
S
1
S
2
D
1
D
2
NC
NC
NC
NC
IN
1
V–
V+
IN
2
V
L
V
R
Dual-In-Line
Top View
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Refer to JAN38510 Information, Military Section
1
Top View
V
R
S
1
2
3
4
5
6
7
8
9
10
V–
IN
2
D
2
S
2
D
1
IN
1
V+
V
L
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Top View
Flat
Package
S
1
D
1
NC
S
2
D
2
NC
NC
NC
IN
1
V+
IN
2
V–*
V
L
V
R
Metal Can
DG180/181/182
Vishay Siliconix
Document Number: 70031
S-52895—Rev. D, 16-Jun-97
www.vishay.com FaxBack 408-970-5600
4-1
High-Speed Drivers with Dual SPST JFET Switches
Constant On-Resistance Over
Entire Analog Range
Low Leakage
Low Crosstalk
Rad Hardness
Low Distortion
Eliminates Large Signal Errors
High Precision
High Bandwidth Capability
Fault Protection
Audio Switching
Video Switching
Sample/Hold
Guidance and Control Systems
Aerospace
The DG180/181/182 are precision dual single-pole,
single-throw (SPST) analog switches designed to provide
accurate switching of video and audio signals. This series is
ideally suited for applications requiring a constant
on-resistance over the entire analog range.
The major difference in the devices is the on-resistance
(DG180—10
errors are achieved through low leakage current (I
D(on)
< 2 nA). Applications which benefit from the flat JFET
, DG181—30
, DG182—75
Reduced
on-resistance include audio switching, video switching, and
data acquisition.
To achieve fast and accurate switch performance, each device
comprises four n-channel JFET transistors and a TTL
compatible bipolar driver. In the on state, each switch conducts
current equally well in either direction. In the off condition, the
switches will block up to 20 V peak-to-peak, with feedthrough
of less than –60 dB at 10 MHz.
*Common to Substrate and Case
Logic
0
1
Switch
ON
OFF
Logic “0”
Logic “1”
0.8 V
2 0 V
2.0 V