參數(shù)資料
型號(hào)： MAX354EPE
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 運(yùn)動(dòng)控制電子
英文描述： Fault-Protected Analog Multiplexers
中文描述： 8-CHANNEL, SGL ENDED MULTIPLEXER, PDIP16
封裝： PLASTIC, DIP-16
文件頁(yè)數(shù)： 9/12頁(yè)
文件大小： 130K
代理商： MAX354EPE
Figure 10 shows the condition of an off channel with V+
and V- present. As with Figures 8 and 9, either an N-
channel or a P-channel device will be off for any input
voltage from -40V to +40V. The leakage current with
negative overvoltages will immediately drop to a few
nanoamps at +25°C. For positive overvoltages, that
fault current will initially be 10μA or 20μA, decaying
over a few seconds to the nanoamp level. The time
constant of this decay is caused by the discharge of
stored charge from internal nodes and does not com-
promise the fault-protection scheme.
Figure 11 shows the condition of the on channel with
V+ and V- present. With input voltages less than ±10V,
all three FETs are on and the input signal appears at
the output. If the input voltage exceeds V+ minus the
N-channel threshold voltage (V
TN
), the N-channel FET
will turn off. For voltages more negative than V- minus
the P-channel threshold (V
TP
), the P-channel device will
turn off. Since V
TN
is typically 1.5V and V
TP
is typically
3V, the multiplexer’s output swing is limited to about -12V
to +13.5V with ±15V supplies.
S witc hing Charac teristic s
and Charge Injec tion
Table 1 shows typical charge injection levels versus
power-supply voltages and analog input voltage. The
charge injection that occurs during switching creates a
voltage transient whose magnitude is inversely propor-
tional to the capacitance on the multiplexer output.
M
Fault-Protec ted Analog Multiplexers
_______________________________________________________________________________________
9
G
D
Q1
S
-25V
S
N-CHANNEL MOSFET
IS TURNED ON
BECAUSE V
GS
= +25V
-25V
OVERVOLTAGE
P-CHANNEL
MOSFET IS OFF
G
D
Q2
G
D
Q3
S
Figure 8. -25V Overvoltage with Multiplexer Power Off
+15V
-15V
-15V
Q1
N-CHANNEL MOSFET
IS TURNED ON
BECAUSE V
GS
= +10V
-25V
OVERVOLTAGE
P-CHANNEL
MOSFET IS OFF
N-CHANNEL
MOSFET IS OFF
+15V FROM
DRIVERS
-15V FROM
DRIVERS
+25V FORCED
ON COMMON
OUTPUT LINE BY
EXTERNAL CIRCUITRY
Q2
Q3
Figure 10. -25V Overvoltage on an Off Channel with
Multiplexer Power Supply On
G
D
Q1
S
N-CHANNEL MOSFET
IS TURNED OFF
BECAUSE V
GS
= -25V
+25V
OVERVOLTAGE
G
D
Q2
S
G
D
Q3
S
Figure 9. +25V Overvoltage with Multiplexer Power Off
+15V
-15V
-15V
Q1
N-CHANNEL MOSFET
IS TURNED OFF
BECAUSE V
GS
= -10V
+25V
OVERVOLTAGE
13.5V
V
TN
= 1.5V
N-CHANNEL
MOSFET IS ON
-15V FROM
DRIVERS
+15V FROM
DRIVERS
13.5V
OUTPUT
Q2
Q3
Figure 11. +25V Overvoltage Input to the On Channel
Table 1. MAX354 Charge Injection
Test Conditions: C
L
, = 1000pF on mux output; the tabulated
analog input level is applied to channel 1; channels 2–8 inputs
are open circuited. EN = +5V, V
A1
= V
A2
= 0V, V
O
is toggled at
a 2kHz rate between 0V and 3V. +100pC of charge creates a
+100mV step when injected into a 1000pF load capacitance.
Supply Voltage
Analog Input Level
+2V
0V
-2V
Injected Charge
52pC
35pC
16pC
±5V
±10V
+5V
0V
-5V
105pC
65pC
25pC
±15V
+10V
0V
-10V
180pC
80pC
15pC
相關(guān)PDF資料
PDF描述
MAX354 Fault-Protected Analog Multiplexers
MAX355 MuxIt (TM) Serializer-Transmitter 32-TSSOP -40 to 85
MAX355CPE MuxIt (TM) Serializer-Transmitter 32-TSSOP -40 to 85
MAX355EPE MuxIt (TM) Receiver-Deserializer 32-TSSOP -40 to 85
MAX355MJE Fault-Protected Analog Multiplexers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX354EPE+ 功能描述:多路器開(kāi)關(guān) IC 8:1 Fault-Protected Analog MUX RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:7 Ohms 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
MAX354EWE 功能描述:多路器開(kāi)關(guān) IC RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:7 Ohms 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
MAX354EWE/GG8 功能描述:多路器開(kāi)關(guān) IC RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:7 Ohms 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
MAX354EWE+ 功能描述:多路器開(kāi)關(guān) IC 8:1 Fault-Protected Analog MUX RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:7 Ohms 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
MAX354EWE+T 功能描述:多路器開(kāi)關(guān) IC 8:1 Fault-Protected Analog MUX RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:7 Ohms 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
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