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參數(shù)資料
| 型號： | ADG528FBP |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MULTIPLEXER 8X1 20PLCC |
| 產(chǎn)品培訓模塊： | Switch Fundamentals |
| 標準包裝： | 49 |
| 功能： | 多路復用器 |
| 電路： | 1 x 8:1 |
| 導通狀態(tài)電阻： | 300 歐姆 |
| 電壓電源： | 雙電源 |
| 電壓 - 電源，單路/雙路(±)： | ±15V |
| 電流 - 電源： | 100nA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-LCC（J 形引線） |
| 供應商設備封裝： | 20-PLCC（9x9） |
| 包裝： | 管件 |
ADG508F/ADG509F/ADG528F
Rev. E | Page 11 of 20
THEORY OF OPERATION
The ADG508F/ADG509F/ADG528F multiplexers are capable of
withstanding overvoltages from 40 V to +55 V, irrespective of
whether the power supplies are present or not. Each channel of
the multiplexer consists of an n-channel MOSFET, a p-channel
MOSFET, and an n-channel MOSFET, connected in series. When
the analog input exceeds the power supplies, one of the MOSFETs
will switch off, limiting the current to submicroamp levels, thereby
preventing the overvoltage from damaging any circuitry following
the multiplexer. Figure 17 illustrates the channel architecture that
enables these multiplexers to withstand continuous overvoltages.
When an analog input of VSS + 3 V to VDD 1.5 V is applied to
the ADG508F/ADG509F/ADG528F, the multiplexer behaves as
a standard multiplexer, with specifications similar to a standard
multiplexer, for example, the on-resistance is 400 Ω maximum.
However, when an overvoltage is applied to the device, one of
the three MOSFETs will turn off.
for the various overvoltage situations. When the analog input
applied to an ON channel approaches the positive power supply
line, the n-channel MOSFET turns OFF since the voltage on
the analog input exceeds the difference between VDD and the
n-channel threshold voltage (VTN). When a voltage more nega-
tive than VSS is applied to the multiplexer, the p-channel
MOSFET will turn off since the analog input is more negative
than the difference between VSS and the p-channel threshold
voltage (VTP). Since VTN is nominally 1.5 V and VTP is typically
3 V, the analog input range to the multiplexer is limited to
12 V to +13.5 V when a ±15 V power supply is used.
When the power supplies are present but the channel is off,
again either the p-channel MOSFET or one of the n-channel
MOSFETs will turn off when an overvoltage occurs.
Finally, when the power supplies are off, the gate of each
MOSFET will be at ground. A negative overvoltage switches
on the first n-channel MOSFET but the bias produced by the
overvoltage causes the p-channel MOSFET to remain turned
off. With a positive overvoltage, the first MOSFET in the series
will remain off since the gate to source voltage applied to this
MOSFET is negative.
During fault conditions, the leakage current into and out of the
ADG508F/ADG509F/ADG528F is limited to a few microamps.
This protects the multiplexer and succeeding circuitry from
over stresses as well as protecting the signal sources which drive
the multiplexer. Also, the other channels of the multiplexer will
be undisturbed by the overvoltage and will continue to operate
normally.
Q1
Q2
Q3
+55V
OVERVOLTAGE
n-CHANNEL
MOSFET IS
OFF
VDD
VSS
00
03
5-
01
7
Figure 17. +55 V Overvoltage Input to the On Channel
Q1
Q2
Q3
–40V
OVERVOLTAGE
n-CHANNEL
MOSFET IS
ON
p-CHANNEL
MOSFET IS
OFF
VSS
VDD
00
03
5-
01
8
Figure 18. 40 V Overvoltage on an Off Channel with
Multiplexer Power On
Q1
Q2
Q3
+55V
OVERVOLTAGE
n-CHANNEL
MOSFET IS
OFF
00
035
-01
9
Figure 19. +55 V Overvoltage with Power Off
Q1
Q2
Q3
–40V
OVERVOLTAGE
n-CHANNEL
MOSFET IS
ON
p-CHANNEL
MOSFET IS
OFF
00
035
-02
0
Figure 20. 40 V Overvoltage with Power Off
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相關代理商/技術參數(shù) |
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| ADG528FBP-REEL | 制造商:Analog Devices 功能描述:Analog Multiplexer Single 8:1 20-Pin PLCC T/R |
| ADG528FBPZ | 功能描述:IC MULTIPLEXER 8X1 20PLCC RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關，多路復用器，多路分解器 系列:- 應用說明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:250 系列:- 功能:開關 電路:單刀單擲 導通狀態(tài)電阻:48 歐姆 電壓電源:單電源 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V 電流 - 電源:5µA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:48-LQFP 供應商設備封裝:48-LQFP（7x7） 包裝:托盤 |
| ADG528FTQ | 制造商:AD 制造商全稱:Analog Devices 功能描述:4/8 Channel Fault-Protected Analog Multiplexers |
| ADG528FTQ/883B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Channel Analog Multiplexer |
| ADG5298HFRZ | 功能描述:1 Circuit IC Switch 8:1 350 Ohm 16-CFlatPack 制造商:analog devices inc. 系列:- 包裝:散裝 零件狀態(tài):在售 開關電路:- 多路復用器/解復用器電路:8:1 電路數(shù):1 導通電阻（最大值）:350 歐姆 通道至通道匹配（ΔRon）:1.5 歐姆 電壓 -?電源，單（V+）:9 V ~ 40 V 電壓 - 電源，雙（V±）:±9 V ~ 22 V 開關時間（Ton, Tof）（最大值）:245ns，260ns -3db 帶寬:121MHz 電荷注入:0.4pC 溝道電容 （CS(off），CD（off））:2.8pF，33pF 電流 - 漏泄（IS（off））（最大值）:8nA 串擾:-80dB @ 1MHz 工作溫度:-55°C ~ 210°C（TA） 封裝/外殼:16-CFlatPack 供應商器件封裝:16-CFlatPack 標準包裝:1 |
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