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參數(shù)資料
| 型號(hào)： | ISL54049IRUZ-T |
| 廠商： | Intersil |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大小： | 0K |
| 描述： | IC SWITCH DUAL SPST 10UTQFN |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 功能： | 開(kāi)關(guān) |
| 電路： | 2 x SPST - NC |
| 導(dǎo)通狀態(tài)電阻： | 300 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-UFQFN |
| 供應(yīng)商設(shè)備封裝： | 10-UTQFN（1.8x1.40） |
| 包裝： | 帶卷 (TR) |
7
FN6469.1
June 11, 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
(tON = 40ns, tOFF = 20ns). The devices are especially well
suited for portable battery powered equipment due to their
low operating supply voltage (1.65V), low power
consumption (4.5W max), low leakage currents (195nA max)
and the tiny TQFN package. The ultra low ON-resistance
and rON flatness provide very low insertion loss and distortion
to applications that require signal reproduction.
External V+ Series Resistor
For improved ESD and latch-up immunity, Intersil
recommends adding a 100
Ω resistor in series with the V+
power supply pin of the IC (see Figure 7).
During an overvoltage transient event, such as occurs during
system level IEC 61000 ESD testing, substrate currents can
be generated in the IC that can trigger parasitic SCR
structures to turn ON, creating a low impedance path from
the V+ power supply to ground. This will result in a
significant amount of current flow in the IC which can
potentially create a latch-up state or permanently damage
the IC. The external V+ resistor limits the current during this
over-stress situation and has been found to prevent latch-up
or destructive damage for many overvoltage transient
events.
Under normal operation the sub-microamp IDD current of the
IC produces an insignificant voltage drop across the 100
Ω
series resistor resulting in no impact to switch operation or
performance.
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 8). 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 8). The resistor limits
the input current below the threshold that produces
FIGURE 5. CROSSTALK TEST CIRCUIT
FIGURE 6. CAPACITANCE TEST CIRCUIT
Test Circuits and Waveforms (Continued)
0V or V+
ANALYZER
V+
C
SIGNAL
GENERATOR
RL
GND
IN1
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
V+
C
GND
COM
IN
IMPEDANCE
ANALYZER
0V or V+
Repeat test for all switches.
NX1 OR NX2
FIGURE 7. V+ SERIES RESISTOR FOR ENHANCED ESD AND
LATCH-UP IMMUNITY
IN
COMx
100
Ω
NX
V+
GND
C
OPTIONAL
PROTECTION
RESISTOR
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(kāi)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(kāi)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(kāi)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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