FN6551.2 October 26, 2009 An OFF switch behaves like a capacitor and passes higher frequencies with less attenuation, resulting in signal feed-t" />
參數(shù)資料
型號(hào): ISL54503IRUZ-T
廠商: Intersil
文件頁數(shù): 13/13頁
文件大小: 0K
描述: IC SWITCH SPDT SGL 6UTDFN
產(chǎn)品培訓(xùn)模塊: Patient Monitoring and Diagnostic Equipment Solutions
標(biāo)準(zhǔn)包裝: 1
功能: 開關(guān)
電路: 1 x SPDT
導(dǎo)通狀態(tài)電阻: 2.5 歐姆
電壓電源: 單電源
電壓 - 電源,單路/雙路(±): 1.8 V ~ 5.5 V
電流 - 電源: 28nA
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 6-UFDFN
供應(yīng)商設(shè)備封裝: 6-UTDFN(1.2x1.0)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: ISL54503IRUZ-TDKR
9
FN6551.2
October 26, 2009
An OFF switch behaves like a capacitor and passes
higher frequencies with less attenuation, resulting in
signal feed-through from a switch’s input to output.
Off-isolation is the resistance of this signal
feed-through. Figure 18 details the high off-isolation
provided by the ISL54503. At 1MHz, off-isolation is
about 70dB in 50Ω systems, decreasing approximately
20dB per decade as frequency increases. Higher load
impedances decrease off-isolation due to the voltage
divider action of the switch OFF impedance and the
load impedance.
Leakage Considerations
ESD protection diodes are internally connected
between each analog-signal pin and both V+ and GND.
One of these diodes conducts if any analog signal
exceeds V+ or GND.
Virtually all the analog leakage current comes from the
ESD diodes to V+ or GND. Although the ESD diodes on
a given signal pin are identical and therefore fairly well
balanced, they are reverse biased differently. Each is
biased by either V+ or GND and the analog signal. This
means their leakages will vary as the signal varies. The
difference in the two diode leakages to the V+ and
GND pins constitutes the analog-signal-path leakage
current. All analog leakage current flows between each
pin and one of the supply terminals, not to the other
switch terminal. This is why both sides of a given
switch can show leakage currents of the same or
opposite polarity. There is no connection between the
analog signal paths and V+ or GND.
ISL54503
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