SAW Device
SAW Filter for Radio Communication
n
Features
l
A low-loss filter.
l
Compact.
l
Excellent guaranteed attenuation.
For Industrial Use
Pb
Free
n
Specifications
Model
Item
Nominal frequency : f
0
(MHz)
Insertion loss at Fc
1-dB passband width (MHz)
3-dB passband width (MHz)
Passband width
(rel to Fc)
35-dB passband width (In Band)(MHz)
Ripple (@ Fc ±10MHz)(dB)
Phase linearity (@ Fc ±10MHz)(deg)
Group delay time ripple (@ Fc ±10MHz)(ns)
Absolute delay time @ Fc (is)
Out Band
(rel to Fc)
Operating temperature range (°C)
Terminating impedance (Ω)
Guaranteed attenuation (dB) @ Fc–20MHz
@ Fc+20MHz
min.
–
–
21
23.9
–
–
–
–
–
40
33
23
WF748D0140CD
typ.
140
–
–
–
–
–
–
–
0.76
–
–
–
50 (with matching)
max.
–
11
–
–
34
1.0
14
100
–
–
–
27
n
Dimensions
mm
PAD NO.
5.0
Others
10
5
7.0
Reference land pattern
1.6
2.5
2×1.27
1.27 1.27
1
1.5
10
2
3
4
2.54
1.9
1.5
9–1.0
2.54
5.0
0.8
CONNECTION
GND
INPUT
OUTPUT
n
Characteristics
[In-band characteristics]
CH1 A/R LOG MAG
REF –9.290 dB
1.000 dB/
CH1
CENTER(MHz) 140.0000
SPAN(MHz) 50.000
10–0.6
1.4
9
8
7
6
5
1.27
7.0
[Out-of-band characteristics]
CH1 A/R LOG MAG
REF –9.290 dB
10.000 dB/
n
Matching Circuit
IN
C
1
10
5
C
2
OUT
SAW
50Ω
L
1
L
2
50Ω
CH1
CENTER(MHz) 140.0000
SPAN(MHz) 100.000
sa16_071102_WF748D0140CD_e1
NDK [ NIHON DEMPA KOGYO ]
