FN6549.2 November 9, 2009 very consistent over a wide V+ range, and for varying analog signal levels. An OFF switch acts like a capacitor and pa" />
參數(shù)資料
型號(hào)： ISL54500IHZ-T
廠商： Intersil
文件頁數(shù)： 13/13頁
文件大?。?/td> 0K
描述： IC SWITCH SPDT SGL SOT23-6
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： 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： 20nA
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： SOT-23-6
供應(yīng)商設(shè)備封裝： SOT-23-6
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： ISL54500IHZ-TDKR
9
FN6549.2
November 9, 2009
very consistent over a wide V+ range, and for varying
analog signal levels.
An OFF switch acts like a capacitor and passes higher
frequencies with less attenuation, resulting in signal
feedthrough from a switch’s input to its output.
Off-isolation is the resistance to this feedthrough, while
crosstalk indicates the amount of feedthrough from
one switch to another. Figure 18 details the high
off-isolation provided by this family. At 1MHz,
of-isolation is about 75dB 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.
Typical Performance Curves T
A = +25°C, Unless Otherwise Specified
FIGURE 10. ON-RESISTANCE vs SUPPLY VOLTAGE vs
SWITCH VOLTAGE
FIGURE 11. ON-RESISTANCE vs SWITCH VOLTAGE
FIGURE 12. ON-RESISTANCE vs SWITCH VOLTAGE
FIGURE 13. ON-RESISTANCE vs SWITCH VOLTAGE
r ON
(
Ω
)
VCOM (V)
01
2345
0
1
2
3
4
5
6
7
8
ICOM = 100mA
V+ = 2.7V
V+ = 3V
V+ = 4.5V
V+ = 5V
r ON
(
Ω
)
VCOM (V)
1
2
3
4
5
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
V+ = 4.5V
ICOM = 100mA
+25°C
+85°C
-40°C
6
r ON
(
Ω
)
VCOM (V)
2
3
4
5
6
7
8
0
0.5
1.0
1.5
2.0
2.5
V+ = 2.7V
ICOM = 100mA
+25°C
+85°C
-40°C
r ON
(
Ω)
VCOM (V)
2
3
4
5
6
7
8
9
10
11
12
13
14
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
V+ = 1.8V
ICOM = 10mA
+25°C
+85°C
-40°C
ISL54500
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