Low Power 24-Bit DAC with HP-AMP & MIXER

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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.

Key Features

• Multi-bit ΔΣDAC

• Sampling Rate: 8kH to 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 to 3.6V

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

• Ta: -40 to 85°C

• Small Package: 20pin QFN

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Block Diagram

Block Diagram

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