Update: 30 September, 2023
The MAX9867 is an ultra-low power stereo audio codec designed for portable consumer devices such as mobile phones and portable gaming consoles. The device features 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. An auxiliary ADC path can be used to track any DC voltage. The stereo headphone amplifiers support differential, single-ended, and capacitorless output configurations. Using the capacitorless output configuration, the device can output 10mW into 32Ω headphones. Comprehensive click-and-pop circuitry suppresses audible clicks and pops during volume changes and startup or shutdown. Utilizing Maxim’s proprietary digital circuitry, the device can accept any available 10MHz to 60MHz system clock. This architecture eliminates the need for an external PLL and multiple crystal oscillators. The stereo ADC and DAC paths provide user-configurable voice-band or audioband digital filters. Voiceband filters provide extra attenuation at the GSM packet frequency and greater than 70dB stopband attenuation at fS/2. The MAX9867 operates from a single 1.8V supply, and supports a 1.65V to 3.6V logic level. An I2C 2-wire seri- al interface provides control for volume levels, signal mixing, and general operating modes. The MAX9867 is available in a tiny 2.2mm 24-lead QFN package, suitable for applications with the most minimal space constraints.
File format: PDF
Size: -
MD5 Checksum: 62DEFC2835FF122F6B8019EBD89DB618
Publication date: 07 May, 2012
Downloads: -
PDF Link: MAXIM MAX9867 Ultra-Low Power Stereo Audio Codec handbook PDF