SAW multimedia filters
Series/Type:
X6948D
The following products presented in this data sheet are being withdrawn.
Ordering Code
B39570X6948N201
Substitute Product
Date of Withdrawal
2011-01-14
Deadline Last
Orders
2011-09-30
Last Shipments
2012-09-30
For further information please contact your nearest EPCOS sales office, which will also support you in selecting a
suitable substitute. The addresses of our worldwide sales network are presented at www.epcos.com/sales.
SAW Components
SAW bandpass filter
Data Sheet
Characteristics
Reference temperature:
Terminating source impedance:
Terminating load impedance:
T
A
= 25 (45) °C
Z
S
= 50
Ω
Z
L
= 2 kΩ||3pF and matching network
min.
Insertion attenuation
α
Reference level for
57.02 (57.00) MHz
the following data
Amplitude ripple
(p-p)
∆α
54.52 ... 59.02 (54.50 ... 59.00) MHz
Relative attenuation
52.77 (52.75)
54.12 (54.10)
59.52 (59.50)
60.27 (60.25)
62.40 (62.38)
64.77 (64.75)
MHz
MHz
MHz
MHz
MHz
MHz
α
rel
typ.
@ 25 ˚C
19.2
max.
X 6948 D
57.00 MHz
17.7
20.7
dB
—
0.5
—
dB
36.0
0.7
1.5
32.0
37.0
38.0
37.0
34.0
34.0
42.0
2.2
3.0
40.0
47.0
45.0
42.0
39.0
39.0
—
3.7
4.5
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
dB
dB
Lower sidelobe
45.02 ... 50.02 (45.00 ... 50.00) MHz
50.02 ... 52.77 (50.00 ... 52.75) MHz
Upper sidelobe
62.40 ... 70.02 (62.38 ... 70.00) MHz
Reflected wave signal suppression
1.5
µs
... 6.0
µs
after main pulse
(test pulse 250 ns,
carrier frequency 57.02 MHz)
Group delay ripple (p-p)
∆τ
54.52 ... 59.02 (54.50 ... 59.00) MHz
Impedance
at 57.02 MHz
Input:
Z
IN
= R
IN
||
C
IN
Output:
Z
OUT
= R
OUT
||
C
OUT
Temperature coefficient of frequency
TC
f
42.0
52.0
—
dB
—
—
—
—
40
2.0||17.6
5.2|| 4.6
–18
—
—
—
—
ns
kΩ || pF
kΩ || pF
ppm/K
Matching network
L
p1
= 820 nH
Please read
cautions and warnings and
important notes
at the end of this document.
3
Aug 20, 2007
SAW Components
SAW bandpass filter
Data Sheet
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
AC voltage
T
T
stg
V
DC
V
pp
–25 / +65 °C
–40 / +85 °C
5
V
10
V
X 6948 D
57.00 MHz
between any terminals
between any terminals
Please read
cautions and warnings and
important notes
at the end of this document.
4
Aug 20, 2007
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