DW9249
DW9249
112.32MHz SAW IF Filter
Preliminary Information
DS3811 - 3.4 October 11995
The DW9249 112.32MHz SAW I.F. filter has been
specifically developed for the Digital European Cordless
Telephone (DECT) market.
By using a centre frequency of 112.32MHz, the DW9249
overcomes the potential problems of 6th and 8th harmonic
interference often associated with filters centred at
110.592MHz.
The filter offers excellent temperature stability, (ST-Quartz
substrate) plus low Group Delay Ripple (±100ns max.) and is
available in the latest, low profile ceramic surface mount
package technology.
FEATURES
s
Extremely Low Group Delay Ripple
s
Wide Operating Temperature
s
High Co-channel rejection
s
High Adjacent Channel Rejection
s
Highly Reproduceable Impedance Characteristics
s
Balanced or Unbalanced Drive
s
Low Profile Leadless Ceramic Surface Mount Package
Suitable for Automated Assembly
ABSOLUTE MAXIMUM RATINGS
DC Voltage
Input Power Max.
VDC
PIN
0V
10dBm
NOMINAL IMPEDANCE
Input:
Output:
1.1kΩ // 9.25pF
1.2kΩ // 12pF
50Ω TEST BOARD COMPONENTS
Input:
Output:
Series Ind. 180nH, Shunt Cap. 60.7pF
Series Ind. 100nH
Components: Coilcraft 1008CS Inductors : Murata 0805 Capacitors
ORDERING INFORMATION
DW9249
REFERENCE APPLICATION NOTE:
DW9249 - SAW Bandpass Filter for D.E.C.T.
1
MITEL [ MITEL NETWORKS CORPORATION ]
