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DW9276
DESCRIPTION
The DW9276 is a 71MHz IF SAW filter which has been
specifically designed for cellular radio architectures using
the highly integrated `Sceptre'TM hardware platform for
GSM from AT&T Microelectronics.
Based on quartz for excellent temperature stability, the
DW9276 provides very high channel selectivity, low
Group Delay Ripple and Insertion Loss. Packaged in a
Surface Mount, low profile leadless chip carrier, the
DW9276 is ideally suited to high volume automatic
assembly systems.
ABSOLUTE MAXIMUM RATINGS
DC voltage
VDC
0V
Input Power Max
Pin
10dBm
NOMINAL IMPEDANCE
Input:
648
// 25pF
Output:
1177
// 19pF
50
TEST BOARD COMPONENTS
Input: Shunt Cap 6.8pF, Series IND 220nH, Shunt Cap 80pF
Output: Series Ind 300nH, Shunt Cap 80pF
Components: Coilcraft 1008CS Inductors: Murata 0805 Capacitors
ODERING INFORMATION
For balanced order DW9276B)
For unbalanced order DW9276U
INPUT
GND CASE
GND CASE
GND CASE
OUTPUT RETURN
INPUT RETURN
GND CASE
GND CASE
GND CASE
OUTPUT
5
4
3
2
1
DW9276 (U/B)
6
7
8
9
10
LCS10/1
Figure 1: Pin connections
DW9276
71MHz IF SAW Filter
Replaces January 2000 version, DS4087-3.0
DS4087-3.1 July 2002
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DW9276
ELECTRICAL CHARACTERISTICS @ 25
C
Parameter
Min.
Typ.
Max.
Units
Centre Frequency (fo)
-
71.0
-
MHz
3dB Bandwidth
85
160
-
kHz
Insertion Loss
-
7.0
8.0
dB
Group Delay Ripple
-
250
400
ns
Amplitude Ripple*
-
0.2
0.5
dB
Stopband Rejection:
fo
400 - 600kHz
20
25
-
dB
fo
600 - 1600kHz
24
26
-
dB
fo
1600 - 3000kHz
30
40
-
dB
fo >
3000kHz
40
47
-
dB
Operating Temperature
-10
-
+55
C
Temperature Delta
-8.5
-
-
kHz
*Adjacent minima to maxima in 3dB bandwidth.
Figure 2: Amplitude Characteristics
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DW9276
PACKAGE DETAILS
Dimensions are shown thus: mm (in). DO NOT SCALE. For further package information, please contact Customer Services.
10-PAD LEADLESS CHIP CARRIER (SLAM) - LCS10/1
NOTES
1. Controlling dimensions are millimetres.
2. This package outline diagram is for guidance
only. Please contact the Dynex Semiconductor
Customer Service Centre for further information.
5
4
3
2
1
6
7
8
9
10
1534/1566
(060/062)
780/820
(031/032)
1570/1610
(062/063)
160/180
(006/007)
056/072
(0022/0028)
102 (0040)
TYP.
340 (0134)
TYP.
1905 (0075)
762 (0300)
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