SOURCE: Intersil


April 12, 2010 11:00 ET

Intersil's iSim™ Active Filter Designer Solves Three Tough Design Challenges

Free Online Design Tool Cuts Time-to-Market By Providing Board-Ready Op Amp Active Filter Solutions

MILPITAS, CA--(Marketwire - April 12, 2010) -  Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high-performance analog and mixed-signal semiconductors, today announced iSim Active Filter Designer for operational amplifier-based active filters. This new tool, the latest in Intersil's growing family of online design solutions, provides users with the industry's:

  1. Best parts recommendations: iSim delivers a ranked list of possible amplifiers that fit specific requirements considering supply voltages, signal swing limits, and dynamic characteristics that are often overlooked in more basic tools. 
  1. Enhanced implementation strategy: iSim's component calculations account for subtle amplifier and parasitic effect, improving the nominal filter accuracy and adding design margin. Designers can go from simulation to production with high confidence.
  1. More accurate simulations: iSim's op amp macromodels include second order effects such as bandwidth vs. gain and loading, input-output impedance, and I/O clipping. These predict physical limitations online before committing to production.

"This tool packs more than 25 years of op amp design expertise into a web-based platform that uses the industry's most powerful algorithms," said Michael Steffes, iSim filter tool design team leader. "The iSim Active Filter tool gives designers the ability to view the interstage and final output, AC response, noise, and step response, making it easy to see what is going on inside a multi-stage filter design and/or assess the impact of choosing alternate devices."

The tool enables an engineer to move from concept to design in four easy steps. First a user can match the right product from Intersil's large portfolio of high-performance operational amplifier ICs to their design needs. Next, a user can perform multiple simulations of a design online or locally using a personal computer. By comparing simulation results, a designer can quickly compare "what-if" scenarios to determine the best product for their application. In step three, they can summarize, document, and share designs with co-workers or customers. And finally a designer can download results to Intersil's unique iSim PE (Personal Edition) tool for further analysis using a more general Spice simulator platform.

The iSim Active Filter Designer has the flexibility to work with products as diverse as Intersil's micropower ISL28194 op amp (1.65mW), to the highest-speed current feedback op amp, the EL5167 ( > 600 MHz using < 100mW power). It provides solutions from 5Hz to 50MHz for products requiring 1.8V through 40V operating voltages. Filter designs that provide passband gains from 1 to 125V/V can also be developed using this tool.

The tool currently offers low pass filter designs from second through sixth order, and is being expanded to include high-pass and band-pass options. 

A complete overview of the Active Filter Designer may be found at 

More Information
iSim Active Filter Designer is available free as part of the growing iSim online simulation toolkit at:

About Intersil
Intersil Corporation is a leader in the design and manufacture of high-performance analog and mixed signal semiconductors. The Company's products address some of the industry's fastest growing markets, such as flat panel displays, cell phones, notebooks and other handheld systems. Intersil's product families address power management functions and analog signal processing functions. Intersil products include ICs for battery management, hot-plug controllers, linear regulators, power sequencers, supervisory ICs, bridge drivers, PWM controllers, switching DC/DC regulators, Zilker Labs Digital Power ICs and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; D2Audio products; video and high-performance operational amplifiers; high-speed data converters; interface ICs; analog switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and radiation-hardened applications. For more information about Intersil or to find out how to become a member of our winning team, visit the Company's web site and career page at