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.
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DW9249
0dB
-10dB
-20dB
-30dB
-40dB
-50dB
-60dB
Typical Response of DW9249
ELECTRICAL CHARACTERISTICS
@ 25°C
Parameter
Centre Frequency (F
O
)
-3dB Bandwidth
Group Delay Ripple (F
O
±576kHZ)
Insertion Loss
Stopband Attenuation:
F
O
±1.152MHz
F
O
±1.728MHz
F
O
±3.556MHz
F
O
±5MHz
Amplitude Ripple (pk to pk)
Operating Temperature Range
±720
±80
15
20
40
45
50
±0.4
Typ
112.320
±576
±100 (Max)
16 (Max)
>15
>30
>40
>45
±0.6
-20 to +85
Units
MHz
KHz
ns
dB
dB
dB
dB
dB
dB
°C
GPS reserves the right to modify these ‘datasheets’ when
necessary to provide optimum performance and cost.
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DW9249
PACKAGE DETAILS
Dimensions are shown thus: mm (in). For further package information, please contact your local Customer Service Centre.
HEADQUARTERS OPERATIONS
MITEL SEMICONDUCTOR
Cheney Manor, Swindon,
Wiltshire SN2 2QW, United Kingdom.
Tel: (01793) 518000
Fax: (01793) 518411
MITEL SEMICONDUCTOR
1500 Green Hills Road,
Scotts Valley, California 95066-4922
United States of America.
Tel (408) 438 2900
Fax: (408) 438 5576/6231
Internet: http://www.gpsemi.com
CUSTOMER SERVICE CENTRES
q
FRANCE & BENELUX
Les Ulis Cedex Tel: (1) 69 18 90 00 Fax : (1) 64 46 06 07
q
GERMANY
Munich Tel: (089) 419508-20 Fax : (089) 419508-55
q
ITALY
Milan Tel: (02) 6607151 Fax: (02) 66040993
q
JAPAN
Tokyo Tel: (03) 5276-5501 Fax: (03) 5276-5510
q
KOREA
Seoul Tel: (2) 5668141 Fax: (2) 5697933
q
NORTH AMERICA
Scotts Valley, USA Tel: (408) 438 2900 Fax: (408) 438 5576/6231
q
SOUTH EAST ASIA
Singapore Tel:(65) 3827708 Fax: (65) 3828872
q
SWEDEN
Stockholm Tel: 46 8 702 97 70 Fax: 46 8 640 47 36
q
TAIWAN, ROC
Taipei Tel: 886 2 25461260 Fax: 886 2 27190260
q
UK, EIRE, DENMARK, FINLAND & NORWAY
Swindon Tel: (01793) 726666 Fax : (01793) 518582
These are supported by Agents and Distributors in major countries world-wide.
© Mitel Corporation 1998 Publication No. DS3811 Issue No. 3.4 October
TECHNICAL DOCUMENTATION – NOT FOR RESALE. PRINTED IN UNITED KINGDOM
This publication is issued to provide information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded
as a representation relating to the products or services concerned. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. The Company
reserves the right to alter without prior notice the specification, design or price of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any
guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and
to ensure that any publication or data used is up to date and has not been superseded. These products are not suitable for use in any medical products whose failure to perform may result in significant injury
or death to the user. All products and materials are sold and services provided subject to the Company's conditions of sale, which are available on request.
All brand names and product names used in this publication are trademarks, registered trademarks or trade names of their respective owners.
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