參數(shù)資料
型號(hào): ADG5204BRUZ
廠商: Analog Devices Inc
文件頁數(shù): 9/20頁
文件大?。?/td> 0K
描述: MUX 4CH LATCH-UP PROOF 14TSSOP
標(biāo)準(zhǔn)包裝: 96
功能: 多路復(fù)用器
電路: 1 x 4:1
導(dǎo)通狀態(tài)電阻: 170 歐姆
電壓電源: 單/雙電源
電壓 - 電源,單路/雙路(±): 9 V ~ 40 V,±9 V ~ ±22 V
電流 - 電源: 85µA
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 14-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 14-TSSOP
包裝: 管件
ADG5204
Rev. 0 | Page 17 of 20
TRENCH ISOLATION
In the ADG5204, an insulating oxide layer (trench) is placed
between the NMOS and the PMOS transistors of each CMOS
switch. Parasitic junctions, which occur between the transistors
in junction isolated switches, are eliminated, and the result is a
completely latch-up proof switch.
In junction isolation, the N and P wells of the PMOS and
NMOS transistors form a diode that is reverse-biased under
normal operation. However, during overvoltage conditions, this
diode can become forward-biased. A silicon controlled rectifier
(SCR) type circuit is formed by the two transistors causing a
significant amplification of the current that, in turn, leads to
latch-up. By using trench isolation, this diode is removed, and
the result is a latch-up proof switch.
NMOS
PMOS
P WELL
N WELL
BURIED OXIDE LAYER
HANDLE WAFER
TRENCH
09
76
8-
0
04
Figure 33. Trench Isolation
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