High Quality Sound D/A Converter dedicated to True Wireless Earphones
Low-power HiFi Headphone DAC for true wireless earphones
The AK4332 is an advanced 32-bit high sound quality mono audio DAC with a built-in ground-referenced headphone amplifier. It has four types of 32-bit digital filters for better sound quality, achieving low distortion characteristics and wide dynamic range. The AK4332 accepts PCM Data, PDM Data and DSD Data. It is available in a 30-pin CSP package, utilizing less board space than competitive offerings. It is ideal for true wireless earphones, (TWS: True Wireless Stereo).
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.
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.
True Wireless Earphones
|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|
|Sampling Rate||Maximum 192kHz Master/Slave Mode|
|Jitter Cleaning Function|| Available
Asynchronous Sample Rate Converter
|Low Jitter PLL||Available|
|Digital MIC Interface||Available||None|
|Digital Audio Interface||PCM Input|| PCM Input
PDM 1-bit Input
|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|
About VELVET SOUND
VELVET SOUND is a sound philosophy and brand concept for AKM’s next-generation audio devices, featuring new chip architectures and core technologies.
The new circuitry found in VELVET SOUND devices is designed to maximize dynamics and ensure pure, unaltered audio data, prioritizing the accurate capture and reproduction of the source material in order to achieve high performance and rich musicality. These devices were designed specifically for the high-resolution digital audio era.
*VELVET SOUND Logo™, Audio 4 Pro™ and Audio 2 Go™ are trademarks of Asahi Kasei Electronics Corporation in Japan, Europe and the United States.
by ASAHI KASEI MICRODEVICES