AK4497 Datasheet, PDF(1/98 Page) Asahi Kasei Microsystems

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AK4497 Datasheet, PDF (1/98 Pages) Asahi Kasei Microsystems – Quality Oriented 32-Bit 2ch DAC

[AK4497]

= Preliminary =

AK4497

Quality Oriented 32-Bit 2ch DAC

1. General Description

The AK4497 is a new generation Premium 32-bit 2ch DAC with VELVET SOUNDTM technology,

achieving industryâs leading level low distortion characteristics and wide dynamic range. The AK4497

integrates a newly developed switched capacitor filter âOSR Doublerâ, making it capable of supporting

wide range signals and achieving low out-of-band noise while realizing low power consumption.

Moreover, the AK4497 has six types of 32-bit digital filters, realizing simple and flexible sound tuning in

wide range of applications. The AK4497 accepts up to 768kHz PCM data and 22.4MHz DSD data, ideal

for a high-resolution audio source playback that are becoming widespread in network audios,

USB-DACs and Car Audio Systems.

Application: AV Receivers, CD/SACD player, Network Audios, USB DACs, USB Headphones, Sound

Plates/Bars, Measurement Equipment, Control Systems, Public Audios (PA), IC-Recorders,

Bluetooth Headphones, HD Audio/Voice Conference Systems

2. Features

ï· THD+N: -115dB

ï· DR, S/N: 127dB (Mono Mode, 130dB)

ï· 256 Times Over Sampling

ï· Sampling Rate: 8kHz ï¾ 768kHz

ï· 32-bit 8x Digital Filter

- Short Delay Sharp Roll-off, GD=6.0/fs,

Ripple: ï±0.005dB, Attenuation: 100dB

- Short Delay Slow Roll-off, GD=5.0/fs

- Sharp Roll-off

- Slow Roll-off

- Low-dispersion Short Delay Filter

- Super Slow Roll-off

ï· 2.8MHz, 5.6MHz, 11.2MHz, 22.4MHz DSD Input Support

- Filter1 (fc=39kHz, 2.8MHz mode), Filter2 (fc=76kHz, 2.8MHz mode)

ï· Digital De-emphasis for 32, 44.1, 48kHz sampling

ï· Soft Mute

ï· Digital Attenuator (255 levels and 0.5dB step)

ï· Mono Mode

ï· External Digital Filter Interface

ï· Audio I/F Format: 24/32 bit MSB justified, 16/20/24/32 bit LSB justified, I2S, DSD

ï· Master Clock

8kHz ~ 32kHz: 1152fs

8kHz ~ 54kHz: 512fs or 768fs

8kHz ~ 108kHz: 256fs or 384fs

108kHz ~ 216kHz: 128fs or 192fs

~ 384kHz: 64fs or 128fs

~ 768kHz: 64fs

ï· Power Supply:

TVDD=AVDD= 3.3 ï¾ 3.6V (by Internal LDO),

TVDD=AVDD= 1.7 ï¾ 3.6V, DVDD=1.7 ï¾ 1.98V (by external supply),

VDDL/R= 4.75 ï¾ 5.25V

ï· Digital Input Level: CMOS

ï· Package: 64-pin TQFP

Rev. 0.1

2015/11

-1-

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