DG187中文資料威世科技數(shù)據(jù)手冊(cè)PDF規(guī)格書

features

 Constant On-Resistance Over

Entire Analog Range

 Low Leakage

 Low Crosstalk

 Rad Hardness

benefits

 Low Distortion

 Eliminates Large Signal Errors

 High Precision

 High Bandwidth Capability

 Fault Protection

applications

 Audio Switching

 Video Switching

 Sample/Hold

 Guidance and Control Systems

 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 , DG187—30 , DG188—75  Reduced

errors are achieved through low leakage current (ID(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.