Pin Description
pin
pin
pin
1
2
3
RF IN
The receiver antenna connects to this input. It has nominal RF
impedance of 50Ω and is capacitively isolated from the internal circuit
RF GROUND
DETECT
This pin should be connected to any ground plane against which the
antenna works. It is internally connected to pin 4.
This pin may be used to derive a carrier detect to enable external circuits
when a signal is being received. If the detect function is not being used a
10 kΩ pull-up to pin 5 (Vcc) should be connected. Refer to applications
note for further details on the use of this pin.
pin
pin
4
5
0 volt
Vcc
Ground for supply.
Positive supply of 4V to 9V 13 mA. The supply must be clean (<2mV pp)
stable and free of high frequency digital noise. A supply filter is
recommended unless the module is driven from it’s own regulated supply.
pin
6
7
AF
This is the FM demodulator output. It has an standing DC bias of
approximately 1.4V and may be used to drive analogue data detectors
such as modem chips or DTMF decoders. Load impedances as low as 2 kΩ
and up to 100 pF can be driven
pin
.
DATA
This digital output from the internal data slicer is a squared version of
the signal on pin 6 (AF) This signal is used to drive external digital
decoders, it is true data (i.e. as fed to the transmitters data input). Load
impedances as low as 1 kΩ and up to 1 nF can be driven
figure 3: Mechanical Dimensions:
Radiometrix Ltd, SILRX-UHF Data Sheet
page 3
RADIOMETRIX [ RADIOMETRIX LTD ]
