AX5243
www.onsemi.com
12
Table 10. TRANSMITTER
Symbol Description Condition Min Typ Max Units
SBR Signal bit rate 0.1 125 kbps
PTX
Transmitter power @ 868 MHz Differential PA, 50 W single
ended measurement at an
SMA connector behind the
matching network, Note 2
−10 16
dBm
Transmitter power @ 433 MHz −10 16
Transmitter power @ 169 MHz −10 16
PTX
868−step
Programming step size output power Note 1 0.5 dB
dTX
temp
Transmitter power variation vs.
temperature
−40°C to +85°C
Note 2
± 0.5 dB
dTX
Vdd
Transmitter power variation vs. VDD_IO 1.8 to 3.6 V
Note 2
± 0.5 dB
Padj Adjacent channel power
GFSK BT = 0.5, 500 Hz deviation,
1.2 kbps, 25 kHz channel spacing,
10 kHz channel BW
868 MHz −44
dBc
433 MHz −51
PTX
868−harm2
Emission @ 2
nd
harmonic
868 MHz, Note 2
−40
dBc
PTX
868−harm3
Emission @ 3
rd
harmonic −60
PTX
433−harm2
Emission @ 2
nd
harmonic
433 MHz, Note 2
−40
dBc
PTX
433−harm3
Emission @ 3
rd
harmonic −40
1. P
out
+
TXPWRCOEFFB
2
12
*1
P
max
2. 50 W single ended measurements at an SMA connector behind the matching network. For recommended matching networks see
section: Application Information.
Table 11. RECEIVER SENSITIVITIES
The table lists typical input sensitivities (without FEC) in dBm at the SMA connector with the complete matching network for BER=10
−3
at
433 or 868 MHz.
Data rate
[kbps]
FSK
h = 0.66
FSK
h = 1
FSK
h = 2
FSK
h = 4
FSK
h = 5
FSK
h = 8
FSK
h = 16
PSK
0.1
Sensitivity [dBm] −135 −134.5 −132.5 −133 −133.5 −133 −132.5 −138
RX Bandwidth [kHz] 0.2 0.2 0.3 0.5 0.6 0.9 2.1 0.2
Deviation [kHz] 0.033 0.05 0.1 0.2 0.25 0.4 0.8
1
Sensitivity [dBm] −126 −125 −123 −123.5 −124 −123.5 −122.5 −130
RX Bandwidth [kHz] 1.5 2 3 6 7 11 21 1
Deviation [kHz] 0.33 0.5 1 2 2.5 4 8
10
Sensitivity [dBm] −117 −116 −113 −114 −113.5 −113 −120
RX Bandwidth [kHz] 15 20 30 50 60 110 10
Deviation [kHz] 3.3 5 10 20 25 40
100
Sensitivity [dBm] −107 −105.5 −109
RX Bandwidth [kHz] 150 200 100
Deviation [kHz] 33 50
125
Sensitivity [dBm] −105 −104 −108
RX Bandwidth [kHz] 187.5 200 125
Deviation [kHz] 42.3 62.5
1. Sensitivities are equivalent for 1010 data streams and PN9 whitened data streams.
2. RX bandwidths < 0.9 kHz cannot be achieved with an 48 MHz TCXO. A 16 MHz TCXO was used for all measurements at 0.1 kbps.
