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257.5 MHz SAW Filter
35 MHz Bandwidth
Part Number: SF0258BA02488S
DESCRIPTION
•
•
•
257.5 MHz SAW bandpass filter with 35 MHz bandwidth.
13.3 x 6.5 mm ceramic LCC package.
RoHS compliant.
TYPICAL PERFORMANCE
50. ns/"
Horizontal:
Vertical (from top):
S11 (177.5-337.5 MHz)
Frequency
Magnitude
Magnitude
Phase Deviation
Group Delay Deviation
16
10
1
5
50
MHz /div
dB/div
dB/div
deg/div
ns/div
S22 (177.5-337.5 MHz)
Spectrum Microwave
400 Nickerson Road, Marlborough, MA 01752, USA • Phone 1-508-251-6400 • Fax 1-508-251-6401
www.SpectrumMicrowave.com
DSSF0258BA02488S Rev A 19-Mar-2010
ECN 36650 Page 1 of 3
257.5 MHz SAW Filter
35 MHz Bandwidth
Part Number: SF0258BA02488S
SPECIFICATION
Parameter
Center Frequency, FC
Minimum Insertion Loss 1
Lower 1.5 dB band Edge 3
Upper 1.5 dB band Edge 3
Lower 45 dB band Edge 3
Upper 45 dB band Edge 3
Relative Attenuation (Fc/2 to 235.5 MHz) 3
Relative Attenuation (279.5 to 1.5*Fc MHz) 3
Absolute Delay
Amplitude Ripple 2
Amplitude Ripple (any 1.25 MHz BW)
Source/Load Impedance (differential)
Temperature Coefficient of Frequency
Ambient Temperature
Notes:
Min
275.0
235.4
45
45
-
-
Typ
257.5
21.4
238.8
276.2
236.3
278.8
54
54
0.99
0.9
0.42
50
-82
40
Max
23
240.0
279.6
1.00
1.5
0.5
-
Units
MHz
dB
MHz
MHz
MHz
MHz
dB
dB
us
dB p-p
dB p-p
ohms
ppm/˚C
˚C
1. Measured with 50Ω analyzer.
2. Measured within the 1 dB bandwidth over temperature.
3. Measured relative to the Insertion Loss Value.
MAXIMUM RATINGS
Parameter
Storage Temperature Range
Operating Temperature Range
Input Power Level
Min
-40
-10
-
Max
85
80
+10
Units
˚C
˚C
dBm
MATCHING CIRCUIT
11
5
Input
50 Ω
Balanced
Output
50 Ω
Balanced
12
6
Note: Matching components are not required.
Spectrum Microwave
400 Nickerson Road, Marlborough, MA 01752, USA • Phone 1-508-251-6400 • Fax 1-508-251-6401
www.SpectrumMicrowave.com
DSSF0258BA02488S Rev A 19-Mar-2010
ECN 36650 Page 2 of 3
257.5 MHz SAW Filter
35 MHz Bandwidth
Part Number: SF0258BA02488S
PACKAGE OUTLINE
SUGGESTED FOOTPRINT
Units: mm
Tolerances are ±0.15 mm except
where indicated.
Pad Configuration:
Input:
11
Input Return: 12
Output:
5
Output Return: 6
Ground:
1,2,3,4,7,8,9,10
Package Material:
Body: Al2O3 ceramic
Lid: Kovar, Ni plated
Terminations: Au plating 1 µm
min, over a 1.3-8.9 µm Ni plating
ISO 9001
Registered
All specifications are believed to be accurate and reliable. However, Spectrum Microwave reserves the right to make changes without notice.
© 2010 All rights reserved.
Spectrum Microwave
400 Nickerson Road, Marlborough, MA 01752, USA • Phone 1-508-251-6400 • Fax 1-508-251-6401
www.SpectrumMicrowave.com
DSSF0258BA02488S Rev A 19-Mar-2010
ECN 36650 Page 3 of 3