ADG661

The ADG661, ADG662 and ADG663 are monolithic CMOS devices comprising four independently selectable switches. These switches feature low, well-controlled on resistance and wide analog signal range, making them ideal for precision analog
signal switching.

They are fabricated using Analog Devices' advanced linear compatible CMOS (LC2
MOS) process, which offers benefits of low leakage currents, ultralow power dissipation and low capaci tance for fast switching speeds with minimum charge injection. The on resistance profile is very flat over the full analog input range ensuring excellent linearity and low distortion when switching audio signals. Fast switching speed coupled with high signal bandwidth also make the parts suitable for video signal switching. CMOS construction ensures ultralow power dissipa-
tion making the parts ideally suited for portable and battery powered instruments.

The ADG661, ADG662 and ADG663 contain four indepen- dent SPST switches. The ADG661 and ADG662 differ only in that the digital control logic is inverted. The ADG661 switches are turned on with a logic low on the appropriate control input,
while a logic high is required for the ADG662. The ADG663 has two switches with digital control logic similar to that of the ADG661, while the logic is inverted on the other two switches.

Each switch conducts equally well in both directions when ON and has an input signal range that extends to the supplies. In the OFF condition, signal levels up to the supplies are blocked. All switches exhibit break-before-make switching action for use in multiplexer applications. Inherent in the design is low charge injection for minimum transients when switching the digital inputs.