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參數(shù)資料
| 型號： | ISL84523 |
| 廠商： | Intersil Corporation |
| 英文描述： | Low-Voltage, Single and Dual Supply, Quad SPST, Analog Switches |
| 中文描述： | 低電壓，單和雙電源，四路SPST模擬開關(guān) |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 365K |
| 代理商： | ISL84523 |
7
Detailed Description
The ISL84521, ISL84522, ISL84523 quad analog switches
offer precise switching capability from a bipolar
±
2V to
±
6V
or a single 2V to 12V supply with low on-resistance (65
)
and high speed switching (t
ON
= 45ns, t
OFF
= 15ns). The
devices are especially well suited to portable battery
powered equipment thanks to the low operating supply
voltage (2V), low power consumption (1
μ
W) and low leakage
currents (1nA max). High frequency applications also benefit
from the wide bandwidth, and the very high OFF isolation and
crosstalk rejection.
Supply Sequencing And Overvoltage Protection
As with any CMOS device, proper power supply sequencing
is required to protect the device from excessive input
currents which might permanently damage the IC. All I/O
pins contain ESD protection diodes from the pin to V+ and to
V- (Figure 8). To prevent forward biasing these diodes, V+
and V- must be applied before any input signals, and input
signal voltages must remain between V+ and V-. If these
conditions cannot be guaranteed, then one of the following
two protection methods should be employed.
Logic inputs can easily be protected by adding a 1k
resistor in series with the input (Figure 8). The resistor limits
the input current below the threshold that produces
permanent damage, and the sub-microamp input current
produces an insignificant voltage drop during normal
operation.
Adding a series resistor to the switch input defeats the
purpose of using a low R
ON
switch, so two small signal
diodes can be added in series with the supply pins to provide
overvoltage protection for all pins (Figure 8). These
additional diodes limit the analog signal from 1V below V+ to
1V above V-. The low leakage current performance is
unaffected by this approach, but the switch resistance may
increase, especially at low supply voltages.
Power-Supply Considerations
The ISL8452X construction is typical of most CMOS analog
switches, in that they have three supply pins: V+, V-, and
GND. V+ and V- drive the internal CMOS switches and set
their analog voltage limits, so there are no connections
between the analog signal path and GND. Unlike switches
with a 13V maximum supply voltage, the ISL8452X 15V
maximum supply voltage provides plenty of room for the
10% tolerance of 12V supplies (
±
6V or 12V single supply),
as well as room for overshoot and noise spikes.
This family of switches performs equally well when operated
with bipolar or single voltage supplies, and bipolar supplies
need not be symmetrical. The minimum recommended
supply voltage is 2V or
±
2V. It is important to note that the
input signal range, switching times, and ON-resistance
degrade at lower supply voltages. Refer to the electrical
specification tables and
Typical Performance
Curves
for
details.
FIGURE 6. CROSSTALK TEST CIRCUIT
FIGURE 7. CAPACITANCE TEST CIRCUIT
Test Circuits and Waveforms
(Continued)
0V or 2.4V
ANALYZER
V+
C
NO1 OR NC1
SIGNAL
GENERATOR
R
L
GND
IN2
COM1
IN2
50
0V OR 2.4V
NO
CONNECTION
COM2
NO2 OR NC2
C
V-
V+
GND
NO OR NC
COM
IN
IMPEDANCE
ANALYZER
0V OR 2.4V
V-
FIGURE 8. OVERVOLTAGE PROTECTION
V-
V
COM
V
NO OR NC
OPTIONAL PROTECTION
DIODE
V+
IN
X
OPTIONAL PROTECTION
DIODE
OPTIONAL
PROTECTION
RESISTOR
ISL84521, ISL84522, ISL84523
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL84523IV | Low-Voltage, Single and Dual Supply, Quad SPST, Analog Switches |
| ISL84521IB | Low-Voltage, Single and Dual Supply, Quad SPST, Analog Switches |
| ISL84522IB | Low-Voltage, Single and Dual Supply, Quad SPST, Analog Switches |
| ISL84542CB | Low-Voltage, Single Supply, Dual SPST, SPDT Analog Switches |
| ISL84543IH-T | Low-Voltage, Single Supply, Dual SPST, SPDT Analog Switches |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL84523IB | 功能描述:IC SWITCH QUAD SPST 16SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:- 電路:2 x SPST 導(dǎo)通狀態(tài)電阻:20 歐姆 電壓電源:單電源 電壓 - 電源，單路/雙路(±):3 V ~ 5.5 V 電流 - 電源:4.1mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:帶卷 (TR) |
| ISL84523IB-T | 功能描述:IC SWITCH QUAD SPST 16SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:- 電路:2 x SPST 導(dǎo)通狀態(tài)電阻:20 歐姆 電壓電源:單電源 電壓 - 電源，單路/雙路(±):3 V ~ 5.5 V 電流 - 電源:4.1mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:帶卷 (TR) |
| ISL84523IBZ | 功能描述:IC SWITCH QUAD SPST 16SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:36 系列:- 功能:多路復(fù)用器 電路:2 x 4:1 導(dǎo)通狀態(tài)電阻:75 歐姆 電壓電源:單/雙電源 電壓 - 電源，單路/雙路(±):2 V ~ 12 V，±2 V ~ 6 V 電流 - 電源:- 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:20-SOIC W 包裝:管件 |
| ISL84523IBZ-T | 功能描述:IC SWITCH QUAD SPST 16SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:36 系列:- 功能:多路復(fù)用器 電路:2 x 4:1 導(dǎo)通狀態(tài)電阻:75 歐姆 電壓電源:單/雙電源 電壓 - 電源，單路/雙路(±):2 V ~ 12 V，±2 V ~ 6 V 電流 - 電源:- 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:20-SOIC W 包裝:管件 |
| ISL84523IR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Switch |
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