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DW9256 Datasheet

  • DW9256

  • 133MHz SAW Filter for Personal Communications

  • 4頁(yè)

  • ETC

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DW9256
DW9256
133MHZ SAW Filter
Replaces January 2000 version, DS4026-2.0
DS4026-2.1 July 2002
The DW9256 has been designed specifically for the Personal
Communications market, as an IF filter with a centre frequency of
133MHz. The filter utilises Dynex Semiconductor's low loss
Transversal filter technology based on a Quartz substrate for
excellent temperature stability.
A minimum 3dB passband of
鹵75kHz
is combined with a high
shape factor to give good adjacent channel rejection.
The device is available in a surface mount, ceramic leadless
chip carrier, suited to high volume automated assembly systems.
INPUT
INPUT RETURN
GND
GND
GND
GND
GND
GND
GND
14
13
12
11
10
9
8
7
6
1
15
16
17
18
GND
GND
GND
OUTPUT RETURN
OUTPUT
FEATURES
I
133MHz Centre Frequency (fo)
I
Low Insertion Loss (7dB maximum)
I
3dB Passband
鹵75kHz
(minimum)
I
Quartz Temperature Stability
I
Low Profile Ceramic LCC Package
2
3
4
5
GND
GND
GND
GND
DW9256
LCS18
Fig.1 Pin connections
ABSOLUTE MAXIMUM RATINGS
DC Voltage
Input Power Max.
VDC
PIN
0V
10dBm
NOMINAL IMPEDANCE
Input:
Output:
520鈩?// 20pF
200鈩?// 30pF
50
鈩?/div>
TEST BOARD COMPONENTS
Input:
Output:
Series Ind. 180nH, Shunt Ind. 100nH, Shunt Cap. 2.2pF
Shunt Ind. 68nH, Series Ind. 82nH
Components: Coilcraft 1008CS Inductors : Murata 0805 Capacitors
ORDERING INFORMATION
Order as:
DW9256
1/4
www.dynexsemi.com

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