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AX8052F151-2-TB05

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P34
AX8052F151
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10
AC Characteristics
Table 7. CRYSTAL OSCILLATOR (RF REFERENCE OSCILLATOR)
Symbol Description Condition Min Typ Max Units
f
XTAL
Crystal frequency Notes 1, 3 15.5 16 25 MHz
gm
osc
Transconductance oscillator
AX5051_XTALOSCGM = 0000 1
mS
AX5051_XTALOSCGM = 0001 2
AX5051_XTALOSCGM = 0010
default
3
AX5051_XTALOSCGM = 0011 4
AX5051_XTALOSCGM = 0100 5
AX5051_XTALOSCGM = 0101 6
AX5051_XTALOSCGM = 0110 6.5
AX5051_XTALOSCGM = 0111 7
AX5051_XTALOSCGM = 1000 7.5
AX5051_XTALOSCGM = 1001 8
AX5051_XTALOSCGM = 1010 8.5
AX5051_XTALOSCGM = 1011 9
AX5051_XTALOSCGM = 1100 9.5
AX5051_XTALOSCGM = 1101 10
AX5051_XTALOSCGM = 1110 10.5
AX5051_XTALOSCGM = 1111 11
C
osc
Programmable tuning capacitors at pins
CLK16N and CLK16P
AX5051_XTALCAP = 000000
default
2
pF
AX5051_XTALCAP = 111111 33
C
osc−lsb
Programmable tuning capacitors,
increment per LSB of AX5051_XTALCAP
0.5 pF
f
ext
External clock input (TCXO) Notes 2, 3 15.5 15 25 MHz
RIN
osc
Input DC impedance 10
kW
1. Tolerances and start−up times depend on the crystal used. Depending on the RF frequency and channel spacing the IC must be calibrated
to the exact crystal frequency using the readings of the register AX5051_TRKFREQ.
2. If an external clock is used, it should be input via an AC coupling at pin CLK16P with the oscillator powered up and
AX5051_XTALCAP = 000000
3. Lower frequencies than 15.5 MHz or higher frequencies than 25 MHz can be used. However, not all typical RF frequencies can then be
generated.
AX8052F151
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Table 8. RF FREQUENCY GENERATION SUBSYSTEM (SYNTHESIZER)
Symbol Description Condition Min Typ Max Units
f
REF
Reference frequency Note 1 16
24
MHz
f
range_hi
Frequency range
BANDSEL = 0 800 940
MHz
f
range_low
BANDSEL = 1 400 470
f
RESO
Frequency resolution 1 Hz
BW
1
Synthesizer loop bandwidth
VCO current: VCOI = 001
Loop filter configuration: FLT = 01
Charge pump current: PLLCPI = 010
100
kHz
BW
2
Loop filter configuration: FLT = 01
Charge pump current: PLLCPI = 001
50
BW
3
Loop filter configuration: FLT = 11
Charge pump current: PLLCPI = 010
200
BW
4
Loop filter configuration: FLT = 10
Charge pump current: PLLCPI = 010
500
T
set1
Synthesizer settling time for
1 MHz step as typically
required for RX/TX switching
VCO current: VCO_I = 001
Loop filter configuration: FLT = 01
Charge pump current: PLLCPI = 010
15 ms
T
set2
Loop filter configuration: FLT = 01
Charge pump current: PLLCPI = 001
30
T
set3
Loop filter configuration: FLT = 11
Charge pump current: PLLCPI = 010
7
T
set4
Loop filter configuration: FLT = 10
Charge pump current: PLLCPI = 010
3
T
start1
Synthesizer start−up time if
crystal oscillator and
reference are running
VCO current: VCO_I = 001
Loop filter configuration: FLT = 01
Charge pump current: PLLCPI = 010
25 ms
T
start2
Loop filter configuration: FLT = 01
Charge pump current: PLLCPI = 001
50
T
start3
Loop filter configuration: FLT = 11
Charge pump current: PLLCPI = 010
12
T
start4
Loop filter configuration: FLT = 10
Charge pump current: PLLCPI = 010
5
PN868
1
Synthesizer phase noise
Loop filter configuration:
FLT = 01
Charge pump current:
PLLCPI = 010
VCO current: VCO_I = 001
868 MHz, 50 kHz from carrier −85
dBc/Hz
868 MHz, 100 kHz from carrier −90
868 MHz, 300 kHz from carrier −100
868 MHz, 2 MHz from carrier −110
PN433
1
433 MHz, 50 kHz from carrier −90
433 MHz, 100 kHz from carrier −95
433 MHz, 300 kHz from carrier −105
433 MHz, 2 MHz from carrier −115
PN868
2
Synthesizer phase noise
Loop filter configuration:
FLT = 01
Charge pump current:
PLLCPI = 001
VCO current: VCO_I = 001
868 MHz, 50 kHz from carrier −80
dBc/Hz
868 MHz, 100 kHz from carrier −90
868 MHz, 300 kHz from carrier −105
868 MHz, 2 MHz from carrier −115
PN433
2
433 MHz, 50 kHz from carrier −90
433 MHz, 100 kHz from carrier −95
433 MHz, 300 kHz from carrier −110
433 MHz, 2 MHz from carrier −122
1. ASK, PSK and 1−200 kbps FSK with 16 MHz crystal, 200−350 kbps FSK with 24 MHz crystal.
AX8052F151
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Table 9. TRANSMITTER
Symbol Description Condition Min Typ Max Units
SBR Signal bit rate
ASK 1 600
kbps
PSK 10 600
FSK, (Note 2) 1 350
802.15.4 (DSSS)
ASK and PSK
1 40
802.15.4 (DSSS)
FSK
1 16
PTX
868
Transmitter power @ 868 MHz TXRNG = 1111
LOCURST = 1
15 dBm
PTX
433
Transmitter power @ 433 MHz TXRNG = 1111
LOCURST = 1
16 dBm
PTX
868−harm2
Emission @ 2
nd
harmonic
(Note 1)
−50
dBc
PTX
868−harm3
Emission @ 3
rd
harmonic −55
1. Additional low−pass filtering was applied to the antenna interface, see applications section.
2. 1 − 200 kbps with a 16 MHz crystal, 200 − 350 kbps with 24 MHz crystal
Table 10. RECEIVER
Datarate [kbps]
Input Sensitivity in dBm TYP. at SMA Connector for BER = 10
−3
(433 or 868 MHz)
ASK FSK h = 1 FSK h = 4 FSK h = 8 FSK h = 16 PSK
1.2 −115 −116
2 −115 −115
10 −103 −109 −110
100 −97 −103 −98 −104
200 −94 −100 −100
600 −90 −98
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P34

AX8052F151-2-TB05

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Manufacturer:
ON Semiconductor
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RF System on a Chip - SoC RF-MICROCONTROLLER
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