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PDF DG309 Data sheet ( Hoja de datos )

Número de pieza DG309
Descripción Quad Monolithic SPST CMOS Analog Switches
Fabricantes Vishay Siliconix 
Logotipo Vishay Siliconix Logotipo



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DG308A/DG309
Vishay Siliconix
Quad Monolithic SPST CMOS Analog Switches
FEATURES
D "15-V Analog Input Range
D Low On-Resistance: 60 W
D Fast Switching: 130 ns
D Low Power Dissipation: 30 nW
D CMOS Logic Compatible
BENEFITS
APPLICATIONS
D Full Rail-to-Rail Analog Signal Range
D Low Signal Error
D Wide Dynamic Range
D Single or Dual Supply Capability
D Static Protected Logic Inputs
D Space Savings (TSSOP)
D Portable and Battery Powered
Instrumentation
D Communication Systems
D Computer Peripherals
D High-Speed Multiplexing
DESCRIPTION
Featuring low on-resistance (60 W) and fast switching
(130 ns), the DG308A is supplied in the “normally open”
configuration while DG309 is supplied “normally closed.” Input
thresholds are high voltage CMOS compatible.
Designed with the Vishay Siliconix PLUS-40 CMOS process
to combine low power dissipation with a high breakdown
voltage rating of 44 V, each switch conducts equally well in
both directions when on, and blocks up to the supply voltage
when off. An epitaxial layer prevents latch up.
The DG308B/309B upgrades are recommended for new
designs.
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
IN1
D1
S1
V–
GND
S4
D4
IN4
1
2
3
4
5
6
7
8
DG308A
16 IN2
15 D2
14 S2
13 V+
12 NC
11 S3
10 D3
9 IN3
Top View
Four SPST Switches per Package
TRUTH TABLE
Logic
DG308A DG309
0
OFF
ON
1 ON OFF
Logic “0” v 3.5 V
Logic “1” w 11 V
Document Number: 70046
S-52882—Rev. E, 28-Apr-97
www.vishay.com S FaxBack 408-970-5600
4-1

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DG309 pdf
TEST CIRCUITS
DG308A/DG309
Vishay Siliconix
VS = +3 V
12 V
+15 V
V+
SD
IN
GND
V–
RL
1 kW
VO
CL
35 pF
–15 V
VO = VS
RL
RL + rDS(on)
Logic
Input
12 V
0V
Switch
Output
VO
FIGURE 2. Switching Time
50%
tr <20 ns
tf <20 ns
90%
tOFF
tON
APPLICATIONS
Single Supply Operation
The DG308A and DG309 will switch positive analog signals
while using a single positive supply. This will allow use in many
applications where only one supply is available. The trade-offs
or performance given up while using single supplies are:
1) increased rDS(on) and 2) slower switching speed. As stated
in the absolute maximum ratings section of the data sheet, the
analog voltage should not go above or below the supply
voltages which in single supply operation are V+ and 0 V.
Document Number: 70046
S-52882—Rev. E, 28-Apr-97
www.vishay.com S FaxBack 408-970-5600
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