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參數(shù)資料
| 型號(hào)： | ISL43L210IHZ-T |
| 廠商： | Intersil |
| 文件頁(yè)數(shù)： | 11/12頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC SWITCH SPDT SC70-6 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 功能： | 開(kāi)關(guān) |
| 電路： | 1 x SPDT |
| 導(dǎo)通狀態(tài)電阻： | 360 毫歐 |
| 電壓電源： | 單電源 |
| 電壓 - 電源，單路/雙路(±)： | 1.1 V ~ 4.5 V |
| 電流 - 電源： | 50nA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 6-TSSOP，SC-88，SOT-363 |
| 供應(yīng)商設(shè)備封裝： | SC-70-6 |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁(yè)面： | 1246 (CN2011-ZH PDF) |
| 其它名稱： | ISL43L210IHZ-TDKR |
8
FN6131.0
March 15, 2005
Detailed Description
The ISL43L210 is a bidirectional, single pole/double throw
(SPDT) analog switch that offers precise switching capability
from a single +1.1V to +4.5V supply with low on-resistance
(0.34
) and high speed operation (tON = 7ns, tOFF =3ns). The
device is especially well suited for portable battery powered
equipment due to its low operating supply voltage (1.1V), low
power consumption (1.8
W max), low leakage currents
(100nA max), and the tiny SC70 packaging. The ultra low on-
resistance and Ron flatness provide very low insertion loss
and distortion to application 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 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
resistor in
series with the input (see 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.
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 RON switch. Connecting schottky
diodes to the signal pins as shown in Figure 8 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 ISL43L210 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 ISL43L210 4.7V
maximum supply voltage provides plenty of room for the
10% tolerance of 4.2V supplies, as well as room for
overshoot and noise spikes.
The minimum recommended supply voltage is 1.1V. 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 V+
ANALYZER
V+
C
NO or NC
SIGNAL
GENERATOR
RL
GND
IN1
COM
NC or NO
50
V+
C
GND
NO or NC
COM
IN
IMPEDANCE
ANALYZER
0V or V+
FIGURE 8. OVERVOLTAGE PROTECTION
GND
VCOM
VNX
V+
INX
OPTIONAL
PROTECTION
RESISTOR
OPTIONAL
SCHOTTKY
DIODE
OPTIONAL
SCHOTTKY
DIODE
ISL43L210
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| ISL43L220 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Ultra Low ON-Resistance, Low Voltage,Single Supply, Dual SPDT Analog Switch |
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