DG188 Datasheet, PDF (1/8 Pages) Vishay Siliconix – High-Speed Drivers with SPDT JFET Switches

DG186/187/188
Vishay Siliconix
High-Speed Drivers with SPDT JFET Switches
FEATURES
D Constant On-Resistance Over
Entire Analog Range
D Low Leakage
D Low Crosstalk
D Rad Hardness
BENEFITS
D Low Distortion
D Eliminates Large Signal Errors
D High Precision
D High Bandwidth Capability
D Fault Protection
APPLICATIONS
D Audio Switching
D Video Switching
D Sample/Hold
D Guidance and Control Systems
D Telemetry
DESCRIPTION
The DG186/187/188 are precision single-pole, double-throw
(SPDT) 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
(DG186—10 W, DG187—30 W, DG188—75 W). Reduced
errors are achieved through low leakage current (I_D(on)
< 2 nA). Applications which benefit from the flat JFET
on-resistance include audio switching, video switching, and
data acquisition.
To achieve fast and accurate switch performance, each device
comprises two n-channel JFET transistors and a TTL
compatible bipolar driver. The driver is designed to achieve
break-before-make switching action, eliminating the
inadvertent shorting between channels and the crosstalk
which would result. 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
NC ₁
NC ₂
D_{1 3}
S_{1 4}
IN ₅
V+ ₆
V_{L 7}
Dual-In-Line
Top View
14 ^NC
13 ^NC
12 ^D2
11 ^S2
10 ^NC
9 ^V–
8 ^VR
NC
1
14
NC
NC
2
13
NC
Flat
D₁
3 Package 12
D₂
S₁
4
11
S₂
Top View
IN
5
10
NC
V+
6
9
V–*
V_L
7
8
V_R
Refer to JAN38510 Information, Military Section
D₂
D₁
10
1
S₁
2
S₂
9
NC
8
IN ³
Metal Can
7 _V–*
Top View
4
6
V+
5
V_R
V_L
*COMMON TO SUBSTRATE AND CASE
Document Number: 70033
S-52895—Rev. E, 16-Jun-97
TRUTH TABLE
Logic
0
SW₁
OFF
SW₂
ON
1
ON
OFF
Logic “0” v 0.8 V
Logic “1” w 2.0 V
www.vishay.com S FaxBack 408-970-5600
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