RX2A-433-64 RADIOMETRIX, RX2A-433-64 Datasheet - Page 3

• Manufacturer Part Number: RX2A-433-64
• Description: RECEIVER, UHF, FM, RSSI
• Manufacturer: RADIOMETRIX

Specifications of RX2A-433-64

• Current Rating: 12mA
• Data Rate: 64 Kbps
• External Depth: 4.5mm
• External Length / Height: 48mm
• External Width: 18mm
• Frequency: 433MHz
• Operating Temperature Max: 70°C
• Operating Temperature Min: -20°C
• Range: 300
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RX2A receiver
RSSI
Received signal strength indicator with 60dB range. See page 4 for typical characteristics.
0V
DC supply ground. Internally connected to pin 2 and module screen.
Vcc
+2.7V to +16.0V DC supply. Max ripple content 0.1V
AF out (pin 6)
Buffered and filtered analogue output from the FM demodulator. Standing DC bias 1.1V approx. External
load should be >10k // <100pF.
RXD
Digital output from the internal data slicer. The data is a squared version of the signal on pin 6 (AF) and
is true data, i.e. as fed to the transmitter. Output is “open-collector” format with internal 10k pull-up to
Vcc (pin 5).
Radiometrix Ltd, TX2A/RX2A Data Sheet
Pin description:
RF IN
50 input from the antenna, DC isolated
RF GND
RF ground pin, internally connected to
the module screen and pin 4 (0V). This
pin should be connected to the RF return
path (coax braid, main PCB ground plane
etc.)
1
RF in
2
RF gnd
LNA 1
(pin 3)
(pin 4)
(pin 5)
(pin 7)
(pin 1)
(pin 2)
XTAL OSC.
SAW BPF
433MHz
Crystal
26/28MHz
Phase
detector
LNA 2
16
(Fixed frequency PLL Osc.)
Figure 4: RX2A Block diagram
Loop filter
MIXER
VCO
(f
RF
- 10.7MHz)
10.7MHz
IF1
p-p
RX2A
1
regulated
to circuit
+2.8V
. Decoupling is not generally required.
2
7 holes of 0.7 mm dia. pin spacing 2.54mm
Figure 5: Physical dimensions
10.7MHz IF filter
30.48 mm
regulator
dropout
Low
48 mm
Audio LPF
10.7MHz
IF2/Lim
C
Radiometrix
L
C
R
T
T
3
4
buffer
slicer
data
AF
5
6
7
10k
10.7MHz
ceramic
discriminator
1 = RF IN
2 = RF GND
3 = RSSI
4 = 0V
5 = Vcc
6 = AF out
7 = RXD
PCB level
3
RSSI
4
0V
7
RXD
5
V cc
6
AF out
4.5 mm
page 3