SAW Device
SAW Filter for GSM Base Station
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Features
l
A low-loss filter.
l
With a low-band ripple.
l
Excellent group delay characteristics.
l
Excellent guaranteed attenuation.
For Industrial Use
Pb
Free
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Specifications
Model
Item
Nominal frequency : f
0
(MHz)
Minimal insertion loss (dB)
1-dB passband width (MHz)
In-band deviation (dB p-p)(f
0
±0.2MHz)
Absolute group delay time (ns)(at f
0
)
Group delay deviation (ns p-p)(f
0
±0.2MHz)
Out-of-band attenuation (from the minimal insertion loss)
f
0
±0.4MHz to f
0
±0.6MHz
f
0
±0.6MHz to f
0
±1.2MHz
f
0
±1.2MHz to f
0
±1.8MHz
f
0
±1.8MHz to f
0
±3.4MHz
Guaranteed attenuation (dB)
*1
*1
Terminating impedance (Ω)
f
0
±3.4MHz to f
0
±6.5MHz
f
0
±6.5MHz to f
0
±9.5MHz
f
0
±9.5MHz to f
0
±17MHz
f
0
–115MHz to f
0
–17MHz
f
0
+17MHz to f
0
+325MHz
Operating temperature range (°C)
min.
–
–
0.4
–
700
–
–
0
8
20
25
34
40
43
55
55
–10
WF972A0125CG
typ.
125
5.6
0.7
0.5
1075
85.0
–
2
11
31
44
47
41
51
65
56
–
50 with matching
max.
–
7
–
1.0
1700
120
–
–
–
–
–
–
–
–
–
–
85
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Dimensions
mm
Reference land pattern
13.3
10
9
8
7
6
6.5
6
1.905×4=7.62
0.80
7 8 9
10
2.5
7.5
1.905×4=7.62
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Characteristics
CH1 A/R LOG MAG
[In-band
REF –5.670 dB
0.500 dB/
CH2 A/R DELAY
REF 1.044 μsec
0.050 μsec/
characteristics]
1
2
3
4
5
5
4
3
2
1
1.5
10–1.0
1.65 max
PAD NO.
Others
10
5
CONNECTION
GND
INPUT
OUTPUT
CH1 A/R LOG MAG
[Out-of-band
REF –5.670dB 10.000 dB/
CH1 CENTER(MHz) 125.0000
CH2 CENTER(MHz) 125.0000
SPAN(MHz)1.000
SPAN(MHz)1.000
characteristics]
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Matching Circuit
Ls2
10
SAW
50Ω
Lp1
Others
Lp4
50Ω
5
Ls3
CH1 CENTER(MHz) 125.0000
SPAN(MHz) 12.000
sa18_071102_WF972A0125CG_e1
NDK [ NIHON DEMPA KOGYO ]
