AX8052F151
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13
Table 11.
Symbol Description Condition Min Typ Max Units
SBR Signal bit rate
ASK 1 600
kbps
PSK 10 600
FSK 1 350
802.15.4 (DSSS)
ASK and PSK
1 40
802.15.4 (DSSS)
FSK
1 16
IL Maximum input level −20 dBm
CP
1dB
Input referred compression point
2 tones separated by 100 kHz
−35
dBm
IIP3 Input referred IP3 −25
RSSIR RSSI control range 85 dB
RSSIS
1
RSSI step size Before digital channel filter; calculated
from register AX5051_AGCCOUNTER
0.625 dB
RSSIS
2
RSSI step size Behind digital channel filter; calculated
from registers
AX5051_AGCCOUNTER,
AX5051_TRKAMPL
0.1 dB
SEL
868
Adjacent channel suppression
FSK 50 kbps,
(Notes 1 & 2)
18
dB
Alternate channel suppression 19
Adjacent channel suppression
FSK 100 kbps,
(Notes 1 & 3)
16
dB
Alternate channel suppression 30
Adjacent channel suppression
PSK 200 kbps,
(Notes 1 & 4)
17
dB
Alternate channel suppression 28
BLK
868
Blocking at ± 1 MHz offset
FSK 100 kbps,
(Note 5)
38
dB
Blocking at − 2 MHz offset 40
Blocking at ± 10 MHz offset 60
Blocking at ± 100 MHz offset 82
IMRR
868
Image rejection 30
1. Interferer/Channel @ BER = 10
−3
, channel level is +10 dB above the typical sensitivity, the interfering signal is a random data signal (except
PSK200); both channel and interferer are modulated without shaping
2. FSK 50 kbps: 868 MHz, 200 kHz channel spacing, 25 kHz deviation, programming as recommended in Programming Manual
3. FSK 100 kbps: 868 MHz, 400 kHz channel spacing, 50 kHz deviation , programming as recommended in Programming Manual
4. PSK 200 kbps: 868 MHz, 400 kHz channel spacing, programming as recommended in AX5051 Programming Manual, interfering signal is
a constant wave
5. Channel/Blocker @ BER = 10
−3
, channel level is +10 dB above the typical sensitivity, the blocker signal is a constant wave; channel signal
is modulated without shaping, the image frequency lies 2 MHz above the wanted signal
Table 12. LOW FREQUENCY CRYSTAL OSCILLATOR
Symbol Description Condition Min Typ Max Units
f
LPXTAL
Crystal frequency 32 150 kHz
gm
lpxosc
Transconductance oscillator
LPXOSCGM = 00110 3.5 ms
LPXOSCGM = 01000 4.6
LPXOSCGM = 01100 6.9
LPXOSCGM = 10000 9.1
RIN
lpxosc
Input DC impedance 10
MW