CX-49G-006.000-A0248 AVX Corporation, CX-49G-006.000-A0248 Datasheet - Page 19

• Manufacturer Part Number: CX-49G-006.000-A0248
• Description: Crystals 6KHZ
• Manufacturer: AVX Corporation
• Series: CX49Gr

Specifications of CX-49G-006.000-A0248

• Tolerance: 50 PPM
• Termination Style: SMD/SMT
• Operating Temperature Range: - 10 C to + 70 C
• Dimensions: 4.8 mm W x 12.3 mm L x 4.5 mm H
• Mounting Style: SMD/SMT
• Frequency: 6 KHz
• Frequency Stability: 50 PPM
• Load Capacitance: 12 pF
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

R
, and in order to oscillate the crystal unit accurately, it must be designed such that the negative resistance of the oscillation
circuit becomes bigger comparing with the resonance resistance value at the time of loading. This ratio is called oscillation
margin degree M
resistance of a value five to ten times or more larger than RL calculated from the resonance resistance specification value.
power loss due to the load resonance resistance of the crystal unit, which continues oscillation.
oscillation circuit C
In a steady oscillation state, the load resonance resistance is given as follows:
The mutual conductance of the oscillation circuit decreases after the oscillation has started to continuously compensate for the
As shown in the following figure, the reactance of the crystal unit varies to a value matching the load capacitance of the
The oscillation start-up conditions are described as
For oscillation circuit designing conditions, it is
M
R
The frequency condition is given as follows:
X
L
L
L
=
>
OSC
=
= X
=
R
C
R
, X
R / R
L
- X
C
L
= 0
OSC
=
>
L
= X
5
and it is one of critical factors when designing the oscillation circuit and is described as below.
C
+ X
– X
. Thus an oscillation frequency is determined.
f
s
f
recommended that an oscillation circuit be designed using a negative
L
f
p
–1/
Le
C
L
Frequency
f
f
f
s
L
p
: Series resonance frequency
: Load resonance frequency
: Parallel resonance frequency
Handling Notes