Product Name:AK4332ECB
Title:32-bit Mono Portable Audio DAC with Headphone Amplifier
Application:True Wireless Earphones

Description
Asahi Kasei Microdevices Corporation, (AKM), has developed a 32-bit mono portable audio DAC with a built-in headphone amplifier optimized for true wireless earphones, (TWS: True Wireless Stereo). The AK4332ECB supports both high quality sound and ultra-low power consumption, integrated into an ultra-small 30-pin CSP package. Mass production of the AK4332ECB is scheduled for the summer of 2019.

Features
<1>High Performance of -101dB THD+N with only 2.8mW Power Consumption
VELVET SOUND technology is optimized in pursuing high quality sound and high performance for TWS. The AK4332ECB achieves high performance of -101dB THD+N and 109dB SNR with the industry's most advanced level of ultra-low power consumption at 2.8 mW. This will enable TWS playback for long times with high quality sound.
<2>Capable of Achieving Even Lower Power Consumption with support of a 1-bit PDM signal
Further low power consumption is achieved by executing digital signal processing of the digital filtering and ΔΣ modulation with a Bluetooth SoC which utilizes small geometry transistors.

Main Specifications

Product Name	AK4331ECB	AK4332ECB
DAC	32-bit Stereo Portable  Audio D/A Converter	32-bit Mono Portable  Audio D/A Converter
Sound Color	Four Types of Digital Filters  - Acoustic Sound (Short Delay Sharp Roll-off, GD = 5.5/fs)  - Acoustic Tone (Short Delay Slow Roll-off, GD = 4.5/fs)  - Traditional Sound (Sharp Roll-off)  - Traditional Tone (Slow Roll-off)
Headphone Amplifier	Ground Referenced Class-G Headphone Amplifier  - Output Noise Level: -114dBV (Analog Volume = -10dB)  - Analog Volume: +4 to -10dB, 2dB Step
	Output Power: 70mW with 8Ω	Output Power: 88mW with 8Ω
THD+N (Total Harmonic Distortion Pulse Noise)	-100dB	-101dB
SNR	109dB
Sampling Rate	Maximum 192kHz　Master/Slave Mode
Jitter Cleaning Function	Available  Asynchronous Sample Rate Converter  Crystal Oscillator	None
Low Jitter PLL	Available
Digital MIC Interface	Available	None
Digital Audio Interface	PCM Input	PCM Input  PDM 1-bit Input  DSD Input
Resolution	32-bit
Number of Channels	2ch	1ch
Microcontroller Interface	I2C (400kHz)
VELVET SOUND Technology	Low distortion Technology  OSRD (Over Sampling Ratio Doubler) Technology
Power Consumption	4.4mW (fs = 48kHz)	2.8mW (fs = 48kHz)
Power Supply	AVDD = CVDD = LVDD = 1.7 to 1.9V  TVDD = 1.65 to 3.6V	AVDD = CVDD = LVDD = 1.7 to 1.9V
Operation Temperature Range	-40 to 85°C
Package	36-pin CSP   (2.533 × 2.371mm, 0.4mm pitch)	30-pin CSP   (2.371 × 1.971mm, 0.4mm pitch)
Mass Production	Now	Summer, 2019

source：https://www.akm.com