240 MHz SAW Filter
1.1 MHz Bandwidth
Part Number: SF0240CD21956S
IDT • SAW Products • 324 Clark Street, Worcester, MA 01606, USA • Ph 1-508-852-5400 • Fax 1-508-852-8456
www.idt.com
DSSF0240CD21956S Rev X1 15-Jan-2008
Page 1 of 3
DESCRIPTION
• 240 MHz SAW bandpass filter with 1.1 MHz bandwidth.
• 19 x 6.5 mm ceramic LCC package.
• RoHS compliant.
TYPICAL PERFORMANCE
Horizontal: Frequency : 1 MHz/div
Vertical from Top: Relative Magnitude : 10 dB/div
Relative magnitude : 1 dB/div
Phase Linearity : 5 deg/div
Group Delay Deviation : 200 ns/div
S11 (235-245 MHz) S22 (235 to 245 MHz)
240 MHz SAW Filter
1.1 MHz Bandwidth
Part Number: SF0240CD21956S
IDT • SAW Products • 324 Clark Street, Worcester, MA 01606, USA • Ph 1-508-852-5400 • Fax 1-508-852-8456
www.idt.com
DSSF0240CD21956S Rev X1 15-Jan-2008
Page 2 of 3
SPECIFICATION
Parameter Min Typ Max Units
Center Frequency, FC 1 - 240 - MHz
Insertion Loss 2 - 13.6 16 dB
1 dB Bandwidth 3 1.1 1.24 - MHz
10 dB Bandwidth 3 - 1.68 1.8 MHz
25 dB Bandwidth 3 - 2.07 2.5 MHz
35 dB Bandwidth 3 - 2.42 3.4 MHz
Passband Amplitude Ripple 4 - 0.8 1.25 dB p-p
Passband Phase Linearity 4 - 3 6 deg p-p
Passband Group Delay Ripple 4 - 130 200 ns p-p
Average Passband Delay 4 - 2.58 2.75 us
Rejection (Fc ± 2.5 to Fc ± 70 MHz) 40 43 - dB
Input and Output Return Loss 4 6 12 - dB
Source and Load Impedance 50 ohms
Ambient Temperature 5 - 25 - ˚C
Notes: 1. Fixed reference. All specified bandwidths are centered on this frequency..
2. Average across passband range Fc ± 0.55 MHz.
3. All bandwidth dB values are taken relative to the insertion loss.
4. Over the passband range Fc ± 0.55 MHz.
5. All electrical specifications apply over the full operating temperature range.
MAXIMUM RATINGS
Parameter Min Max Units
Storage Temperature Range -40 85 ˚C
Operating Temperature Range -10 85 ˚C
Input Power Level - 10 dBm
MATCHING CIRCUIT
Typical component values:
Notes:
1. Recommend use of 2% tolerance matching components. Typical inductor Q=40.
2. Component values may change depending on board layout.
Ls1 = 39 nH Ls2 = 47 nH
Cp1 = 27 pF Cp2 = 27 pF
Rp1 = 560 Ω Rp2 = 1.5 kΩ
10 5
1 6
Input
50 Ω
Single-ended
Output
50 Ω
Single-ended
GND GND
240 MHz SAW Filter
1.1 MHz Bandwidth
Part Number: SF0240CD21956S
IDT • SAW Products • 324 Clark Street, Worcester, MA 01606, USA • Ph 1-508-852-5400 • Fax 1-508-852-8456
www.idt.com
DSSF0240CD21956S Rev X1 15-Jan-2008
Page 3 of 3
PACKAGE OUTLINE SUGGESTED FOOTPRINT
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, MNC reserves the right to make changes without notice.
© 2008 All rights reserved.
Units: mm
Tolerances are typically ±0.15 mm
except where indicated.
Pad Configuration:
Input: 10
Input return: 1
Output: 5
Output return: 6
Ground: All other pads
