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参数资料
| 型号： | ISL54053 |
| 厂商： | Intersil Corporation |
| 英文描述： | Ultra Low ON-Resistance, Low Voltage, Single Supply, SPDT Analog Switch |
| 中文描述： | 超低导通电阻，低电压，单电源，SPDT模拟开关 |
| 文件页数： | 7/11页 |
| 文件大小： | 306K |
| 代理商： | ISL54053 |
7
FN6460.0
March 16, 2007
Detailed Description
The ISL54053 is a bidirectional, single pole/double throw
(SPDT) analog switch which offers precise switching
capability from a single 1.8V to 5.5V supply with low
on-resistance (0.8
Ω
) and high speed operation (t
ON
= 24ns,
t
OFF
= 10ns). The device is especially well suited for portable
battery powered equipment due to its low operating supply
voltage (1.8V), low power consumption (5.5
μ
W), low leakage
currents (300nA max) and the small
μ
TDFN
package. The low
on-resistance and r
ON
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
Ω
resistor in
series with the logic 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 r
ON
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 ISL54053 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 4.5V maximum supply voltage, the ISL54053 5.5V
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 1.8V but the
part will operate with a supply below 1.8V. 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
on page 8 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
R
L
GND
IN
1
COM
NC or NO
50
Ω
V+
C
GND
NO or NC
COM
IN
IMPEDANCE
ANALYZER
V
INL
or V
INH
FIGURE 8. OVERVOLTAGE PROTECTION
GND
V
COM
V
NX
V+
IN
X
OPTIONAL
PROTECTION
RESISTOR
OPTIONAL
SCHOTTKY
DIODE
OPTIONAL
SCHOTTKY
DIODE
ISL54053
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL54053_0709 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Ultra Low ON-Resistance, Low Voltage, Single Supply, SPDT Analog Switch |
| ISL54053IHZ-T | 功能描述:IC SWITCH SPDT SGL SOT23-6 RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 其它有关文件:STG4159 View All Specifications 标准包装:5,000 系列:- 功能:开关 电路:1 x SPDT 导通状态电阻:300 毫欧 电压电源:双电源 电压 - 电源，单路/双路(±):±1.65 V ~ 4.8 V 电流 - 电源:50nA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:7-WFBGA，FCBGA 供应商设备封装:7-覆晶 包装:带卷 (TR) |
| ISL54053IRUZ-T | 功能描述:IC SWITCH SPDT 6UTDFN RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:36 系列:- 功能:多路复用器 电路:2 x 4:1 导通状态电阻:75 欧姆 电压电源:单/双电源 电压 - 电源，单路/双路(±):2 V ~ 12 V，±2 V ~ 6 V 电流 - 电源:- 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:20-SOIC（0.295"，7.50mm 宽） 供应商设备封装:20-SOIC W 包装:管件 |
| ISL54054 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Ultra Low ON-Resistance, Low Voltage, Single Supply, Single SPST/1:2 Distribution Analog Switch |
| ISL54054_0709 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Ultra Low ON-Resistance, Low Voltage, Single Supply, Single SPST/1:2 Distribution Analog Switch |
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