|
Table 3 performance parameter
of 5MHz series special crystal filter
|
parameter
model
|
Center
Frequency
|
Insertion
Loss
|
Ripple
in
Passband
|
Bandwidth
at -3dB
|
Shape
Factor
|
Stopand
Attenuation
|
Matching
Impedance
|
|
|
f0(KHz)
|
B0(dB)
|
Db(dB)
|
Df-3dB(KHz)
|
K(40db/3dB)
|
BZ(dB)
|
R(Ω)
|
|
LDT5MA
|
fr±0.003
|
≤4
|
≤1
|
55±5
|
≤3
|
≥55
|
680
|
|
LDT5MB
|
fr±0.004
|
≤4
|
≤1
|
70±5
|
≤3
|
≥50
|
1000
|
|
LDT5MC
|
fr±0.005
|
≤3
|
≤1
|
90±10
|
≤3
|
≥45
|
1200
|
|
LDT5MD
|
fr±0.006
|
≤3
|
≤1
|
120±10
|
≤3
|
≥40
|
1500
|
Figure 2 external dimensions of 5 MHz series special crystal filter
Table 4 performance parameter of 21.4MHz series special crystal filter
|
parameter
model
|
Center
Frequency
|
Insertion
Loss
|
Ripple
in
Passband
|
Bandwidth
at -3dB
|
Shape
Factor
|
Stopand
Attenuation
|
Matching
Impedance
|
|
|
f0(KHz)
|
B0(dB)
|
Db(dB)
|
Df-3dB(KHz)
|
K(40db/3dB)
|
BZ(dB)
|
R(Ω)
|
|
LDT21.4MA
|
fr±0.003
|
≤5
|
≤1
|
50±5
|
≤3
|
≥40
|
300
|
|
LDT21.4MB
|
fr±0.004
|
≤5
|
≤1
|
70±5
|
≤3
|
≥40
|
300
|
|
LDT21.4MC
|
fr±0.005
|
≤5
|
≤1
|
100±10
|
≤3
|
≥40
|
500
|
|
LDT21.4MD
|
fr±0.006
|
≤5
|
≤1
|
140±10
|
≤3
|
≥40
|
500
|
| 
