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參數(shù)資料
| 型號： | DG444 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Improved, Quad, SPST Analog Switches(接通電阻85Ω，漏電流0.50nA，導通速率251ns，改進型,四通道單刀單擲模擬開關) |
| 中文描述： | 改進的四路、SPST模擬開關 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 103K |
| 代理商： | DG444 |
______________________________________________T iming Diagrams/Test Circ uits
t
OFF
0.8 x V
OUT
V
OUT
0.8 x V
OUT
tf < 20ns
tr < 20ns
50%
0V
0V
+3V
SWITCH
OUTPUT
LOGIC INPUT WAVEFORM IS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
t
ON
SWITCH
INPUT
LOGIC
INPUT
+3V
IN
+5V
V-
-15V
( )
R
L
C
L
V
OUT
S
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
GND
REPEAT TEST FOR CHANNELS 2, 3, AND 4.
V
OUT
= V
D
L
LOGIC
INPUT
V
L
+15V
V+
D
DG444
DG445
Figure 2. Switching Time
__________Applic ations Information
General Operation
1. Switches are open when power is off.
2. IN, D, and S should not exceed V+ or V-, even with
the power off.
3. Switch leakage is from each analog switch terminal
to V+ or V-, not to other switch terminals.
Operation with S upply V oltages
Other T han ±15V
Using supply voltages other than ±15V will reduce the
analog signal range. The DG444/DG445 switches oper-
ate with ±4.5V to ±20V bipolar supplies or with a +10V
to +30V single supply; connect V- to 0V when operating
with a single supply. Also, all device types can operate
with unbalanced supplies such as +24V and -5V. V
L
must be connected to +5V to be TTL compatible, or to
V+ for CMOS-logic level inputs. The Typical Operating
Characteristics graphs show typical on-resistance with
±20V, ±15V, ±10V, and ±5V supplies. (Switching times
increase by a factor of two or more for operation at ±5V.)
Overvoltage Protec tion
Proper power-supply sequencing is recommended
for all CMOS devices. Do not exceed the absolute
maximum ratings because stresses beyond the list-
ed ratings may cause permanent damage to the
devices. Always sequence V+ on first, followed by
V
L
, V-, and logic inputs. If power-supply sequenc-
ing is not possible, add two small, external signal
diodes in series with supply pins for overvoltage
protection (Figure 1). Adding diodes reduces the
analog signal range to 1V below V+ and 1V above
V-, but low switch resistance and low leakage char-
acteristics are unaffected. Device operation is
unchanged, and the difference between V+ and V-
should not exceed +44V.
D
Improved, Quad, S PS T Analog S witc hes
6
_______________________________________________________________________________________
_____________________Pin Desc ription
V+
D
V-
S
V
g
Figure 1. Overvoltage Protection Using External Blocking Diodes
2, 15, 10, 7
3, 14, 11, 6
Positive Supply-Voltage Input—
connected to substrate
V+
13
Logic Supply-Voltage Input
V
L
12
Ground
GND
5
Negative Supply-Voltage Input
V-
4
PIN
Source Outputs
S1-S4
Drain Outputs
D1-D4
Logic Control Inputs
IN1-IN4
1, 16, 9, 8
FUNCTION
NAME
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相關代理商/技術參數(shù) |
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| DG444_06 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Monolithic, Quad SPST, CMOS Analog Switches |
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| DG444B | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Improved Quad SPST CMOS Analog Switches |
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