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參數(shù)資料
| 型號： | ISL54049IRUZ-T |
| 廠商： | INTERSIL CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | Ultra Low ON-Resistance, +1.65V to +4.5V, Single Supply, Dual SPST Analog Switch |
| 中文描述： | DUAL 1-CHANNEL, SGL POLE SGL THROW SWITCH, QCC10 |
| 封裝： | 1.8 X 1.4 MM, 0.5 MM HEIGHT, ROHS COMPLIANT, PLASTIC, MO-255, MICRO, TQFN-10 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 254K |
| 代理商： | ISL54049IRUZ-T |
7
FN6469.0
March 20, 2007
Detailed Description
The ISL54048 and ISL54049 are bidirectional, dual single
pole/single throw (SPST) analog switches that offer precise
switching capability from a single 1.65V to 4.5V supply with
low on-resistance (0.29
Ω
) and high speed operation
(t
ON
= 40ns, t
OFF
= 20ns). The devices are especially well
suited for portable battery powered equipment due to their
low operating supply voltage (1.65V), low power
consumption (4.5μW max), low leakage currents (195nA max)
and the tiny μTQFN package. The ultra low ON-resistance
and r
ON
flatness provide very low insertion loss and distortion
to applications that require signal reproduction.
Supply Sequencing and Overvoltage Protection
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 GND (see
Figure 7). To prevent forward biasing these diodes, V+ must
be applied before any input signals, and the input signal
voltages must remain between V+ and GND.
If these conditions cannot be guaranteed, then precautions
must be implemented to prohibit the current and voltage at
the logic pin and signal pins from exceeding the maximum
ratings of the switch. The following two methods can be used
to provided additional protection to limit the current in the
event that the voltage at a signal pin or logic pin goes below
ground or above the V+ rail.
Logic inputs can be protected by adding a 1k
Ω
resistor in
series with the logic input (see Figure 7). 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.
This method is not acceptable for the signal path inputs.
Adding a series resistor to the switch input defeats the
purpose of using a low r
ON
switch. Connecting schottky
diodes to the signal pins (as shown in Figure 7) will shunt the
fault current to the supply or to ground thereby protecting the
switch. These schottky diodes must be sized to handle the
expected fault current.
Power-Supply Considerations
The ISL54048 and ISL54049 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 ISL54048
and ISL54049 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 “Electrical Specifications” on page 3 and the
Typical
Performance
Curves
on page 8 for details.
FIGURE 5. CROSSTALK TEST CIRCUIT
FIGURE 6. CAPACITANCE TEST CIRCUIT
Test Circuits and Waveforms
(Continued)
0V or V+
ANALYZER
V+
C
SIGNAL
GENERATOR
R
L
GND
IN
1
COM
50
Ω
N.C.
COM
Signal direction through switch is reversed, worst case values
are recorded. Repeat test for all switches.
NX1 OR NX2
NX1 OR NX2
V+
C
GND
COM
IN
IMPEDANCE
ANALYZER
0V or V+
Repeat test for all switches.
NX1 OR NX2
FIGURE 7. OVERVOLTAGE PROTECTION
GND
V
COM
V
NX
V+
IN
X
OPTIONAL
PROTECTION
RESISTOR
OPTIONAL
SCHOTTKY
DIODE
OPTIONAL
SCHOTTKY
DIODE
ISL54048, ISL54049
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL54050 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Ultra Low ON-Resistance, +1.65V to +4.5V, Single Supply, Dual SPDT Analog Switch |
| ISL54050_0706 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Ultra Low ON-Resistance, +1.65V to +4.5V, Single Supply, Dual SPDT Analog Switch |
| ISL54050IRUZ-T | 功能描述:IC SWITCH DUAL SPDT UTQFN 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:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:開關(guān) 電路:2 x SPST - NC/NO 導(dǎo)通狀態(tài)電阻:8 歐姆 電壓電源:單電源 電壓 - 電源，單路/雙路(±):2.3 V ~ 4.3 V 電流 - 電源:1µA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-UFQFN 供應(yīng)商設(shè)備封裝:8-迷你型QFN（1.4x1.4） 包裝:剪切帶 (CT) 其它名稱:DG2738DN-T1-E4CT |
| ISL54050IRUZ-T7A | 功能描述:IC ANLG SWITCH DUAL SPDT 10TQFN 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 |
| ISL54051 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Ultra Low ON-Resistance, Low Voltage, Single Supply, Single SPST Analog Switches |
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