General description
The DA7212 is an ultra-low power audio codec targeting portable audio devices. The input paths support stereo FM line input and up to four analogue (or two analogue and two digital) microphones with two independent microphone biases. Comprehensive analogue mixing and bypass paths to the output drivers are available. 
The headphone output is true-ground Class G with integrated charge pump. There is also a differential Class AB speaker driver that can serve as a mono lineout.

KEY FEATUREs
■ 100 dB SNR stereo audio playback into 16 Ω
   headphones
■ 3.1 mW power consumption for stereo DAC to
   headphone playback
■ 1.2 W mono speaker driver
■ 650 µW mono voice record
■ Stereo digital microphone support
■ Supports up to four analogue microphones
■ Two low-noise microphone-bias outputs
■ Low-power PLL provides system clocking and
   audio sample rate flexibility
■ Built-in 5-band equaliser, ALC and noise-gate
   functions
■ Built-in beep generator
■ Integrated system controller to eliminate pops
   and clicks
■ Minimised external component count
■ 34-ball WL-CSP (4.54 mm x 1.66 mm)
   package
■ Staggered 0.5 mm pitch for easy PCB routing
   allowing low cost manufacture

APPLICATIONs
■ Personal Media Players
■ Audio headphone/headsets
■ Wearables
■ Embedded applications
■ Arduino compatible development systems