AK4438 Datasheet, PDF (1/63 Pages) Asahi Kasei Microsystems – 108dB 768kHz 32bit 8-Channel Audio DAC

[AK4438]
AK4438
108dB 768kHz 32bit 8-Channel Audio DAC
1. General Description
The AK4438 is an 8-channel 32-bit DAC which corresponds to digital audio systems. An internal circuit
includes newly developed 32-bit Digital Filter achieving short group delay and high quality sound. It
corresponds to a 768kHz PCM input at maximum, suitable for play backing high resolution audio sources
that are becoming widespread in network audios, USB-DACs and Car Audio Systems. In addition,
“OSR-Doubler” technology is newly adopted, making the AK4438 capable of supporting wide range
signals and achieving low out-of-band noise while realizing low power consumption. Moreover, the
AK4438 has five types of 32-bit digital filters, realizing simple and flexible sound making in wide range of
applications.
Application: AV Receivers, CD/SACD Players, Network Audios, USB DACs, USB Headphones, Sound
Plate/Bars, Car Audios, Automotive External Amplifiers, Measuring Instruments and Control
Systems.
2. Features
1. 8ch 32bit DAC
- 256 x Over sampling
- 32-bit High Quality Sound Short Delay Digital Filter
- Single-ended Output, Smoothing Filter
- THD+N: 91dB
- DR, S/N: 108dB
- Channel Independent Digital Volume Control (0dB～-127dB, 0.5dB Step, Mute)
- Soft Mute
- De-emphasis Filter (supporting 32kHz, 44.1kHz and 48kHz)
- I/F Format: MSB justified, LSB justified, I²S, TDM
- Zero Detection
2. Sampling Frequency
- Normal Speed Mode: 8kHz to 48kHz
- Double Speed Mode: 48kHz to 96kHz
- Quad Speed Mode: 96kHz to 192kHz
- Oct Speed Mode: 384kHz
- Hex Speed Mode: 768kHz
3. Master Clock
256fs, 384fs or 512fs, 768fs (Normal Speed Mode: fs=8kHz  48kHz)
256fs, 384fs
(Double Speed Mode: fs=48kHz  96kHz)
128fs, 192fs
(Quad Speed Mode: fs=96kHz  192kHz)
64fs, 96fs
(Oct Speed Mode: fs=384kHz)
32fs, 48fs
(Hex Speed Mode: fs=768kHz)
4. P Interface: 3-wire Serial/ I²C bus (Ver 1.0, 400kHz mode)
5. Power Supply
- Analog Supply: AVDD = 3.0  3.6V
- In/Output Buffer: TVDD = 1.7  3.6V
- Integrated LDO for Digital Power Supply
8. Power Consumption: 31mA (fs=48kHz)
9. Operating Temperature: Ta = - 40  105℃
10. Package: 32-pin QFN(0.5mm pitch)
016001925-E-00
-1-
2016/03