General description
DA7211 features a high fidelity and powerful 72 mW per channel headphone amplifier. The device may be operated from a single 1.8 V supply. Total device consumption is only 2.5 mW which helps extend music playback time for battery operated equipment.
The fully integrated fractional PLL has been designed to use minimal power while supporting a wide range of input and output frequencies. Internal suppression circuits help maintain audio synchronisation in the presence of system noise on the external clock.

KEY FEATUREs
■ Stereo multi-bit Delta Sigma DAC with SNR
   100 dB (A weighted @ 48 kHz)
■ Stereo multi-bit Delta Sigma ADC with SNR
   96 dB (A weighted @ 48 kHz)
■ Ultra low-power stereo headphone driver with
   □ Stereo DAC to HP playback power:
      2.5 mW
   □ 2x58 mW output power (16 Ω)
   □ ‘Capless’ output via GND centred signals
   □ Four level charge pump with continuous
      tracking of audio signal (Class G)
   □ Short circuit protection
■ Support of 8, 11.025, 12, 16, 22.05, 24, 32,
   44.1, 48 and 96 kHz sample rates
■ On-chip PLL with signal shaper and audio
   Sample Rate Matching
■ 2-wire software control interface
■ Audio serial data bus supports I2S,
   left/right justified, DSP and TDM modes
■ Stereo or mono differential microphone
   interface
■ Programmable ultra-low noise bias supply for
   electret microphones
■ Volume controlled stereo auxiliary inputs and
   outputs supporting FM Radio and fixed gain
   speaker amplifiers
■ Multi-mode audio routing and mixers
■ Pop & click suppression circuitry
■ ASSP DSP filter engine for digital audio
   enhancements (acoustic filtering, wind noise
   suppression, 5-band equaliser, 3D sound,
   automatic gain control)
■ Supports supply from single voltage
   (1.8/2.5 V)
■ Extensive modular power control
■ Package: 36 bump WL-CSP 3x3 – 0.5 mm
   pitch

APPLICATIONs
■ Personal media players
■ Portable consumer devices
■ Music handsets
■ Personal navigation devices