Analogue switches maximise signal fidelity

Vishay has introduced two sets of 44V CMOS Single-Pole/Single-Throw (SPST) switches that provide low-distortion analogue switching for audio, video, data or power applications.

All devices minimise signal distortion and losses by presenting a low nominal on-resistance of 4Ω, with 0.2Ω flatness. In addition, 80ns turn-on time and 60ns turn-off time make these devices suitable for switching high-speed data or video signals.

One set of switches comprises the DG451, DG452 and DG453. These are pin-compatible with the Vishay DG411, DG412 and DG413 respectively, and ease power supply requirements by reducing power dissipation to 18µW. The DG451 provides four Normally-Closed (NC) switches, while those in the DG452 are Normally Open (NO). The DG453 comprises two NO and two NC switches.

The second series of switches introduced comprises the DG454, DG455 and DG456. These devices implement an onchip logic-voltage supply, which relieves the need to provide an external supply. The requirement for associated PCB tracking and power-supply sequencing capability are also eliminated. The DG454 and DG455 provide designers with the choice of four NC or four NO switches. The DG456 provides two NO and two NC switches.

All six devices are fully specified with dual supplies at ±5V or ±15V, or a single supply of 12V. They have logic-control thresholds of 0.8V and 2.4V, thereby ensuring compatibility with low-voltage TTL or CMOS signals.

 

FEATURES ±15V analogue signal range 60dB off-isolation @ 1MHz TSSOP-16 or SOIC-16 package

APPLICATIONS Audio and video systems Precision automatic test equipment Data-acquisition systems Relay replacement Communications systems Automotive and avionics systems Sample and hold systems

 

 

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