Maxim's Shunt-Mode Audio Click-and-Pop Eliminator Saves Space and Cost

Available in tiny UCSP(TM) and microDFN packages, the MAX9892 only requires one 0.1microfarad capacitor to complete the solution. This low-cost, ultra-compact solution is ideal for cell phones, portable media players and gaming consoles, notebooks, mobile internet devices (MIDs), and other audio applications.

The MAX9892 eliminates click-and-pop noise on power and shutdown cycles by connecting to the output of the existing amplifier and providing a low impedance path to ground during power on and off. This device has two low-impedance analog switches that are open and do not affect to outcome signal during normal operation. These switches are turned on during startup and shutdown to shunt the clicks and pops to ground.

The MAX9892 operates from a 1.7V to 3.6V single supply and consumes an ultra-low, 1microamp supply current. Offered in space-saving, 6-bump UCSP (1mm x 1.52mm x 0.6mm) and 6-pin microDFN (2mm x 2mm x 0.75mm) packages, the device is fully specified for operation over the -40 degrees Celsius to +85 degrees Celsius extended temperature range. Prices start at $0.38 (1000-up, FOB USA). An evaluation kit is available to speed designs.

Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company reported revenue in excess of $2 billion for fiscal 2008. Maxim was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, it has developed over 5900 products serving the industrial, communications, consumer, and computing markets.