Improved switches are faster and more frugal

Edited by the Electronicstalk editorial team Sep 18, 2002

Intersil has added to its low-voltage, low-power analogue switch line for portable battery-powered applications with a pair of single-pole single-throw (SPST) switches.

Intersil has added to its low-voltage, low-power analogue switch line for portable battery-powered applications with a pair of single-pole single-throw (SPST) switches.

The ISL84514 has normally open (NO) contacts while the ISL84515 has normally closed (NC).

These new high-performance switches feature extremely thorough low voltage characterisation and documentation to aid design-in and qualification.

Aimed at applications such as mobile phones, portable test and medical equipment, PDAs, pagers, radios etc where small space and power consumption are important, they provide extremely low power consumption (less than 5uW) for extended battery life.

They also provide low leakage currents (maximum 1nA) for increased hold times in sample-and-hold-circuits, and fast switching speeds (Maximum switch-on and off times of 150 and 100ns, respectively) to reduce propagation delay in timing-sensitive applications.

Their minimal charge injection of 10pC maximises signal integrity, and they come in some of the smallest SOIC and SOT packages available alleviating board space limitations.

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

Available in both 8-lead SOIC and 5-lead SOT-23 packages, the ISL84514 and ISL84515 are pin compatible with standard Maxim MAX4514 and MAX4515 devices but offer improved performance and specifications.

By maintaining a second supplier in high-volume applications, customers reduce their risk of part shortages when industry demand strains supplier capacity.

Applications include: +3 and +5V DACs and ADCs; sample and hold circuits; digital filters; op-amp gain switching; high-frequency analogue switching; high-speed multiplexing; and integrator reset circuits.