Maxim Semiconductor introduces the MAX9867 ultra-low power stereo audio codec designed for portable devices .
The MAX9867 operates using low voltage ( 1.8V supply ) and supports a 1.65V to 3.6V logic level. MAX9867 has an I2C 2-wire serial interface which allow control for volume levels, signal mixing, and general operating modes.
The MAX9867 has stereo differential microphone inputs that can be connected to either analog or digital microphones.The single-ended line inputs, with configurable preamplifier, can be sent to the ADC for record or routed directly to the headphone amplifier for playback.
The stereo headphone amplifiers support differential, single-ended, and capacitorless output configurations.
This architecture eliminates the need for an external PLL and multiple crystal oscillators.
The main features of the MAX9867 ultra-low power stereo audio codec are : 1.8V Single-Supply Operation , 6.7mW Playback Power Consumption , Battery-Measurement Auxiliary ADC , Support for Any Master Clock Between 10MHz to 60MHz , Stereo Digital Microphone Input Support , Stereo Analog Differential Microphone Inputs , Stereo Headphone Amplifiers(Differential,Single-Ended, or Capacitorless) , Stereo Line Inputs , Voiceband Filter with a Stopband Attenuation Greater than 70dB.