FN6096.1 Detailed Description The ISL43L840 analog switches offer precise switching capability from a single 1.6V to 3.6V supply with low" />
參數(shù)資料
型號: ISL43L840IV-T
廠商: Intersil
文件頁數(shù): 8/11頁
文件大小: 0K
描述: IC MUX/DEMUX DUAL 4X1 16TSSOP
標(biāo)準(zhǔn)包裝: 2,500
功能: 多路復(fù)用器/多路分解器
電路: 2 x 4:1
導(dǎo)通狀態(tài)電阻: 750 毫歐
電壓電源: 單電源
電壓 - 電源,單路/雙路(±): 1.6 V ~ 3.6 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: 16-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 16-TSSOP
包裝: 帶卷 (TR)
6
FN6096.1
Detailed Description
The ISL43L840 analog switches offer precise switching
capability from a single 1.6V to 3.6V supply with low on-
resistance (0.5
) and high speed operation (tRANS = 19ns).
The device is especially well-suited to portable battery
powered equipment thanks to the low operating supply
voltage (1.6V), low power consumption (0.2
W), and low
leakage currents (60nA max). High frequency applications
also benefit from the wide bandwidth, and the very high off
isolation and crosstalk rejection.
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 one of the following
two protection methods should be employed.
Logic inputs can easily 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 applicable for the signal path inputs.
Adding a series resistor to the switch input defeats the
purpose of using a low RON switch, so two small signal
diodes can be added in series with the supply pins to provide
overvoltage protection for all pins (see Figure 8). These
additional diodes limit the analog signal from 1V below V+ to
1V above GND. The low leakage current performance is
unaffected by this approach, but the switch signal range is
FIGURE 4. OFF ISOLATION TEST CIRCUIT
FIGURE 5. RON TEST CIRCUIT
FIGURE 6. CROSSTALK TEST CIRCUIT
FIGURE 7. CAPACITANCE TEST CIRCUIT
Test Circuits and Waveforms (Continued)
ANALYZER
RL
SIGNAL
GENERATOR
0V or V+
NO or NC
COM
ADDX
GND
V+
C
0V or V+
NO or NC
COM
ADDX
GND
VNX
V1
RON = V1/100mA
100mA
V+
C
0V or V+
ANALYZER
NOA or NCA
SIGNAL
GENERATOR
RL
GND
ADDX
50
N.C.
COMB
NOB or NCB
V+
C
COMA
GND
NO or NC
COM
ADDX
IMPEDANCE
ANALYZER
0V or V+
V+
C
ISL43L840
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