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參數(shù)資料
| 型號(hào)： | ISL8484IU |
| 廠商： | INTERSIL CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Octal D-Type Transparent Latches With 3-State Outputs 20-SO -40 to 85 |
| 中文描述： | DUAL 1-CHANNEL, SGL POLE DOUBLE THROW SWITCH, PDSO10 |
| 封裝： | PLASTIC, MO-187BA, MSOP-10 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大?。?/td> | 460K |
| 代理商： | ISL8484IU |
8
FN6128.0
February 25, 2005
overvoltage protection for all pins (see Figure 8). These
additional diodes limit the analog signal from 1V below V+ to
1V above GND. The low leakage current performance is
unaffected by this approach, but the switch signal range is
reduced and the resistance may increase, especially at low
supply voltages.
Power-Supply Considerations
The ISL8484 construction is typical of most single supply
CMOS analog switches, in that they have two supply pins:
V+ and GND. V+ and GND drive the internal CMOS switches
and set their analog voltage limits. Unlike switches with a 4V
maximum supply voltage, the ISL8484 4.7V maximum
supply voltage provides plenty of room for the 10% tolerance
of 4.3V supplies, as well as room for overshoot and noise
spikes.
The minimum recommended supply voltage is 1.65V. 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.
V+ and GND also power the internal logic and level shiftiers.
The level shiftiers convert the input logic levels to switched
V+ and GND signals to drive the analog switch gate
terminals.
This family of switches cannot be operated with bipolar
supplies, because the input switching point becomes
negative in this configuration.
Logic-Level Thresholds
This switch family is 1.8V CMOS compatible (0.5V and 1.4V)
over a supply range of 2.7V to 4.5V (see Figure 16). At 2.7V
the V
IL
level is about 0.53V. This is still above the 1.8V
CMOS guaranteed low output maximum level of 0.5V, but
noise margin is reduced.
The digital input stages draw supply current whenever the
digital input voltage is not at one of the supply rails. Driving
the digital input signals from GND to V+ with a fast transition
time minimizes power dissipation. The ISL8484 has been
designed to minimize the supply current whenever the digital
input voltage is not driven to the supply rails (0V to V+). For
example driving the device with 2.85V logic (0V to 2.85V)
while operating with a 4.2V supply the device draws only 8
μ
A
of current (see Figure 14 for VIN = 2.85V).
High-Frequency Performance
In 50
systems, the signal response is reasonably flat even
past 30MHz with a -3dB bandwidth of 120MHz (see
Figure 19). The frequency response is 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 20 details the high Off Isolation and Crosstalk
rejection provided by this part. At 100kHz, Off Isolation is
about 68dB in 50
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.
FIGURE 8. OVERVOLTAGE PROTECTION
GND
V
COM
V
NO or NC
OPTIONAL PROTECTION
DIODE
V+
IN
X
OPTIONAL PROTECTION
DIODE
OPTIONAL
PROTECTION
RESISTOR
ISL8484
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL8484IU-T | Ultra Low ON-Resistance, +1.65V to +4.5V, Single Supply, Dual SPDT Analog Switch |
| ISL8484 | Ultra Low ON-Resistance, +1.65V to +4.5V, Single Supply, Dual SPDT Analog Switch(超低導(dǎo)通電阻，+1.65V至+4.5V, 單電源, 雙路單刀雙擲模擬開關(guān)) |
| ISL8485ECB-T | ESD Protected to 【15kV, 5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers |
| ISL8485EIB-T | Header; No. of Contacts:24; Pitch Spacing:0.165"; No. of Rows:2; Gender:Female; Series:Mini-Fit Jr. 5557; Body Material:Nylon 6/6 RoHS Compliant: Yes |
| ISL8483EIP | Octal D-Type Transparent Latches With 3-State Outputs 20-SOIC -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL8484IU-T | 功能描述:IC SWITCH DUAL SPDT 10MSOP 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(biāo)準(zhǔn)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) |
| ISL8484IUZ | 功能描述:IC SWITCH DUAL SPDT 10MSOP 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(biāo)準(zhǔn)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 |
| ISL8484IUZ-T | 功能描述:IC SWITCH DUAL SPDT 10MSOP 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(biāo)準(zhǔn)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 |
| ISL8485 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers |
| ISL8485CB | 功能描述:TRANSCEIVER RS485/522 5V 8-SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:25 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:4.5 V ~ 5.5 V 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:16-PDIP 包裝:管件 |
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