MAX9867 Audio codec brings digital microphone support and noise cancellation to compact electronics

Low-power audio codec has programmable filters for enhanced audio experience.

Maxim's latest low-power audio codec delivers a richer audio experience while extending battery life in portable devices.

SUNNYVALE, CA—October 1, 2009—Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX9867, a low-power, stereo audio codec that integrates features such as digital microphone support and programmable digital filters to deliver a richer audio experience to end users. Offering a combination of high-quality MP3 playback and extended battery life, the MAX9867 is well suited for portable consumer electronics such as cell phones, portable multimedia players, Bluetooth? stereo headsets, and gaming consoles.

The MAX9867 offers a complete voice record path with stereo differential microphone inputs and stereo single-ended line inputs. Integrated support for traditional analog microphones as well as digital microphones allows engineers to future-proof their designs.

For enhanced audio performance, the device includes a set of programmable digital filters that can be utilized during audio recording or playback. The filters provide the product designer with a simple method to eliminate system noise, such as the GSM packet frequency (217Hz), from the audio path. They also allow custom noise-cancellation schemes for improved isolation of vocal frequencies. Additionally, the headphone amplifier incorporates comprehensive click-and-pop circuitry that suppresses audible noise during volume changes, power on, and power off. This circuitry eliminates the large, costly capacitors required by conventional designs.

A low-power audio codec, the MAX9867 consumes a mere 6.7mW during stereo audio playback due to the combination of 1.8V single-supply operation with a highly efficient stereo headphone amplifier. This very low power consumption conserves battery life while ensuring high-quality audio playback in portable devices.

The MAX9867 is available in space-efficient, 2.2mm x 2.7mm x 0.4mm, 30-bump WLP and 5mm x 5mm, 32-pin TQFN packages. It is fully specified for operation over the -40°C to +85°C extended temperature range. Prices start at $0.95 (10,000-up, FOB USA).

Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company 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 6100 products serving the industrial, communications, consumer, and computing markets.

MAX9867,pdf,datasheet (Ultra-Low Power Stereo Audio Codec)