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Teilenummer | DG308B |
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Beschreibung | (DG308B / DG309B) Improved Quad CMOS Analog Switches | |
Hersteller | Vishay Siliconix | |
Logo | ||
Gesamt 7 Seiten DG308B/309B
Vishay Siliconix
Improved Quad CMOS Analog Switches
FEATURES
D "22-V Supply Voltage Rating
D CMOS Compatible Logic
D Low On-Resistance—rDS(on): 45 W
D Low Leakage—ID(on): 20 pA
D Single Supply Operation Possible
D Extended Temperature Range
D Fast Switching—tON: < 200 ns
D Low Glitching—Q: 1 pC
BENEFITS
D Wide Analog Signal Range
D Simple Logic Interface
D Higher Accuracy
D Minimum Transients
D Reduced Power Consumption
D Superior to DG308A/309
D Space Savings (TSSOP)
APPLICATIONS
D Industrial Instrumentation
D Test Equipment
D Communications Systems
D Disk Drives
D Computer Peripherals
D Portable Instruments
D Sample-and-Hold Circuits
DESCRIPTION
The DG308B/309B analog switches are highly improved
versions of the industry-standard DG308A/309. These
devices are fabricated in Vishay Siliconix’ proprietary silicon
gate CMOS process, resulting in lower on-resistance, lower
leakage, higher speed, and lower power consumption.
These quad single-pole single-throw switches are designed
for a wide variety of applications in telecommunications,
instrumentation, process control, computer peripherals, etc.
An improved charge injection compensation design minimizes
switching transients. The DG308B and DG309B can handle
up to "22-V input signals. An epitaxial layer prevents latchup.
All devices feature true bi-directional performance in the on
condition, and will block signals to the supply levels in the off
condition.
The DG308B is a normally open switch and the DG309B is a
normally closed switch. (See Truth Table.)
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
DG308B
Dual-In-Line, SOIC and TSSOP
IN1
D1
S1
V–
GND
S4
D4
IN4
1
2
3
4
5
6
7
8
16 IN2
15 D2
14 S2
V+
13
NC
12
11 S3
10 D3
9 IN3
Top View
Document Number: 70047
S-52896—Rev. E, 14-Jul-97
TRUTH TABLE
Logic
DG308B DG309B
0
OFF
ON
1 ON OFF
Logic “0” v 3.5V
Logic “1” w 11 V
ORDERING INFORMATION
Temp Range
Package
Part Number
–40 to 85_C
–55 to 125_C
16-Pin Plastic DIP
16-Pin Narrow SOIC
16-Pin TSSOP
16-Pin CerDIP
DG308BDJ
DG309BDJ
DG308BDY
DG309BDY
DG308BDQ
DG309BDQ
DG308BAK
DG308BAK/883
DG309BAK
DG309BAK/883
www.vishay.com S FaxBack 408-970-5600
4-1
DG308B/309B
Vishay Siliconix
TEST CIRCUITS
+15 V
C
VS
Rg = 50 W
0V, 15 V
V+
SD
IN
GND V– C
VS
Off Isolation = 20 log
VO
–15 V
FIGURE 3. Off Isolation
+15 V
V+
Rg S
D
Vg
12 V
IN
GND
V–
–15 V
C +15 V
VO
50 W
V+
VS S1 D1
Rg = 50 W
0V, 15 V
IN1
S2
NC
D2
0V, 15 V
IN2
GND
C = RF bypass
XTALK Isolation = 20 log
VS
VO
V– C
–15 V
50 W
VO
50 W
FIGURE 4. Channel-to-Channel Crosstalk
VO
CL
1000 pF
VO
INX ON
DVO
OFF
ON
DVO = measured voltage error due to charge injection
The charge injection in coulombs is Q = CL x DVO
FIGURE 5. Charge Injection
APPLICATIONS
VIN1
+5 V
VL
+15 V
V+
VIN2
CH
GND
DG419
V–
30 pF
+15 V
+
LM101A
–
–15 V
Gain =
RF + RG
RG
–15 V
Gain 1 (x1)
Gain 2 (x10)
Gain 3 (x100)
Gain 4 (x1000)
Logic High = Switch On
DG308B
V–
–15 V
+15 V
RF1
18 kW
RF1
9.9 kW
RF1
100 kW
RG1
2 kW
RG2
100 W
RG3
100 W
GND
FIGURE 6. A Precision Amplifier with Digitally Programmable Inputs and Gains
www.vishay.com S FaxBack 408-970-5600
4-6
Document Number: 70047
S-52896—Rev. E, 14-Jul-97
6 Page | ||
Seiten | Gesamt 7 Seiten | |
PDF Download | [ DG308B Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
DG308 | Quad / SPST Analog Switches | Maxim Integrated |
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DG308A-DG309 | Quad / SPST Analog Switches | Maxim Integrated |
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