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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