DA7218 Evaluation kit

DA7218 is a high-performance, low-power audio codec optimized for use in portable applications or wearable devices. It has single-ended headphone outputs with headphone detect for use in accessories, offering excellent left to right channel separation and common mode noise rejection.DA7218 also has a stereo DAC to headphone output path and ultra-low power operating modes to support always-on audio detect applications. DA7218 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 DA7217 has differential headphone outputs without headphone detect, and has been designed for use inside headset devices.

• 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 ultralow power mode
• Ability to differentiate between stereo and mono headsets
• Automatic detection of headset removal and confirmation of headset insertion
• 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 I²S 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 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