DW9268
DW9268
240.192MHz IF SAW Filter
Advance Information
DS4025 - 1.4 October 1995
The DW9268 has been designed specifically for the Digital
Cordless Personal Communications market as an IF filter with
a centre frequency of 240.192MHz. The filter utilises GPS's
low loss (7dB typical), Transversal filter technology based on a
Quartz substrate for excellent temperature stability.
A 3dB passband of 1.3MHz (typical) is maintained whilst
providing rejection to adjacent and alternate interferers
compliant to the DECT Common Interface specification Part 2
- The Physical Layer. The device also exhibits excellent close-
in and ultimate rejection, which combined with a Group Delay
Ripple of 200ns maximum makes the DW9268 and ideal IF
filter for Digital Cordless Personal Communications systems.
The device is packaged in a surface mount, leadless
ceramic chip carrier, suited to high volume automated
assembly systems.
FEATURES
s
240.192MHz Centre Frequency (fo)
s
Low Insertion Loss (8dB maximum)
s
3dB Passband 1.3MHz (typical)
s
Quartz Temperature Stability
s
Low Profile Ceramic LCC Package
ABSOLUTE MAXIMUM RATINGS
DC Voltage
Input Power Max.
VDC
PIN
0V
10dBm
NOMINAL IMPEDANCE
Input:
Output:
500鈩?// 16pF
625鈩?// 14pF
50鈩?TEST BOARD COMPONENTS
Input:
Output:
Shunt Cap. 45pF, Series Ind. 47nH
Series Ind. 47nH, Shunt Cap. 34pF
Components: Coilcraft 1008CS Inductors : Murata 0805 Capacitors
ORDERING INFORMATION
DW9268
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