XE1283SKC915XE1 Semtech, XE1283SKC915XE1 Datasheet - Page 22

• Manufacturer Part Number: XE1283SKC915XE1
• Description: KIT STARTER FOR XE1283 915MHZ
• Manufacturer: Semtech
• Series: TrueRF™r
• Type: Transceiverr

Specifications of XE1283SKC915XE1

• Contents: Processor Boards, Modules, Batteries, Antennas, Serial Cable and Software CD
• For Use With/related Products: XE1283 (915MHz)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

The crystal oscillator has been designed for a crystal with the specifications given below. The oscillator precision can only
be guaranteed for this crystal.
For safe operation, low power consumption and to meet the specified precision, careful board layout is required:
The oscillator characteristics are given below. The characteristics are valid only if the crystal and board layout meet the
specifications above.
Note: Fstab gives the relative frequency deviation from nominal value for a crystal with CL=8.2 pF and within the
temperature range -40°C to 85°C. The crystal tolerance, crystal aging and crystal temperature drift are not included in this
figure.
© Semtech 2005
Symbol
Fs
CL
Rm
Cm
C0
Rmp
Q
Symbol
Rh_xin
Rh_xout
Rh_xin_xout Resistance XIN-XOUT
Cp_xin
Cp_xout
Cp_xin_xout Capacitance XIN-XOUT
Symbol
f
St_xtal
Fstab
Xtal
Keep lines XIN and XOUT short and insert a VSS line in between them.
Connect the crystal package to VSS.
No noisy or digital lines near XIN or XOUT.
Insert guards where needed.
Respect the board specifications below.
Description
Resonance frequency
CL for nominal frequency
Motional resistance
Motional capacitance
Shunt capacitance
Motional
overtone (parasitic)
Quality factor
Description
Nominal frequency
Start-up time
Frequency deviation
Resistance XIN-VSS
Resistance XOUT-VSS
Capacitance XIN-VSS
Capacitance XOUT-VSS
Description
resistance
of
6
th
-100
Min
Min
Min
30k
1.8
0.7
0.5
0.5
0.2
10
10
50
4
-
-
-
22
32768
32768
Typ
Typ
Typ
50k
8.2
2.5
1.1
40
8
1
400k
Max
Max
Max
100
300
3.2
2.0
3.0
3.0
1.0
15
2
-
-
XE1283
Unit
Hz
s
ppm
Unit
Unit
MΩ
MΩ
MΩ
Hz
kΩ
kΩ
www.semtech.com
pF
pF
pF
pF
pF
fF
-