249.6 MHz SAW Filter
10 MHz Bandwidth
Part Number SF0250BA03223S
Spectrum Microwave
400 Nickerson Road, Marlborough, MA 01752, USA • Phone 1-508-251-6400 • Fax 1-508-251-6401
www.SpectrumMicrowave.com
DSSF0250BA03223S Rev A 19-Mar-2010
ECN 36650 Page 1 of 3
DESCRIPTION
• 249.6 MHz SAW bandpass filter with 10 MHz bandwidth.
• 9.1 x 4.8 mm ceramic LCC package.
• RoHS compliant.
TYPICAL PERFORMANCE
S11 (199.6-299.6 MHz) S22 (199.6-299.6 MHz)
A
mp
10 dB/div
Amp
1 dB/div
Phase
10 deg/div
Delay
100 ns/div
Center = 249.6 MHz, 10 MHz/div (125 kHz incr)
249.6 MHz SAW Filter
10 MHz Bandwidth
Part Number SF0250BA03223S
Spectrum Microwave
400 Nickerson Road, Marlborough, MA 01752, USA • Phone 1-508-251-6400 • Fax 1-508-251-6401
www.SpectrumMicrowave.com
DSSF0250BA03223S Rev A 19-Mar-2010
ECN 36650 Page 2 of 3
SPECIFICATION
Parameter Min Typ Max Units
Center Frequency, FC 1 - 249.6 - MHz
Insertion Loss - 10.8 13.5 dB
Amplitude variation (244.6 to 254.6 MHz) - 0.7 1 dB p-p
Phase Linearity (244.6 to 254.6 MHz) - 1 4 deg RMS
Absolute Delay - 570 - ns
Lower 1dB Band Edge 2 - 243.89 244.6 MHz
Upper 1dB Band Edge 2 254.6 255.18 - MHz
Relative Attenuation (149.6 to 234.6 MHz) 2 47 53 - dB
Relative Attenuation (234.6 to 235.6 MHz) 2 40 55 - dB
Relative Attenuation (235.6 to 237 MHz) 2 23 55 - dB
Relative Attenuation (237 to 239.6 MHz) 2 13 48 - dB
Relative Attenuation (259.6 to 262 MHz) 2 13 35 - dB
Relative Attenuation (262 to 263.6 MHz) 2 23 47 - dB
Relative Attenuation (263.6 to 264.6 MHz) 2 40 47 - dB
Relative Attenuation (264.6 to 349.6 MHz) 2 43 55 - dB
Source and Load Impedance 50 ohms
Temperature Coefficient of Frequency -18 ppm/˚C
Ambient Temperature - 25 - ˚C
Notes: 1. Reference frequency. Computed as mean of the 3 dB frequencies.
2. All dB values are referenced to the insertion loss value.
MAXIMUM RATINGS
Parameter Min Max Units
Storage Temperature Range -40 85 ˚C
Operating Temperature Range -20 85 ˚C
Input Power Level - 10 dBm
MATCHING CIRCUIT
Ls1 = 39 nH Ls2 = 33 nH
Cp1 = 27 pF Cp2 = 22 pF
Notes:
• Recommend 2% or better tolerance matching components. Typical inductor Q=40.
• Optimum values may change depending on board layout. Values shown are intended as a guide only.
Input
50 Ω
Single ended
Output
50 Ω
Single ended
10 5
All other pads
GND GND
249.6 MHz SAW Filter
10 MHz Bandwidth
Part Number SF0250BA03223S
Spectrum Microwave
400 Nickerson Road, Marlborough, MA 01752, USA • Phone 1-508-251-6400 • Fax 1-508-251-6401
www.SpectrumMicrowave.com
DSSF0250BA03223S Rev A 19-Mar-2010
ECN 36650 Page 3 of 3
PACKAGE OUTLINE
MARKING
All specifications are believed to be accurate and reliable. However, Spectrum Microwave reserves the right to make changes without notice.
© 2010 All ri
g
hts reserved.
ISO 9001
Registered
Package Material:
Body: Al2O3 ceramic
Lid: Kovar, Ni plated
Terminations: Au plating 1 µm min,
over a 1.3-8.9 µm Ni plating
Units: mm
Tolerances are typically ±0.15 mm
except where indicated.
Pad Configuration:
Input: 10
Output: 5
Ground: All other pads
