEIVER MODULES. FMRX1- XXXX
PIN DESCRIPTION
Pin No
1
Name
R.F. IN
2 R.F. GND
3 DETECT
4 0 VOLT
5 Vcc
6 AF
7 DATA
Description
Connects to the Receiver antenna. Has nominal 50impedance and is capacitively
isolated from internal circuit.
Should be connected to any ground plane against which the antenna works.
(Internally connected to pin 4).
May be used to derive a carrier detect to enable external circuit when a signal is
being received. If the detect function is unused connect a 10kresistor to Vcc (pin
5).
Ground for Supply.
Supply Voltage. Note; Must be a clean supply (<2mV pk-pk ac), stable and free of
high frequency digital noise. A supply filter is recommended unless the module is
driven from its own regulated supply.
FM Demodulator output. It has a standing DC bias of approx. 2 volts and may be
used to drive analogue data detectors such as modem IC’s or DTMF decoders. Can
drive load impedances down to 2kand up to 100pF.
Digital output from the internal data slicer (true data as fed to the Transmitter’s Data
input). Output is a squared version of the AF signal (pin 6). This signal is used to
drive external digital decoders. Can drive load impedances down to 1kand up to
1nF.
FUNCTIONAL DESCRIPTION
This receiver module is a double conversion FM Superhet with a data slicer driven by the AF output. Additionally,
a fast acting carrier detect signal is a available to indicate to external circuits that a signal is present. This signal
is extremely useful when implementing duty cycle power save circuits or to indicate to external logic that a signal
is being received. It is internally derived from the degree of noise quieting due to the presence of a received
carrier.
The receiver is designed to work with the matching transmitter (FMTX). With the addition of simple antenna the
pair may be used to transfer serial data up to 200 metres. The range of the system depends upon several factors,
principally the type of antenna employed and the operating environment. The 200m quoted range is a reliable
operating distance over open ground using 1/4 whip antenna at both ends of the link at 1.5 metres above ground.
Smaller antenna, interference or obstacles (e.g. buildings) will reduce the reliable working range (down to 30
metres in extreme cases). Increased antenna height, slow data or a larger receive antenna will increase the
range.
Warning - Don’t be tempted to adjust the trimmer on the module, it controls the receive frequency and can only
be correctly set-up with an accurate RF signal generator.
MODULE MOUNTING CONSIDERATIONS
1. The module may be mounted vertically or bent horizontal to the motherboard.
2. No conductive items should be placed within 4mm of the module’s component side, to prevent detuning.
3. Observe RF layout practice between the module and it’s antenna, i.e <10mm unscreened track, use 50
microstrip or coax for >10mm.
4. It is good practice to earth plane all unused area around the module.
5. Mount as far as possible from high frequency interference sources. Microprocessors with external busses
are especially incompatible with sensitive radio receivers and should be kept at least 1 metre from the
receive antenna. Single chip microcontrollers are much less of a problem.
6. In some applications it is advantageous to locate the receiver and it’s antenna away from the main
equipment. This avoids interference problems and allows for flexibility in the sitting of the receive antenna
for optimum RF performance.
DS000021 Rev 2.1 Jul ‘99
©1999 REG No 277 4001, ENGLAND.
Page 2




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