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MAX9856 低功耗音频CODEC，提供DirectDri

2008-10-02 00:00:00

MAX9856 低功耗音频CODEC，提供DirectDrive耳机放大器

The MAX9856 is a high-performance, low-power stereo
audio CODEC designed for MP3, personal media players
(PMPs), or other portable multimedia devices.
Using on-board stereo DirectDrive® headphone amplifiers,
the CODEC can output 30mW into stereo 32Ω
headphones while operating from a single 1.8V power
supply. Very low 9mW playback power consumption
makes it an ideal choice for battery-powered applications.
The MAX9856 provides microphone input amplifiers,
plus flexible input selection, signal mixing, and
automatic gain control (AGC). Comprehensive loadimpedance
sensing allows the MAX9856 to autodetect
most common audio and audio/video headset and jack
plug types.
Outputs include stereo DirectDrive line outputs and
DirectDrive headphone amplifiers. The stereo ADC can
convert audio signals from either internal or external
microphones that can be configured for single-ended
or differential signal inputs. Line inputs can be configured
as stereo, differential, or mono and fed through
one channel of the microphone path. The analog inputs
selected can be gain ranged or mixed with other input
sources prior to conversion to digital. The ADC path
also features programmable digital highpass filters to
remove DC offset voltages and wind noise.
The MAX9856 supports all common sample rates from
8kHz to 48kHz in both master and slave mode. The serial
digital audio interfaces support a variety of formats
including I2S, left-justified, and PCM modes.
The MAX9856 uses a thermally efficient, space-saving
40-pin, 6mm x 6mm x 0.8mm TQFN package.