Data Sheet
Operating Temperature Range:
(2)
-10 to +50
o
C
Part Number 855975
280 MHz SAW Filter
Electrical Specifications
(1)
Parameter
(3)
Center Frequency, f
0
Insertion Loss at 280 MHz
Lower 3 dB Point
(4)
Upper 3 dB Point
Passband Ripple
271.5 - 288.5 MHz
Group Delay Variation
271.5 - 288.5 MHz
Stopband Rejection
(4)
10 - 250 MHz
310 - 340 MHz
340 - 500 MHz
Source Impedance:
(5)
Load Impedance:
(5)
Notes:
1.
2.
3.
4.
5.
Minimum
-
-
-
288.5
-
-
40
38
40
-
-
Typical
280
8.95
269.1
291.1
0.6
40
43
40
42
50
50
Maximum
-
10
271.5
-
1
100
-
-
-
-
-
Unit
MHz
dB
MHz
MHz
dB p-p
ns
dB
dB
dB
Ω
Ω
All specifications are based on the test circuit shown below
In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over
temperature
Electrical margin has been built into the design to account for the variations due to temperature drift and manufacturing tolerances
Relative to insertion loss at 280 MHz
This is the optimum impedance in order to achieve the performance shown
Test Circuit:
12nH
3
7
18pF
1,2,4,5,6,8
50Ω
15nH
50Ω
Single-ended
50Ω
10pF
Subject to change or obsolescence without notice
Rev A
07-Dec-2001
Page 2 of 5
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