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DW9255

更新时间: 2024-02-13 15:39:35
品牌 Logo 应用领域
MITEL 全球定位系统LTE
页数 文件大小 规格书
5页 37K
描述
35.42MHz SAW Filter for GPS Receivers

DW9255 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
Reach Compliance Code:unknown风险等级:5.68
最大衰减频率 (+/- delta f):1920 kHz最大频率时的衰减:25 dB
中心频率或截止频率 (fo/fc):35.42 MHz滤波器类型:SAW FILTER
高度:2.25 mm输入阻抗:500 OHM
最大插入损耗:18 dBJESD-609代码:e0
长度:13.7 mm安装类型:SURFACE MOUNT
功能数量:1端子数量:12
最高工作温度:85 °C最低工作温度:-40 °C
输出阻抗:1000 OHM Ω包装材料:CERAMIC
物理尺寸:L13.7XB6.7XH2.25 (mm)/L0.539XB0.264XH0.089 (inch)子类别:SAW Filters
技术:HYBRID端子面层:Tin/Lead (Sn/Pb)
宽度:6.7 mmBase Number Matches:1

DW9255 数据手册

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DW9255  
35.42MHz SAW Filter for GPS Receivers  
DS3861 - 3.1 November 1997  
The DW9255 is a Surface Acoustic Wave (SAW) bandpass  
filter for use with the GP2000 Global Positioning System  
(GPS) receiver chip-set, available from Mitel Semiconductor.  
It is pre-tuned to the exact 2nd IF filter requirements of the  
GP2010 & GP2015 RF front-end devices, with a centre-  
frequency of 35.42MHz. The response is tuned for a flat  
passband, steep stopband and uniform passband group-delay  
with 3 external inductors. The device is realised on a Lithium  
Tantalate substrate and housed in a small leadless ceramic  
Surface Mount package.  
The DW9255 gives significant improvement in correlated  
GPS Signal-to-Noise Ratio (SNR) performance compared to  
conventional LC bandpass filter schemes. This aids satellite  
signal acquisition and tracking capability from the GP2000  
GPS chip-set. This device effectively filters out-of-band  
(unwanted) noise in the GPS signal. The Automatic Gain  
Control (AGC) within the GP2010 and GP2015 RF Front-end  
devices will then operate only on in-band noise for optimum  
gain and superior correlated GPS signal strength.  
2
1
3
4
5
6
12  
11  
10  
9
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
DW9255  
7
8
LCS12/1  
FEATURES  
Centre Frequency of 35.42MHz  
Insertion Loss of 17dB ±1dB (typical)  
1dB Bandwidth 1.9MHz (typical)  
Passband Ripple 0.8dB (typical)  
Low Profile Ceramic Surface Mount Package  
Operating Temperature Range -40° to +85°C  
2
1
3
12  
11  
10  
9
GND  
GND  
GND  
GND  
GND  
4
5
6
GND  
GND  
GND  
DW9255  
APPLICATION  
Commercial Global Positioning  
RELATED PRODUCTS AND PUBLICATIONS  
Data  
7
8
Part  
Description  
Reference  
LCS12/4  
GP2010  
GP2015  
GPS receiver RF Front-end  
DS4056  
Miniature GPS receiver  
RF Front-end  
DS4374  
Fig.1 Pinout  

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