Key Features
■ High performance stereo DAC to headphone playback path with 110 dB dynamic range
■ 4 mW stereo playback power consumption
■ DAC digital filters with audio and voice mode options, five-band equalizer and five programmable biquad stages
■ Dedicated low-latency digital sideband filter with three programmable biquad stages
■ High performance microphone to ADC record path with a 105 dB dynamic range
■ 2.5 mW stereo record power consumption
■ ADC digital filters with audio and voice mode options
■ 500 μW always-on record mode with automatic level detection
■ Hybrid analog / digital automatic level control to dynamically control the record level
■ Shutdown mode offering current consumption during standby of 2.5 μA
■ Two low-noise microphone bias regulators with programmable output voltage and ultra-low power mode
■ Ability to differentiate between stereo and mono headsets
■ Automatic detection of headset removal and confirmation of headset insertion
■ Flexible digital mixing from all seven inputs to all six outputs with independent gain on each mixer path
■ Ability to run the ADCs at a different sample rate to the DACs on a single I2S interface
■ Digital tone generator with built-in support for DTMF
■ System controller for simplified, pop-free start-up and shutdown
■ Phase-locked loop with sample rate tracking supporting MCLK frequencies from 2 MHz to 54 MHz
■ Automatic tuning of on-chip reference oscillator for clock-free operation in low-power modes
■ 4-wire digital audio interface with support for I2S, four-channel I2S, TDM and other audio formats
■ 2-wire I2C compatible control interface with support for High Speed mode up to 3.4 MHz
■ 24-bit data at up to 96 kHz sample rate
■ A high efficiency two-level, true-ground charge pump for generating class-G headphone supplies
■ Voice mode filtering up to 32 kHz