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DG183/184/185
Siliconix
S-52895—Rev. D, 16-Jun-97
1
High-Speed Drivers with Dual DPST JFET Switches
Features
Benefits
Applications
Constant On-Resistance Over
Entire Analog Range
Low Leakage
Low Crosstalk
Break-Before-Make Switching
Rad Hardness
Low Distortion
Eliminates Large Signal Errors
High Precision
Improved Channel Isolation
Eliminates Inadvertent Shorting
Between Channels
Fault Protection
Audio Switching
Precision Switching
Video Switching
Video Routing
Sample/Hold
Aerospace
Description
The DG183/184/185 are precision dual double-pole,
single-throw (DPST) 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
(DG183—10
errors are achieved through low leakage current (I
D(on)
< 2 nA). Applications which benefit from the flat JFET
, DG184—30
, DG185—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.
Functional Block Diagram and Pin Configuration
Truth Table
Logic
0
1
Switch
OFF
ON
Logic “0”
Logic 0
Logic “1”
0.8 V
2 0 V
2.0 V
Updates to this data sheet may be obtained via facsimile by calling Siliconix FaxBack, 1-408-970-5600. Please request FaxBack document #70032.