參數(shù)資料
型號(hào)： DG541DY
英文描述： Wideband/Video “T” Switches
中文描述： 寬帶/視頻“T”型開(kāi)關(guān)
文件頁(yè)數(shù)： 9/10頁(yè)
文件大?。?/td> 154K
代理商： DG541DY
DG540/541/542
Siliconix
S-53694—Rev. E, 28-May-97
9
Applications (Cont’d)
Power Supplies
A useful feature of the DG54X family is its power supply
flexibility. It can be operated from a single positive supply
(V+) if required (V– connected to ground).
Note that the analog signal must not exceed V– by more
than –0.3 V to prevent forward biasing the substrate p-n
junction. The use of a V– supply has a number of
advantages:
8 %003;7 *0)<-&-0-8= -2 %2%03+ 7-+2%0 ,%2(0-2+ -)
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32
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%2( +%-2 3''967 ;,)2 ! -7 %6392( !
32
# 1%= &)
'%97)7
:%6-397
*36 %2 -2'6)%7-2+ !
! )0-1-2%8)7 8,) 2))( 83 &-%7 8,) %2%03+ 7-+2%0
97-2+
438)28-%0
(-:-()67
'%4%'-8367
%2(
0%6+)
'3940-2+
Decoupling
It is an established RF design practice to incorporate
sufficient bypass capacitors in the circuit to decouple the
power supplies to all active devices in the circuit. The
dynamic performance of the DG54X is adversely affected
by poor decoupling of power supply pins. Also, of even
more significance, since the substrate of the device is
connected to the negative supply, adequate decoupling of
this pin is essential.
Rules:
)'3940-2+ '%4%'-8367 7,390( &) -2'36436%8)( 32
%00 43;)6 79440= 4-27 ! ! )) -+96)
,)= 7,390( &) 13928)( %7 '037) %7 4377-&0) 83 8,)
():-') 4-27
%4%'-8367 7,390( ,%:) +33( ,-+, *6)59)2'=
',%6%'8)6-78-'7 8%28%091 &)%( %2(36 13230-8,-'
')6%1-' 8=4)7 %6) %()59%8)
9-8%&0) ()'3940-2+ '%4%'-8367 %6) > 83 >
8%28%091 &)%( 4097 > 83 >2 ')6%1-'
+
+
–3 V
GNDs
+15 V
DG540
V+
V–
S
1
S
2
S
3
S
4
D
1
D
2
D
3
D
4
C
1
C
2
C
1
C
2
C
1
= 10 F Tantalum
C
2
= 0.1 F Ceramic
Figure 7.
Supply Decoupling
Board Layout
PCB layout rules for good high frequency performance
must be observed to achieve the performance boasted by the
DG540. Some tips for minimizing stray effects are:
7) )<8)27-:) +6392( 40%2)7 32 (39&0) 7-()(
7)4%6%8-2+ %(.%')28 7-+2%0 4%8,7 908-0%=)6 -7
):)2 &)88)6
))4 7-+2%0 4%8,7 %7 7,368 %7 46%'8-'%00= 4377-&0)
;-8, %00 ',%22)0 4%8,7 3* 2)%6 )59%0 0)2+8,
%6)*90 %66%2+)1)28 3* +6392( '322)'8-327 -7 %073
:)6= -14368%28 8%6 '322)'8)( 7=78)1 +6392(7
)0-1-2%8) 7-+2%0 '966)28 *03;-2+ 8,639+, +6392(
4%8, 4%6%7-8-' 6)7-78%2') *631 '3940-2+ &)8;))2
',%22)07
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DG541DY-E3 功能描述:視頻開(kāi)關(guān) IC SPST Wideband T-Sw RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel
DG541DY-T1 功能描述:視頻開(kāi)關(guān) IC SPST Wideband T-Sw RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel
DG541DY-T1-E3 功能描述:視頻開(kāi)關(guān) IC SPST Wideband T-Sw RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel
DG542 制造商:VISHAY 制造商全稱(chēng):Vishay Siliconix 功能描述:Wideband/Video T Switches
DG542AP 功能描述:視頻開(kāi)關(guān) IC SPDT Wideband T-Sw RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel
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