AX5043-QFN28-TU AXSEM, AX5043-QFN28-TU Datasheet - Page 15

• Manufacturer Part Number: AX5043-QFN28-TU
• Description: RF Transceiver Narrow-Band-IC
• Manufacturer: AXSEM

Specifications of AX5043-QFN28-TU

• Number Of Receivers: 1
• Number Of Transmitters: 1
• Wireless Frequency: 70 MHz to 1050 MHz
• Interface Type: SPI
• Output Power: 18 dBm to 22 dBm
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Maximum Supply Current: 60 mA
• Minimum Operating Temperature: - 40 C
• Modulation: ASK, FSK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.3.
Crystal Oscillator
SYMBOL
f
gm
C
C
f
V
RIN
NDIV
Notes
Low-power Oscillator
SYMBOL
f
f
Version 0.2
XTAL
ext
osc-slow
osc-fast
osc
osc-lsb
ext
osc
osc
1.
2.
3.
SYSCLK
AC Characteristics
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 TRKFREQ
The oscillator transconductance is regulated for fastest start-up time during start-up and for lowest power during steady state oscillation.
This means that values will depend on the crystal used.
If an external clock is used, it should be input via an AC coupling at pin CLK16P with the oscillator powered up and XTALCAP=0x00
DESCRIPTION
Crystal frequency
Oscillator transconductance
control range
Programmable tuning capacitors
at pins CLK16N and CLK16P
Programmable tuning capacitors,
increment per LSB of XTALCAP
External clock input
External clock amplitude
Input DC impedance
Divider ratio f
NDIV
DESCRIPTION
Oscillator frequency slow mode
Oscillator frequency fast mode
SYSCLK
SYSCLK
= f
XTAL
/
Preliminary
CONDITION
Note 1
Self-regulated see
note 2
XTALCAP = 0x00
default
XTALCAP = 0x01
XTALCAP = 0xFF
XTALCAP = 0x01 –
0xFF
Note 3
CONDITION
LPOSC FAST=0
LPOSC FAST=1
Internal calibration
vs. crystal clock
has been
performed
MIN.
MIN.
608
0.2
9.8
10
2
0
TYP.
TYP.
10.2
640
8.5
0.5
16
40
16
2
3
4
Datasheet AX5043
MAX.
MAX.
10.8
Specifications
672
0.9
2
20
10
UNIT
UNIT
MHz
MHz
kHz
mS
k"
pF
pF
pF
pF
Hz
V
15