AK4373 Datasheet, PDF (1/98 Pages) Asahi Kasei Microsystems – Low Power Stereo DAC with HP/SPK-Amp

[AK4373]
AK4373
Low Power Stereo DAC with HP/SPK-Amp
GENERAL DESCRIPTION
The AK4373 is a low power stereo 24bit DAC with an integrated stereo headphone amplifier and a
monaural speaker driver. It can be used for a variety of portable audio and media player applications,
including game consoles, dedicated headphone drivers, personal navigation devices, and portable media
players. The output drivers can be configured for three unique use cases: mono speaker driver or
single-ended ac-coupled headphones which can be used as stereo line-out, DC-coupled BTL
headphones and Pseudo Cap-less. The AK4373 operates off of a low-voltage power supply, ranging from
2.2V to 3.6V. The output amplifiers operate at up to 4.0V of the headphone power supply. The device is
packaged in a space-saving 32-pin QFN package.
FEATURES
† Sampling Rate: 8 kHz ∼ 48 kHz
† 8-times Over sampling Digital Filter
† SCF with high tolerance to clock jitter
† Stereo Headphone Amplifier
65mW output (Single-ended mode) into 16Ω 3.3V
SNR: 96dB
130mW output (Differential mode) into 32Ω 3.3V
SNR: 96dB
60mW output (Pseudo cap-less mode) into 16Ω 3.3V
SNR: 86dB
Pop-noise free at power-up and reset
† Stereo Lineout
SNR: 96dB
† Mono Speaker Driver
Available for both Dynamic and Piezo Speaker
0.8W @ 8Ω HVDD = 4.0V
1.0W @ 4Ω HVDD = 4.0V
SNR: 97dB
† Digital Processing
HPF, LPF, 3D Enhance, Frequency Compensation, 5-BiQuads,
Digital ALC/Limiter: +36dB to -54dB, 0.375dB/step
† Digital Volume Control: +12dB to -115dB, 0.5dB/step, Mute
† Analog Mixing: Mono input
† PLL: Input Frequency: 27MHz, 25MHz, 24MHz, 13.5MHz, 12.288MHz,
12MHz, and 11.2896MHz (MCKI pin)
1fs (LRCK pin)
32fs or 64fs (BICK pin)
Input Level: CMOS or AC coupling Input
† Master Clock (MCKI pin): 256/512/1024fs
† Master Clock Output (MCKO pin): 32fs, 64fs, 128fs, 256fs
† µP Interface: 3-Wire serial, I²C bus (version1.0, 400 KHz Fast-mode)
† Audio Interface Format: MSB First, 2’s complement
16/20/24bit MSB justified, 16/20/24bit LSB justified,
16/20/24bit I²S, 16/20/24bit DSP Mode
† CMOS Input Level
MS0991-E-00
-1-
2008/09