General Description

DA7217 is a high-performance, low-power audio codec optimized for use in headsets or wearable

devices. It has differential headphone outputs for use inside headset devices, offering excellent left to

right channel separation and common mode noise rejection. DA7217 also has a stereo DAC to

headphone output path and ultra-low power operating modes to support always-on audio detect

applications.

DA7217 contains two analog microphone input paths, or up to four digital microphone input paths, or

a combination of both. The other chip in this family, the DA7218, has single-ended headphone

outputs, and has been designed with headphone detect for use in accessories.

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 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 ultralow power mode

■ A high efficiency two-level, true-ground charge

pump for generating class-G headphone

supplies

■ Voice mode filtering up to 32 kHz

■ 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 I

2S interface

■ Digital tone generator with built-in support for

DTMF

■ System controller for simplified, pop-free startup 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

I

2S, four-channel I

2S, TDM and other audio

formats

■ 2-wire I

2C compatible control interface with

support for High Speed mode up to 3.4 MHz

■ 24-bit data at up to 96 kHz sample rate

■ The headphone amplifier can be run directly

from the supply, thus eliminating the need for

charge pump capacitors