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| 型号： | ISL54057 |
| 厂商： | Intersil Corporation |
| 英文描述： | Ultra Low ON-Resistance, Low-Voltage, Single Supply, Differential 4 to 1 Analog Multiplexer(超低导通电阻, 低电压, 单电源, 差分4合1模拟开关) |
| 中文描述： | 超低导通电阻，低电压，单电源，差分4到1模拟多路复用器（超低导通电阻，低电压，单电源，差分4合1模拟开关） |
| 文件页数： | 8/10页 |
| 文件大小： | 265K |
| 代理商： | ISL54057 |
8
FN6379.0
September 29, 2006
Power-Supply Considerations
The ISL54057 construction is typical of most 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 ISL54057 4.7V maximum supply voltage
provides plenty of room for the 10% tolerance of 3.6V
supplies, as well as room for overshoot and noise spikes.
The minimum recommended supply voltage is 1.6V but the
part will operate with a supply below 1.5V. 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 power the internal logic (thus setting the digital
switching point) and level shifters. The level shifters convert
the logic levels to switched V+ and V- signals to drive the
analog switch gate terminals.
Logic-Level Thresholds
This device is 1.8V CMOS compatible (0.5V and 1.4V) over
a supply range of 2.7V to 3.6V. At 2.7V the V
IL
level is about
0.54V. 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.
High-Frequency Performance
In 50
systems, signal response is reasonably flat even past
10MHz with a -3dB bandwidth of 70MHz (see Figure 12).
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 feed
through from a switch’s input to its output. Off Isolation is the
resistance to this feed through, while Crosstalk indicates the
amount of feed through from one switch to another.
Figure 11 details the high Off Isolation and Crosstalk
rejection provided by this family. At 100kHz, Off Isolation is
about 65dB 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.
Typical Performance Curves
T
A
= +25°C, Unless Otherwise Specified
FIGURE 8. ON RESISTANCE vs SUPPLY VOLTAGE vs
SWITCH VOLTAGE
FIGURE 9. ON RESISTANCE vs SWITCH VOLTAGE
0
1
2
3
4
R
O
)
V
COM
(V)
I
COM
= 100mA
0.3
0.4
0.5
0.6
0.7
0.8
V+ = 3V
V+ = 3.6V
V+ = 1.8V
V+ = 1.65V
V+ = 2.7V
R
O
)
V
COM
(V)
0
0.5
1
1.5
2
2.5
3
V+ = 3V
I
COM
= 100mA
0.25
0.3
0.35
0.4
0.45
0.5
+25°C
+85°C
-40°C
ISL54057
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL54057IRUZ-T | 功能描述:IC SWITCH 4X1 16UTQFN 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 |
| ISL54058 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Ultra Low ON-Resistance, Low-Voltage, Single Supply, Dual 4 to 1 Analog Multiplexer |
| ISL54058IRUZ-T | 功能描述:IC SWITCH DUAL 4X1 16UTQFN 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 |
| ISL54059 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:+1.8V to +6.5V, Sub-Ohm, Dual SPDT Analog Switch with Negative Signal Capability |
| ISL54059_09 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:+1.8V to +6.5V, Sub-Ohm, Dual SPDT Analog Switch with Negative Signal Capability |
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