FEATURE
The AK4566 is a 20bit CODEC with built-in Input PGA and Headphone Amplifier. The AK4566 includes microphone/line input selector and ALC circuit for input, and Mono line output buffer, analog volume and stereo headphone amplifier for output which is suitable for portable applications. The AK4566 also features an analog mixing circuit that allows easy interfacing in mobile phone and portable communication designs. The integrated headphone amplifier features “click-free” power-on/off, a mute control and delivers 8.7mW of power into 16Ω load via 6.8Ω series resistor. The AK4566 is housed in a 28pin QFN package, making it suitable for portable applications.

FEATURE
□ 2ch 20bit ADC
   - S/N: 88dB
   - Single-ended input
   - 2 stereo inputs selector
   - Analog input PGA: +32dB ∼ -19dB, Mute, 0.5dB step (MIC input)
                              +20dB ∼ -31dB, Mute, 0.5dB step (LINE input)
   - Digital HPF for DC-offset cancellation
   - I/F format: 20bit MSB justified, I2S
□ 2ch 20bit DAC
   - I/F Format: I2S, 20bit MSB justified, 20bit/16bit LSB justified
   - Digital ATT: 0dB ∼ -127dB, Mute, 0.5dB step (soft transition)
   - Soft mute
   - Digital De-emphasis Filter: 32kHz, 44.1kHz and 48kHz
   - Bass Boost Function
□ Sampling Rate: 8kHz ∼ 48kHz
□ System clock: 256fs/384fs/512fs
   - Input level: CMOS or 1Vpp Analog Input
□ Analog Mixing Circuit
□ Mono Lineout
   - Analog volume: 0dB ∼ -30dB, Mute, 2dB step
□ Headphone Amplifier
   - Output Power: 8.7mW x 2ch @16Ω load & 6.8Ω series resistor
   - S/N: 90dB
□ µP Interface: 3-wire
□ Power management
□ Power supply: 2.7V ∼ 3.6V
□ Power dissipation: 16mA
□ Ta: -40 ∼ 85°C
□ Small Package: 28pin QFN (5.2mm x 5.2mm, 0.5mm pitch)