參數(shù)資料
型號: MAX394MJP
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 運動控制電子
英文描述: Low-Voltage, Quad, SPDT, CMOS Analog Switch
中文描述: QUAD 1-CHANNEL, SGL POLE DOUBLE THROW SWITCH, CDIP20
封裝: 0.300 INCH, CERAMIC, DIP-20
文件頁數(shù): 9/12頁
文件大?。?/td> 134K
代理商: MAX394MJP
M
Low-Voltage, Quad, S PDT,
CMOS Analog S witc h
_______________________________________________________________________________________
9
__________Applic ations Information
Operation with S upply V oltages
Other than ±5V
The MAX394 switch operates with ±2.7V to ±8V bipolar
supplies and a +2.7V to +15V single supply. In either
case, analog signals ranging from V+ to V- can be
switched. The Typical Operating Characteristics graphs
show the typical on-resistance variation with analog signal
and supply voltage. The usual on-resistance temperature
coefficient is 0.5%/°C (typ).
Power-S upply S equenc ing
and Overvoltage Protec tion
Do not exceed the absolute maximum ratings, because
stresses beyond the listed ratings may cause perma-
nent damage to the device. Proper power-supply
sequencing is recommended for all CMOS devices.
Always apply V+, followed by V- (when using split sup-
plies) before applying analog signals or logic inputs,
especially if the analog or logic signals are not current-
limited. If this sequencing is not possible and if the ana-
log or logic inputs are not current-limited to less than
30mA, add a single diode (D1) for single-supply opera-
tion (Figure 1). If using dual supplies or if the analog
signal can dip below ground in single-supply operation,
add two small signal diodes (D1, D2), as shown in
Figure 1. Adding protection diodes reduces the analog
signal range to a diode drop above V- for D2. Leakage
is not affected by adding the diodes. On-resistance
increases by a small amount at low supply voltages.
Maximum supply voltage (V- to V+) must not exceed
17V.
Adding diodes D1 and D2 also protects against some
overvoltage situations. With the circuit of Figure 1, if the
supply voltage is below the absolute maximum rating
and if a fault voltage up to the absolute maximum rating
is applied to an analog signal pin, no damage will
result. For example, with ±5V supplies, analog signals
up to ±8.5V will not damage the circuit of Figure 1. If
only a single fault signal is present, the fault voltage
can go to +12V or -12V without damage.
_____________________Pin Desc ription
COM
V-
V+
NO or NC
* INTERNAL PROTECTION DIODES
D2
D1
-5V
+5V
MAX394
*
*
*
*
Figure 1. Overvoltage Protection Using Blocking Diodes
1, 10, 11, 20
IN1–IN4
Logic-Level Inputs
2, 9, 12, 19
NO1–NO4
Normally Open Switches
3, 8, 13, 18
COM1–COM4
Common Switch Poles
4, 7,14, 17
NC1–NC4
Normally Closed Switches
5
V-
Negative Power Supply
6
GND
Ground
16
V+
Positive Power Supply
15
N.C.
Not Internally Connected
PIN
NAME
FUNCTION
相關(guān)PDF資料
PDF描述
MAX394EWP Low-Voltage, Quad, SPDT, CMOS Analog Switch
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參數(shù)描述
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