Speedy operation from low-on-resistance switches

Edited by the Electronicstalk editorial team Sep 20, 2002

Four new high-performance analogue switches from Intersil offer the industry's lowest on resistance and fastest switching times for switches the +15V maximum range.

Four new high-performance analogue switches from Intersil offer the industry's lowest on resistance (19uohm) and fastest switching times (28/20ns, switch-on/switch-off) for switches the +15V maximum range.

Competing switches in this range typically have on resistances of 30uohm and higher and switching times of 35/25ns and higher.

The new switches are suitable for a broad range of applications including portable battery-powered equipment in which space and power consumption are concerns.

Design-in is aided by thorough documentation of part performance and specification over the entire specified voltage and temperature ranges.

These new +2.7 to +12V (+15V max) single-supply switches are available in dual single-pole single-throw (SPST) or single-pole double-throw (SPDT) configurations in small SOIC or smaller SOT-23 packages.

They are offered in industry standard pin configurations.

Other features include a wide bandwidth for high frequency applications, and very high off isolation and crosstalk rejection.

Signal response is consistently flat even past 300MHz, over a wide voltage range, and stable for varying analogue signal levels.

At 1MHz, off isolation is greater than 70dB in 50ohm systems, decreasing approximately 20dB per decade as frequency increases.

Intersil provides enhanced device characterisation data for these new switches including complete specification tables at +3.3, +5 and +12V and specifications measured over the full temperature range.

The ISL5120 Series includes the following devices: ISL5120 two normally open SPST switches; ISL5121 two normally closed SPST switches; ISL5122 two SPST switches, one normally open and one normally closed; ISL5123 one SPDT switch (2:1 multiplexer); and the ISL5122 and ISL5123, with guaranteed make-before-break operation to prevent conflicts.