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參數(shù)資料
| 型號： | QFA0305SMTF |
| 廠商： | EMC TECHNOLOGY INC |
| 元件分類： | 衰減器 |
| 英文描述： | 40000 MHz - 50000 MHz RF/MICROWAVE FIXED ATTENUATOR |
| 封裝： | ROHS COMPLIANT PACKAGE-4 |
| 文件頁數(shù)： | 5/7頁 |
| 文件大小： | 210K |
| 代理商： | QFA0305SMTF |
05. 21. 2 0 1 0
DATA SHEET
QFAXX0XSMTF
5
emct.com rflabs.com 772-286-9300
AS 9100, ISO 9001, ISO 14001, OHSAS 18001 Certified
COMMONLY USED ATTACHMENT MATERIALS
Material
Composition
Thermal Conductivity
( Watts/cm/
°C )
Melting Temperature
(
°C )
Gold-Tin Solder
80% Gold / 20% Tin
0.58
280
Lead-Free Solder
99.3% Tin – 0.7% Copper
N/A
227
Lead-Free Solder
96.5% Tin / 3.5% Silver
0.33
221
Lead-Free Solder
96.5% Tin / 3% Silver / 0.5% Copper
N/A
217 - 220
Sn63 Solder
63% Tin / 37% Lead
0.49
183
Conductive Epoxy
Silver Filled
0.01 to 0.29
N/A
CIRCUIT BOARD LAYOUT QFAXX04SMTF
In order to achieve the specified RF performance, an optimized RF test board must be used for testing this attenuator.
Florida RF Labs test board (008-40-099) constructed with a 0.010 in Rogers RO4350B high frequency board material is
shown below.
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| QFA0305SMT | 40000 MHz - 50000 MHz RF/MICROWAVE FIXED ATTENUATOR |
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| QFSS-026-04.25-L-D-A-PC4 | 60 CONTACT(S), FEMALE, STRAIGHT BOARD STACKING CONNECTOR, SURFACE MOUNT, SOCKET |
| QFSS-032-04.25-L-D-DP-A-PC4 | 72 CONTACT(S), FEMALE, STRAIGHT BOARD STACKING CONNECTOR, SURFACE MOUNT, SOCKET |
| QFSS-048-04.25-L-D-DP-A-PC4 | 104 CONTACT(S), FEMALE, STRAIGHT BOARD STACKING CONNECTOR, SURFACE MOUNT, SOCKET |
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