GENERAL DESCRIPTION

The AK4367 is 24bit DAC with built-in Headphone Amplifier. The AK4367 features an analog mixing circuit that allows easy interfacing in mobile phone and portable communication designs. The integrated headphone amplifier features “pop-free” power-on/off, a mute control and delivers 50mW of power at 16Ω. The AK4367 is housed in a 20pin QFN package, making it suitable for portable applications.

FEATURE

□ Multi-bit ∆Σ DAC

□ Sampling Rate: 8kHz∼48kHz

□ 64x Oversampling

□ On chip perfect filtering 8 times FIR interpolator

- Passband: 20kHz

- Passband Ripple: ±0.02dB

- Stopband Attenuation: 54dB

□ Digital De-emphasis Filter: 32kHz, 44.1kHz and 48kHz

□ System Clock: 256fs/384fs/512fs

- AC Couple Input Available

□ Audio I/F Format: MSB First, 2’s Compliment

- I2S, 24bit MSB justified, 24bit/20bit/16bit LSB justified

□ Digital ATT

□ Analog Mixing Circuit

□ Mono Lineout

□ µP Interface: 3-wire/I2C

□ Bass Boost Function

□ Headphone Amplifier

- Output Power: 50mW x 2ch @16Ω, 3.3V

- S/N: 92dB@2.4V

- Pop Noise Free at Power-ON/OFF and Mute

□ Power Supply: 2.2V ∼ 3.6V

□ Power Supply Current: 2.8mA@2.4V (@HP-AMP no-output)

□ Ta: −40 ∼ 85°C

□ Small Package: 20pin QFN