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參數(shù)資料
| 型號： | ISL8484IUZ-T |
| 廠商： | Intersil |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SWITCH DUAL SPDT 10MSOP |
| 標準包裝： | 1 |
| 功能： | 開關 |
| 電路： | 2 x SPDT |
| 導通狀態(tài)電阻： | 500 毫歐 |
| 電壓電源： | 單電源 |
| 電壓 - 電源，單路/雙路(±)： | 1.65 V ~ 4.5 V |
| 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 10-MSOP |
| 包裝： | 剪切帶 (CT) |
| 其它名稱： | ISL8484IUZ-TCT |
9
FN6128.5
May 12, 2008
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 23 details the high off isolation and crosstalk rejection
provided by this part. At 100kHz, off isolation is about 62dB
in 50
Ω systems, decreasing approximately 20dB per decade
as frequency increases. Higher load impedances decrease
off isolation and crosstalk rejection due to the voltage divider
action of the switch OFF impedance and the load
impedance.
Leakage Considerations
Reverse 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 TA = +25°C, Unless Otherwise Specified.
FIGURE 10. ON-RESISTANCE vs SUPPLY VOLTAGE vs
SWITCH VOLTAGE
FIGURE 11. ON-RESISTANCE vs SUPPLY VOLTAGE vs
SWITCH VOLTAGE
FIGURE 12. ON-RESISTANCE vs SUPPLY VOLTAGE vs
SWITCH VOLTAGE
FIGURE 13. ON-RESISTANCE vs SWITCH VOLTAGE
01
234
5
r ON
(Ω
)
VCOM (V)
ICOM = 100mA
0.25
0.26
0.27
0.28
0.29
0.30
V+ = 4.5V
V+ = 4.3V
V+ = 3.9V
r ON
(
Ω
)
VCOM (V)
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
ICOM = 100mA
0.28
0.29
0.3
0.31
0.32
0.33
0.34
0.35
V+ = 3.3V
V+ = 3V
V+ = 2.7V
0
0.5
1.0
1.5
2.0
r ON
(
Ω
)
VCOM (V)
ICOM = 100mA
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
V+ = 2V
V+ = 1.65V
V+ = 1.8V
0
1.0
2.0
3.0
4.0
5.0
r ON
(
Ω
)
VCOM (V)
V+ = 4.3V
ICOM = 100mA
+85°C
-40°C
+25°C
0.20
0.25
0.30
0.35
ISL8484
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